CN100499780C - Data processing method, data processing apparatus - Google Patents

Abstract

An apparatus and method are provided for determining the arrangement of data to ensure seamless reproduction even when jumps occur in a browsable slide show. An allowable jump range between image data clips and audio data clips required for reading data in the browsable slideshow is determined, so that an arrangement of data to be stored in the information recording medium is determined based on the determined allowable jump range condition that, in the browsable slide show, the continuous reproduction processing of still images and the audio reproduction processing are executed in parallel. This configuration enables a browsable slide show to be performed as a seamless reproduction process without any data gap. Furthermore, multiple combinations of read rates of audio data and image data can be provided.

Description

Data processing method and device

technical field

The present invention relates to a data processing method, a data processing device, an information recording medium, and a computer program. More specifically, the present invention relates to a data processing method, a data processing apparatus, an information recording medium, and a computer program for performing parallel reproduction of image data and audio data contained in different positions in a disc. In reproduction processing, seamless content reproduction is enabled by preventing a break in reproduction caused by jump processing that occurs during conversion and reading of each of image data and audio data.

Background technique

The recording medium may contain various software data including discs such as Blu-ray discs or DVDs (Digital Versatile Discs) obtained by applying blue laser light, such as music and the like. Audio data, image data of movies, etc., game programs, various applications, and the like.

There are regulations corresponding to these various data storage formats of data that allow each data to be stored in accordance with the format of each data.

Continuous reproduction of still images (so-called slide show) is available as one of the data reproduction modes. Each still picture signal is coded as an intra frame coded picture (I picture) of MPEG2 (Moving Picture Experts Group 2) video, and multiplexed with an MPEG2 transport stream. Furthermore, multiplexing of I picture, audio, and sub-picture with an MPEG2 transport stream enables reproduction of the audio and sub-picture in synchronization with the slide show. The above-mentioned slide show should provide reproduction based on PTS (PresentationTime Stamp) set as attribute information corresponding to a data as time information of reproduction timing, which follows a predetermined time.

In a configuration that allows image data and audio data to be stored separately on the disc, in order to reproduce the audio in parallel with continuous reproduction of still images (browsable slide show), it is necessary to perform processing in a prescribed order that is: read image data and audio data from the disc in turn, and store read data of each of the image data and audio data in a buffer, and then output via a process of decoding the data.

The process of reading and reproducing content stored on the disc follows the procedural steps of acquiring information from the disc, temporarily storing (caching) the acquired information, decoding buffer data, and outputting the decoded data.

Decoding buffer data includes processing such as, for example, if the content is in the form of MPEG data, decoding MPEG data, or if encrypted data is given, decoding encrypted data.

Where image data and audio data are stored separately on the disc, each data being located separately, then the read head is required to seek, ie a jump process is required. If a jump process occurs, which requires a period of time between the process of jumping to a position away from a certain data reproduction position of the disc and the process of reading and reproducing data from the next read position, In this case, the above-mentioned increase in the time period often results in a discontinuity in reproduction.

Thus, if the audio is read and reproduced in parallel with performing continuous reproduction of still images (browsable slide show) as described above, if the time required for jump processing is increased, then the A configuration in which alternate reading of image data and audio data is performed in one pass has a problem of discontinuity in reproduced data.

Contents of the invention

The present invention has been made in view of the above-mentioned problems, and intends to provide a data processing method, a data processing device, an information recording medium, and a computer program by adopting such a configuration that image data and audio data are provided in According to the regulation of the recording format in the information recording medium (disk), the predetermined data recording and reproduction processing can be performed, thereby enabling seamless reproduction that reduces the time required for jump processing without making the reproduction Data discontinuity, wherein the jump processing occurs when performing a browsable slide show for reproduction with audio.

Furthermore, the present invention provides a data processing method, a data processing apparatus, an information recording medium, and a computer program capable of making a plurality of combinations of reading rates of image data and audio data satisfy reproduction conditions, while Data gap does not occur, and data can be recorded/reproduced at a rate freely selected from the combinations.

A first aspect of the present invention is to provide a data processing method for determining an arrangement of recorded data including image data clips having image data and audio data clips having audio data for an information recording medium, the image data Data clipping and audio data clipping are applied to a browsable slide show in which audio reproduction processing is performed in parallel with continuous reproduction of still images, wherein the data processing method is characterized by including an allowable jump range determination step for determining the information the recording medium allows a jump range in reproduction processing, and includes a data arrangement determining step for determining the data arrangement so as to set the image data clip and the audio data clip within the allowable jump range calculated by the allowable jump range determining step, wherein The image data clips and audio data clips are stored on the information recording medium.

Furthermore, according to an embodiment of the data processing method for carrying out the present invention, the data arrangement determining step is characterized by including the step of calculating the data size S _MAIN of the image data clip and the data of the audio data clip for a browsable slide show. The size S _SUB , thereby determining the data arrangement, the data arrangement complies with such a setting, that is, when the allowable jump range calculated in the allowable jump range determination step obtains the D _MAX value, the setting satisfies the following conditions (a) and (b):

(a) S _MAIN + S _SUB ≤ D _MAX , and

(b) The image data clips and audio data clips should be respectively located in a continuous arrangement within the range of size D _MAX .

In addition, according to an embodiment of the data processing method of the present invention, the data processing method is characterized in that it further includes a required jump time calculation step for calculating based on the allowable jump range determined in the allowable jump range determination step time required for jumping, and includes a buffer size determination step for determining the size of the image data buffer and the audio data buffer based on the required jump time calculated in the required jump time calculation step, wherein the The image data buffer contains image data read from an information recording medium, and the audio data buffer contains audio data.

In addition, according to an embodiment of the data processing method for performing the present invention, the required jump time calculation step is characterized by including a calculation step of calculating the seek time of pickup and the related information recording medium in terms of jumping within the same layer. The sum of the overhead time (overheadtime) of the process of reading the data unit block, and in terms of the inter-layer jump, the calculation of the pickup seek time, the pickup adjustment time related to the inter-layer seek, and the reading of the information recording medium The sum of overhead times for the processing of blocks of data units.

Furthermore, according to an embodiment of the data processing method for carrying out the present invention, the data processing method is characterized by further comprising a data recording step for performing recording of data to the information recording medium based on the data arrangement determined in the data arrangement determining step.

A second aspect of the present invention is to provide a data processing apparatus for determining an arrangement of recorded data including image data clips with image data and audio data clips with audio data for an information recording medium, the data Applied to a browsable slide show that executes audio reproduction processing in parallel with continuous reproduction of still images, wherein the data processing apparatus is characterized by including allowable jump range determining means for determining that the information recording medium is allowed in the reproduction processing. jump range, and includes data arrangement determining means for determining data arrangement so as to set image data clips and audio data clips within the allowable jump range calculated by the allowable jump range determining means, wherein the image data clips and audio data clips Data clips are stored on the information recording medium.

Furthermore, according to a mode of the data processing apparatus for embodying the present invention, said data arrangement determining means is characterized by being means having such a form that the means calculates data for clipping of said image data for a browsable slide show. The size S _MAIN and the data size S _SUB of the audio data clip thereby determine the arrangement of the data, wherein the data arrangement follows the setting that when the allowable jump range calculated by the allowable jump range determining means When obtaining the D _MAX value, the following conditions (a) and (b) are met:

(a) S _MAIN + S _SUB ≤ D _MAX , and

(b) The image data clips and audio data clips should be respectively located in a continuous arrangement within the range of size D _MAX .

In addition, according to an embodiment of the data processing device for implementing the present invention, the data processing device is characterized in that it further includes required jump time calculation means for allowing jumps determined based on the allowed jump range determining means range to calculate jump required time, and includes buffer size determining means for determining the size of an image data buffer and an audio data buffer based on the required jump time calculated by said required jump time calculating means , wherein the image data buffer contains image data read from an information recording medium, and the audio data buffer contains audio data.

Furthermore, according to an embodiment of the data processing apparatus embodying the present invention, said required jump time calculation means is characterized in that it is a means of a form which calculates a picked up seek in terms of a jump within the same layer The sum of the time and the overhead time related to the processing of reading the data unit block of the information recording medium, and in terms of the inter-layer jump, calculating the pick-up seek time, the pick-up adjustment time related to the inter-layer seek, and the adjustment time related to the information recording medium The sum of the processing overhead time of the read data unit block.

Furthermore, according to an embodiment of the data processing apparatus embodying the present invention, the data processing apparatus is characterized by further comprising data recording means for performing recording of data into information based on the data arrangement determined by the data arrangement determination means. recording medium.

A third aspect of the present invention is to provide an information recording medium, wherein the information recording medium is characterized by including a data arrangement that allows clipping of image data and clipping of audio data including audio data under one condition Stored as recording data under the condition that the clips of image data and the clips of audio data applied to a browsable slide show that performs audio reproduction processing in parallel with continuous reproduction of still images are included together in the specified in an area within the allowed jump range.

Furthermore, according to a mode of the information recording medium embodying the present invention, the information recording medium is characterized by further comprising a data arrangement that, when applied to the data size of the image data clip of the browsable slide show and the audio When the data size of the data clip is assumed to be S _MAIN and S _SUB respectively, and when the allowable jump range obtains the D _MAX value, the following conditions (a) and (b) are met:

(a) S _MAIN + S _SUB ≤ D _MAX , and

(b) The image data clips and audio data clips should be respectively located in a continuous arrangement within the range of size D _MAX .

A fourth aspect of the present invention is to provide a computer program for implementing a process for determining an arrangement of recorded data for an information recording medium, the recorded data including a clip of image data with image data and a clip with audio an audio data clip of data applied to a browsable slide show in which audio reproduction processing is performed in parallel with continuous reproduction of still images, wherein said computer program is characterized by including a jump-allowed range determination step for determining said The information recording medium allows a jump range in reproduction processing, and includes a data arrangement determining step for determining a data arrangement so as to set image data clips and audio data clips within the allowable jump range calculated in the allowable jump range determining step , wherein the image data clip and the audio data clip are stored on the information recording medium.

Furthermore, a fifth aspect of the present invention resides in providing a data processing method for determining a recording data configuration to be applied to image data and audio data of a browsable slideshow that is to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images, including : a buffer size setting step for setting the overall buffer size of the image data and audio data in the reproducing device executing browsable slide show reproduction processing to a fixed value; a rate determining step for setting the overall buffer size of the reproducing device according to The image/audio data read rate is determined by each of the device size, the maximum jump time allowed for data reproduction, and the data read rate in the reproducing device.

Furthermore, in an embodiment of the data processing method of the present invention, the data processing method may further have a recording step for recording image data and audio data having a data format matching the image/audio data reading rate to the information recording medium or master information recording medium, wherein said image/audio data reading rate is determined in the rate determining step.

Furthermore, in an embodiment of the data processing method of the present invention, the rate determination step may be a step of determining the image/audio data read rate as the image data read rate and the audio data read rate satisfying the following formula combination, when the overall buffer size of the reproduction device is [RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , the data read rate in the reproduction device is R _UD , and the recorded data contains When the maximum reading rate of the image data is R _MAX1 and the maximum reading rate of the audio data contained in the recording data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

In addition, in an embodiment of the data processing method of the present invention, the rate determining step may be a step based on a combination of the image data reading rate and the audio data reading rate and the overall The image/audio data reading rate is determined by the table of the corresponding relationship between the buffer sizes. The above-mentioned image/audio data reading rate satisfies the following formula. When the overall buffer size of the reproduction device is [RB1+RB2], the data reproduction The maximum jump time allowed is T _JUMP , the data read rate in the reproducing device is R _UD , the maximum read rate of the image data contained in the record data is R _MAX1 , and the audio data contained in the record data The maximum read rate is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, in an embodiment of the data processing method of the present invention, the table is a table generated based on TS_Recording_Rate(R _TS ).

Furthermore, in an embodiment of the data processing method of the present invention, the rate determination step may be a step based on the combination of the image data read rate R _TS1 and the audio data read rate R _TS2 listed therein and the The table of the correspondence between the overall buffer size of the reproduction device to determine the image/audio data read rate, the above combination is defined by the following relational expression:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

Furthermore, a sixth aspect of the present invention resides in providing a data processing method for determining a recording data configuration to be applied to image data and audio data of a browsable slideshow to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images, wherein The method includes: a rate total value setting step for setting a rate total value X as the sum of an image data read rate and an audio data read rate applied to the browsable slide show; and a rate determination step for Determine the image data read rate R _TS1 and the audio data read rate R _TS2 satisfying the following formula:

R _TS1 +R _TS2 <=X

It is applied to the image data read rate R _TS1 and the audio data read rate R _TS2 defined by the following relational expression, when the maximum read rate of the image data contained in the record data is R _MAX1 , and the record data contained in When the maximum reading rate of audio data is R _MAX2 , the relational expression is:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

Furthermore, in an embodiment of the data processing method of the present invention, the rate determination step may use the value (192/188) as coefficients α and β in the following relational expression

R _MAX1 =R _TS1 ×α, and

R _MAX2 =R _TS2 ×β.

Furthermore, in an embodiment of the data processing method of the present invention, the data processing method may further have a recording step for converting image data and Audio data is recorded to an information recording medium or a master information recording medium, wherein the image/audio data reading rate is determined in the rate determining step.

In addition, in an embodiment of the data processing method of the present invention, the rate determining step may be a step based on a combination of the image data reading rate and the audio data reading rate and the overall The table of correspondence between the buffer sizes is used to determine the image data and audio data read rate, the above image data read rate and audio data read rate satisfy the following formula, when the overall buffer size of the reproduction device is set to [ RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , the data reading rate in the reproducing device is R _UD , the maximum reading rate of image data included in the recording data is R _MAX1 , and the When the maximum reading rate of the audio data contained in the recording data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, a seventh aspect of the present invention resides in providing a data processing apparatus for determining a recording data configuration to be applied to image data and audio data of a browsable slideshow that is to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images, The data processing apparatus includes: buffer size setting means for setting an overall buffer size of image data and audio data in a reproducing apparatus that executes browsable slide show reproduction processing to a fixed value; and rate determining means for The image/audio data reading rate is determined according to each of the overall buffer size of the reproducing device, the maximum jump time allowed for data reproduction, and the data reading rate in the reproducing device.

Furthermore, in an embodiment of the data processing apparatus of the present invention, the data processing apparatus may further have recording means that executes processing for converting data having a reading rate that matches the image/audio data The image data and audio data of the format in which the image/audio data read rate is determined in the rate determining step are recorded onto an information recording medium or a stamper.

In addition, in an embodiment of the data processing device of the present invention, the rate determining means may be configured to: determine the image/audio data read rate as a combination of the image data read rate and the audio data read rate, the above image The data reading rate and the audio data reading rate satisfy the following formula, when the overall buffer size of the reproducing device is [RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , and the data reading in the reproducing device When the fetch rate is R _UD , the maximum read rate of the image data included in the record data is R _MAX1 , and the maximum read rate of the audio data included in the record data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, in an embodiment of the data processing device of the present invention, said rate determining means is configured to: based on the difference between the combination of the image data read rate and the audio data read rate and the overall buffer size of the reproduction device listed therein The image/audio data reading rate is determined by the table of the corresponding relationship between them. The above-mentioned image data reading rate and audio data reading rate satisfy the following formula. When the overall buffer size of the reproducing device is [RB1+RB2], the data reproducing The maximum jump time allowed is T _JUMP , the data read rate in the reproducing device is R _UD , the maximum read rate of the image data contained in the record data is R _MAX1 , and the audio data contained in the record data The maximum read rate is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, in an embodiment of the data processing device of the present invention, the table may be a table generated based on TS_Recording_Rate.

Furthermore, in an embodiment of the data processing device of the present invention, the rate determination means may be configured to: based on the combination of the image data read rate R _TS1 and the audio data read rate R _TS2 listed therein and the reproduction The image/audio data read rate is determined by a table of the corresponding relationship between the overall buffer sizes of the device, and the above image data read rate R _TS1 and audio data read rate R _TS2 are defined by the following relational expressions:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

Furthermore, an eighth aspect of the present invention resides in providing a data processing apparatus for determining a recording data configuration to be applied to image data and audio data of a browsable slideshow that is to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images, The apparatus includes: rate total value setting means for setting a rate total value X as the sum of an image data read rate and an audio data read rate applied to a browsable slideshow; and rate determination means for determining An image data read rate R _TS1 and an audio data read rate R _TS2 satisfying the following formula:

R _TS1 +R _TS2 <=X

It is applied to the image data read rate R _TS1 and the audio data read rate R _TS2 defined by the following relational expression, when the maximum read rate of the image data contained in the record data is R _MAX1 , and the record data contained in When the audio data is R _MAX2 , the relational expression is:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

Furthermore, in an embodiment of the data processing apparatus of the present invention, the rate determining means is configured to perform processing in which the values (192/188) are used as coefficients α and β in the following relational expressions:

R _MAX1 =R _TS1 ×α, and

R _MAX2 =R _TS2 ×β.

Furthermore, in an embodiment of the data processing apparatus of the present invention, the data processing apparatus may further have recording means that executes processing for recording data having a reading rate matched with image data and audio data. Image data and audio data in a data format are recorded to an information recording medium or a master information recording medium, wherein the image/audio data reading rate is determined in the rate determining step.

Furthermore, in an embodiment of the data processing device of the present invention, the rate determination means may be configured to: based on the combination of the image data read rate and the audio data read rate and the overall buffer of the reproduction device listed therein The combination of image data and audio data read rates is determined by using a table of correspondences between buffer sizes. The above image data read rates and audio data read rates satisfy the following formula. When the overall buffer size of the reproduction device is [RB1+ RB2], the maximum jump time allowed for data reproduction is T _JUMP , the data reading rate in the reproducing device is R _UD , the maximum reading rate of image data included in the recording data is R _MAX1 , and the recording The maximum read rate of audio data contained in data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, a ninth aspect of the present invention is to provide an information recording medium manufacturing method including a buffer size setting step for storing the entirety of image data and audio data in a reproducing device that executes browsable slide show reproduction processing. The buffer size is set to a fixed value; the rate determination step for determining the image/audio data based on each of the overall buffer size of the reproducing device, the maximum jump time allowed for data reproduction, and the data read rate in the reproducing device a reading rate; and a recording step for recording image data and audio data having a data format matching the image/audio data read rate on an information recording medium or a master information recording medium, wherein the image/audio data The read rate is determined in the rate determination step.

Furthermore, in an embodiment of the information recording medium manufacturing method of the present invention, the rate determination step may be a step of determining the image/audio data read rate as a combination of the image data read rate and the audio data read rate , the above-mentioned image data reading rate and audio data reading rate satisfy the following formula, when the overall buffer size of the reproducing device is [RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , all the reproducing devices When the data reading rate is R _UD , the maximum reading rate of the image data included in the recording data is R _MAX1 , and the maximum reading rate of the audio data included in the recording data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, in an embodiment of the information recording medium manufacturing method of the present invention, the rate determination step may be a step based on the combination of the image data read rate and the audio data read rate and the overall The image/audio data reading rate is determined from the table of the correspondence relationship between the buffer sizes, the image data reading rate and the audio data reading rate satisfy the following formula, when the overall buffer size of the reproduction device is [RB1+RB2 ], the maximum jump time allowed for data reproduction is T _JUMP , the data reading rate in the reproducing device is R _UD , the maximum reading rate of the image data contained in the recording data is R _MAX1 , and the recording data The maximum read rate of the audio data contained in is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, in an embodiment of the information recording medium manufacturing method _of the present _invention , the rate determination step may be a step based on the combination and The image/audio data read rate is determined by a table of the correspondence relationship between the overall buffer sizes of the reproduction device, and the above image data read rate and audio data read rate are defined by the following relational expressions:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

Furthermore, the tenth aspect of the present invention is to provide an information recording medium manufacturing method, wherein the method includes: a rate total value setting step for setting the rate total value X as the image data applied to the browsable slide show The sum of the read rate and the audio data read rate; the rate determination step is used to determine the image data read rate R _TS1 and the audio data read rate R _TS2 satisfying the following formula, said formula being:

R _TS1 +R _TS2 <=X

It is applied to the image data read rate R _TS1 and the audio data read rate R _TS2 defined by the following relational expression, when the maximum read rate of the image data contained in the record data is R _MAX1 , and the record data contained in When the audio data is R _MAX2 , the relational expression is:

R _MAX1 =R _TS1 ×α, and

R _MAX2 =R _TS2 ×β, where α and β are coefficients,

A recording step of recording image data and audio data having a data format matching the image data reading rate and audio data reading rate determined in the rate determining step onto the information recording medium or the master information recording medium.

Furthermore, in an embodiment of the information recording medium manufacturing method of the present invention, the rate determination step may use the value (192/188) as the coefficients α and β in the following relational expression, which is:

R _MAX1 =R _TS1 ×α, and

R _MAX2 =R _TS2 ×β.

In addition, in an embodiment of the information recording medium manufacturing method of the present invention, the rate determination step may be a step based on the combination of the image data read rate and the audio data read rate and the reproducing device listed therein. The table of the correspondence relationship between the overall buffer size to determine the combination of image data and audio data read rate, the above image data read rate and audio data read rate satisfy the following formula, when the overall buffer size of the reproduction device is [RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , said data reading rate in the reproducing device is R _UD , the maximum reading rate of image data contained in recording data is R _MAX1 , and When the maximum reading rate of the audio data contained in the recording data is R _MAX2 , the formula is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

R _TS1 +R _TS2 <=X

Furthermore, an eleventh aspect of the present invention is an information recording medium including a data recording arrangement having a data arrangement in which image data and audio data correspond to an image/audio data reading rate, the image/audio data The data read rate is based on the overall buffer size of the image data and audio data of the reproduction device performing the browsable slideshow reproduction process, the maximum jump time allowed for data reproduction, and in said reproduction device with a jump distance is determined for each of the data read rates in which the jump processing at the time of reproduction can be performed within the maximum jump time in the jump distance.

Furthermore, in an embodiment of the information recording medium of the present invention, the image/audio data reading rate may be a combination of an image data reading rate and an audio data reading rate satisfying the following expression, when the overall buffer of the reproducing device The device size is [RB1+RB2], the maximum jump time allowed for data reproduction is T _JUMP , the data reading rate in the reproducing device is R _UD , and the maximum reading rate of image data included in the recording data is R _MAX1 , while the maximum reading rate of the audio data contained in the recording data is R _MAX2 , the expression is:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; <</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}$

Furthermore, a twelfth aspect of the present invention is a reproducing apparatus for performing a reproducing process of an information recording medium in which recording data including image data having image data is recorded at predetermined intervals. Image data clips and audio data clips with audio data, and the record data is applied to a browsable slide show that performs audio reproduction processing in parallel with continuous reproduction of still images, the reproduction device includes an image data buffer for storing image data read from the information recording medium; an audio data buffer for storing audio data read from the information recording medium; reproducing means for obtaining data from the image data buffer and the audio data buffer to execute a reproduction process; and a control unit for performing data read control to start a jump operation at an audio data recording position at predetermined intervals in the information recording medium with the image data buffer holding the image data at a maximum value.

Furthermore, a thirteenth aspect of the present invention resides in providing a computer program for causing a computer to execute processing for determining a browsable slide show to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images. Recording data configuration of image data and audio data, the process includes: a buffer size setting step for setting the overall buffer size of the image data and audio data in the reproducing device executing the browsable slide show reproduction process is a fixed value; and a rate determining step for determining the image/audio data read according to each of the overall buffer size of the reproducing device, the maximum jump time allowed for data reproduction, and the data reading rate in the reproducing device rate.

Furthermore, a fourteenth aspect of the present invention resides in providing a computer program that causes a computer to execute processing for determining a browsable image to be applied to audio reproduction processing performed in parallel with continuous reproduction of still images. Recording data configuration of image data and audio data for a slide show, the processing comprising: a rate total value setting step for setting the rate total value X as the image data read rate and audio data applied to the browsable slide show The sum of the reading rate; and the rate determination step, for determining the image data reading rate R _TS1 and the audio data reading rate R _TS2 satisfying the following formula, the formula is:

R _TS1 +R _TS2 <=X

It is applied to the image data read rate R _TS1 and the audio data read rate R _TS2 defined by the following relational expression, when the maximum read rate of the image data contained in the record data is R _MAX1 , and the record data contained in When the maximum reading rate of audio data is R _MAX2 , the relational expression is:

R _MAX1 =R _TS1 ×α, and

R _MAX2 = R _TS2 × β, where α and β are coefficients.

It should be noted that the computer program of the present invention can be used as a computer program that can be provided from a storage medium that can provide various programs and codes in a form readable by a computer for a computer system that The system allows various programs and codes to be executed, or to be executed via a communication medium, more specifically a recording medium such as CD, FD, and MO, or the like, or the communication medium such as a network or the like. Processing suitable for the program can be realized on the computer system by providing the above program in a computer-readable form.

The above and other objects, features and advantages of the present invention will be more apparent by referring to the detailed description of the following embodiments of the present invention and accompanying drawings. Incidentally, it should be understood that the system referred to in this specification is in the form of a logical aggregate of more than one unit, and that the units contained in the aggregate are not always incorporated into the same housing.

According to the configuration of the present invention, a configuration in which image data clips and audio data clips are respectively recorded in discs such as Blu-ray Discs and DVDs adopts a configuration in which audio reproduction processing is determined to be performed in parallel with continuous reproduction of still images. The allowable range of jumping from image data clips to audio data clips required when data reading occurs in the so-called browsable slide show, thereby determining the allowable jump range (information) stored in the information record based on the determined allowable jump range (information) The arrangement condition of data in the medium so that seamless reproduction can be performed without any data gaps when performing a browsable slide show for parallel reproduction of still images and audio.

Furthermore, the present invention employs a configuration in which the time required for jumping is calculated based on the determined allowable jump range information, thereby determining the image data buffer and the audio data buffer based on the calculated required jump time. size of the buffer, wherein the image data buffer contains image data read from an information recording medium and the audio data buffer contains audio data, so that a browsable slide show can be implemented with a smaller buffer meeting minimum requirements Configurations for seamless reproduction.

In addition, according to the configuration of the present invention, in the process of determining the recording data configuration of the image data and audio data applied to the browsable slide show executed in parallel with the audio reproduction processing performed in parallel with the continuous reproduction of still images, the execution browsable slide show The overall buffer size of image data and audio data in the reproducing device is set to a fixed value, and each of One to determine the image/audio data read rate. Accordingly, it is possible to record and reproduce data at a rate freely selected from a plurality of combinations of the image data read rate and the audio data read rate satisfying the A reproduction condition in which data discontinuity occurs, and thus, a configuration for recording/reproducing high-quality data such as 8-channel LPCM data can be realized.

In addition, according to the configuration of the present invention, in the process of determining the recording data configuration of the image data and audio data applied to the browsable slide show performed in parallel with the audio reproduction processing performed in parallel with the continuous reproduction of still images, the image data read rate and the total value of the audio data read rate are set to a fixed value [X], and the image/audio data read rate is determined according to the conditions thus set. Accordingly, it is possible to record and reproduce data at a rate freely selected from a plurality of combinations of the image data read rate and the audio data read rate satisfying that no Reproduction conditions where data is intermittent, and thus, a configuration for recording/reproducing high-quality data such as 8-channel LPCM data can be realized

Description of drawings

FIG. 1 is a view for explaining a storage format of content stored on a Blu-ray disc;

2 is a view for explaining the structure of a BDAV MPEG2 transport stream as an AV stream on a recording medium;

3 is a view showing details of correspondence between audio data clips and playlists applied to perform a browsable slide show so as to reproduce audio synchronously;

FIG. 4 is a view showing the structure of a reproducing device for reading and reproducing image data and audio data in a browsable slide show;

FIG. 5A is a view for explaining the structure of the main player 335, and FIG. 5B is a structure view of the audio player 336, both of which are included in the device shown in FIG. 4;

6 is a view for illustrating a cache mode concept of a browsable mode slide show;

7A is a graph showing an example of the bit occupancy rate of the elementary stream buffer EB (video code buffer) at the time of a browsable mode slide show, and FIG. 7B is a graph of an example of the bit occupancy rate of the audio code buffer B4;

FIG. 8 is a schematic diagram showing a mode of a reading method for simultaneously reading a main TS and an audio TS at the time of a browsable mode slide show;

9 is a view for explaining the driving standard for specifying jump processing at the time of disc reproduction and the time period between the end of reproduction at the jump origin and the start of reproduction at the jump destination;

10A is a view showing the structure of a disc having a plurality of recording layers, FIG. 10B shows an example of the intra-layer jump time (T _ACC ), and FIG. 10C shows an example of the inter-layer jump time (T _IL ). 10D shows exemplary measurements of overhead time (T _OH ) for explaining the requirement to achieve seamless reproduction when layer jumps occur in discs with multiple recording layers;

FIG. 11A shows the process of reading and reproducing data from the disc, and FIG. 11B shows the lapse of reproduction time and the conversion of the data size stored in the buffer shown in FIG. 11A;

FIG. 12A shows the lapse of reproduction time and the conversion of the data size stored in the buffer, and FIG. 12B is a graph showing assumed rate values of the lines shown in FIG. 12A;

13A to 13C are views for explaining a setting that ensures reproduction without data gap for interlayer jumps;

14 is a view for graphically explaining a method of determining a continuous data arrangement condition suitable for a value of a data recording rate with respect to a jump time;

FIG. 15 is a table that lists data corresponding to the values of the data recording rate (R _TS ) and the buffer size (S _RB ) according to each of the jump patterns A to C that have been described with reference to FIGS. 13A to 13C Arrangement conditions (minimum continuous data arrangement size);

FIG. 16 is a schematic diagram showing a mode of a reading method for simultaneously reading a main TS and an audio TS at the time of a browsable mode slide show;

17A-17C are views showing an example of setting of a jump mode for ensuring reproduction without data discontinuity in a browsable mode slide show;

Figure 18 is a table showing the buffer sizes required for each of the jump modes of Figures 13A and 17A-17C;

19A-19C are views for explaining data arrangement in the case of seamlessly connecting a plurality of clips in each jump pattern shown in FIGS. 17A-17C;

FIG. 20 is a view for explaining a structural example of a data processing apparatus for generating recording data of an information recording medium;

FIG. 21 is a flowchart for explaining a data processing sequence for generating recording data of an information recording medium;

22A and 22B are views for explaining a processing example (processing example A) of calculating a combination of the image data reading rate R _TS1 and the audio data reading rate R _TS2 ;

23 is a view for explaining a specific example of rate determination processing in a processing example (processing example A) of calculating a combination of an image data reading rate R _TS1 and an audio data reading rate R _TS2 ;

24A and 24B are views for explaining a processing example (processing example B) of calculating a combination of the image data reading rate R _TS1 and the audio data reading rate R _TS2 ;

25 is a view for explaining a specific example of rate determination processing in a processing example (processing example B) of calculating a combination of an image data reading rate R _TS1 and an audio data reading rate R _TS2 ;

26 is a view showing an example of a read rate setting table showing a combination of the audio data read rate R _TS2 and the image data read rate R _TS1 and the overall buffer size [RB1 +RB2] data corresponding to each other;

27 is a view showing an example of a reading rate setting table showing a combination of the audio data reading rate R _TS2 and the image data reading rate R _TS1 and the overall buffer size [RB1 +RB2] data corresponding to each other;

28 is a view showing an example of a reading rate setting table showing a combination of the audio data reading rate R _TS2 and the image data reading rate R _TS1 and the overall buffer size [RB1 +RB2] data corresponding to each other;

FIG. 29 is a flowchart for explaining the process of generating a read rate setting table;

FIG. 30 is a flowchart showing a process of calculating the image data read rate R _TS1 and the audio data read rate R _TS2 according to Formula 2;

31A is a flowchart showing the process of calculating the image data read rate R _TS1 and the audio data read rate R _TS2 according to the formula 2, and FIG. 31B is a list of the image data read rate R _TS1 and the audio data read rate. Take a table of combinations of rates R _TS2 ;

32 is a flow chart showing a process of calculating the image data read rate R _TS1 and the audio data read rate R _TS2 according to Equation 3;

Fig. 33 is a block diagram for explaining the functional structure of a data processing device that executes a process of determining a recording data configuration of image data and audio data applied to the above-mentioned browsable slide show;

Fig. 34 is a block diagram for explaining the functional structure of a data processing device that executes a process of determining a recording data configuration applied to image data and audio data of the above-mentioned browsable slide show; and

FIG. 35 is a view for explaining a structural example of a data processing apparatus that performs data recording processing on or reproduction processing from an information recording medium.

Detailed ways

Details of a data processing method, a data processing apparatus, an information recording medium, and a computer program will now be described with reference to the drawings. It should be noted that the descriptions are given in the order of the following items:

1. Contents stored on disk

2. Browsable slide show

3. Jump processing and content storage format

4. Content recording and reproduction processing

5. The configuration that can flexibly set the reading rate

6. Reproduction device configuration

[1. Contents stored on disk]

By adopting such a configuration that a prescribed recording format of image data and audio data is provided in the disc so as to perform prescribed data recording and reproduction processing, the present invention will be able to realize seamless reproduction by reducing jumps. Data is reproduced without interruption by taking the time required for jump processing that occurs when a browsable slide show is executed to reproduce audio in parallel with still images.

It should be noted that the embodiments given below are considered on the assumption that a Blu-ray Disc prescribed to be usable for recording and reproduction using a blue laser light is taken as an example of a disc-type information recording medium . A storage format of content stored in a Blu-ray Disc is described with reference to FIG. 1 .

The information recording medium should contain an AV stream and audio data of moving image content such as, for example, HD (High Definition) movie content specified as high-definition moving image data.

As shown in FIG. 1 , among the contents stored according to the Blu-ray Disc ROM standard format, there are levels conforming to the Blu-ray Disc ROM standard format. That is: (A) disc navigation program 210, (B) reproduction area identification file (playlist) 230, and (C) clip (content data file) 250.

A pair of individual AV streams and clip information defined as auxiliary information of the individual AV streams is assumed to be an individual object, which is referred to as a clip 250 . The AV stream file is called a clip AV stream file, and the auxiliary information of the AV stream file is called a clip information file.

Although data files for computers etc. are generally treated as byte strings, the content in the clip AV stream file is extended on a time basis, and the playlist 230 allows entry points in the clip 250 to be marked mainly by time ( time stamper) to specify. The entry point in the clip 250 is specified by using the playlist 230 through the time stamp, and the clip information can find out the decoding start address information of the stream contained in the AV stream file based on the time stamp.

The playlist 230 may be utilized in the form of a collection of reproduction area information contained in the clip 250 . An individual playback area included in a certain clip is called a play item, and the play item is represented by a pair of points IN and OUT on the time axis. That is, the playlist is considered to be in the form of a collection of playitems.

The top-order navigation program 210 provides a function of controlling the reproduction order of the playlist 230, and provides interactive reproduction of the playlist 230, and is written in accordance with a programming language (navigation command or Java, etc.), for example. Details of (A) the disc navigation program 210, (B) reproduction area identification file (the playlist) 230, and (C) the clip (content data file) 250 will be described below.

(A) The disc navigation program 210 contains index data and reproduction programs that can be specified by the user, and allows the user to give an input through the user interface in order to select a reproduction program corresponding to the index data specified by the user, thereby resulting in Reproduction control can be performed on condition that the relevant reproduction area identification file (the playlist) of the selected reproduction program is specified.

(B) The reproduction area identification file (the playlist) 230 includes one or more reproduction area identification files (the playlist). The individual reproduction area identification file (the playlist) is considered to have the form of a file containing one or more play items that select one or more AV stream data contained in the clip (the content data file) 250. file or audio data file, and the specific data part of the selected data file is designated as the reproduction start point and the reproduction end point, and the selection of the individual reproduction area identification file (the play list) can be performed by identifying the file according to the selected individual reproduction area identification file (the playback order determined by the play items contained in the playlist).

For example, the illustrated playlist 231 can be used as a playlist sufficed to perform a browsable slide show in which audio is read and reproduced in parallel with continuous reproduction of still images. The play list 231 is considered to be a list having a structure having a play item 232 for specifying a specific data portion of the clip information 252 in the image data clip 251, and a play item 232 for specifying a part to be reproduced in parallel with a still image. The subplayitem 233 of the specific data portion of the clip information 256 in the audio data clip 255 .

In the reproduction process of completing the selection of the play list 231, the image data to be reproduced is read from the image data clip 251 through the play item 232, and read from the audio data clip 255 through the sub play item 233. The audio data to be reproduced is fetched, thereby performing reproduction of image data and audio data in parallel.

Incidentally, the still image data to be displayed in the browsable slide show may be still image data generated based on moving image data contained in the image data clip 251, or alternatively, still image data contained in the image data clip 251. The data can also be used as it is.

(C) The clip (content data file) 250 can be used as a content data file segmented one by one, and is composed of an image data clip 251 containing the image data file, an audio data clip containing an audio data file, and the like.

The image data clip 251 has an AV (Audio-Video) stream file 253 and a clip information file 252 . The clip information file 252 can be used as a data file containing attribute information related to an AV (Audio-Video) stream file 253 . For example, the AV (Audio-Video) stream file 253 can be utilized as MPEG-TS (Moving Picture Experts Group-Transport Stream) data, and is considered to have ) to obtain the data arrangement, such as image (video) data and subtitle data. Furthermore, there are instances where command information necessary for controlling a reproduction device is also multiplexed when reproducing.

The audio data clip 255 has an audio data file 257 and a clip information file 256 . The clip information file 256 can be utilized as a data file containing attribute information related to the audio data file 257, and there is an instance in which command information necessary for controlling a reproducing device when reproducing is also multiplexed. reuse.

For example, when the reproduction of the content is performed by selecting the reproduction area identification file (the playlist) 231, the reproduction of the content makes the play item 232 correspond to the reproduction area identification file (the playlist) 231 so as to create an image The clip information 252 in the data clip 251 provides a reproduction start a and a reproduction end b so that specific data areas a and b of the AV stream file 253 specified as content contained in the image data clip 251 are considered to be reproduced. In addition, the subplayitem 233 provides the clip information 256 in the audio data clip 255 with a reproduction start point c and a reproduction end point d, so that it is considered that specific data of the audio data file 257 specified as the content contained in the audio data clip 255 will be reproduced. Audio data in regions c and d, whereby a browsable slideshow is performed.

That is, it is considered that a browsable slide show in which the audio data obtained from the audio data file 257 is reproduced in parallel with the continuous reproduction of still images obtained from the AV stream file 253 is started to be executed. acquired or produced.

When the content stored in the disc is contained for each data clip, the individual clips are stored in consecutive sectors defined as a contiguous recording area of the disc, however in this case different clips sometimes It is stored in a sector location set apart from continuous sectors. In the data storage format as described above, when the reproduction of the content is performed by selecting the above-mentioned reproduction area identification file (the playlist) 232, the reproduction of the content will generate a need for jumping during reproduction, Said jumps occur between different clips.

For a browsable slideshow, separate clips of the AV stream file 253 specified as the content contained in the image data clip 251 and the audio data file 257 specified as the content contained in the audio data clip 255 are required. Therefore, it is necessary to read the data in the corresponding data file by jumping the reading head between the recording areas of the image data clip 251 and the audio data clip 255 on the disc.

The AV stream on the recording medium has a BDAV MPEG2 transport stream structure as shown in Figure 2. The BDAV refers to Blu-ray Disc Audio-Visual (blu-ray Disc Audio-Visual). The BDAVMPEG2 Transport Stream structure provides the following features:

(a) BDAV MPEG2 transport stream includes an integer number of alignment units (alinged unit).

(b) A single alignment unit is 6144 bytes long (2048 times 3 bytes).

(c) A single alignment unit starts from the first byte of the source packet.

(d) The single source packet has a length of 192 bytes and includes a TP_extra_header and a transport packet. The TP_extra_header has a length of 4 bytes, and the transport packet has a length of 188 bytes.

(e) A single alignment unit includes 32 source packets.

The data of the video stream and the audio stream are packed into MPEG2 PES packets, and the PES packets are packed into transport packets.

[2. Browsable slide show]

A still image recording and reproducing method called a browsable slide show will now be described. The browsable slide show can be used as a process of reproducing audio in parallel with still images. The reproduction order of slides (still images) is predetermined, and the reproduction time of each slide is set to be finite or infinite. When the slideshow reproduction time relates to the infinitely set reproduction time as described above, the transition to reproduction of the next slideshow is not performed unless the user gives the reproduction device an instruction to transition to reproduction of the next slideshow. Thus, reproduction of the corresponding slideshow is not performed at a predetermined time on the time axis.

One embodiment of the processing applied to the case of asynchronous reproduction of image and audio data is now described, wherein said processing is in accordance with the format already described with reference to FIG. Sub play item to achieve. FIG. 3 is a view showing details of correspondence between audio data clips applied to execute a browsable slide show with asynchronously reproduced audio and the playlist.

The playlist includes one or more play items, the play items represent a reproduction path of still images, and the sub play items represent a reproduction path of audio. The reproduction start time (IN_time) and reproduction end time (OUT_time) of the sub play item are indicated by the corresponding reproduction start and end time stamps contained in the audio stream.

The reproducing device for performing a browsable slide show acquires an audio stream corresponding to a reproduction start time (IN_time) and a reproduction end time (OUT_time) of the sub play item with reference to the clip information, data address information on the recording medium, and The audio is read and reproduced using the address information.

Reproduction control information may be added to a playlist included in the playlist satisfying the browsable slide show. That is, it is considered that a flag indicating whether the reproduction in the reproduction area specified by the reproduction start time IN_time and the reproduction end time OUT_time of the audio stream is repeated or only once (is_repeat_Sub Play Item flag whether to repeat the flag of the sub play item), and Information indicating that playback of the sub play item is asynchronous with playback of the play item (sub play item type) is added as playback control information.

In this case, the reproduction device may perform the reproduction of the sub play item according to the following three methods. The first method consists in reading the still image file referred to by the PlayItem and the audio stream referred to by the SubPlayItem alternately in a time-sharing manner when reading data in the two files from the recording medium. In this case, the reproducing device reproduces the still image and the audio while alternately reading data in the two files from the recording medium.

The second method consists in first reading all the data in the audio stream file referred to by the subplayitem, and then storing the read data in a buffer memory included in the reproduction device. Then, the still image data related to the PlayItem is read from the recording medium. The reproducing device reproduces the still image and the audio while reading the still image data from the recording medium and reading the audio data from a buffer memory.

A third method consists in first reading all the data in the still image file referred to by the PlayItem, and then storing the read data in a buffer memory included in the reproduction device. Then, the audio stream related to the sub-play item is read from the recording medium. The reproducing device reproduces the still image and the audio while reading the audio stream from the recording medium, and reads the still image from a buffer memory.

Here, when the audio stream file involved by the subplayitem has a smaller byte length, the above-mentioned second method is effective, and when the still image file involved by the subplayitem has a smaller byte length, The third method works.

For example, if the size is actually several megabytes (Mbyte) large, then all file data can be read into buffer memory before rendering. The above-mentioned second method is considered to be effective because, when the application of the browsable slide show and the reproduction of the sub play items are repeatedly executed, the audio reproduction provides BGM (Background Music), for example , the data size of an audio stream of about 65 seconds transmitted at a bit rate of 256 kbps is about 2 megabytes (Mbyte).

The configuration of a reproduction device (player mode) for performing reproduction processing will now be described. FIG. 4 is a block diagram showing a reproduction device for performing reading and reproduction according to the first method described above. In the above-mentioned first method, when data in two files are read from the drive (the recording medium), the reproduction device alternately reads the main transport stream referred to by the PlayItem in a time-sharing manner file (still image file) (hereinafter referred to as the main TS), and the file of the audio transport stream involved in the sub-play item (hereinafter referred to as the audio TS).

The reproducing device reproduces still images and audio while alternately reading two file (main TS and audio TS) data by a reading unit (reading head) 331 that has access to the recording medium. Each file data read via the reading unit 331 is demodulated by the demodulation and ECC decoding unit 332 in which error correction is applied to the demodulated multiplexed stream. Then, the source packet data in the main TS file is buffered into the main TS read buffer 333 to buffer the main TS, and the source packet data in the audio TS file is buffered into the audio TS read buffer 334 to buffer the audio TS.

The stream data read from the main TS read buffer 333 is supplied to the main player (BDAVMPEG2 TS Player Model_1) 335 described later. The main player 335 outputs the stream data read from the main TS read buffer 333 at a transfer rate R _MAX1 to a post main PID (Packet ID) filter 337 at a predetermined timing (transfer rate R _TS1 ).

Furthermore, the stream data read from the audio TS read buffer 334 is supplied to an audio player (BDAV MPEG2 TS Player Mode 1_2) 336 described later. The audio player 336 outputs the stream data read from the audio TS read buffer 334 to the post audio PID (packet ID) filter 338 at the transfer rate R _MAX2 for a predetermined time (transfer rate R _TS2 ).

The main PID filter 337 allocates and outputs the supplied main TS to a later elementary stream decoder in response to a PID (Packet ID). That is, the still image (video), auxiliary image information (graphics and subtitles, etc.), and system information such as the _PSI of the main TS ( Program Specific Information (Program Specific Information)) and SI (Service Information (Service Information)). It should be noted that the SI has the form of a table that lists additional information of the TS and represents information other than the MPEG2 standard information. The SI is also packetized into transport packets. SI includes SIT (Selection Information Table) and the like.

The transport packets of still images are transferred from the transport buffer TB1 to the multibuffer MB at a fixed rate RX1, and furthermore, transferred to the elementary stream EB at a fixed rate _Rbx1 , and output after being decoded with the decoder D1. Furthermore, the transport packets of the auxiliary image information are transferred from the transport stream buffer TB2 to the buffer _B2 at a fixed rate Rx2, and are output after being decoded by the decoder D2. Furthermore, the transmission packet of the system information is transferred from the transmission buffer TB _sys1 to the buffer B _sys1 at a fixed rate Rx _sys1 , and is output after being decoded by the decoder D _sys1 .

Also, the audio PID filter 338 allocates and outputs the supplied audio transport stream to the latter elementary stream decoder in response to the PID (Packet ID). That is, the transport packets of the audio are transferred from the transport buffer TB4 to the main buffer B4 at a fixed rate _Rx4 , and are output after being decoded by the decoder D4. In addition, the transmission packet of the system information of the audio TS is transferred from the transmission buffer TB _sys2 to the buffer B _sys2 at a fixed rate Rx _sys2 , and is transferred to the decoder D _sys2 at a fixed rate Rsys and decoded by the decoder D _sys2 is then output.

Furthermore, an audio switch (audio SW) 339 is provided between the audio PID filter 338 and the transport stream buffer TB4 and TB _sys . The audio switch 339 is controlled by switching between two cases, the first case being based on the audio data obtained by integrating the audio data with the image data file, i.e. for example integrating the audio stream by multiplexing it with the main TS Data obtained from a data file to reproduce a slideshow in a non-browsable mode (also called a time-based mode) that reproduces image data and audio data synchronously, and in the second case by applying the A playitem and subplayitems corresponding to audio data files, as described with reference to FIG.

That is, the audio switch 339 has a non-browsable mode switch SWT connected to the main PID filter 337 which is given data from the main TS read buffer 333, And the audio switch 339 also has a browse mode switch SWB connected with the audio PID filter 338, the audio PID filter 338 is endowed with data from the audio read buffer 334, and the audio switch 339 switches the The audio switch is used to provide the audio stream to the transmission buffer TB4.

For example, in the case of the browsable slide show, the audio switch 339 is in the browsable mode switch SWB position, whereby in this case the audio stream is passed from the audio TS read buffer 334 through the audio PID filter 338 is provided to audio decoder D4. When performing a slide show in non-browsable mode, specifically, when an audio stream multiplexed with the main TS is given, for example, the audio switch 339 is in the non-browsable mode switch SWT position , in this case, the audio stream multiplexed with the main TS is supplied from the main TS read buffer 333 to the transmission buffer TB4 or TB _sys2 through the main PID filter 337 .

The elementary stream decoder is now described. Comments of TB _n , MB, EB, TB _sys , B _sys , Rx _n , Rbx _n , Rx _sys , D _n and D _sys and T-STD (System Target Decoder) in ISO/IEC13818-1 (MPEG2 System Standard) ) as defined in .

That is, the annotation is given as follows:

TBn (n=1 to 5): Transmission buffer for elementary stream n

MB: Multibuffer for the video stream in question

EB: elementary stream buffer for the video stream in question

TB _sys : input buffer for system information of the program in the process of being decoded

B _sys : the main buffer of the system target decoder for the system information of the program being decoded

Rx _n : the transfer rate at which data is moved from the TB _n

Rbx _n : Transfer rate to remove the payload of PES packets from MB _n (it is only valid for video streams)

Rx _sys : The transfer rate at which data is moved from the TB _sys

D _n : decoder for elementary stream n

D _sys : Decoder related to the system information of the program being decoded

The main player (BDAV, MPEG2\TS Player_1) 335 and audio player (BDAV MPEG2 Player_2) 336 included in the player mode shown in FIG. 4 will now be described. 5A and 5B are block diagrams showing the main player 335 and the audio player 336, respectively.

As shown in FIG. 5A, the main player 335 is set to provide source package data to the source depacketization unit 371 at the bit rate R _MAX1 , wherein the source package data is read from the main TS buffer 333 in the preparatory stage. read. The R _MAX1 indicates the bit rate of the source packet stream in the main TS file.

The arrival time clock counter 372 can be utilized as a binary counter for counting 27 MHz frequency pulses output from the pulse oscillator (27 MHz X-tal) 373. Then, the arrival time clock counter outputs the count value arrival_time_clock (arrival time clock)(i) obtained at time t(i).

The main TS and the audio TS have a data string form in units of source packets having transport packets and their arrival time stamps, and the single source packet has a single transport packet and its arrival_time_stamp (arrival time stamp) (ATS). The arrival_time_stamp represents the time stamp, and the time stamp is used to indicate the time when the corresponding transport packet in the main TS or audio TS arrives at the decoder. The time base created based on the arrival_time_stamp of each source packet included in each flow is called an arrival time base, and its clock is called an ATC (Arrival Time Clock, Arrival Time Clock).

Then, when the arrival_time_stamp of the current source packet read from the main TS is equal to the LSB (Least Significant Bit) 30-bit value from the count value arrival_time_clock(i) of the arrival time clock counter 372, the current source packet's The transport packets are output from the source depacketization unit 371 . The R _TS1 indicates the bit rate of the main TS.

In addition, as shown in FIG. 5B, the audio player 336 is set so as to provide the source packet data to the source depacketization unit 374 at the bit rate R _MAX2 , the source packet data is read buffer from the preparatory stage audio TS 334 reads. The bit rate R _MAX2 represents the bit rate of the source packet stream in the audio TS file.

Arrival time clock counter 375 and pulse oscillator 376 provide the same actions as in the master player 335 instance. Furthermore, the source depacketization unit 374 provides the same actions as in the master player 335 instance. That is to say, when the arrival_time_stamp of the current source packet is equal to the LSB 30-bit value from the count value arrival_time_clock(i) of the arrival time clock counter 375, the transport packet of the current source packet is output from the source depacketization unit 374. The R _TS2 indicates the bit rate of the audio TS.

The relationship between R _MAX1 , R _MAX2 and R _TS1 , R _TS2 will be precisely described. R _MAX1 is the maximum reading rate of the image data contained in the recording data, R _MAX2 is the maximum reading rate of the audio data contained in the recording data, R _TS1 is the transmission based on the transport stream of the image data contained in said recording data rate, and R _TS2 is the transfer rate based on the transport stream of the audio data contained in the recorded data.

As described above with reference to FIGS. 3 and 5 , the main player (for image data) (BDAV MPEG2TS player_1) 335 inputs source packet data, which is read from the main TS at bit rate R _MAX1 read from buffer 333. R _MAX1 is the bit rate of the source packet stream of the main TS file (the maximum reading rate of the image data contained in the recording data).

The source depacketization unit 371 (see FIG. 5 ) of the main player (for image data) 335 receives data at the bit rate R _MAX1 , and performs depacketization processing on the source packet according to the count value of the arrival time clock counter 372, so that The processed data is output from the source unpacketization unit 371 at bit rate R _TS1 .

In other words, the source packet stream of the main TS file is input to the main player (BDAV MPEG2 Player_1) 335 from the main TS read buffer 333 shown in _FIG . R _TS1 is output from the main player 335 shown in FIG. 4 on a data basis of 188 bytes.

This also applies to audio TS files constituting the audio data. The source packet stream is input at the bit rate R _MAX1 from the audio TS read _buffer 334 shown in FIG. The data of the section is the base output. Therefore, the relationship between R _MAX1 , R _MAX2 and R _TS1 , R _TS2 is as follows:

R _MAX1 =R _TS1 ×(192/188), and

_RMAX2 ＝ _RTS2 ×(192/188).

FIG. 6 is a view for illustrating the principle of the cache mode of the slide show in the browsable mode. For browsable mode, when the main TS file specified as the still image file referred to by the play item and the audio TS file referred to by the sub play item are read alternately from the drive at the rate R _UD in a time-sharing manner, it is necessary to ensure that the main TS file The bit rate R _MAX1 of the source packet stream of the TS and the bit rate R _MAX2 of the source packet stream of the audio TS.

7A and 7B are examples showing how many bits the elementary stream buffer EB (video code buffer) occupies and how many bits the audio code buffer B4 occupies when performing a slide show in the browseable mode shown in FIG. 4 . In FIGS. 7A and 7B , the vertical axis shows the buffer occupancy of the video code buffer and the audio code buffer, and the horizontal axis shows the system time clock STC of the main TS and the audio TS.

As shown in FIG. 7A, the startup delay is expressed as the time tV between the input of the first video packet and the time (DTS: Decoding Time Stamp, decoding time stamp) of the I-picture buffered in the stream buffer EB. period. In browsable mode, the user jumps to the next slide to start the input of the first video package. In FIGS. 7A and 7B, the gradient k _EB shows the input rate to the video buffer EB, and the gradient k _B4 shows the input rate to the audio buffer B4. It should be noted that in Fig. 7A, the period of time when the video codec occupancy remains constant due to the gradient k _EB being zero shows when auxiliary image information such as graphics and subtitles etc. are being read time period.

If the source packet stream of the main TS can be ensured to be read at the bit rate R _MAX1 , then the video decoder D1 shown in FIG. 4 can decode the still image in time within the specified decoding time. Furthermore, if it is possible to ensure that the source packet stream of the audio TS is read at the bit rate R _MAX2 , the audio decoder D4 shown in FIG. 4 can decode the audio data in time within the specified decoding time.

FIG. 8 is a schematic diagram illustrating a mode of a method of simultaneously reading a main TS and an audio TS when performing a slide show in a browsable mode.

Each of the main TS and the audio TS is assumed to be a continuous structure on the disc. Here, reading of the main TS and the audio TS is alternately performed as follows.

(1) Data of a predetermined size x is read from the main TS.

(2) Execute a jump to the specified data position of the audio TS.

(3) Read data of a predetermined size y from the audio TS.

(4) A jump is performed to a prescribed data position of the main TS.

Then, data of a predetermined size x is read from the main TS.

The data size x read from the above-mentioned main TS per read operation is assumed to be the minimum value of the size RB1 required by the main TS read buffer 333 . Also, the data size y read from the audio TS per read operation is assumed to be the minimum value of the size RB2 required by the audio TS read buffer 334 . Formula 1 applied to calculate the size required for each of the main TS read buffer 333 and the audio TS read buffer 334 is given below:

$\mathrm{<figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout>}1>={\mathrm{<figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout>}}_{\mathrm{MAX}}\&times;(2T_{\mathrm{JUMP}}+\frac{\mathrm{RB}2}{R_{\mathrm{UD}}-R_{\mathrm{MAX}2}}),$ as well as

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; JUMP</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; Eq</span>}<span\; class="notranslate">\; .</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ]</span>$

in:

RB1: the required size of the main TS read buffer 333 >= the data size read from the main TS for each read action

RB2: the required size of the audio TS read buffer 334 >= the data size read from the audio TS for each read operation

T _JUMP : jump time

R _UD : bit rate for reading from drive

R _MAX1 : The bit rate of the source packet stream of the main TS (maximum read bit rate)

R _MAX2 : Bit rate of source packet stream of audio TS (maximum read bit rate)

As an example, under the following conditions, i.e. assuming that the read rate _R from the drive is 54 Mbps (megabits per second), the jump time T _JUMP is 1.01 seconds, the bit rate R of the source packet stream of the main TS _MAX1 is 15 Mbps, and the bit rate R _MAX2 of the source packet stream of the audio TS is 2.0 Mbps, then the required size of the main TS read buffer 333 will be x=3.90 Mbytes (megabytes), and the audio TS read buffer 334 is The required size will be y=0.698MBytes.

Among the above parameters, the bit rate R _UD for reading from the drive, the bit rate R _MAX1 of the source packet stream of the main TS, and the bit rate R _MAX2 of the source packet stream of the audio TS can be basically determined according to the drive device, reproduction process However, the jump time T _JUMP is considered as a value that changes depending on the distance of the jump performed on the disk or the like. The above embodiment has given an example based on the assumption that the jump time T _JUMP is 1.01 seconds, however in this case, this value is limited to a value temporarily set by some jump processing, and the jump time T _JUMP should vary according to the distance of the jump performed on the disc, etc.

The buffer data size calculated based on the above becomes insufficient to satisfy the case where the jump time T _JUMP increases as the distance or the like of jumps performed on the disc increases, thereby causing the possibility of discontinuity in data reproduction. Therefore, it is necessary to specify the data arrangement so that the jump time T _JUMP is limited to a certain time or within the time, thereby performing data recording in accordance with the predetermined format of the data arrangement. Then, data recording in accordance with the above-mentioned format enables seamless reproduction which does not cause data breaks.

Now describe the jump time T _JUMP in the above expression and the details of the data recording configuration that is required to seamlessly execute a browsable slideshow without generating any data gaps, where the browsable slideshow is specified to reproduce audio and still image processing.

[3. Jump processing and content storage format]

During reproduction, in order to safely perform seamless reproduction processing when the disc-type information recording medium containing the content performs jump processing, it is necessary to specify the content storage location and to set the maximum jump distance to allow jumps to occur. The storage of the content is performed according to the set distance.

In DVD (Digital Versatile Disc) specified as the disc-type recording medium, the drive standard for performing disc reproduction refers to the drive standard established so that between terminating reproduction at the jump start point and starting reproduction at the jump destination The period of time is limited to a specified period of time or less in order to allow seamless reproduction in the event of a jump within an individual recording layer.

The driver standard will now be described with reference to FIG. 9 . In FIG. 9, a disc 501 mounted in a spindle motor 500 is rotated so as to allow the data to be reproduced and recorded using a pickup not shown. The contents stored in the disc are contained in sector units corresponding to a prescribed data size.

In the graph shown in FIG. 9, the horizontal axis shows the jump distance indicated by the sector number, and the vertical axis shows the access time [ms (milliseconds)]. As shown in the graph of FIG. 9, the drive standard in DVD specifies the maximum access time allowed when a jump corresponding to a specified sector number occurs.

If the given drive device is capable of access involving the jump process within the maximum allowed access time shown in FIG. 9 or below, then the content can be stored in the standard-compliant DVD in order to ensure seamless reproduction even if a jump occurs within the same layer when reproducing the content. That is, the recording of the content is considered to be performed under the condition that the content stored in the disc is set so as not to jump to a position exceeding the maximum allowed access time processing, as shown in the chart in Figure 9.

However, there has not yet been provided any specification for image data and audio data recording formats suitable for performing a browsable slide show that reads and reproduces audio in parallel with continuous reproduction of still images. The present invention provides a configuration capable of seamlessly performing a browsable slideshow without generating any data gap, and details thereof are described below.

First, an overview of data recording and reproduction processing involving jump processing will be described. Referring to FIG. 10 , in view of both jumps in an internal disk of the same layer (intra-layer jump) and jumps between disks of different layers (inter-layer jump), regarding a disc having more than one recording layer, The conditions required to achieve seamless reproduction are given some considerations.

FIG. 10A shows a dual-layer disk configuration. The data is recorded in the first layer 511 and the second layer 512 in sector units defined as content data recording units. The recording data should include image data clips and audio data clips, which have been described with reference to FIG. 1 .

Jump processing appropriate to the reproduction mode of the content occurs when a disc containing the content is reproduced. There are examples such as reproduction of different AV streams or processing reproduced in a browsable slide show performed while reading image data clips and audio data clips alternately.

It should be noted that jump processing involving the reproduction of discs having the described structure of more than one recording layer can be utilized in two ways, namely a jump processing between recording areas in the same layer, and a jump processing between recording areas in different layers. Another kind of jump processing between recording areas. The present invention realizes a configuration capable of seamless reproduction during the occurrence of inter-layer jumps, and performs calculation of the total time required when inter-layer jumps are performed.

FIG _. 10B is a table showing one embodiment of an intra-layer jump time (T _ACC ) suitable for a jump distance in a disc configuration having a single-layer recording capacity of 23.3 gigabytes. From the top, the table lists [jump distance (sector or run)], [data size corresponding to the jump distance (MB)], and [intra-layer jump time (milliseconds)]. The [intra-layer jump time (milliseconds)] corresponds to the time required for the seek of the pickup of the drive device for performing reproduction of the Blu-ray Disc, that is, the seek time.

In the table of FIG. 10B , the [jump distance (sector or stroke)] is set so as to give a jump distance of 40000 sectors or less expressed in sectors, and 1/10 of a stroke expressed in strokes or jump distance above. The full stroke corresponds to the stroke ranging from the innermost to the outermost side of the disk, as shown in FIG. 10A .

It should be noted that there is a relationship of 40,000 sectors < 1/10 stroke between the jump distance of 40,000 sectors and the jump distance of 1/10 stroke, that is, the entries from left to right in the table, The jump distance is increased. The reason for giving entries with larger jump distances in the sector representation is that there is a larger difference in sector numbers between the inside and outside of the disc, thereby using the sector representation for larger jump distances. The jump distance increases the range of sector numbers by a large amount.

In addition, in terms of jump distances of 1/10 stroke, 1/3 stroke, and half stroke, data sizes are given in terms of lower limit representation. This is because there is a difference in the corresponding data sizes between the inner and outer sides of the disc, even in the same case of 1/10 stroke, whereby the calculated value obtained at the inner side where the data size is minimized is used to give Out of the lower limit said. It should be noted that if the lower limit of the data size corresponding to a certain jump distance is taken into consideration, it is considered sufficient to determine the data arrangement condition described later, whereby the upper limit of the corresponding data size will not be described.

For example, the jump distance of the full run corresponds to a run in the range from the innermost to the outermost side of the disc, and the jump data size reaches 23.3 gigabytes at the full run. The time required for jumping all the trips within a layer, that is, the jump time within a layer [T _ACC ] is 1220 milliseconds.

If the jump distance is within the range of 0 to 5000 sectors, then the size of the jump data is within the range of 0 to 10× ²²⁰ bytes, and the time required for the intra-layer jump, that is, the intra-layer jump time [T _ACC ] is 179 milliseconds.

FIG. 10C shows the measured value of interlayer jump time (T _IL ) in a certain driver device. That is to say, the inter-layer jump time [T _IL ]=360 milliseconds. This value corresponds to the time required for an adjustment, such as a focus adjustment of a pickup, when changing the reproduction position to a different layer among the first and second layers 511 and 512 in FIG. 10A in the driver device. , the drive device is used to perform reproduction of Blu-ray discs.

FIG. 10D shows a measurement of the overhead time [T _OH ] that is incurred when reading the ECC block bounds in some drive devices. That is, [T _OH ] = 20 milliseconds.

In order to read content stored in said Blu-ray Disc, an arrangement is provided specifying a data reading unit. The data reading unit is called an ECC block. The ECC block has the form of a block composed of user data such as AV stream data specified as actual content data, user control data (UCD) including various control data, and parity for error correction. Check data etc. are formed.

When performing reproduction of content, it is required to read the data into ECC block units in order to perform the data processing such as performing error correction based on parity in ECC block units.

Performing a jump during data reproduction may require the processing of two different ECC blocks, that is, one ECC block at the jump source and another ECC block at the jump destination. The overhead time related to ECC block processing is assumed to be the overhead time [T _OH ] that occurs when reading the ECC block boundary shown in FIG. 10D .

As described above, execution of the interlayer jump results in the intralayer jump time [T _ACC ] shown in FIG. 10B , the interlayer jump time [T _IL ] shown in FIG. 10C , and the ECC shown in FIG. 10D . The block read overhead time [T _OH ], and thus the overall inter-layer jump time [T _JUMP ] defined as the time during which inter-layer jumps are performed to generate breaks in reading data from the disk, is calculated as follows:

T _JUMP =T _ACC +T _IL +T _OH

Details concerning overhead time of ECC block processing occurring in jump processing are described with reference to FIG. 11 .

As shown in FIG. 11A , the process of reading and reproducing data from the disc first allows data in ECC block units to be read from the disc 521 into the buffer 522 . Furthermore, the data output from the buffer is decoded in the decoding unit 523 . It should be noted that processing such as error correction is performed before decoding, but is not shown in the drawing. The decoding unit 523 performs decoding when performing adjustment of reproduction order and reproduction time in accordance with time stamp information set in a transport stream (TS) contained in in the AV stream data within the ECC block.

The decoding unit 523 can continuously perform reproduction as long as the ECC blocks stored in the buffer exist. The graph in FIG. 11B shows the lapse of the reproduction time and the change in the size of data stored in the buffer 522 .

From the buffer data size measured on the vertical axis, it can be understood that stopping reading data from disk due to jumps will cause the data size to start decreasing, and restarting reading data from disk due to terminating jumps will cause Causes the buffer data size to start increasing. When the buffer data size reaches zero, if the data output from the decoding unit 523 is completed, the reproduction may be interrupted. Thus, it is necessary to set the buffer size so as to prevent the buffer data size from reaching zero.

In one embodiment shown in FIG. 11 , when a layer jump occurs during the processing of an ECC block [S _ECC1 ] 532 contained in data 531 read from the disk, then fetching data from the disk is stopped , in this case, after the pick-up control following the ECC block to the ECC block [S _ECC2 ] 533 at the read start position in the read data 534 specified as jump destination data After a position seek, the ECC block [S _ECC2 ] 533 is fetched, thereby causing data reproduction to be performed by a process of storing in a buffer and decoding.

In this case, error correction and decoding are required for the final ECC block [S _ECC1 ] 532 specified as jump source data, and error correction is required for the first ECC block [S _ECC2 ] 533 specified as jump destination data and decoding, however in this case, not all data generated by these processes are always output as reproduced data.

In the worst case, an invalid data processing time would result where most of the processed data of the two ECC blocks is not available as reproduced data. The time required for invalid data processing is defined as the ECC block read overhead time [T _OH ], as shown in FIG. 10D .

This overhead time [T _OH ] is expressed as follows in the worst case where most stored data consisting of ECC block data specified as jump source data and ECC block data specified as jump destination data cannot be used for reproduction:

T _OH ＝(2×ECC_size)/R _UD

In the above expressions, ECC_size represents the data size of a single ECC block, and R _UD represents the read rate, which corresponds to the transfer rate at which data is output from the buffer 522 to the decoding unit 523 .

Assuming that the ECC block size is 64KB, and the data transfer rate R _UD is 54Mbps, for example, then the overhead time [T _OH ] is calculated as follows:

T _OH ≤(2×64×1024×8)/54/10 ⁶ ＝20 milliseconds

That is, the maximum value of the ECC block read overhead time [T _OH ] is determined to be 20 milliseconds.

The reduction speed of the buffer data size depends on the data recording rate R _TS . Said data recording rate R _TS applies to the rate corresponding to the data consumption involved in the data processing in the decoding unit 523 .

The size of reproduced data contained in a single ECC block is not fixed because there is a difference in compression rate, whereby the size of reproduced data, that is, the reproduced data time varies for each ECC block.

Thus, the reduction speed of the buffer data size does not necessarily reach a constant speed during the occurrence of an inter-layer jump. Referring now to FIG. 12, the reduction of the buffer data size during the occurrence of an inter-layer jump will be described.

FIG. 12A is a graph showing the lapse of reproduction time and changes in the size of data stored in the buffer, like the graph shown in FIG. 11 .

Based on the buffer data size measured on the vertical axis, it can be understood that stopping reading data from disk due to the occurrence of jumps will cause the data size to start decreasing, and restarting reading data from disk due to terminating jumps will cause Causes the buffer data size to start increasing. When the buffer data size reaches zero, if the data output from the decoding unit is completed, the reproduction may be interrupted. Thus, it is necessary to set the buffer size so as to prevent the buffer data size from reaching zero.

In order to specify the maximum buffer size S _RB , it is necessary to assume the reproduction speed of the buffer data size during the jump. However, the reduction speed of the buffer data size does not necessarily reach a fixed speed, as described above.

Thus, if some assumptions are made in order to estimate the reduction speed of the buffer data size in a jump cycle, the buffer size S _RB is determined based on the above assumptions.

Line [1] in the graph shown in FIG. 12A is assumed to be the line obtained by setting the reduction speed of the buffer data size during a jump based on the average rate that can be used for reading and reproducing The disc contains a continuously recorded data area. Line [2] in the diagram is assumed to be the line obtained by setting the reduction rate of the buffer data size during the jump based on the average rate at which the data actually involved in the jump is fetched , not related to the data of the continuously recorded data area contained in the disc, obtained by extracting data based on the reproduction rate. Line [3] in the graph is assumed to be a line obtained by setting based on the maximum recording rate of the recording data, which is set to correspond to the attribute information of the content recorded on the disc.

FIG. 12B is a graph showing assumed velocity values on each of the lines [1], [2], and [3] shown in FIG. 12A. The vertical axis shows the data output bit rate at the time of reproduction, and the horizontal axis shows the reproduction time.

As shown in FIG. 12B, the output bit rate has a relationship of [1]<[2]<[3], and when reproducing the continuously recorded data area in the disc, the output bit rate is close to the output bit rate of the line [1]. The reproduction is performed at the same rate, and when a jump occurs, the reproduction is performed at an output bit rate close to that of the line [2].

Applying the line [1], that is, the average reproduction rate of the continuous recording area contained in the disc, to the reduction speed of the buffer data size during the jump, makes the buffer data size equal to or greater than that obtained by using the line [1] Instead, the speed of the assumed bit rate obtained is reduced, as shown in FIG. 12B, and in the worst case, buffer data is lost, thereby leading to the possibility of intermittent reproduction. Applying the line [2], ie based on the calculated average rate of the reproduction rate during the jump period, can provide an accurate agreement between the applied assumed bit rate and the actual reduction speed of the buffer data. Thus, line [2] can be regarded as the theoretically optimal hypothetical bit rate, but in this case, it is actually difficult to specify the data positions corresponding to the start and end points of the jump period, resulting in the calculation of Difficulties arise when using the assumed bit rate for line [2].

On the contrary, according to the assumption based on the line [3] shown in FIG. 12A , that is, based on the maximum recording rate set to correspond to the attribute information of the content recorded in the disc, the reproduction rate of the recorded data in the disc can be ensured. The rate does not exceed the bit rate of the line [3] shown in FIG. 12B, and even when a jump occurs, reproduction processing at a bit rate exceeding the bit rate of the line [3] does not occur. Also, the bit rate of the line [3] is assumed to be a set value obtained as attribute information at the time of content creation so that acquisition of the bit rate value can be easily realized with reference to the attribute information.

Thus, if it is assumed that reproduction is performed at a bit rate corresponding to the maximum recording rate of line [3], a reduction in buffer data size occurs at the time of jumping, the maximum buffer size S _RB is calculated based on the above assumption.

The Blu-ray Disc standard specifies that data is recorded on the disc as 192-byte packets by adding a 4-byte header to a 188-byte Transport Stream (TS) packet (TS packet recording The rate is denoted as TS_recording_rate). In the case where the data is assumed to be in packets of 192 bytes, the maximum recording rate R _MAX can be expressed as:

R _MAX =(TS_RECORDING_RATE)×192/188.

In reproducing a disc in which data recording is performed in accordance with the Blu-ray Disc standard, reproduction is performed at or below the maximum recording rate R _MAX calculated based on the TS packet size. Thus, when performing rendering involving an inter-layer jump, the buffer size S _RB required to prevent the buffer data from reaching zero during the jump is calculated as follows:

S _RB =R _MAX ×T _JUMP

One embodiment of a setting for ensuring reproduction without data gaps between layer jumps will now be described with reference to FIG. 13 . When establishing the regulations on the data recorded on the disk, it is necessary to determine the allowable inter-layer jump mode, that is, to determine the range that effectively prevents the occurrence of data intermittent jumps, thus in the mode that only allows jumps to occur within a certain range Execute content recording in .

13A to 13C show an embodiment of setting the allowable jump between layers and an embodiment of calculating the overall jump time T _JUMP in the jump processing between layers. As described above, the overall jump time is obtained from the sum of the time T _ACC corresponding to the pickup seek time, the pickup adjustment time T _IL , and the overhead time T _OH due to ECC block processing, i.e. T _JUMP = T _ACC +T _IL +T _OH

Figure 13A shows a pattern applied to the case where a full trip inter-layer jump is allowed in the range from the innermost layer of the first layer to the outermost layer of the second layer, and the overall jump time in this case is given as follows [T _JUMP ]:

T _JUMP ＝1220(T _ACC )+360(T _IL )+20(T _OH )＝1600 milliseconds.

It should be noted that each of the time corresponding to the seek time of the picker [T _ACC ], the settling time of the picker [T _IL ], and the overhead time due to ECC block processing [T _OH ] should be based on the An embodiment is described with reference to FIGS. 10A-10D .

Based on this situation, the determination of the alignment conditions for recording data on the disc can ensure continuous supply of data even if jumps occur between random addresses in the recording medium. On the contrary, however, the jump time should be set to be larger than the jump time of the modes in FIG. 13B and FIG. 13C described later, thus resulting in an increase in the size of the buffer that needs to ensure that data is continuously provided, as later referred to in FIG. 14 as described.

Figure 13B (Case B) shows a pattern applied to a case where an intra-layer jump of half a run and an inter-layer jump of 1/10 a run are established as the maximum jumps allowed turn distance, and the overall jump time T _JUMP in this case is as follows:

(1) Jump within the same layer of half-stroke

T _JUMP ＝990(T _ACC )+0(T _IL )+20(T _OH )＝1010 milliseconds

(2) 1/10 stroke layer jump

T _JUMP = 650(T _ACC ) + 360(T _IL ) + 20(T _OH ) = 1030 milliseconds.

The maximum jump time was determined to be 1030 milliseconds.

This mode is needed to determine the data arrangement condition, if for the intra-layer jump, the jump distance is limited to a range of about [8.2×2 ³⁰ /2048] sectors, and for the inter-layer jump For example, it is limited to the range of [3×2 ³⁰ /2048] sectors, however, in this case, it is necessary to ensure that the buffer size for data continuous supply is smaller than the size of the mode in FIG. 13A , as described above with reference to FIG. 14 .

Figure 13C (Case C) shows a pattern applied to a case where intra-layer jumps of 1/10 run and inter-layer jumps of 40000 sectors are established as the maximum allowed The jump distance, and the overall jump time T _JUMP in this case is as follows:

(1) Jump within the same layer of 1/10 stroke

T _JUMP ＝650(T _ACC )+0(T _IL )+20(T _OH )＝670 milliseconds

(2) Interlayer jump of 40000 sectors

T _JUMP = 330(T _ACC ) + 360(T _IL ) + 20(T _OH ) = 710 milliseconds.

The maximum jump time was determined to be 710 milliseconds.

This mode is needed to determine the data arrangement condition, if for the intra-layer jump, the jump distance is limited to a range of about [1.2×2 ³⁰ /2048] sectors, and for the inter-layer jump However, in this case, it is necessary to ensure that the size of the buffer where data is continuously provided is smaller than that of the patterns of FIGS. 13A and 13B , as described above with reference to FIG. 14 .

FIG. 14 is a view for illustrating a method of determining a continuous data arrangement condition applicable to a data recording rate value with respect to a jump time. The allowable minimum reproduction time (t) corresponding to the smallest data unit to be set consecutively in the disc is determined based on the overall jump time T _JUMP , the rate R _UD of reading data from the disc in the drive, and the maximum recording rate R _MAX calculate. A value calculated by multiplying the data read rate R _UD by the allowable minimum reproduction time [t] of data set consecutively is taken as the continuous data arrangement size U _size . That is, U _size =R _UD ×t. The details of the process of calculating the continuous data arrangement size U _size are described.

In FIG. 14, the horizontal axis shows the reproduction time, and the vertical axis shows the data size read from the disc and the reproduced data size. A solid line indicates a change in the data size 601 read from the disc with the lapse of reproduction time, and a broken line shows a change in the reproduction data size 602 with the lapse of reproduction time.

The difference between the read data size 601 and the reproduced data size 602 corresponds to the buffer data size 603 . The reproduction data size 602 should allow reproduction of data of a fixed size as the reproduction time elapses, specifically, the reproduction data size 602 increases in proportion to the time as shown in FIG. 14 .

Conversely, in terms of the read data size 601, when a jump occurs, the reading of data from the disk is stopped, so the read data size 601 stops increasing, while for reading a contiguous data storage area that does not involve a jump For processing, data reading is performed at a fixed reading rate, for example, at a rate of 54 Mbps.

The difference between the read data size 601 and the reproduced data size 602 shown in FIG. If the device data size 603 does not reach the setting of zero or less, then seamless playback can be performed without any playback interruption during skip playback.

When the read data size 601 and reproduced data size 602 are fixed, it is possible to increase the difference specified as the read data size 601 and reproduced data size 602 only by increasing the value of U _size shown in FIG. 14 . Value buffer data size 603.

U _size shown in FIG. 14 corresponds to the data size applied to continuous reading in the disk without involving jump processing. This data size is referred to as the continuous data arrangement size U _size .

_{The allowable} minimum reproduction _time [t ]. The formula is, t=T _JUMP ×R _UD /(R _UD −R _MAX ).

If the data has been recorded on the disc as data blocks corresponding to the minimum reproduction time [t] or more allowed for continuous data, the buffer data tends not to reach 0 or Hereinafter, continuous reproduction can be ensured thereby.

A value calculated by multiplying the maximum recording rate R _MAX by the minimum reproduction time [t] allowed for continuous data that has been calculated according to the above expression is taken as the continuous data arrangement size U _size . That is, U _size =R _MAX ×t.

If the data has been recorded on the disc as data blocks corresponding to the continuous data arrangement size U _size or more, the buffer data will often not reach 0 or less when a jump occurs, thereby Continuous reproduction can be ensured.

An embodiment of calculating the continuous data arrangement size U _size is specifically described. Assume that the overall jump time T _JUMP , the rate R _UD of reading data from the disk of the drive, and the maximum recording rate R _MAX obtain the following values:

T _JUMP [msce]: intra-layer access time T _ACC + inter-layer jump time T _IL + overhead time T _OH due to said ECC block boundary

R _UD [×10 ⁶ bps]: read rate＝54Mbps

RMAX[×10 ⁶ bps]: maximum recording rate (TS_recording_rate×192/188)

Then, calculation is performed on t[msec] specified as the allowable minimum reproduction time of _continuous data and U _size [×220 bytes] specified as the continuous data arrangement size.

The allowable minimum reproduction time [t] of continuous data and the continuous data arrangement size U _size are calculated as follows:

t(msec)=T _JUMP ×R _UD /(R _UD -R _MAX ), and

U _size (byte)＝t/1000×R _MAX /8.

By applying the above expression to the pattern shown in Fig. 13B, i.e. in the case of T _JUMP = 1030 milliseconds, the calculation of the continuous data arrangement size U _size will produce the following result:

U _size (bytes) = 20.6 megabytes if R _MAX = (TS_recording_rate x 192/188) = 40 megabits per second (Mbps).

That is, in the case of the pattern shown in FIG. 13B, that is, when T _JUMP = 1030 milliseconds is determined as the maximum jump time, the following conditions need to be satisfied for recording data onto the disc. The continuous data arrangement size U _size = 20.6 megabytes. That is, it is required to record data by setting the continuous data arrangement area to 20.6 megabytes or more.

As described above, the allowable minimum reproduction time [t] of continuous data and the continuous data arrangement size U _size are calculated as follows:

t(msec)=T _JUMP ×R _UD /(R _UD -R _MAX ), and

U _size (byte)=t/1000×R _MAX /8.

Thus, when the maximum jump time T _JUMP is set considerably, both the allowable minimum reproduction time [t] and the continuous data arrangement size U _size need to be set considerably, thereby requiring the buffer size to be set considerably .

Fig. 15 is a table which lists the data arrangement condition (the minimum value of the continuous data arrangement size) according to each of the jump patterns A to C which have been described with reference to Figs. 13A to 13C, the data arrangement condition The conditions correspond to the values of the maximum recording rate R _MAX and the buffer size S _RB required to ensure continuous supply of data using the calculation method already described with reference to FIG. 14 .

As described above with reference to FIGS. 13A to 13C , FIG. 13A (Case A) shows a mode applied to the case where inter-layer jumps are allowed for all trips in the range from the innermost side of the first layer to the outermost side of the second layer, And the overall jump time T _JUMP given in this case is as follows:

T _JUMP ＝1220(T _ACC )+360(T _IL )+20(T _OH )＝1600 milliseconds

In this case, the required buffer size S _RB is assumed to be 9.36 megabytes (Mbytes), and the data arrangement conditions corresponding to each value of the maximum recording rate R _MAX (minimum value):

R _MAX = 5×192/188 megabits per second -> continuous data arrangement size U _size = 1.1 megabytes

R _MAX = 10×192/188 megabits per second --> continuous data arrangement size U _size = 2.4 megabytes

R _MAX = 20×192/188 megabits per second -> continuous data arrangement size U _size = 6.3 megabytes

R _MAX = 30×192/188 megabits per second -> continuous data arrangement size U _size = 13.6 megabytes

R _MAX = 40×192/188 megabits per second -> continuous data arrangement size U _size = 32.0 megabytes

R _MAX =48×192/188 megabits per second -> continuous data array size U _size =101.5 megabytes.

Figure 13B (Case B) shows a pattern applied to a case where an intra-layer jump of half a run and an inter-layer jump of 1/10 a run are established as the maximum jumps allowed turn distance, and the overall jump time T _JUMP in this case is as follows:

(1) Jump within the same layer of half-stroke

T _JUMP =990(T _ACC )+0(T _IL )+20(T _OH )=1010 milliseconds;

(2) 1/10 stroke layer jump

T _JUMP = 650(T _ACC ) + 360(T _IL ) + 20(T _OH ) = 1030 milliseconds.

From this, the maximum jump time was determined to be 1030 milliseconds.

In this case, the required buffer size S _RB is assumed to be 6.02 megabytes, and the data arrangement condition (minimum value of the continuous data arrangement size) corresponding to each value of the maximum recording rate R _MAX is given as follows :

R _MAX = 5×192/188 megabits per second -> continuous data arrangement size U _size = 0.7 megabytes

R _MAX = 10×192/188 megabits per second -> continuous data arrangement size U _size = 1.6 megabytes

R _MAX = 20×192/188 megabits per second -> continuous data arrangement size U _size = 4.1 megabytes

R _MAX = 30×192/188 megabits per second -> continuous data arrangement size U _size = 8.7 megabytes

R _MAX = 40×192/188 megabits per second -> continuous data arrangement size U _size = 20.6 megabytes

R _MAX =48×192/188 megabits per second -> continuous data array size U _size =65.3 megabytes.

Figure 13C (Case C) shows a pattern applied to a case where intra-layer jumps of 1/10 run and inter-layer jumps of 40000 sectors are confirmed as the maximum allowed The jump distance, and the overall jump time T _JUMP in this case is as follows:

(1) Jump within the same layer of 1/10 stroke

T _JUMP ＝650(T _ACC )+0(T _IL )+20(T _OH )＝670 milliseconds;

(2) Interlayer jump of 40000 sectors

T _JUMP = 330(T _ACC ) + 360(T _IL ) + 20(T _OH ) = 710 milliseconds.

From this, the maximum jump time was determined to be 710 milliseconds.

In this case, the required buffer size S _RB is assumed to be 4.15 megabytes, and the data arrangement condition (minimum value of the continuous data arrangement size) corresponding to each value of the maximum recording rate R _MAX is given as follows :

R _MAX = 5×192/188 megabits per second -> continuous data arrangement size U _size = 0.5 megabytes

R _MAX = 10×192/188 megabits per second -> continuous data arrangement size U _size = 1.1 megabytes

R _MAX = 20×192/188 megabits per second -> continuous data arrangement size U _size = 2.8 megabytes

R _MAX = 30×192/188 megabits per second -> continuous data arrangement size U _size = 6.0 megabytes

R _MAX = 40×192/188 megabits per second -> continuous data arrangement size U _size = 14.2 megabytes

R _MAX =48×192/188 megabits per second -> continuous data arrangement size U _size =45.1 megabytes.

As mentioned above, both the buffer size and the minimum value of the continuous data arrangement size can be reduced as the jump time decreases in the order of case A -> case B -> case C. The advantage of reducing the size of the buffer can lead to a cost reduction effect of the reproduction device. The advantage of reducing the minimum value of the continuous data arrangement size enables seamless connection in smaller structural units and smaller reproduction units even when AV streams of the same rate are given, thereby leading to the effect of an increased degree of freedom of editing.

A data arrangement of a browsable slideshow that continuously switches and outputs still images and further reproduces and outputs audio data will now be described. A browsable slide show is required to reproduce the data by alternately jumping between clip data of a clip of image data containing the image data and clip data of a clip of audio data, wherein the clip of image data contains the image data and the clip of audio data Said audio data is contained, as already described with reference to FIG. 1 .

For example, the reproduction operation of the browsable slideshow is performed by the following processes (a) and (b):

(a) When the user operation is not considered, the reproduction process of the audio data is continuously performed in accordance with the slide show being displayed, and

(b) When the user gives an operation to display the next slide, after reading the data of one slide of the main TS, return to the continuous reading state of the audio TS. Then, the next slide is displayed on the display, thereby continuing the process of reproducing the audio.

As shown in FIG. 16, in a configuration in which a disk 702 is mounted in a spindle motor 701, in the case where a main TS 703 containing image data usable for generating the slideshow and an audio TS 704 containing audio data are both included Next, data reproduction is performed according to alternately jumping between the storage areas of the main TS 703 and the audio TS 704, that is, a slide show can be browsed.

That is, there needs to be pre-stored audio data of sufficient size in a buffer available for storing audio data to allow audio reproduction to continue during processing [jump -> read data for one slide -> jump] data.

FIG. 16 shows an embodiment applied to when each of the main TS and the audio TS is contained in a disc of the same layer, and has a configuration in such a form that it is possible to perform alternate reading when jumping within a layer. . As described above, alternate reading of the main TS and audio TS separately contained in the disc of the same layer is performed as follows.

(1) Data of a predetermined size x is read from the main TS.

(2) Execute a jump to the specified data position of the audio TS.

(3) Read data of a predetermined size y from the audio TS.

(4) A jump is performed to a prescribed data position of the main TS.

Then, data of a predetermined size x is read from the main TS.

As described above, the data size x read from the above-mentioned main TS per read operation is assumed to be the minimum value of the size RB1 of the main TS read buffer 333 (see FIGS. 4 and 6 ). In addition, the data size y read from the above audio TS per read operation is assumed to be the minimum value of the size RB2 of the audio TS read buffer 334 . An expression applied to calculate the size required for each of the main TS read buffer 333 and the audio TS read buffer 334 is given below:

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; JUMP</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; )</span>$

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; JUMP</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; Eq</span>}<span\; class="notranslate">\; .</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ]</span>$

in:

RB1: the required size of the main TS read buffer 333 >= the data size read from the main TS for each read action

RB2: the required size of the audio TS read buffer 334 >= the data size read from the audio TS for each read operation

T _JUMP : jump time

R _UD : bit rate for reading from drive

R _MAX1 : The bit rate of the source packet stream of the main TS (maximum read bit rate)

R _MAX2 : bit rate of source packet stream of audio TS (maximum read bit rate))

For example, under the following conditions, namely:

Read rate from drive R _UD = 54 Mbits per second,

Jump time T _JUMP = 1.01 seconds,

The bit rate R _MAX1 (maximum read bit rate) of the source packet stream of the main TS = 15 Mbits per second, and

The bit rate R _MAX2 (maximum read bit rate) of the source packet stream of the audio TS = 2.0 megabits per second, the required size of the main TS read buffer 333 results in x = 3.90 megabytes, while the audio TS read buffer 334 The required size results in y = 0.698 megabytes.

Among the above parameters, the bit rate R _UD for reading from the drive, the bit rate R _MAX1 of the source packet stream of the main TS, and the bit rate R _MAX2 of the source packet stream of the audio TS can be basically determined according to the drive device, reproduction process However, the jump time T _JUMP is considered as a value that changes depending on the jump distance or the like performed on the disk. The above-described embodiments have given examples based on the assumption that the jump time T _JUMP is 1.01 seconds. In this case, however, this value is limited to a value temporarily set by some jump processing, and the jump time T _JUMP should be changed depending on the jump distance or the like performed on the disc.

The buffer data size calculated based on the above becomes insufficient to satisfy the case where the jump time T _JUMP increases as the distance or the like of jumps performed on the disc increases, thereby causing the possibility of discontinuity in data reproduction. Therefore, it is necessary to specify the data arrangement so that the jump time T _JUMP is limited to a certain time or less, thereby performing data recording in accordance with the prescribed format of the data arrangement. Then, data recording in accordance with the above-mentioned format enables seamless reproduction, whereby data is not interrupted.

One embodiment of a setup that ensures browsable slide show reproduction without data gaps is now described with reference to FIG. 17 . When establishing the regulation on the data to be recorded on the disc, it is necessary to determine the allowable jump mode, that is, to determine the jump range which effectively prevents the occurrence of data discontinuity, thereby performing in the mode which allows the jump to occur only within the determined range content record.

FIG. 17 shows one embodiment of setting the jump-allowed mode and one embodiment of calculating the overall jump time T _JUMP involved in the jump process. As described above, the overall jump time is obtained as the sum of the time T _ACC corresponding to the picker seek time, the picker adjustment time T _IL when performing an inter-layer jump, and the overhead time T _OH due to ECC block processing , that is, T _JUMP =T _ACC +T _IL +T _OH .

The embodiments shown in FIGS. 17A to 17C are applied to the case where the main TS specified as image data and the audio TS specified as audio data are arranged in a configuration form that can be alternately read when jumping within a layer. Contains discs in the same layer, if jumping between layers is prohibited during a browsable slideshow.

Figure 17A shows a pattern (case D) applied to a case where layer jumps are allowed for full trips in the range from the innermost to the outermost, and the overall jump time in this case T _JUMP is as follows:

T _JUMP ＝1220(T _ACC )+0(T _IL )+20(T _OH )＝1240 milliseconds.

It should be noted that each of the time T _ACC corresponding to the pickup seek time, the pickup adjustment time T _IL , and the overhead time T _OH due to ECC block processing is based on what has been described with reference to FIGS. 10A to 10D Example.

Determination of the alignment conditions for recording data to the disk based on this situation can ensure continuous supply of data even if the jump occurs between random addresses in the recording medium. Conversely, however, the jump time should be set to be greater than the time of the modes in FIGS. 17B and 17C described later, thereby resulting in an increase in the buffer size required to ensure continuous supply of data, as later referred to in FIG. 18 as described.

FIG. 17B shows a pattern (case E) applied to a case where an intra-layer jump of half-stroke T _IL is established as the maximum jump distance allowed, and in this case The overall jump time T _JUMP is as follows:

T _JUMP =990(T _ACC )+0(T _IL )+20(T _OH )=1010 milliseconds.

From this, the maximum jump time was determined to be 1010 milliseconds.

This mode is required to determine the data arrangement condition under the condition that the jump distance is limited such that the maximum jump time in the intra-layer jump reaches 1010 milliseconds or less, however in this case, data continuity is ensured Provided that the required buffer size will be smaller than that of the mode of FIG. 17A , as described with reference to FIG. 18 .

Figure 17C shows a pattern (case F) applied to a case where an intra-layer jump of 1/3 run is established as the maximum jump distance allowed, and in this case The overall jump time T _JUMP is as follows:

T _JUMP =880(T _ACC )+0(T _IL )+20(T _OH )=900 milliseconds.

From this, the maximum jump time was determined to be 900 milliseconds.

This mode is required to determine the data arrangement condition under the condition that the jump distance is limited such that the maximum jump time in the intra-layer jump reaches 900 milliseconds or less, however in this case, data continuity is ensured Provided that the required buffer size will be smaller than the pattern buffer size of FIGS. 17A and 17B , as described with reference to FIG. 18 .

Figure 18 is a table listing the buffer sizes obtained by calculating the required buffer sizes, that is:

RB1: the required size of the main TS read buffer 333 >= the data size read from the main TS for each read action, and

RB2: the required size of the audio TS read buffer 334 >= the data size read from the audio TS for each read operation

The above results are in accordance with the case of the skip mode of case D-F which has been described with reference to FIG. 17A to FIG. given by the above mathematical expression (Eq. 1).

The above calculation should be performed on the condition that the bit rate R _MAX1 of the source packet stream of the main TS is assumed to be R _MAX1 = (192/188) × 15 Mbits per second, and the bit rate R _MAX2 of the source packet stream of the audio TS is assumed to be Assume that R _MAX2 = (192/188) x 2.0 Mbits per second.

It should be noted that (192/188) in the above expression is assumed to be a value obtained in consideration of the header information size in each TS.

Case A shows a pattern applied to the case where full trip interlayer jumps are allowed in the range from the innermost side of the first layer to the outermost side of the second layer, and as described above with reference to FIG. 13A , in this case given The overall jump time T _JUMP is as follows:

T _JUMP = 1220(T _ACC ) + 360(T _IL ) + 20(T _OH ) = 1600 milliseconds.

In this case, the required size of each buffer is as follows:

The minimum size (RB1) required for the main TS read buffer 333: x = 6.17 megabytes, and

Minimum size (RB2) required for audio TS read buffer 334: y=1105K bytes.

Thus, this gives the overall buffer size [RB1+RB2] = 7.28 megabytes.

Case D shows a pattern applied to a case where intra-same-level jumps for the full trip are established as the maximum jump distance allowed, and the overall jump time in this case is [ T _JUMP ] as follows:

T _JUMP =1220(T _ACC )+0(T _IL )+20(T _OH )=1240 milliseconds.

From this, the maximum jump time was determined to be 1240 milliseconds.

In this case, the required size of each buffer is as follows:

The minimum size (RB1) required for the main TS read buffer 333: x = 4.79 megabytes, and

Minimum size (RB2) required for audio TS read buffer 334: y=857K bytes.

Thus, this gives the overall buffer size [RB1+RB2] = 5.64 megabytes.

Case E shows a pattern applied to a case where an intra-layer jump of a half-stroke is established as the maximum jump distance allowed and the overall jump time T _JUMP is as follows:

T _JUMP =990(T _ACC )+0(T _IL )+20(T _OH )=1010 milliseconds.

From this, the maximum jump time was determined to be 1010 milliseconds.

In this case, the required size of each buffer is as follows:

The minimum size (RB1) required for the main TS read buffer 333: x=3.90 Mbytes, and the minimum size (RB2) required for the audio TS read buffer 334: y=698 Kbytes.

Thus, this gives the overall buffer size [RB1+RB2] = 4.60 megabytes.

Case F shows a pattern applied to a case where an intra-layer jump of 1/3 run is recognized as the maximum allowed jump distance, and the overall jump distance in this case The time T _JUMP is as follows:

T _JUMP =880(T _ACC )+0(T _IL )+20(T _OH )=900 milliseconds.

From this, the maximum jump time was determined to be 900 milliseconds.

In this case, the required size of each buffer is as follows:

The minimum size (RB1) required for the main TS read buffer 333: x = 3.48 megabytes, and

Minimum size (RB2) required for audio TS read buffer 334: y=622K bytes.

Thus, this gives the overall buffer size [RB1+RB2] = 4.10 megabytes.

As mentioned above, the minimum value of the buffer size may decrease as the jump time decreases in the order of case A->case D->case E->case F. The advantage of reducing the size of the buffer can lead to a cost reduction effect of the reproduction device.

15 and 18, which show the buffer sizes required for each mode of inter-layer jump and intra-layer jump, it can be understood that the inter-clip ) and each of the browsable slideshows using a different jump pattern can reduce the buffer size as required by the BD-ROM reproduction system.

For example, the mode shown as case C in FIG. 15 is applied to the seamless connection of inter-layer clips and the mode shown as case E in FIG. seconds, and TS_recording_rate of the main TS = 15 Mbits per second), it is possible to reduce the buffer size required in the BD-ROM reproduction system to 4.60 Mbytes.

19A to 19C are views for illustrating data arrangement conditions of clip #1 and clip #2, where clip #1 is used for the main TS (image data) and clip #2 is used for the audio TS (the audio data) , for executing the browsable slide show required to apply the case of the jump mode of case D to case F which has been described with reference to FIG. 18 .

As described above with reference to the reproduction mode of the browsable slide show, in reproducing the audio TS, the process of [jump -> read one slide data -> jump] occurs from a random position. Thus, each of the main TS and audio TS should be set in a continuous area, and the entire area including the main TS and audio TS should fall within the range of the maximum jump distance (D _MAX in the drawing) , the range is suitable for cases D to F.

Clip #1 shown in FIGS. 19A and C corresponds to a clip of image data contained in a clip of a content data file that has been described with reference to FIG. 1, and the clip #2 corresponds to the audio data. clip. The browsable slide show should execute the reproduction process by reading clips #1 and #2 alternately.

Playlist #1 has the program configuration shown in FIG. 19B , for example, in the form of a list in which a prescribed order of clips to be reproduced is established. Thus, in the case of performing reproduction based on PlayList #1 shown in FIG. 19B , for example, reproduction of Clip #2 should follow reproduction of content in Clip #1. In this case, jump processing occurs when clips within the range of clip #1 to clip #2 are not contained in the continuous area of the disc.

In the case of performing jump processing, data recording needs to be performed by dividing each clip data so that the jump distance is limited to be smaller than the maximum allowable jump distance.

In each jump pattern of case D to case F which has been described with reference to FIG. 18, the data arrangement condition is set as shown in FIG. 2 ensures seamless reproduction in the event of jumps between clips in the browsable slide show performed.

To ensure seamless reproduction during reproduction of a browsable slide show, the entire region containing the main TS and audio TS should fall within the range of the maximum jump distance (D _MAX in the figure), which is suitable for cases D to Situation F. Thus, data arrangement conditions for seamless reproduction in a browsable slide show need to satisfy the following two conditions:

(1) Main TS size (S _MAIN )+(audio TS size)(S _SUB )≦D _MAX , and

(2) All data of the main TS and audio TS should be continuously arranged within the range of the maximum jump distance D _MAX .

[4. Content recording and reproduction processing]

The configuration of a data processing device that performs the above-described data processing will now be described with reference to FIG. 20 . The data processing apparatus of the present invention can be utilized as a data processing apparatus that determines, for the information recording medium, the structural form of recorded data including image data clips with image data and audio files with audio data. Data clips for use in browsable slide shows that perform audio reproduction processing in parallel with continuous reproduction of still images. Described data processing equipment comprises allowable jump range determining means 751, required jump time calculating means 752, buffer size determining means 753, data arrangement determining means 754 and data recording means 755, and executes data writing information recording medium 756.

The allowable jump range determination means 751 executes a process of determining an allowable range of each of intra-same-layer jumps and inter-layer jumps, which are performed during reproduction processing of an information recording medium. For example, a process of setting one of the skip modes already described with reference to FIGS. 13 and 17 is included.

The required jump time calculating means 752 calculates the time required for each of the intra-layer jump and the inter-layer jump based on the allowed jump range information determined by the allowed jump range determining means 751 .

In terms of jump time required for jumping within the same layer, said required jump time calculating means 752 calculates the sum of the seek time of the pickup and the overhead time related to the processing of reading the data unit block of the information recording medium, and In terms of the required jump time for jumping between layers, the sum of the seek time of the pickup, the adjustment time of the pickup related to the seek between layers, and the overhead time related to the process of reading the data unit block of the information recording medium is calculated .

The buffer size determining means 753 determines the size of the image data buffer and the size of the audio data buffer containing the audio data based on the required jump time calculated by the required jump time calculating means 752, wherein The image data buffer contains image data read from an information recording medium. Calculation performed by applying the above expression [Eq. 1] is included in the determining step.

The data arrangement determining means 754 determines the data arrangement so that the image data clips and audio data clips applied to the browsable slide show are recorded within the allowable jump range calculated by the allowable jump range determining means 751 . Specifically, as described above with reference to FIG. 19 , the data size S _MAIN of the image data clip applied to the browsable slide show and the data size S _SUB of the audio data clip are calculated, and when calculated by the allowable jump range determining means 751 When the value D _MAX is obtained by jumping the allowable range, it is determined to comply with the data arrangement form of the setting, and the setting satisfies the following conditions (a) and (b):

(a) S _MAIN + S _SUB ≤ D _MAX , and

(b) The image data clips and audio data clips should be arranged consecutively within the range of size D _MAX .

The data recording means 755 performs data recording to the information recording medium 756 in accordance with the data arrangement form determined by the above-mentioned data arrangement determining means 754 .

Referring now to FIG. 21, the sequence of the data processing method of the present invention will be described. The data processing of the present invention can be utilized as a data processing that determines an arrangement form of recording data including image data clips with image data and audio data clips with audio data for the information recording medium , for a browsable slide show that performs audio reproduction processing in parallel with continuous reproduction of still images.

First, in step S101, an allowable range of a jump performed in a reproduction process for an information recording medium is determined. For example, a process of setting one of the skip modes already described with reference to FIG. 13 or 17 is included.

Then, in step S102, the required jump time is calculated. The time required for each of the intra-layer jump and the inter-layer jump is calculated based on the allowed jump range information determined in step S101.

Specifically, the sum of the seek time of the pickup and the overhead time related to the processing of reading the data unit block of the information recording medium is calculated as the jump time required for jumping within the same layer, and the seek of the pickup is calculated Time, pickup adjustment time related to inter-layer seek, and overhead time related to the process of reading data unit blocks of the information recording medium and as required jump time for inter-layer jump.

In step S103, the size of the image data buffer and the size of the audio data buffer containing the audio data are determined based on the required jump time calculated in step S102, wherein the image data buffer contains information from Image data read from the recording medium. Calculation performed by applying the above-mentioned expression (mathematical expression 1) is included in the determining step.

In step S104, the data arrangement is determined so that image data clips and audio data clips contained in the information recording medium for a browsable slide show are set within an allowable jump range of Calculated in the step of determining the allowable jump range in step S101.

Specifically, as described above with reference to FIG. 19, the data size S _MAIN of the image data clip applied to the browsable slide show and the data size S _SUB of the audio data clip are calculated, and when the allowable jump calculated in the allowable jump range determining step When the jump range obtains the value D _MAX , it is determined to comply with the data arrangement form of the setting, and the setting satisfies the following conditions:

S _MAIN + S _SUB < D _MAX

In step S105, data recording to the information recording medium is performed in accordance with the data arrangement form determined in step S104 specified as the data arrangement determining step.

The above-described processing enables seamless continuous reproduction without any data gap even if a jump occurs during reproduction of the content contained in the information recording medium. Specifically, when jump processing occurs during reproduction of a browsable slide show in which audio reproduction processing is performed in parallel with continuous reproduction of still images, continuous reproduction can be seamlessly performed without any Data gaps.

[5. Configuration that can flexibly set the reading rate]

In the above description, in which the description relates to [2. Browsable slideshow], [3. Jump processing and content storage format], and [4. Content recording and reproduction processing], when reproducing still images together with audio During the browsable slideshow of , the configuration for safely performing reproduction processing without data gaps when jump processing occurs has been explained. In the above processing example, an example has been described in which the audio TS read (reproduction) rate R _TS2 and the main (image) TS read (reproduction) rate R _TS1 are basically set as a combination of fixed values. Hereinafter, a configuration in which these reading rates R _TS1 and R _TS2 can be flexibly set will be described.

A browsable slide show is required to reproduce the data by alternately jumping between clip data of a clip of image data containing the image data and clip data of a clip of audio data, wherein the clip of image data contains the image data and the clip of audio data The audio data is contained, as already described.

For example, the reproduction operation of the browsable slideshow is performed by the following processes (a) and (b):

(a) When the user operation is not considered, the reproduction process of the audio data is continuously performed along with the slide show being displayed, and

(b) When the user gives an operation to display the next slide, after reading the data of one slide of the main TS, return to the continuous reading state of the audio TS. Then, the next slide is displayed on the display, thereby continuing the process of reproducing the audio.

As described with reference to FIG. 16, in the configuration in which the disc 702 is mounted in the spindle motor 701, for example, in the main TS 703 containing image data usable for generating the slideshow and containing audio data with audio data. In the case of the TS 704, data reproduction, i.e. browsing slide shows, is performed using alternate jumps between the memory areas of the main TS 703 and audio TS 704.

That is, it is necessary to pre-store audio data having a sufficient size in a buffer available for storing audio data so as to allow the Reproduction of audio data continues. The order in which a browsable slide show is processed is as follows:

(1) Data of a predetermined size x is read from the main TS.

(2) Execute a jump to the specified data position of the audio TS.

(3) Read data of a predetermined size y from the audio TS.

(4) A jump is performed to a prescribed data position of the main TS. Then, data of a predetermined size x is read from the main TS.

As described above, the data size x read from the above-mentioned main TS per read operation is assumed to be the minimum value of the size RB1 of the main TS read buffer 333 (see FIGS. 4 and 6 ). Also, the data size y read from the above audio TS per read operation is assumed to be the minimum value of the size RB2 of the audio TS read buffer 334 . In the embodiment described above, the expression applied to calculate the size required for each of the main TS read buffer 333 and the audio TS read buffer 334 is Equation 1:

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; JUMP</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; )</span>$

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="RB"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; ></span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="2"\; label="R\; MAX"\; filenames="C200510078868E00831.png,C200510078868E00931.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; JUMP</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; Eq</span>}<span\; class="notranslate">\; .</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ]</span>$

in:

RB1: the required size of the main TS read buffer 333 >= the data size read from the main TS for each read operation,

RB2: the required size of the audio TS read buffer 334 >= the data size read from the audio TS for each read operation

T _JUMP : jump time,

R _UD : bit rate for reading from the drive,

R _MAX1 : the bit rate of the source packet stream of the main TS (maximum read bit rate), and

R _MAX2 : The bit rate of the source packet stream of the audio TS (maximum read bit rate).

The expression [Eq.1] is consistent with the above-mentioned formula 1.

It should be noted that the relationship between R _MAX1 , R _MAX2 and R _TS1 , R _TS2 is as follows:

R _MAX1 =R _TS1 ×(192/188), and

R _MAX2 =R _TS2 ×(192/188).

The relationship between R _MAX1 , R _MAX2 and R _TS1 , R _TS2 will be precisely described. As described above with reference to FIGS. 3 and 5 , the main player (for image data) (BDAV MPEG2 TS player_1) 335 inputs D source packet data read from the main TS read buffer 333 at the bit rate R _MAX1 . The R _MAX1 indicates the bit rate of the source packet stream in the main TS file.

The source depacketization unit 371 (see FIG. 5 ) of the main player (for image data) 335 receives data at the bit rate R _MAX1 , and performs depacketization processing on the source packet according to the count value of the arrival time clock counter 372, so that The processed data is output from the source unpacketization unit 371 at bit rate R _TS1 .

In other words, the source packet stream of the main TS file is input to the main player (for image data) (BDAV MPEG2 Player_1) 335 from the main TS read buffer 333 shown in _FIG . processing to output data on a 188-byte basis at the bit rate R _TS1 from the main player (for image data) 335 shown in FIG. 4 .

This also applies to audio TS files constituting the audio data. _The source packet stream is input as data on a 192-byte basis from the audio TS read buffer 334 shown in _FIG . 188 byte-based data. Therefore, the relationship between R _MAX1 , R _MAX2 and R _TS1 , R _TS2 is as follows:

R _MAX1 =R _TS1 ×(192/188), and

R _MAX2 =R _TS2 ×(192/188).

Under the various conditions set in Equation 1, that is, assuming that the read rate R _UD for reading from the drive is 54 megabits per second, the jump time T _JUMP is 1.01 seconds, the source packet stream of the main TS The bit rate R _{TS1 of} is 15 megabits per second, and the bit rate R _TS2 of the audio TS source packet stream is 2.0 megabits per second, then the required size of the obtained main TS read buffer 333 is x=3.90 megabytes , and the required size of the audio TS read buffer 334 is y=0.698 megabytes, so the required buffer size of the reproducing device can be determined. It should be noted that in determining the above-mentioned buffer size, the relational expressions R _MAX1 =R _TS1 ×(192/188) and R _MAX2 =R _TS2 ×(192/188) are assumed.

Although Equation 1 uses R _MAX1 and R _MAX2 for the expression, the buffer size can be determined based on the setting of R _TS1 and R _TS2 or the setting of R _MAX1 and R _MAX2 because R _MAX1 , R _MAX2 and R _TS1 , R _TS2 have a relationship in which one can be determined based on the other.

Thus, as described above, in determining the buffer size using Equation 1, a process is performed based on the assumption of a fixed read rate of image and audio data, which is the bit rate of the source packet stream of the main TS: R _TS1 = 15 Mbits per second, while the bit rate of the source packet stream of the audio TS: R _TS2 = 2.0 Mbits per second.

However, some contents stored in an information recording medium may require higher quality audio data to be reproduced. If high-quality audio data is reproduced, such as multi-channel surround data requiring 6-channel or 8-channel or LPCM data as uncompressed data, the above-mentioned R _TS2 = 2.0 megabits per second is not enough for audio TS reading (reproduction) rate, but need to reproduce data at a read rate of 10-30 megabits per second.

In the above-mentioned example of the process, although the calculation process has been described in which the buffer size required for intermittent reproduction of data without generating data during a browsable slide show is performed at a fixed read rate of image data and audio data, Hereinafter, a configuration will be described in which the overall buffer size [RB1+RB2] of the reproducing device is fixed and the reading rate of audio data is variable so as to enable high-quality audio data reproduction. It should be noted that the configuration described below is a configuration in which not only the reading rate of audio data but also that of the main TS, that is, image data is variable.

Rewriting Equation 1 with the overall buffer size [RB1+RB2] yields the following expression [Equation 2]:

$\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 4</span>}{\mathrm{<span\; class="notranslate">\; TR</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; UD</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">R</figure-callout></span><figure-callout\; id="1"\; label="R\; MAX"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; MAX</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="RB"\; filenames="C200510078868E00741.png,C200510078868E00761.png"\; state="\{\{state\}\}">RB</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; RB</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; Eq</span>}<span\; class="notranslate">\; .</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; ]</span>$

As can be seen from Equation 2 above, even when the overall buffer size is fixed as [RB1+RB2], there is a maximum read rate R _MAX1 of the image data contained in the recorded data and contained in the recorded data A large number of combinations of the maximum reading rate R _MAX2 of audio data, both of which satisfy Equation 2.

While Equation 2 uses R _MAX1 and R _MAX2 for the expression, as described above, R _MAX1 , R _MAX2 and R _TS1 , R _TS2 have a relationship where one can use the relational expression to determine the other, The relational expressions R _MAX1 =R _TS1 ×(192/188) and R _MAX2 =R _TS2 ×(192/188), as can be seen from Equation 2, even at the overall buffer size [RB1+RB2 ] is fixed, there are a large number of combinations of R _MAX1 and R _MAX2 , both of which satisfy Equation 2. Therefore, a large number of combinations of the audio TS read (reproduction) rate R _TS2 and the main (image) TS read (reproduction) rate R _TS1 , both of which satisfy Formula 2, are generated.

Applying a combination of the audio TS read (reproduction) rate R _TS2 and the main TS read (reproduction) rate R _TS1 satisfying Formula 2 enables a browsable slide show without data gaps to be executable in the reproduction device.

Hereinafter, a specific example of setting the audio data read rate R _TS2 and the image data read rate R _TS1 will be described. Hereinafter, two processing examples (A) and (B) will be described sequentially.

(1) Processing Example A

Referring to Fig. 22, processing example A is described. The process example A is a process of calculating a combination of the image data read rate R _TS1 and the audio data read rate R _TS2 satisfying Formula 3 by directly employing Formula 2. FIG. 22A shows a graph of the relationship between rates satisfying Equation 2. FIG. In the graph, the horizontal axis shows the image data read rate R _TS1 Mbit/s, and the vertical axis shows the audio data read rate R _TS2 Mbit/s. The combination of R _TS1 and R _TS2 is determined so as to satisfy Equation 1.

In FIG. 22B , the horizontal axis shows the image data read rate R _TS1 megabits per second, and the vertical axis shows the overall buffer size [RB1+RB2] megabytes. In the processing example, the overall buffer size [RB1+RB2] megabytes is set to a fixed value of 6.05 megabytes.

In the case of the overall buffer size [RB1+RB2] = 6.05 megabytes, the combination of the image data read rate R _TS1 Mbit/s and the audio data read rate R _TS2 Mbit/s satisfying Equation 2 is any point on curve 761 in the graph of Figure 22A, and there are a large number of combinations.

An example of a selection case of a specific combination from these various combinations will be described. For example, assume when multi-channel surround reproduction such as 8-channel LPCM reproduction is performed. It is assumed that each channel includes 96 kHz/24 bits of data. In this case, the amount of data required for reproduction, that is, the reading rate is 96 kilohertz×24 bits×8ch=18.432 megabits per second, so that if the audio data reading rate R _TS2 is set to 20 megabits per second left and right, then 8-channel LPCM reproduction can be made.

In this way, first, a required audio data read rate R _TS2 of around 20 Mbits per second is obtained and assigned to Equation 2 to calculate an image data read rate R _TS1 satisfying Equation 2. This corresponds to processing for obtaining the audio data read rate R _TS2 and the image data read rate R _TS1 corresponding to the point 762 of the curve 761 of the graph in FIG. 23 . As can be seen from the graph, when the required audio data read rate R _TS2 is less than 20 megabits per second, it is possible to reproduce the browsable slide show by using the curve corresponding to the graph in Fig. 23 Among the combinations of dots on 761, a combination with a higher image data reading rate R _TS1 is selected to shorten the image data reading time.

Each of the data in Equation 2 is set based on the assumption that overall buffer size [RB1+RB2] megabytes = 6.05 megabytes, read rate from the drive: _RUD = 54 megabits per seconds, and the jump time (T _JUMP ) = 1.01 seconds.

The values of the overall buffer size [RB1+RB2] and the read rate from the drive R _UD are determined according to the function of the reproducing device, and in accordance with the function of the reproducing device and the interval between image data and audio data recorded in the information recording medium to determine the jump time. The allowable jump distance differs depending on the recording format of the content recorded in the information recording medium, and the jump time to be applied depends on the recording format.

In addition, an assumption is made about the case of performing 6-channel LPCM reproduction such as multi-channel surround reproduction. It is assumed that each channel includes 192 kHz/24 bits of data. In this case, the amount of data required for reproduction, that is, the reading rate is 192 kilohertz×24 bits×6ch=27.646 Mbits per second, so that if the audio data reading rate R _TS2 is set to 30 Mbits per second left and right, then 6-channel LPCM reproduction can be made, each of which includes 192 kHz/24-bit data.

In this way, first, the required audio data read rate R _TS2 is calculated, and each of the overall buffer size [RB1+RB2] and the read rate R _UD from the drive is obtained, furthermore, all The time required for the trip, half trip and 1/3 trip jump is taken as the jump time T _JUMP . The audio data read rate R _TS2 and the image data read rate R _TS1 satisfying Formula 2 can be calculated based on each of these obtained values, and non-stop can be guaranteed by recording data satisfying the above conditions in an information recording medium A browseable slide show rendition.

(2) Processing Example B

Referring to Fig. 24, processing example B is described. The processing example B is not the processing of directly applying formula 2, but the processing of setting such a conditional expression, that is:

R _TS1 +R _TS2 = X [Eq.3],

where the overall rate value of the image data read rate R _TS1 and the audio data read rate R _TS2 is a fixed value [X] or less to enable simplified processing, and the image data read rate R _TS1 and the audio data read rate R The combination of _TS2 is based on the conditional expression Equation 3.

Applying Equation 3 makes it easier to define conditions than Equation 2. In the case where _the overall rate value [X] in Equation 3 is less than the bit rate R _UD read from the drive, the overall buffer size [RB1+ _RB2 ] will not have varies greatly, thereby allowing the effect of conditions equivalent to Equation 2, where the actual buffer size is fixed.

Referring to FIG. 24 , processing using Formula 3 is described. FIG. 24A shows a graph of the relationship between rates satisfying Equation 3. FIG. In the graph, the horizontal axis shows the image data read rate R _TS1 Mbit/s, and the vertical axis shows the audio data read rate R _TS2 Mbit/s. This example shows a case where the overall rate value [X] is set to 22 megabits per second. That is, R _TS1 +R _TS2 =22.

In FIG. 24B , the horizontal axis shows the image data read rate R _TS1 megabit per second, and the vertical axis shows the overall buffer size [RB1+RB2]MB. In the processing example, the overall buffer size [RB1+RB2] is varied between 6.05 and 7.34 in order to satisfy Equation 2 under the condition of R _TS1 +R _TS2 =22.

The combination of the image data reading rate R _TS1 Mbit/s and the audio data reading rate R _TS2 Mbits satisfying Formula 4 is any point on the curve 764 in the graph of FIG. 24A , and there are a large number of combinations.

The process of selecting a specific combination from these combinations is performed similarly to the above-described process example A. However, the formula to be applied is not formula 2 but formula 3, and a combination of the image data reading rate R _TS1 megabit per second and the audio data reading rate R _TS2 can be easily obtained.

For example, an assumption is made about a case of performing multi-channel surround reproduction such as performing 8-channel LPCM reproduction. It is assumed that each channel includes 96 kHz/24 bits of data. In this case, the amount of data required for reproduction, that is, the reading rate is 96 kilohertz×24 bits×8ch=18.432 megabits per second, so that if the audio data reading rate R _TS2 is set to 20 megabits per second left and right, then 8-channel LPCM reproduction can be performed.

In this way, first, the required audio data read rate R _TS2 of about 20 Mbits per second is obtained and assigned to Equation 3 to calculate the image data read rate R _TS1 satisfying Equation 3. This corresponds to processing for obtaining the audio data read rate R _TS2 and the image data read rate R _TS1 corresponding to the point 765 of the curve 764 of the graph in FIG. 25 . As can be seen from the graph, when the required audio data read rate R _TS2 is less than 20 megabits per second, it is possible to reproduce the browsable slide show by using the curve corresponding to the graph in Fig. 25 Among the combinations of dots on 764, select a combination in which the image data read rate R _TS1 is larger to shorten the image data read time.

In the processing example B, similarly to the processing example A, first, the required audio data read rate R _TS2 is calculated, and each of the overall buffer size [RB1+RB2] and the read rate from the drive is obtained data, and in addition, the time required for jumping of full stroke, half stroke and 1/3 stroke is obtained as jump time T _JUMP . The audio data read rate R _TS2 and the image data read rate R _TS1 satisfying Formula 3 can be calculated based on each of these obtained values, and uninterrupted can be guaranteed by recording data satisfying the above conditions in an information recording medium A browseable slide show rendition.

A table (reading rate setting table) showing combinations of the audio data reading rate R _TS2 and the image data reading rate R _TS1 satisfying Formula 3, and setting the allowable jump distance as full stroke, half stroke and the overall buffer size [RB1+RB2] required by the reproduction device in the case of 1/3 run, which corresponds to the expression used in Processing Example B, namely R _TS1 +R _TS2 =X [Eq.3 ], the overall rate value [X] is set to the following situation, namely:

(a) X = 17 megabits per second,

(b) X = 22 megabits per second, and

(c) X = 32 megabits per second, as shown in Figures 26-28.

It should be noted that the table uses a combination of audio data read rate R _TS2 and image data read rate R _TS1 , and does not have a maximum read rate R _MAX1 using image data contained in recorded data and recorded data contained in The combined configuration of the maximum read rate of audio data R _MAX2 . This is because R _TS1 and R _TS2 are only the rate of MPEG-TS (Transport Stream) and can directly have an impact on the rate limit of image data and audio data.

FIG. 26 is a reading rate setting table based on a setting example of R _TS1 +R _TS2 =17 Mbit/s. The audio data read rate R _TS2 is set in the range of 2-15 Mbits per second. The table shows the combination of the audio data reading rate R _TS2 and the image data reading rate R _TS1 satisfying the formula 3, that is, R _TS1 +R _TS2 =17 megabits per second, and shows that the allowable The jump distance of is set to the overall buffer size [RB1+RB2] required by the playback device in the case of full stroke, half stroke and 1/3 stroke.

For example, in the case of setting the audio data read rate R _TS2 =15 Mbit/s, the image data read rate R _TS1 is 2 Mbit/s. In this case, the overall buffer size [RB1+RB2] required by the rendering device is 5.64 megabytes in a configuration allowing full-run jumps, and is 4.59 megabytes, while in the configuration that allows 1/3 trip jumps, the overall buffer size is 4.09 megabytes. Then, for each combination of the audio data read rate R _TS2 =15-2 Mbit/s and the image data read rate R _TS1 =2-15 Mbit/s, after setting each jump distance When is the maximum jump distance, the value of the overall buffer size [RB1+RB2] required by the rendering device is obtained.

It should be noted that, in the case where the overall buffer size [RB1+RB2] of the reproduction device is determined in advance, when recording content compatible with a browsable slideshow into an information recording medium, the maximum buffer size can be determined from the list data. Jump distance allowed.

For example, in the case where the overall buffer size [RB1+RB2] of the reproducing device is 5.00 megabytes, if in the data shown in FIG. Making settings, that is, making settings in the data area 767 in FIG. 26, enables uninterrupted playback of a browsable slide show in the playback device. In other words, when 1/3 of the stroke is set as the maximum jump distance, the audio data reading rate R _TS2 =15-2 Mbits per second and the image data reading rate R _TS1 =2-15 Mbits per second are allowed All combinations.

In addition, when half-stroke is set as the maximum jump distance, only the combination of the audio data reading rate R _TS2 = 15-12 Mbits per second and the image data reading rate R _TS1 = 2-5 Mbits per second is allowed , and a combination of an audio data rate R _TS2 =5-2 Mbit/s and an image data read rate R _TS1 =12-15 Mbit/s.

In addition, when the full travel is set as the maximum jump distance, any reading rate of audio data R _TS2 =15-2 Mbits per second and image data reading rate R _TS1 =2-15 Mbits per second is not allowed. combination.

An entity performing generation of content and data recording can set the content mode, ie, the audio data read rate R _TS2 and the image data read rate R _TS1 , and set jump distances at the time of data recording based on the list data.

FIG. 27 is a reading rate setting table based on a setting example of R _TS1 +R _TS2 =22 Mbit/s. The read bit rate R _TS2 of the audio data is set in the range of 2-20 Mbits per second. The table shows the combination of the audio data read rate R _TS2 and the image data read rate R _TS1 satisfying the formula 3, that is, R _TS1 +R _TS2 =22 megabits per second, and shows that at The overall buffer size [RB1+RB2] required by the playback device when the allowable jump distance is set as the full stroke, half stroke, and 1/3 stroke within the range.

Among the combinations shown in FIG. 27, for example, the combination in the top line, that is, the combination of the audio data read rate R _TS2 =20 Mbit/s and the image data read rate R _TS1 =2 Mbit/s is used Combination for realizing reproduction of 8-channel surround audio data consisting of 96 kHz/24-bit data. The read rate required to reproduce 8-channel surround audio data is 96 kHz x 24 bits x 8ch = 18.432 megabits per second.

The combination of the audio data reading rate R _TS2 = 20 Mbits per second and the image data reading rate R _TS1 = 2 Mbits per second in the top line satisfies the audio data reading rate R _TS2 > 18.432, and is capable of performing 8 sound Example of settings for LPCM playback.

In this setting, in the case of setting the allowable jump distances of full stroke, half stroke, and 1/3 stroke, the overall buffer size [RB1+RB2] required by the reproduction device is 7.42 megabytes, 6.05 megabytes and 5.39 megabytes. If the overall buffer size is equal to or larger than these buffer sizes, uninterrupted browsable slide show reproduction of 8-channel surround audio data consisting of 96 kHz/24-bit data can be performed.

FIG. 28 is a reading rate setting table based on a setting example of R _TS1 +R _TS2 =32 Mbit/s. The read bit rate R _TS2 of the audio data is set in the range of 2-30 Mbits per second. The table shows the combination of the audio data read rate R _TS2 and the image data read rate R _TS1 satisfying the formula 3, that is, R _TS1 +R _TS2 =32 megabits per second, and shows that at The overall buffer size [RB1+RB2] required by the playback device when the allowable jump distance is set as the full stroke, half stroke, and 1/3 stroke within the range.

Among the combinations shown in FIG. 28 , for example, the combination in the uppermost row, that is, the combination of the audio data read rate R _TS2 =30 Mbit/s and the image data read rate R _TS1 =2 Mbit/s is Combination for realizing reproduction of 6-channel surround audio data consisting of 192 kHz/24-bit data. The read rate required to reproduce 6-channel surround audio data is 192 kHz x 24 bits x 6ch = 27.648 megabits per second.

The combination of the audio data reading rate R _TS2 = 30 Mbits per second and the image data reading rate R _TS1 = 2 Mbits per second in the top line satisfies the audio data reading rate R _TS2 >27.646, and is capable of performing 6 sound Example of settings for LPCM playback.

In this setting, the total buffer size [RB1+RB2] required by the reproduction device is 11.40 megabytes, 9.28 megabytes and 8.27 megabytes. If the overall buffer size is equal to or larger than these buffer sizes, uninterrupted browsable slide show reproduction of 6-channel surround audio data consisting of 192 kHz/24-bit data can be performed.

In the case of processing Example A, that is, directly applying Equation 2, it is also possible to generate tables similar to those shown in FIGS. The overall buffer size [RB1+RB2] required by the reproduction device described above is set in order to set the maximum allowable jump distance to be set when recording content. In both processing examples A and B, it is possible to calculate the overall buffer size [RB1+RB2] required by the reproducing device by not using the table but using Equation 2 or Equation 3, so that the setting will be set when recording the content The maximum allowable jump distance.

The process of generating the read rate setting table will be described with reference to the flowchart shown in FIG. 29 . First, in step S301, the overall buffer size [RB1+RB2] is set to [X]. [X] is a value defined between the upper and lower limits of the predefined overall buffer size. In step S302, the value of the audio data read rate R _TS2 is set to a value [Y] defined between the upper and lower limits of the pre-defined audio data read rate R _TS2 .

In step S303, in terms of the audio data reading rate R _TS2 =Y, the upper limit value [Z] of the settable image data reading rate R _TS1 is calculated. This calculation process employs Equation 2 in the processing example A described above, while Equation 3 is employed in the processing example B.

In step S304, it is judged whether the processing of all data (for example, 2-20 megabits per second) about the preset audio data reading rate R _TS2 =Y has been completed, and when the processing has not been completed, update in step S302 The audio data reading rate R _TS2 =Y (for example, per 1 megabit per second), and the processing of step S303 is repeatedly performed.

In step S304, when it is judged that the processing of all data (for example, 2-20 megabits per second) about the preset audio data reading rate R _TS2 =Y has been completed, the process proceeds to step S305 to judge Whether to calculate the overall buffer size [RB1+RB2]=X within the range defined between the predefined upper and lower bounds of the overall buffer size. In the case where there are unprocessed values, the procedure returns to step S301 so as to update the overall buffer size [RB1+RB2]=X, and the processing after step S302 is repeatedly performed.

For values of overall buffer size RB1+RB2=X and audio data read rate R _TS2 =Y, only values requiring calculation can be selected to perform the corresponding update process. According to the processing shown in the flowchart, the combination of the overall buffer size [RB1+RB2]=X, the audio data read rate R _TS2 =Y and the image data read rate R _TS1 =Z is determined, and the read rate is generated Setup tables, such as those shown in Figures 26-28.

[ RB1+RB2]. If the jump time T _JUMP is calculated separately when various maximum jump distances are set so as to assign calculation results to satisfy formula 2, then if it is determined that the overall buffer size [RB1+RB2]=X and the audio data read rate _RTS2 = The processing of the allowable setting range of the value of Y is performed when the flow shown in FIG. 29 is executed, and then data corresponding to each maximum jump distance can be calculated.

(3) Content authoring and content record processing

Next, content creation and content recording processing when the above-described processing examples A and B are employed respectively will be described.

First, according to the processing example A, that is, Equation 2 as described above, the method for calculating the image data read rate R _TS1 and the audio data read rate R _TS2 will be described with reference to the flow charts shown in FIGS. 30 and 31 . Two processing examples for . The processing flow in FIG. 30 is a flow showing processing steps when the audio data read rate R _TS2 or the image data read rate R _TS1 is predetermined. The processing flow in FIG. 31 is a flow of processing steps when these rates have not been determined.

First, with reference to FIG. 30 , content creation and content recording processing when the audio data read rate R _TS2 or the image data read rate R _TS1 is determined in advance will be described.

In step S311, content material is determined. In other words, the content to be recorded in the information recording medium is determined. Here, the content means content suitable for the browsable slide show. Next in step S312, the overall buffer size [RB1+RB2] of the reproduction device is acquired. It is assumed that the overall buffer size is predetermined according to the rendering device. For example, obtain the buffer size for each device from a table that records the overall buffer size for the corresponding device. Specifically, there may be a table in which the overall buffer size [RB1+RB2] of each device is determined as Ba, Bb, or Bc so that (1) the overall buffer size of the mobile device = Ba(MB ), (2) the overall buffer size of the mobile rendering device (player) = Bb (MB) and (3) the overall buffer size of the high-end device = Bc (MB) and so on.

Next at step S313, a combination of the audio data read rate R _TS2 and the image data read rate R _TS1 is determined. For example, in the case of 8-channel LPCM reproduction that requires each channel to perform multi-channel surround reproduction composed of 96 kHz/24-bit data, the audio data read rate R _TS2 of about 20 Mbits per second is required. Also, in the case of 6-channel LPCM reproduction composed of 192 kHz/24 bit data, an audio data read rate R _TS2 of about 30 Mbit/s is necessary. Also, as for the image data read rate R _TS1 , a necessary read rate corresponding to the created content is set.

In step S314, data of the combination of the set audio data read rate R _TS2 and image data read rate R _TS1 and the overall buffer size acquired in step S312 are input to Equation 2, and it is judged whether they satisfy Equation 2. In the case that formula 2 is not satisfied ("No" in step S314), then the process returns to step S313 to reset the necessary reading rate corresponding to the created content, which is the audio data reading rate Combination of R _TS2 and image data read rate R _TS1 .

The processing steps are executed until a value satisfying Formula 2 is obtained, and in the case where a value satisfying Formula 2 is finally obtained ("Yes" in step S314), the process proceeds to step S315 so that the content data Recorded in the information recording medium, the content data has a combination of an audio data read rate R _TS2 and an image data read rate R _TS1 satisfying Formula 2. Data recording processing to an information recording medium includes encoding processing of content, MPEG multiplexing processing, and determination processing of data arrangement conditions.

For example, when determining the data arrangement condition, audio and image data need to be recorded after defining the maximum allowable jump distance (full stroke, half stroke, 1/3 stroke). When inputting the jump time T _JUMP into Formula 2, it is necessary to set the maximum allowable jump distance as a jump distance satisfying Formula 2.

By recording content in the information recording medium in this manner, content recording satisfying Formula 2 can be realized, and reproduction can be performed without data discontinuity when browsable slide show reproduction is performed in the reproduction device.

Next, referring to FIG. 31A , description is made of content creation and content recording processing when the audio data read rate R _TS2 and the image data read rate R _TS1 have not been determined.

In step S321, content material is determined. In other words, content suitable for the browsable slide show is determined, and the content will be recorded in the information recording medium. Next in step S322, the overall buffer size [RB1+RB2] of the reproduction device is acquired. To obtain the overall buffer size in a manner similar to the processing example above, a table or the like is used in which the overall buffer size [RB1+RB2] for each device is determined as Ba, Bb or Bc so that Let (1) the overall buffer size of the mobile device = Ba (MB), (2) the overall buffer size of the mobile rendering device (player) = Bb (MB) and (3) the overall buffer size of the high-end device = Bc (MB) and so on.

In step S323, the combination of the audio data reading rate R _TS2 and the image data reading rate R _TS1 is selected according to Equation 2 or the selected reading rate setting table satisfying Equation 2, that is, in the reading In the rate setting table, the audio data read rate R _TS2 , the image data read rate R _TS1 and the overall buffer size [RB1+RB2] are set. For example, in the case of the overall buffer size [RB1+RB2]=X, there are many combinations of the audio data read rate R _TS2 and the image data read rate R _TS1 satisfying Formula 2, such as the image shown in FIG. 31B The data read rate R _TS1 =2-20 and the audio data read rate R _TS2 =20-2, and a desired one can be selected from these combinations.

For example, in the case where each channel is required to perform 8-channel LPCM reproduction as multi-channel surround reproduction composed of 96 kHz/24-bit data, since an audio data read rate of approximately 20 Mbit/s is required [ R _TS2 ], so a combination of audio data read rate R _TS2 =20 Mbit/s and image data read rate R _TS1 =2 Mbit/s can be selected.

Next at step S324, content data having a combination of the audio data read rate R _TS2 and the image data read rate R _TS1 satisfying Formula 2 set at step S323 is recorded in the information recording medium. Data recording processing to an information recording medium includes encoding processing of content, MPEG multiplexing processing, and determination processing of data arrangement conditions. When determining the data arrangement condition, similar to the flow described above with reference to FIG. 30 , for example, audio and image data need to be recorded after defining the maximum allowable jump distance (full stroke, half stroke, 1/3 stroke).

Next, with reference to the flowchart shown in FIG. 32 , description will be made of content creation and content recording processing including determination of image data reading in accordance with processing example B, that is, the above-mentioned formula 3 [R _TS1 +R _TS2 <=X]. Processing of rate R _TS1 and audio data read rate R _TS2 .

In step S331, content material is determined. In other words, content suitable for the browsable slide show is determined, and the content will be recorded in the information recording medium. In step S332, the maximum value [X] of the overall value of the audio data read rate R _TS2 and the image data read rate R _TS1 is determined.

For example, when R _TS1 +R _TS2 =X=17Mbps corresponds to the reading rate setting table of FIG. 26 , R _TS1 +R _TS2 =X=22 megabits per second corresponds to the reading rate setting table of FIG. 27 , and R _TS1 +R _TS2 =X=32 megabits per second corresponds to the reading rate setting table of FIG. 28 .

In step S333, a combination of the audio data read rate R _TS2 and the image data read rate R _TS1 is specified in accordance with the value [X] determined in step S332. This combination is determined as a combination satisfying Equation 3, and can be selected from any of the tables in FIGS. 26-28 , for example, according to the value [X].

Next at step S334, content data having a combination of the audio data read rate R _TS2 and the image data read rate R _TS1 set at step S333 and satisfying Formula 3 is recorded in the information recording medium. Data recording processing to an information recording medium includes encoding processing of content, MPEG multiplexing processing, and determination processing of data arrangement conditions. When determining the data arrangement condition, the flow corresponding to the processing example A described above with reference to FIG. 30 and FIG. 31A is similar, for example, after defining the maximum allowable jump distance (full stroke, half stroke, 1/3 stroke) Audio and image data are required to be recorded.

By recording content in the information recording medium in this manner, content recording satisfying Formula 2 can be realized, and reproduction can be performed without data discontinuity when browsable slide show reproduction is performed in the reproduction device.

Referring next to FIGS. 33 and 34 , the functional structure of a data processing device for performing a process of determining a recording data configuration applied to image data and audio data of the above-mentioned browsable slide show will be described.

FIG. 33 shows the functional structure of the data processing apparatus that performs processing for determining image data and audio data by employing processing example A, ie, Formula 2. The data processing apparatus has buffer size setting means 771, table generating means 772, rate determining means 773 and data recording means 774, as shown in FIG.

The buffer size setting means 771 sets the overall buffer size of image data and audio data in a reproducing device for performing browsable slideshow reproduction processing to a fixed value. For example, acquire the overall buffer size [RB1+RB2] information of the reproduction target device, such as (1) the overall buffer size of the mobile device = Ba(MB), (2) the overall buffer size of the mobile reproduction device (player) = Bb (MB) and (3) the overall buffer size of the high-end device = Bc (MB) and so on.

The table generating means 772 generates a table listing correspondences between combinations of image data reading rates and audio data reading rates satisfying the above formula 2 and the overall buffer size of the reproducing apparatus. For example, a read rate setting table with the data configuration shown in Figures 26-28.

The rate determination means 773 determines the image data read rate and the audio data read rate according to each of the overall buffer size of the reproducing device, the maximum jump time allowed for data reproduction, and the data read rate in the reproducing device. The rate determining means 773 determines the reading rate of image data and audio data by using the rate setting table generated by the table generating means 772, or determines the reading rate without using the rate setting table. is a value that satisfies Equation 2 above.

The data recording means 774 executes a process of recording the image data and audio data having the read rate determined by the rate determining means 773 on an information recording medium 775 or a master information recording medium. Data format for rate matching.

FIG. 34 shows the functional structure of the data processing apparatus that performs processing for determining image data and audio data by employing Processing Example B, ie, Equation 3. The data processing device has rate total value setting means 781 , table generating means 782 , rate determining means 783 and data recording means 784 , as shown in FIG. 34 .

The rate total value setting means 781 sets the rate total value X as the sum of the image data read rate and the audio data read rate applied to the browsable slide show.

Said table generating means 782 generates a table satisfying Formula 3, and in addition, said table also lists the relationship between the combination of image data reading rate and audio data reading rate satisfying Formula 3 and the overall buffer size of the reproducing device The corresponding relationship, for example, the reading rate setting table with the data configuration shown in FIGS. 26-28 .

The rate determining means 783 determines the image data read rate R _TS1 and the audio data read rate R _TS2 according to Formula 3 or a table record set according to Formula 3. At the time of this determination process, a process of determining an image data read rate R _TS1 and an audio data read rate R _TS2 satisfying the expression: R _TS1 +R _TS2 <=X is performed.

The data recording means 784 executes a process of recording image data and audio data having an image data reading rate and a rate determined with the rate determining means 783 on an information recording medium 785 or a master information recording medium. The audio data read rate matches the data format.

The information recording medium thus formed is configured as an information recording medium including a data recording configuration having an arrangement of data in which image data and audio data correspond to a reproduction device according to a reproduction process that executes a browsable slideshow. The image data read rate and the audio data read rate determined by each of the overall buffer size of the image data and audio data, the maximum jump time allowed for data reproduction, and the data read rate in the reproduction device, and the Image data and audio data have a jump distance in which jump processing at the time of reproduction can be performed within a maximum jump time.

Specifically, the information recording medium is configured to have a data recording configuration having a combination of an image data reading rate and an audio data reading rate, wherein the reading rate satisfies the above expression ( Formula 2 or Formula 3).

[6. Configuration of playback device]

Next, one embodiment of the configuration of the data processing apparatus that performs the above-described data processing and also implements data recording and reproduction processing on the installed information recording medium is now described with reference to FIG. 35 . In order to illustrate the functions of the present invention, the data processing device of Fig. 20 and Figs. The data processing device of Fig. 35.

The data processing apparatus 800 has a driver 890 for driving an information recording medium 891 to perform input and output of data recording and reproduction signals; a CPU 870 for performing data processing in accordance with various programs; a ROM 860 usable as a program and parameters, etc. storage area; memory 880; input/output I/F 810 for performing input and output of digital signals; input/output I/F 840 for performing input and output of analog signals; and having A/D and D/ A converter 841; MPEG codec 830 for performing encoding and decoding of MPEG data; TS/PS processing means 820 for performing TS (transport stream)/PS (program stream) processing; and encryption processing means 850, such as an encryption LSI for performing various encryption processes; and each block connected to the bus 801 .

First, the operation when data recording is described. Two cases where data to be recorded are available are assumed, one case is a digital signal input and the other case is an analog signal input.

In the case of a digital signal, the digital signal is provided through the input/output I/F 810 for digital signal, and the data obtained by performing appropriate encryption processing using the encryption processing device 850 is stored in the information In the recording medium 891. Alternatively, when storing the data by changing the data format of the supplied digital signal, after changing the data into the storage data format using the MPEG codec 830, the CPU 870 and the TS/PS processing device 820, by using The encryption processing unit 850 performs appropriate encryption processing and stores the data in the information recording medium 891 .

In the case of an analog signal, the analog signal supplied to the input/output I/F 840 is converted into a digital signal using the A/D converter 841, and further changed into a code available at the time of recording using the MPEG codec 803. . Then, the TS/PS processing means 820 is used to perform changing of data into AV multiplexed data usable as a recording data format, and the data obtained by performing appropriate encryption processing using the encryption processing means 850 is stored when necessary. In the recording medium 891.

For example, in the case of recording content composed of AV stream data formed of MPEG-TS data, when the content is segmented into a content management unit (Content Protection System (CPS) unit ), use the encryption processing device 850 to encrypt the content using the unit key, and then record it in the recording medium 891 through the drive 890.

Processing applied at the time of data reproduction from the information recording medium will now be described. For example, when performing reproduction of AV stream data composed of MPEG-TS data specified as the content, the identifier of the content management unit is applied to the data read from the information recording medium 891 by the drive 890 . Then, a process of acquiring a unit key corresponding to the identified content management unit is performed, thereby using TS (Transport Stream)/PS (Program Stream) processing means 820 and passing through encryption processing means 850 based on the acquired unit key. Decrypt to divide the data into video, audio and subtitle etc.

The digital data decoded by the MPEG decoder 830 is output by being converted into an analog signal by the D/A converter 841 included in the input/output I/F 840. Alternatively, in the case of digital output, the MPEG-TS data decoded by the encryption processing means 850 is output as digital data through the input/output I/F 810. In this case, the output is provided to a digital interface such as IEEE 1394, Ethernet cable and wireless local area network. It should be noted that, in the case of supporting the network connection function, the input/output I/F 810 provides the network connection function. Also, in the case of outputting by changing data into a format accepted by an output destination device within the reproduction device, once the rate change and encoding change processing is applied in the MPEG codec 830 to video, audio and subtitle etc., wherein the video, audio and subtitles, etc. are obtained through the division of the TS/PS processing device 820, then in this case, by the TS/PS processing device 820 again by The data obtained by multiplexing, etc., is output through the digital input/output I/F 810. Alternatively, the CPU 870 may be used to output data through the digital input/output I/F 810 after the data becomes encoded and multiplexed files other than MPEG data.

The reproducing apparatus of the present invention is configured, for example, as a reproducing apparatus for performing reproduction processing of an information recording medium in which recording data including image data having image data is recorded at predetermined intervals. Image data clips and audio data clips with audio data available for a browsable slide show in which audio reproduction processing is performed in parallel with continuous reproduction of still images. The reproducing device includes an image data buffer storing image data read from the information recording medium, an audio data buffer storing audio data read from the information recording medium, and a device for acquiring data from the image data buffer and The data of the audio data buffer in order to perform the reproduction processing of the reproduction device. The reproducing device is configured as a reproducing device having a control unit for performing data reading control so that, in the case where the image data buffer holds image data at a maximum value, the information recording medium The jump operation is started at the audio data recording position at predetermined intervals. Execution of this data read control enables reproduction of a browsable slide show without interruption and with efficient use of buffers.

It should be noted that a program for realizing reproduction and recording processing is stored in the ROM 860, and in the process of running the program, the memory 880 is used to store parameters and data, and can be used as a work area. It should be noted that although FIG. 35 has described a configuration of a device capable of performing data recording and reproduction, a device providing only a reproduction function and a device providing only a recording function should also have such a configuration, and the present invention can also be applied to these devices.

In the foregoing specification, the invention has been described in detail with reference to specific embodiments. However, it should be understood that modifications and changes of the embodiments can be made without departing from the scope of the present invention, as will be apparent to those skilled in the art. That is, it should be understood that the disclosure of the present invention is given as illustrative rather than restrictive. It should also be understood that the scope of the claims should be construed to define the scope of the invention as stated at the outset.

It should be noted that a series of processes that have been described in the specification can be executed using hardware, software, or a combination of hardware and software. In the case of processing with software, execution of a program including a sequence of processing is allowed by installing the program into a memory of a computer incorporated in dedicated hardware, or a general-purpose computer capable of executing various processing.

The program may be contained in the recording medium such as a hard disk and a ROM (Read Only Memory) in advance. Alternatively, the program may also be temporarily or permanently contained (recorded) in a removable recording medium such as a floppy disk, CD-ROM (Compact Disk Read Only Memory), MO (Magneto-Optical) disk, DVD (Digital Versatile CD), magnetic disk and semiconductor memory. A removable recording medium as described above can be provided as so-called packaged software.

Incidentally, in addition to being installed into the computer from the above-mentioned removable recording medium, the program may be wirelessly transferred from the download location to the computer, or wired to the computer through a network such as a local area network (LAN) and the Internet , in this case, the computer may receive the program transferred as described above to install it into a contained recording medium such as a hard disk.

It should be noted that the various processes explained in the specification may be performed not only in chronological order as described, but also in parallel, or one by one according to the processing capability of a device performing the processes, or as needed. Also, the system mentioned in this specification has the form of a logical set composed of more than one unit, and the units contained in the logical set are not always incorporated into the same housing.

As has been described, according to the configuration of the present invention, for example, the configuration of separately recording image data clips and audio data clips in discs such as Blu-ray Discs and DVDs employs a configuration that is determined to be Continuous reproduction of still images The allowable range of image data clip-to-audio data clip jump required when data reading occurs in a so-called browsable slideshow in which audio reproduction processing is performed in parallel, thereby based on the determined allowable jump range information To determine the arrangement condition of data stored in the information recording medium so as to enable seamless reproduction so that no data gap occurs when a browsable slide show is performed for parallel reproduction of audio and still images.

Furthermore, the present invention employs a configuration that calculates the time required for jumping based on the determined allowable jump range information, thereby determining the image data buffer and the audio data buffer based on the calculated required jump time. size of the buffer, wherein the image data buffer contains image data read from an information recording medium and the audio data buffer contains audio data, so that a browsable slide show can be implemented with a smaller buffer meeting minimum requirements Configurations for seamless reproduction.

In addition, according to the configuration of the present invention, in the process of determining the recording data configuration of image data and audio data applied to a browsable slide show that executes audio reproduction processing in parallel with the continuous reproduction of still images, the The overall buffer size of image data and audio data in the reproducing device is set to a fixed value, and is set according to each of the reproducing device overall buffer size, the maximum jump time allowed for data reproduction, and the data read rate in the reproducing device to determine the image/audio data read rate. According to this, data can be recorded and reproduced at a rate freely selected from a plurality of combinations of the image data read rate and the audio data read rate satisfying that no data is present. Intermittent reproduction conditions, and thus, a configuration for recording/reproducing high-quality data such as 8-channel LPCM data can be realized.

Also, according to the configuration of the present invention, in the process of determining the recording data configuration of image data and audio data applied to a browsable slide show in which audio reproduction processing is performed in parallel with continuous reproduction of still images, the image The total value of the data read rate and the audio data read rate is set to a fixed value [X], and the image/audio data read rate is determined according to the set conditions. According to this, data can be recorded and reproduced at a rate freely selected from a plurality of combinations of the image data reading rate and the audio data reading rate satisfying the requirement of the data without data discontinuity. Conditions for performing reproduction, and thus, a configuration for recording/reproducing high-quality data, such as recording/reproducing of 8-channel LPCM data, can be realized.

This article contains subject matter related to Japanese Patent Applications JP 2004-094657 and JP 2004-323009 filed with the Japan Patent Office on March 29, 2004 and November 5, 2004, respectively, the entire contents of which are incorporated herein Introduced for reference.

Claims (10)

1. A data processing method for determining an arrangement of recording data for an information recording medium, the recording data including image data clips having image data and audio data clips having audio data, the image data clips and audio data clips To be applied to a browsable slide show that performs audio reproduction processing in parallel with continuous reproduction of still images, the data processing method includes: an allowable jump range determining step for determining an allowable jump range in reproduction processing of the information recording medium; and a data arrangement determining step for determining an arrangement of data so that image data clips and audio data to be stored in the information recording medium are set within the allowable jump range calculated in the allowable jump range determining step clip. 2. The data processing method as claimed in claim 1, wherein: The data arrangement determining step is a step of calculating the data size S _MAIN of the image data clip and the data size S _SUB of the audio data clip to be applied to the browsable slide show, thereby determining a data arrangement conforming to the following setting , when the allowable jump range calculated in the allowable jump range determination step obtains the value of the maximum jump distance _DMAX , the following settings satisfy the following conditions (a) and (b): (a) S _MAIN + S _SUB ≤ D _MAX , and (b) The image data clips and audio data clips should be arranged continuously within the range of size D _MAX respectively. 3. The data processing method as claimed in claim 1 or 2, further comprising: a required jump time calculating step for calculating the time required for jumping based on the allowable jump range determined in the allowable jump range determining step; and a buffer size determining step for determining the size of an image data buffer and the size of an audio data buffer based on the required jump time calculated in the required jump time calculating step, wherein the image data buffer Image data read from an information recording medium is stored, and the audio data buffer stores the audio data. 4. The data processing method as claimed in claim 3, wherein: The required jump time calculating step is a step of calculating the sum of a seek time for picking up and an overhead time for processing involving a read data unit block of the information recording medium in terms of jumping within the same layer; And in terms of the inter-layer jump, it is used to calculate the sum of the pick-up seek time, the pick-up adjustment time related to the inter-layer seek, and the overhead time related to the process of reading the data unit block of the information recording medium. 5. The data processing method as claimed in claim 1, further comprising: a data recording step of performing data recording to the information recording medium based on the data arrangement determined in said data arrangement determining step. 6. A data processing apparatus for determining an arrangement of recording data for an information recording medium, the recording data including image data clips having image data and audio data clips having audio data, the image data clips and audio data clips To be applied to a browsable slide show that performs audio reproduction processing in parallel with continuous reproduction of still images, the data processing device includes: an allowable jump range determining means for determining an allowable jump range in reproduction processing of the information recording medium; and data arrangement determining means for determining a data arrangement so as to set image data clips and audio data clips to be stored in said information recording medium within the allowable jump range calculated in said allowable jump range determining means. 7. A data processing apparatus as claimed in claim 6, wherein: The data arrangement determining means is configured to calculate a data size S _MAIN of an image data clip and a data size S _SUB of an audio data clip to be applied to the browsable slide show, thereby determining a data arrangement conforming to the following settings, When the allowable jump range calculated in the allowable jump range determining device obtains the value of the maximum jump distance D _MAX , the following settings satisfy the following conditions (a) and (b): (a) S _MAIN + S _SUB ≤ D _MAX , and (b) The image data clips and audio data clips should be arranged continuously within the range of size D _MAX respectively. 8. A data processing device as claimed in claim 6, further comprising: required jump time calculating means for calculating the time required for jumping based on the allowable jump range determined in the allowable jump range determining means; and buffer size determining means for determining the size of the image data buffer and the size of the audio data buffer based on the required jump time calculated by the required jump time calculating means, wherein the image data buffer Image data read from an information recording medium is stored, and the audio data buffer stores the audio data. 9. A data processing apparatus as claimed in claim 8, wherein: The required jump time calculating means is configured to calculate a sum of a seek time for pickup and an overhead time for processing involving a read data unit block of the information recording medium, in terms of jumping within the same layer. ; and in terms of inter-layer jump, for calculating the sum of the pickup seek time, the pickup adjustment time related to inter-layer seek, and the overhead time related to the processing of reading the data unit block of the information recording medium. 10. A data processing device as claimed in claim 6, further comprising: data recording means for performing data recording to the information recording medium based on the data arrangement determined by the data arrangement determining means.

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