JP2007102868A - Optical disk playback device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk playback device capable of quickly starting the playing of an optical disk having an AVI file recorded therein. <P>SOLUTION: When an optical disk is set, reading of index information of the optical disk is automatically executed. When a reproduction start is instructed before the reading of the index information is completed, the reading of the index information is halted to store a halting position, and playing of the optical disk is started. Then, upon reception of a search instruction, the reading of the index information is resumed from the halting position, and after the reading is completed, search processing corresponding to the search instruction is executed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is applied to an optical disc reproducing apparatus for reproducing content stream data recorded on an optical disc.

  An optical disc such as a DVD or a CD is a medium that originally records video content and music content in a dedicated format. That is, various dedicated formats such as DVD_video, DVD_audio, CD_digital 1_audio, SACD (Super Audio CD) are defined for DVD and CD.

When reproducing a disc having such a format, the optical disc reproducing device reads the index information from the set disc to obtain the time information and address information of the content stream data, and then can start reproduction. It was also possible to perform playback during the search (for example, Patent Document 1).
JP 2005-166181 A

  However, since reading index information takes several seconds to several tens of seconds, the conventional optical disk playback device cannot start playback until the reading of index information is completed after the disk is set. It was unpopular with users who wanted to start.

  On the other hand, in recent optical disk playback apparatuses, not only the above-mentioned special format disks, but also general video files (AVI, WMV, etc.) and audio files (MP3, WMA, WAV, etc.) recorded on DVD-ROMs and CD-ROMs. Many have a function to play back. Of these file formats, the AVI format is widely used, for example, as a recording format (DV) of a digital video camera.

  Since this AVI file does not have time information in the data body, it can be read sequentially unless the index is read, but there is a problem that a search for playback during the operation cannot be performed. However, since reading of the index takes time as in the DVD-only format, it is not popular because the user cannot start playback immediately after setting the disc in the optical disc playback apparatus.

  In view of the above situation, an object of the present invention is to provide an optical disk reproducing apparatus capable of quickly starting reproduction of an optical disk on which an AVI file is recorded.

  The invention of claim 1 is used in an optical disc playback apparatus for playing back an optical disc on which content stream data that is a sequential data sequence of video and / or audio and index information that is time information of the content stream data are recorded. An operation means for accepting a start instruction that is an instruction to start reproduction of the optical disc and a search instruction that is an instruction to search for an intermediate portion of the content stream data, and the index information is read from the set optical disc and stored in an internal memory. And when the optical disc is set, the index reading unit is instructed to read the index information and the presence or absence of the start instruction is monitored. If there is a start instruction, reading of the index information is interrupted, the position of the interruption is stored, and then playback of the optical disk is started. When the search instruction is issued, is the reading of the index information completed? Control means for determining whether or not the reading is completed immediately, and when the reading is not completed, the index preaching means completes the reading and then executes a search process corresponding to the search instruction And.

  In the optical disk reproducing apparatus of the present invention, when the optical disk is set, reading of the index information is automatically executed. However, when the user gives a start instruction in the middle of reading, the reading of the index information is interrupted and the reading of the optical disk is stopped. Start playback. As a result, the user can immediately start reproduction without waiting for reading of the index information.

  Here, when playback is started without reading the index information, it can only be played back sequentially from the beginning of the content stream data, and a search function such as jump cannot be executed. There are few cases where playback is performed while randomly searching, and in most cases, the content is played back sequentially from the beginning, so that the content can be played back almost without any trouble without reading the index information.

  Further, in the optical disc of the present invention, when the search instruction is given by the user, the search operation is executed after the reading of the index information is completed. Therefore, even when the reading of the index information is interrupted halfway, it is necessary. At this point, reading can be resumed so that the search function can be executed.

  The invention of claim 2 is used in an optical disc reproducing apparatus for reproducing an optical disc on which content stream data that is a sequential data sequence of video and / or audio and index information that is time information of the content stream data are recorded. An operation means for accepting a start instruction that is an instruction to start reproduction of the optical disc and a search instruction that is an instruction to search for an intermediate portion of the content stream data, and the index information is read from the set optical disc and stored in an internal memory. And when the optical disc is set, the index reading unit is instructed to read the index information and the presence or absence of the start instruction is monitored. If there is a start instruction, the interrupt the reading of the index information, is characterized by comprising a control means for starting the reproduction of the optical disc, the.

  In the optical disk reproducing apparatus of the present invention, when the optical disk is set, reading of the index information is automatically executed. However, when the user gives a start instruction in the middle of reading, the reading of the index information is interrupted and the reading of the optical disk is stopped. Start playback. As a result, the user can immediately start reproduction without waiting for reading of the index information.

  According to a third aspect of the present invention, in the invention of the second aspect, when the reading of the index information is interrupted, the control means stores the interruption position, and thereafter, the index reading means receives the index information from the interruption position. It is characterized by resuming reading of.

  In the present invention, even when reading of index information is interrupted, by storing the interruption position, when reading of the index information is restarted after that, it is continued from the interruption position instead of re-reading from the beginning. Can be resumed automatically.

  According to a fourth aspect of the present invention, in the second and third aspects of the invention, when the search instruction is given, the control unit determines whether or not the reading of the index information is completed, and the reading is completed. When the reading is not completed, the index reading unit completes the reading, and then a search process corresponding to the search instruction is executed.

  In this invention, when a search instruction is issued by the user, the search operation is executed after the reading of the index information is completed. Therefore, even when the reading of the index information is interrupted, the reading is performed when necessary. Can be resumed so that the search function can be executed.

  According to the present invention, when the optical disc is set, the index information is automatically read. However, when the user gives an instruction to start reproduction (start instruction), the reading of the index information is not completed. However, since this reading is interrupted and reproduction of the optical disk is started, the user is not specialized.

  If a search instruction is input midway, if the index information has been read, the search operation is performed as is. If the index information has not been read, the reading is performed at this point. Since the search operation is executed after completion, the search will not be impossible even if the reproduction is started without completing the reading of the index information.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an optical disk reproducing apparatus according to an embodiment of the present invention.

  The optical disk reproducing apparatus includes a spindle motor 5 that rotates the optical disk 1, an optical pickup 2 that emits laser light for reproducing information recorded on the optical disk 1 and receives reflected light from the optical disk 1, and the light. By moving the pickup 2 in the radial direction of the optical disk ↓ and driving the spindle motor 5 and the thread mechanism 3 in accordance with an instruction from the system controller 22 and moving the objective lens built in the optical pickup 2 And a servo control unit 4 that performs control to move the focal position of the laser beam in the vertical and horizontal directions with respect to the recording surface of the optical disc 1.

  In addition, the optical disk reproducing apparatus converts an RF signal that is a read signal from the optical pickup 2 during reproduction of the optical disk 1 and converts the RF signal output from the RF amplifier 6 into digital data. A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format of the optical disc 1 in the RAM 7, and is output from the digital signal processing unit 8 in response to an instruction from the system controller 22. A stream separation unit 9 is provided for separating video data such as the main video, sub-picture data such as Japanese telop, and audio data from the data stream.

  In addition, the optical disc reproducing apparatus receives audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data for performing the decoding process in the audio decoder 11. The RAM 10 to store, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the sub-picture decoder 13 A RAM 12 for storing, a video decoder 15 for inputting video data output from the stream separation unit 9 and performing a predetermined decoding process, and a RAM 14 for temporarily storing data for performing the decoding process by the video decoder 15 And. The video decoder 15 has not only a function of decoding MPEG2 video stream data in the DVD_video format, but also a function of decoding data of various video formats (AVI, WMV, etc.).

  In addition, this optical disk reproducing apparatus combines the data output from the video decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and the video processor 17 outputs the data. The synthesized data is converted into a video signal for display and a video encoder 18 for displaying an image on the display device 20, and the data output from the audio decoder 1 is converted into an analog audio signal and supplied to, for example, a speaker 19. And a D / A converter 16.

  The optical disk playback apparatus also has a start button for instructing playback to the system controller 22, a stop button for instructing playback stop IL, and various search buttons for instructing a search such as fast forward, rewind, and index jump. An operation unit 21 and the system controller 22 for controlling the entire apparatus are provided. The operation unit 21 may be a remote controller or an operation unit provided on the operation panel of the apparatus main body.

  In addition, this optical disc playback apparatus includes a flash ROM 23 in which programs and data for controlling each component of the apparatus and for controlling the entire apparatus are stored.

  The system controller 22 is composed of a microcomputer including a work RAM. The work RAM stores an index table for storing index information read from the optical disk, and stores the interruption position when reading of the index information is interrupted. An interruption position register to be read and a reading completion flag set when reading of the index information is completed are set.

  This optical disc playback apparatus is equipped with the multi-function video decoder 15 as described above, and reads not only DVD_video discs in which video is recorded in a dedicated DVD format, but also DVD-ROMs, recorded AVIs, and the like. You can also play video files. Here, the AVI (Audio Video Interleave) format was developed in 1992, but is still used in many applications such as digital video.

  FIG. 2 is a diagram showing a schematic configuration of the AVI format. An AVI format file is composed of three areas: header information, movie information, and index information. The header information is composed of information necessary for reproduction such as a compression method and a frame rate. Movie information is the main body of audio stream data and video stream data, and consists of video stream data and audio stream data that are alternately stored in predetermined intervals. This movie information does not include time information. The index information includes necessary time information necessary for a search for intermediate playback. Therefore, index information is required to reproduce an AVI format file halfway.

  FIG. 3 is a flowchart showing the operation of the system controller 22 which is a control unit of the optical disk reproducing apparatus. When the optical disk is set on the tray and the system controller 22 recognizes that the set disk is a DVD-ROM and the recorded file is AVI, this operation is started.

  First, the system controller 22 reads the index information of the recorded AVI file (s1). If it is determined in s2 that the reading has been completed, the process proceeds to s4, and the reading completion flag is set to store that the read index information is complete. After that, the reproduction may be automatically started from the beginning of the AVI file, or may be waited until the user gives a reproduction instruction. The illustrated flow chart describes a procedure (s4 → s6) for automatically starting reproduction.

  If the user gives an instruction to start playback before reading of the index information is completed, the reading of the index information is interrupted, the interrupt position is stored (s5), and playback is started from the beginning of the AVI file. (S 6).

  After that, the reproduction operation is continued until the AVI file is completed. If a search operation is performed by the user in the middle (s10), it is determined whether or not the reading completion flag is set (s11). If the reading completion flag is set, the process proceeds from s11 to s15, and a time search of stream data is executed according to the user's operation.

  On the other hand, if the index reading completion flag is not set, the reading interruption position is read from the reading interruption position register (s12), and reading of the index information is resumed from that position (s13). This reading is continued until the index information is finished. Then, after setting the reading completion flag and storing that the index information is complete (s14), a time search instructed by the user is executed (s15).

  Thereafter, when the reproduction is performed up to the end of the stream (s16), this process is terminated.

  In this embodiment, the case where the AVI file is reproduced has been described as an example. However, the file to be reproduced is not limited to the AVI file.

  In this embodiment, the reading of the interrupted index information is resumed at the time of the search operation. However, the reading of the index information may be executed in the back process of the stream data reproduction.

Block diagram of an optical disk reproducing apparatus according to an embodiment of the present invention The figure which shows the structure of the AVI file reproduced | regenerated with the same optical disk reproducing device Flow chart showing the operation of the optical disk reproducing apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical disk 15 ... Video decoder 20 ... Display apparatus 22 ... System controller

Claims (4)

In an optical disc playback apparatus for playing back an optical disc in which content stream data, which is a sequential data sequence of video and / or audio, and index information, which is time information of the content stream data, is recorded.
An operation means for receiving a start instruction that is an instruction to start reproduction of the optical disc by a user and a search instruction that is an instruction to search an intermediate part of the content stream data;
Index reading means for reading the index information from the set optical disc and storing it in an internal memory;
When an optical disc is set, the index reading unit is instructed to read index information and the presence or absence of the start instruction is monitored. If the start instruction is received before the reading of index information is completed, After reading the index information and storing the position where it was interrupted, start playing the optical disc,
When the search instruction is issued, it is determined whether or not the reading of the index information is completed. When the reading is completed, the index reading unit reads the reading immediately. Control means for executing a search process corresponding to the search instruction after completion;
An optical disc playback apparatus comprising: In an optical disc playback apparatus for playing back an optical disc in which content stream data, which is a sequential data sequence of video and / or audio, and index information, which is time information of the content stream data, is recorded.
An operation means for receiving a start instruction that is an instruction to start reproduction of the optical disc by a user and a search instruction that is an instruction to search an intermediate part of the content stream data;
Index reading means for reading the index information from the set optical disc and storing it in an internal memory;
When an optical disc is set, the index reading unit is instructed to read index information and the presence or absence of the start instruction is monitored. If the start instruction is received before the reading of index information is completed, Control means for interrupting reading of the index information and starting reproduction of the optical disc;
An optical disc playback apparatus comprising:   3. The optical disc reproduction according to claim 2, wherein when the reading of the index information is interrupted, the control means stores the interruption position, and then causes the index reading means to resume reading the index information from the interruption position. apparatus.   The control means determines whether or not the reading of the index information is completed when the search instruction is issued, and immediately determines when the reading is completed and when the reading is not completed, the index 4. The optical disk reproducing apparatus according to claim 2, wherein after the preaching means completes the reading, a search process corresponding to the search instruction is executed.

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