JP5682167B2 - Video / audio recording / reproducing apparatus and video / audio recording / reproducing method - Google Patents

Description

  The present invention detects a commercial message (Commercial Message, hereinafter referred to as CM) sandwiched between main parts of a recorded television broadcast program in parallel with the recording of the television broadcast program, and skips the commercial message portion. The present invention relates to a video / audio recording / reproducing apparatus and a video / audio recording / reproducing method.

  Television broadcasts can be classified into “program main section” and “commercial message section” based on the contents. In the case of a movie program, the main program section is a broadcast portion based on video / audio data of the content of the movie itself. On the other hand, the commercial message section (hereinafter referred to as the CM section) is a broadcast portion based on video / audio data provided by the client who has contracted with the broadcasting station by a client or an advertiser or other client. It is broadcast between the main sections. The CM section also includes a broadcast for the broadcast station to advertise itself. In many cases, the relationship between the program main section and the CM section is rarely related, and for viewers who want to concentrate on viewing the main program section, when recording a television broadcast or recording a television broadcast, When viewing, there is a desire to delete the CM section efficiently or to skip it.

  In a conventional video recording / playback apparatus, when a user watches a recorded television broadcast, the CM section in the recorded program cannot be known in advance, and the CM section can be used by using the fast-forward button on the remote control. Had to be manually skipped and played.

  Thus, a method has been devised for distinguishing between the main program section and the CM section when recording a television broadcast. For example, a conventional video / audio recording apparatus detects an audio system of television broadcasting, and identifies a program main section and a CM section based on the detected audio system. The audio system of the main part of the program is often monaural audio or bilingual audio (such as Japanese and English in a Western movie). In general, the audio system of the CM section is often stereo audio. By utilizing such a difference in the audio system, the section in which stereo sound is detected is determined as the CM section, and the recording of the CM section is not performed at the time of recording (that is, deleted), or the CM section is not used at the time of viewing. The process of skipping (that is, skipping) was performed.

  However, the conventional CM detection method does not function when the audio system in the main program section is the same stereo sound as the audio system in the CM section. As an improvement measure, there is a proposal for specifying a CM section by detecting a full-screen black frame image called a “black frame” inserted at the boundary between the main program section and the CM section (see, for example, Patent Document 1). ). There is also a proposal for detecting a silent section that occurs at the boundary between a main program section and a CM section, and specifying a CM broadcast section from the appearance interval of the detected silent section (see, for example, Patent Document 2). There is also a proposal for extracting a CM section using the frequency of occurrence of a scene change in a video (see, for example, Patent Document 3). In addition, there is also a proposal for providing a user interface that skips (ie, skips) a fixed time such as 15 seconds by the user's button operation during viewing. There is also a proposal for specifying a CM section simultaneously with the recording of a program (see, for example, Patent Document 4).

  In recent years, a so-called time-shift playback or chasing playback method is known, in which a television broadcast program is recorded on a recording medium, and the recorded video is played and the program is viewed. In such time-shifted playback, when the recorded video is viewed, the playback of the CM section is skipped, and when the video gradually approaches the received video of the television broadcast, the recorded video is broadcast from the viewing It is desirable to switch to the video that is being used. For example, when viewing the program being recorded from the recorded media, the playback time of the program being played is close to the time of the broadcast being received and the content being broadcast is being played back There is a proposal that, when the content is the same CM, the playback from the recorded medium is interrupted and switched to broadcast viewing (for example, see Patent Document 5). In such a time shift reproduction method, the CM section is detected by using the difference in the audio system as described above and the scene change occurrence frequency.

JP-T 8-507633 (pages 12-15, FIG. 1) Japanese Patent Laying-Open No. 2003-47031 (page 5-8, FIG. 1) Japanese Patent Laying-Open No. 2000-16596 (page 7, FIG. 14) JP 2007-049515 (page 7-10, FIG. 2) JP 2005-198203 (page 10)

  However, in the conventional time-shifted playback method, when a program being recorded is played back in parallel with the recording of a television program, if it is a continuous playback, whether the program being played is a main section such as a movie or CM Although it can be distinguished whether it is a section, when an arbitrary position of a program is designated as a reproduction start position, it is difficult to determine whether the reproduction start position is a main section or a CM section. For this reason, particularly in the vicinity of the end position where the program can be played back, if the designated playback start position is a CM section, this position cannot be determined as a CM section, and as a result, playback with a skipped CM section cannot be performed. there were.

  The present invention has been made to solve the above-described problems, and its object is to reproduce a program being recorded in parallel with the recording of a television broadcast program in the vicinity of the playback end position of the program being recorded. Is to provide a video / audio recording apparatus that identifies a CM section and reproduces a CM skip playback or only a CM section.

The video / audio recording / reproducing apparatus according to the present invention comprises a recording means for recording video / audio data, a transition point detecting means for detecting a predetermined transition point of the video / audio data, and a CM pattern length set in advance as a commercial message pattern. And the interval between transition points detected by the transition point detection means based on the CM end time length set as the length that the commercial message pattern is not likely to continue is the commercial message section. Based on the determination information related to the commercial message section from the CM section determination means, the video / audio data recorded in the recording means is reproduced without reproducing the commercial message section. A video / audio recording / reproducing apparatus comprising: Two combinations in which the time length from the reproduction start position to the reproduction end position becomes the maximum among the CM pattern lengths when the reproduction of the video / audio data recorded in the recording means from an arbitrary position is started and If it is smaller than the sum of the CM end time lengths, the section from the playback start position to the playback end position is not played back.

The video / audio recording / reproducing method according to the present invention includes a recording step for recording video / audio data, a transition point detecting step for detecting a predetermined transition point of the video / audio data, and a CM set in advance as a commercial message pattern. Based on the pattern length and the CM end time length set as the length that the commercial message pattern is not likely to continue, the interval between the transition point detected in the transition point detection step is a commercial message section. And the audio / video data recorded in the recording step without reproducing the commercial message section based on the determination result relating to the commercial message section in the CM section determining step. A video / audio recording / reproducing method comprising: Thus, when the reproduction step starts reproduction from the arbitrary position of the video / audio data recorded in the recording step, the time length from the reproduction start position to the reproduction end position is the CM pattern length. The section from the reproduction start position to the reproduction end position is not reproduced when it is smaller than the sum of the two largest combinations and the CM end time length.

In case of reproducing the program being recorded in parallel with the recording of Te revision broadcast program, for the near reproduction end position of the recording in the program, identifying the CM segment can be a CM skip reproduction.

1 is a block diagram showing a configuration of a video / audio recording / reproducing apparatus according to Embodiment 1 of the present invention; FIG. It is the figure which showed the example of CM area in Embodiment 1 of this invention. It is explanatory drawing of CM detection processing in Embodiment 1 of this invention. It is a table of CM patterns in Embodiment 1 of this invention. It is a block diagram of the CM detection part in Embodiment 1 of this invention. It is a transition point stack table in Embodiment 1 of this invention. It is explanatory drawing of CM detection processing in Embodiment 1 of this invention. It is a flowchart of the CM detection processing procedure in Embodiment 1 of this invention. It is a flowchart of the CM detection processing procedure of the program in recording in Embodiment 1 of this invention. It is explanatory drawing of the jump process with respect to the program in recording in Embodiment 1 of this invention. It is a follow chart figure which shows the operation | movement flow of the jump process with respect to the program in recording in Embodiment 1 of this invention. It is explanatory drawing of the jump process with respect to the program in recording in Embodiment 1 of this invention. It is explanatory drawing of the jump process with respect to the program in recording in Embodiment 2 of this invention. It is the figure which showed the example of the CM area in Embodiment 2 of this invention It is a block diagram of the CM detection part in Embodiment 3 of this invention. It is explanatory drawing of CM detection processing in Embodiment 3 of this invention. It is a flowchart of the CM detection processing procedure in Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a block diagram schematically showing a configuration of a video / audio recording / reproducing apparatus 100 according to Embodiment 1 for carrying out the present invention. The video / audio recording apparatus 100 includes a tuner 5 that selects a broadcast program to be recorded from a broadcast wave received by an antenna 91, a reception processing unit 6 that selectively extracts data necessary for recording from a signal output from the tuner 5, and The AV stream extracted by the reception processing unit 6 is temporarily stored in the input stream buffer 8, and the recording unit 11 is provided with an input stream control unit 7 for recording without underflow or overflow. The video / audio recording / reproducing apparatus 100 also includes an address information generating unit 9 that generates address information for associating the reproduction time information and the address position with respect to the reproduction access unit of the AV stream recorded in the recording unit 11, And an address map management unit 10 that manages each address information generated by the unit 9 as an address map having one or more for each AV stream or program. Further, the present video / audio recording / reproducing apparatus 100 is also used when an AV stream is input from the network terminal 15 via the Internet 92 in addition to the tuner, or when an analog video / audio signal is input from the external input processing unit 16. Correspond.

  In the case of an analog video / audio signal, it is necessary to encode the video / audio signal in order to record an AV stream in the recording unit 11. Although not shown, the encoding unit 14 converts a digital video / audio signal obtained by A / D converting an analog video / audio signal into an MPEG-2 (Motion Picture Export Group) format or an H.264 format. Convert to H.264 format. The encoding unit 14 is also used to recompress MPEG-2 data received as a digital broadcast for the purpose of changing the encoding rate and the like. The recording unit 11 shown in FIG. 1 may be an HDD or another information recording medium such as an optical disk such as a DVD or a magnetic tape. The audio / video recording apparatus 100 may be a receiver or a DVD / HDD hybrid recorder that receives and records a broadcast program. Furthermore, the video / audio recording apparatus 100 is not limited to a home video recorder, but can be applied to various uses such as a personal computer, a video server, or a surveillance recorder for a surveillance system. Hereinafter, the configuration and operation method of the video / audio recording / reproducing apparatus 100 according to the present embodiment will be described.

<System part explanation>
The remote control receiving unit 2 receives an infrared signal from the remote control, converts it into a control signal, and sends it to the system control unit 1. The system control unit 1 manages the state of the system, and issues a recording or playback request instruction to the recording control unit 3 or the playback control unit 4 in response to a recording request or playback request from the user. The recording control unit 3 controls the tuner 5, the reception processing unit 6, the encoding unit 14, the input stream control unit 7, and the address map generation unit 9 to perform recording processing.

<Reproduction part explanation>
The video / audio recording / reproducing apparatus 100 has a reproduction function. The output stream control unit 12 reads the AV stream recorded in the recording unit 11 into the output stream buffer 13. The decoding unit 18 decodes the AV stream output from the output stream control unit 12 and converts it into a digital video signal. The monitor output terminal 17 outputs a digital video signal to the monitor 93. Data formats to be output include RGB and YCbCr signals compatible with the HDMI interface, and composite signals and component signals that are analog video output signals.

<Input and output stream buffers>
The encoded stream written in the recording unit 11 corresponds to a variable rate, and the amount of code (bit rate) generated per second varies greatly with time. Therefore, the input stream control unit 7 temporarily holds the AV stream in the input stream buffer 8 so that the AV stream to which data is written to the recording unit 11 does not overflow or underflow, and the recording unit 11 enters the state of the recording unit 11. Accordingly, the writing control of the AV stream to the recording unit 11 is performed. The input stream buffer 8 is composed of a ring buffer, and a valid data area is managed by a write position pointer and a read position pointer. That is, at the time of data writing, writing for the data size is performed with the writing position pointer at the head, and the writing position pointer is advanced by the written data size. On the other hand, at the time of data reading, reading for the data size is performed starting from the reading position pointer, and the reading position pointer is advanced by the read data size. However, when the end position of the ring buffer is reached, processing for returning the pointer to the head position is performed. Similarly, when the AV stream recorded in the recording unit 11 is decoded, the output stream control unit temporarily stores the AV stream required by the decoding unit 18 so that it can be supplied when necessary. Read in advance to the output stream buffer 13. Thereby, decoding of the AV stream can be performed continuously.

<Recording operation>
Next, an operation for recording a broadcast program will be described. When the user manually presses the recording start button or when the recording start time set in advance by the recording timer is reached, the system control unit 1 sends an instruction to the recording control unit 3 to start recording. . The recording control unit 3 instructs the tuner 5, the reception processing unit 6, the input stream control unit 7, the address information generation unit 9, and the decoding unit 14 to start recording when the input signal is an analog signal. In response to this instruction, the tuner 5 selects a designated channel from the broadcast wave received by the antenna 91. The signal wave output from the tuner 2 is sent to the reception processing unit 6 and converted into a digital video signal and a digital audio signal. The recording control unit 3 instructs the encoding unit 14 to perform encoding when it is analog data at the start of recording or when re-encoding is necessary. The input stream buffer 8 managed by the input stream control unit 7 records AV streams as encoded data one after another, and the input stream control unit 9 matches the write timing of the recording unit 11 with the input stream buffer 8. Is temporarily transferred to the recording unit 11, and the recording unit 11 records the AV stream.

  Each time a GOP (Group of Pictures), which is an encoding unit, is written in the input stream buffer 8, the input stream control unit 7 sends a reproduction start time and data corresponding to the recorded GOP to the address information generation unit 9. Send address information. The address map management unit 10 holds a pair of time information and address information generated by the address information generation unit 9 in units of programs or AV streams, and periodically or when an event such as recording end or recording interruption occurs. To record.

  The input stream control unit 7 that has detected the GOP also sends the recorded GOP information to the CM detection unit 20, and the CM detection unit 20 temporarily records it in the input stream buffer 8 based on the GOP information. The AV stream is analyzed, and a CM block that is a CM fragment or a CM group including a plurality of CM blocks is detected. Here, the CM block indicates one set of content created for advertising a certain product or service to the viewer, and a CM group is a combination of one or more CM blocks. A CM group sandwiched between the main section and the main section is called a CM section. Information on the CM section detected by the CM detection unit is recorded in the recording unit 11.

<CM detection part explanation>
The video / audio recording / reproducing apparatus 100 generates CM information to be recorded based on a CM detection unit 20 for detecting a CM that is a feature section and information on the CM section detected by the CM detection unit 20. The management unit 21 and a recorded program CM information database (CMPr) 22, which is a database for providing CM information to the playback control unit 4 in order to realize skipping of the CM section with respect to the program once recorded. In order to realize skipping of the CM section for the program being recorded, the CM information database (CMPt) 23 for the program being recorded which is a database for providing CM information to the reproduction control unit 4 is provided.

<Playback operation>
Next, the reproduction operation will be described. When the user issues an instruction to start playback of an arbitrary program to the system control unit 1 through a remote controller or the like, the system control unit 1 instructs the playback control unit 4 to start playback of the designated program. The reproduction control unit 4 reads the address map of the program to be reproduced from the recording unit 11 and develops it in the address map management unit 10. The playback control unit 4 manages the playback elapsed time. Based on the time information to be played next, the playback control unit 4 queries the address map management unit 10 for address information corresponding to the time information, and outputs the stream control unit 12. Is instructed to read out data from the recording unit 11 to the output stream buffer 13. When the reading is completed, the playback control unit 4 sequentially inquires the address map management unit 10 about the address data to be read next, and reads the AV stream to the output stream buffer 13 one after another. The decoding unit 18 reads AV stream data to be decoded from the output stream buffer 13 as necessary, and performs decoding. The decrypted data is output from the monitor output terminal 17 to the monitor.

<CM skip playback>
Next, CM skip reproduction will be described. FIG. 2 is a diagram showing an example of the start time and end time of the CM group in the program according to the present embodiment. Assume that a program having a recording time of 30 minutes is requested, and the CM section information of the program has the contents shown in FIG. Upon receiving the reproduction instruction from the system control unit 1, the reproduction control unit 4 instructs the address map management unit 10 to read the address map recorded in the recording unit 11, and sends the CM information from the recording unit 11 to the CM information management unit 21. An instruction to read the recorded program CM information database 22 is issued. The playback control unit 4 determines the section to be played back based on the CM section information read from the recorded program CM information database 22. In the case of the CM information shown in FIG. 2, from 0:00:07 to 0:12:15, from 0:14:15 to 0:28:00, from 0:29:45 to 0:30: The three sections up to 00 are the sections to be reproduced. The section to be reproduced may be managed as a temporary program (play list). Further, it may be determined whether the reproduction should be performed sequentially by checking the elapsed reproduction time and the section to be reproduced. The playback control unit 4 continues playback based on the determined playback section. In order to realize playback with skipping a CM section, even if a method of playing only a previously created playback section is used, whether or not it is a playback section for each section to be played next while performing playback, is skipped. The method of determining whether it is the area to perform may be sufficient.

<CM detection process>
Next, a method for detecting a CM section will be described. First, the basic principle for detecting CM will be described. FIG. 3 is an explanatory diagram for explaining the basic principle of the CM detection processing in the present embodiment. In FIG. 3, the horizontal axis represents time, and the vertical axis represents a scene change, a phenomenon in which silence occurs, and the like as transition points when analyzing video and audio of a program to be recorded. The timing at which the transition point occurs is 30a to 30i. Note that the transition point may be a scene change alone, silence alone, or an event given from the outside. As an event given from the outside, for example, there is an audio change signal from a tuner connected to the outside of the video / audio recording / reproducing apparatus.

  FIG. 4 is a CM table showing CM patterns prepared in advance for detecting CMs. Here, six types (PTa to PTf) of examples of CM patterns are shown, and the time interval and GOP interval between adjacent displacement points are respectively determined. If the transition point interval coincides with any time interval or GOP interval pattern of the CM table shown in FIG. 4, each transition point interval is determined as a CM block. If two or more CM blocks are continued, it is determined as a CM group, and a CM group is detected and recognized as a CM section. For example, in FIG. 3, since there are four corresponding CM patterns for each interval of transition points from 30c to 30g, each transition point interval is determined as a CM block, and four CM blocks are consecutive. Therefore, 30c to 30g are detected as CM groups. In the CM table, the CM end time length PTx is also written as the length that the CM pattern is not likely to continue. When the change point interval matches this PTx, the section is determined to be the main section. Next, actual CM detection processing will be described in detail.

<Details of CM detection processing>
FIG. 5 is a block diagram showing details of the CM detection unit 20 of the present embodiment. In FIG. 5, the CM detection unit 20 acquires the AV stream temporarily recorded in the input stream buffer 8 in units of GOP, the silence detection unit 25 performs silence, and the scene change detection unit 24 performs video scene change. To detect. As a method of detecting a scene change, a method of decoding a coded AV stream and determining a scene change from correlation between histograms of previous and subsequent frames, a type of a coded picture of an AV stream, a motion vector, or a code amount There is a method to obtain a scene change from the fluctuation of the scene. Silence detection may determine that silence has occurred if a section with a low audio output level of the decoded AV stream continues for a certain period (for example, 0.5 seconds) or longer. The occurrence time of the scene change detected by the scene change detection unit 24 is sent to the transition point detection unit 26. In addition, silent time information detected by the silence detection unit 25 is also sent to the transition point detection unit 26. The transition point detection unit 26 determines the time at which a scene change and silence occur simultaneously as a transition point.

  FIG. 6 shows an example of the transition point stack table 29 held in the CM detection unit 20. This displacement point stack table includes a transition point valid / invalid flag, a transition point GOP number, a connection end GOP number, a transition point counter value that is the number of transition points detected as consecutive CMs, and a silent time of the detected transition point. The scene change difference value indicating the length and the change amount of the scene change is shown, and information on transition points detected by the CM block and CM group determination unit 27 is sequentially stored as will be described later.

  The CM block and CM group determination unit 27 in FIG. 5 determines the interval between the transition points of the transition point stack table 29 shown in FIG. 6 based on the preset CM table 28 shown in FIG. If it matches the CM pattern described in the above, the interval between the transition points is determined as a CM block. When a plurality of CM blocks are continuous, the section is set as a CM group.

  FIG. 7 shows transition points detected by the unvoiced sound detection unit of the CM detection unit. In FIG. 7, (a) represents a silence detection unit, (b) represents a scene change detection unit, (c) represents a transition point detected by a transition point detection unit, and (d) represents a CM block by a CM determination unit. The determined interval, (e), represents a section determined as a CM group by the CM determination unit.

<CM detection processing flow>
FIG. 8 is a flowchart showing a CM detection processing procedure in the present embodiment. The CM detection processing procedure in the CM block and CM group determination unit 27 will be described with reference to FIG. When a transition point where a scene change and a silent section occur simultaneously is detected in the transition point detection unit 26, the information is sent to the CM block and CM group determination unit 27, whereby the CM block and CM group determination unit 27. The operation starts (step S401). Information on the detected transition point is stored at the end of the transition point stack table 29 in the CM block and CM group determination unit 27 (step S402). Next, the reading base point of the transition point stack table 29 is set (step S403). In FIG. 7C, if, for example, the process of the transition point 33a has been completed last time, the next transition point 33b is set as the first base point this time. Next, the end point side of the transition point is set (step S407). In FIG. 7C, the transition point 33c is the end point. If there is no transition point as the end point in the transition point stack table 29 (step S408), the next base point is acquired (step S404). In FIG. 7C, when the base point is the transition point 33a and the end point is the transition point 33i, the base point is changed to the transition point 33b. If the next base point is not found (step S404), the CM detection process is terminated (step S406). When the base point and the end point are determined, the time length from the base point to the end point is obtained (step S409). In FIG. 7C, when the base point is the transition point 33b and the end point is the transition point 33c, the GOP number “10” of the base point and the GOP number of the end point are understood from the change point stack table shown in FIG. 30 GOP which is a difference from “40” (that is, a transition point interval) is a time length. If this time length matches any of GOP intervals 30 GOP, 60 GOP, 120 GOP, and 240 GOP among the patterns described in the CM table shown in FIG. The end GOP number is replaced with the end connection end GOP number (step S411). Further, the valid / invalid flag at the end point is invalidated (step S412), and the transition point count of the base point is incremented by one (step S413). If it is determined in step S410 that it is not the CM reference time length, then if the time length between the base point and the end point is set to 300 GOP as the CM end time length PTx, for example, the CM end time length It is determined whether or not PTx is exceeded (step S414), and if it is determined that it exceeds, the CM broadcast section is determined from the base point to the connection end GOP number, and CM information that is information on the CM broadcast section Is sent to the CM information management unit 21 (step S415). Further, the base point of the next CM broadcast section detection process is set to the transition point next to the final transition point of the current CM broadcast section, and the valid / invalid flag of the transition point before the detected final transition point is invalidated ( Step S416).

  By continuously executing steps S404 to S416 as described above during the recording operation, the CM section of the broadcast program to be recorded can be detected in real time. The time information of the CM section detected by the CM block and CM group determination unit 27 is transferred to the CM information management unit 21 and recorded in the recording unit 11.

  The CM end time length PTx specifies 300 GOP, but is not fixed to this value. Further, the CM end time length PTx may be the maximum value of the CM table, for example, in the case of FIG. 4, MAX {PTa,..., PTf}, that is, PTf.

<CM detection during auto play>
A case where CM skip reproduction is executed for a program that is recording will be described. The CM information detected by the CM detection unit 20 during the recording is recorded in the CM information database (CMPt) 23 for the program being recorded. When it is desired to execute CM skip reproduction for the program being recorded, the reproduction control unit 4 reproduces the program by referring to the CM information database (CMPt) 23 for the program being recorded via the CM information management unit 21. It can be determined whether or not the section is a CM.

  Next, a CM section detection procedure during recording will be described. FIG. 9 is a flowchart showing a CM detection processing procedure for a program being recorded. The flowchart shown in FIG. 9 is obtained by adding the step of provisional CM output processing (step 517) to the flowchart shown in FIG. In step 517, every time one CM block is detected, the CM section of the CM block, all the detected sections, and at least one CM information of an arbitrary CM section are stored in the CM information database for recorded program (CMPt). ) 23. That is, in the CM section detection process during recording, the contents of the CM information database for recorded program (CMPt) 23 are updated by updating the CM information database for recorded program (CMPt) 23 every time a CM block is detected. Is up to date.

  Next, a description will be given of a case where it is necessary to jump to an arbitrary position in response to a request from the user in CM skip playback during recording. FIG. 10 is an explanatory diagram of the availability reversal process when the jump process is performed on the program being recorded in the present embodiment. In FIG. 10, CMG (i) t and CMG (i) e indicate the start and end positions (time?) Of the i-th CM section, respectively. As shown in FIG. 10 (a), it is a section before a final CM section (CMG (i + 1) t) to CMG (i + 1) e) from a certain playback position, and is the previous CM section (CMG (i)). When jumping from t) to CMG (i) e) (in the case of (a) in FIG. 10 (a)), it is already determined that the jump destination is not the CM section. It can be seen that the playback may be performed from the position where it was made. On the other hand, when it is necessary to jump from a certain playback position to a section after the last CM section (CMG (i + 1) t) to CMG (i + 1) e), from CMG (i + 1) e to the end of playback of the program being recorded It is not determined whether or not there is a CM. Here, the difference between the arbitrary jump position and the playback end position of the program being recorded is defined as a playback availability determination section N. In this case, it is impossible to determine whether or not to reproduce from the jumped position. Here, the playback end is the last position where a recorded program or a program being recorded can be played back. In the case of a recorded program, the reproduction end point generally indicates the final position of all recorded data. On the other hand, the playback end of the program being recorded does not indicate the end of the AV stream itself that is the received broadcast data or the end of the recompressed AV stream, but the AV already recorded in the recording unit 11. The address information corresponding to the stream is also prepared, and indicates the final position of the area that can be reproduced even when the reproduction control unit 4 performs the reproduction operation including special reproduction. Therefore, in the case of a program being recorded, it increases every moment.

  Therefore, a threshold value Nd for determining whether or not playback is possible is provided for the playback permission determination fixed section N. That is, when the latest undecided section N is larger than Nd, reproduction is possible (FIG. 10B), and when it is smaller than Nd, reproduction is judged impossible (FIG. 10C).

  As the set value of Nd, for example, the maximum value 120 seconds of the CM pattern of the CM table shown in FIG. 4 may be used. In this case, since the latest undetermined section exceeds the general maximum CM length of 120 seconds, there is almost no possibility that a longer CM exists, and it is determined that the CM group is completed. May be. In this case, if the latest undetermined section is a CM, it is possible to skip and reproduce the CM with high probability. On the other hand, if the latest undetermined section is less than 120 seconds, it cannot be determined that it is a CM. Therefore, there is a case where the latest undecided section has to be reproduced as a result.

  As another set value of Nd, for example, the CM pattern of the CM table shown in FIG. 4 may use a minimum value of 5 seconds or 15 seconds. In this case, in order to determine that it is not a CM if the latest undecided section exceeds 5 seconds or 15 seconds, it is possible to reduce a problem that the main section is erroneously determined as a CM section and skipped or not reproduced. On the other hand, the probability of occurrence of a problem of reproducing a long CM of 30 seconds or more is increased.

  Next, a description will be given of an operation procedure in the case of performing playback based on another position by time search or fast-forward operation when CM skip playback is being performed on a program being recorded. FIG. 11 is a follow chart showing an operation flow when jump processing is performed on a program being recorded in the present embodiment. When a reproduction request from an arbitrary position is transmitted from the user or the like to the system control unit 1 (step 601), the reproduction control unit 4 determines whether or not to reproduce according to the procedure shown in FIG. First, it is determined whether or not the playback position of the jump destination is within the CM group (step 602). If the jump destination is within the CM group, an error indicating that playback is not possible is displayed (step 606), and the process is terminated (step 608). On the other hand, if it is determined not to be a CM group, it is determined whether or not the jump destination is behind the final CM group (step 603). If it is determined that it is before the final CM group, a jump is made to the designated destination and reproduction is started (step 607). On the other hand, if it is determined in step 603 that it is after the last CM group, determination processing based on the latest undecided section time length shown in FIG. 10 and the above is performed (step 604). As a result of the determination process in step 605, if it is determined that reproduction is possible, the jump is made to the designated destination and reproduction is started (step 607). On the other hand, if it is determined that reproduction is not possible, an error indicating that reproduction cannot be performed is displayed (step 606), and the process is terminated (step 608).

Note that the control when the jump process described in FIGS. 10 and 11 is performed is performed by the reproduction control unit. This playback control unit
A difference detection unit for calculating a playability determination section N which is a difference between an arbitrary position to jump and a play end position of the program being recorded;
A playback start position determination unit that determines whether or not the playback position of the jump destination is within the CM group (step 602) and determines whether or not the playback position of the jump destination is behind the last CM group (step 602);
Also, a playback start determination unit is provided that compares the playback availability determination section N with the threshold value Nd to determine whether playback is performed from the playback position at the jump destination (S607).

  Next, a description will be given of a method for determining whether or not playback is possible when playback at another position is performed by time search or fast-forward operation when CM skip playback is being performed on a program being recorded. FIG. 12 is an explanatory diagram of the availability inversion processing when performing jump processing for the program being recorded in the present embodiment. In order to determine whether or not playback is possible, a playback prohibition section Np, which is a threshold value, is defined. Using this playback prohibition section Np, if the playback permission section N is longer than the playback prohibition section Np, playback is permitted. On the other hand, if it is short, reproduction is prohibited. The reproduction prohibition section Np is composed of a combination of CM patterns assumed as a CM group. For example, a time obtained by adding the CM end time length PTx to the maximum transition point interval (CM length) that can be obtained by combining two types of CM patterns, which are the minimum combinations in the CM table, is given as a candidate for Np. In FIG. 4, PTf + PTf + PTx = 390 seconds. In other words, if the playability determination interval N is shorter than 390 seconds, the CM group may be generated and playback is not permitted. On the other hand, if the time length exceeding 390 seconds exists, the CM group It is considered that the possibility of occurrence is extremely low, and reproduction is permitted.

  As described above, according to the video / audio recording / reproducing apparatus according to the present embodiment, the CM information in which the CM section is detected by the CM detection unit can be read from the CM information database for the program being recorded even during recording. It can be determined whether or not the section to be reproduced is a CM section. In particular, it is possible to determine whether or not the playback end position of the program being recorded is also a CM section.

  Further, since it is possible to determine whether or not all playback positions including the playback end position of the program being recorded are CM sections, special playback such as jumping to an arbitrary position is possible.

  Also, when a jump to an arbitrary position is requested while playing a program being recorded while skipping the CM section, or when the jump destination is near the end of playback of the program being recorded By comparing the difference between the detected end position of the latest CM group and the playback end position of the program being recorded with a preset threshold value, it can be determined whether or not the section can be played back. If the difference is shorter than the threshold value, the section can be determined as CM and reproduction can be prevented. In this case, it can be determined whether or not playback from the end position of the latest CM to the playback end position of the program being recorded should be relatively easily performed.

  In particular, the closer to the CM group, the higher the possibility that the data at that position is a CM. Therefore, by determining the position difference from the end position of the CM group, it can be more accurately determined whether or not it is a CM. Therefore, when the CM section is skip-reproduced with respect to the program being recorded, it is possible to jump based on the above determination even near the end of reproduction of the program being recorded.

  An arbitrary CM pattern may be used as a threshold for comparing the difference between the detected end position of the latest CM group and the playback end position of the program being recorded. For example, the shortest CM pattern (5 seconds or 15 seconds in the case of FIG. 4) is adopted, and the difference between the detected end position of the latest CM group and the playback end position of the program being recorded is compared. If the difference is shorter than the shortest CM pattern, which is the threshold value, it is determined that the CM is a CM and reproduction is not performed. In the case of individual pieces, not only the CM but also the main part is very fragmented, so that it is possible to prevent the reproduction of contents that are difficult to recognize as a program. Further, the longest CM pattern (120 seconds when taking FIG. 4 as an example) may be employed as the CM pattern as the threshold. In this case, most CMs may enter the target section, and even if 120 seconds or less are reproduced, sufficient information cannot be obtained as program contents. Can be.

  On the other hand, a combination of CM patterns can be used as a preset threshold value. By setting the threshold value in this way, it can be determined whether or not the section can be reproduced. Since it is based on whether or not the section matches the combination of CM patterns, it can be determined whether or not it is a CM section more accurately. As a result, when skipping the CM section for the program being recorded, it is possible to jump to any position including the vicinity of the playback end of the program being recorded.

  In addition, by adopting a combination of any two CM patterns as the threshold, the section can be made equivalent to a CM section. For example, the maximum value of the combination of two CM patterns is 120 seconds + 120 seconds = 240 seconds in FIG. In other words, it is possible to detect a CM group having a maximum time length composed of two CM blocks, which usually exceeds 240 seconds, and to skip an area that may include a CM group composed of two arbitrary CM blocks. Is possible.

  Further, a combination CM end time length PTx of any two CM patterns may be added as a threshold value. In other words, by setting 120 seconds + 120 seconds + 150 seconds = 390 seconds, it is possible to perform playback while skipping an area that takes into account the detection delay of the CM group.

  Further, if the difference between the detected end position of the latest CM group and the playback end position of the program being recorded is the same as the combination of CM patterns, a process for determining a CM may be added.

  In the present embodiment, the threshold value of the reproduction prohibited section is combined with the CM pattern having the maximum length and the CM end time. However, the present invention is not limited to this combination. For example, if it is desired to shorten the length of the reproduction prohibited section, 130 seconds or 150 combining two CM patterns PTa or PTb having the minimum length and PTf which is the maximum length of a normal CM. It may be seconds. Any one CM pattern may be used. The threshold setting is characterized in that it can be set in combination with a CM table, and it can be more accurately determined whether or not it is a CM by determining from the similarity to the CM pattern.

  In the present embodiment, the shorter the difference between the playback end position of the program being recorded and the end position of the latest CM group, the more CM is determined. This utilizes the fact that the CM group is shorter than the length of the main part. By using this characteristic, it is possible to determine whether or not the CM is accurately between the end position of the latest CM group and the playback end position of the program being recorded.

  On the other hand, when a position distant from the latest CM group is reproduced next, there is a high possibility that the next CM group is started. For this reason, another threshold (such as the length that the main section is broadcast continuously) is set for the difference between the arbitrary jump position and the playback end position of the program being recorded, and the jump position is the latest CM group. If the jump position is between a position above a certain threshold and the end of playback of the program and the jump position exceeds another threshold with respect to the time distance from the latest CM group end position, A process for determining a CM group of the above may also be considered.

  Furthermore, as the position near the playback end of the program being recorded is to be played, there is a high possibility that the CM detection unit 20 has not yet determined whether or not the playback position is a CM section. Therefore, when it is not desired to show the CM as much as possible to the viewer, it is effective to determine the CM section according to the position information from the playback end of the program being recorded.

  In the present embodiment, the case where the CM is skip-played has been mainly described, but it is needless to say that it can be used to determine whether or not the CM is also played when only the CM is played.

  In this embodiment, the feature section is specified as CM. However, the CM detection unit specializes in specific contents such as music, conversation, news, sports highlight scenes, drama feature scenes, and the like. By changing to the one having the detection processing, it is possible to reproduce only a specific section during recording as in the present embodiment.

Embodiment 2. FIG.
The second embodiment of the present invention shows another method of CM determination processing in the video / audio recording / reproducing apparatus shown in the first embodiment. The configuration of the video / audio recording / reproducing apparatus in the present embodiment is the same as that of the first embodiment. In this embodiment, when the skip playback of the CM section is being executed for the program being recorded, the CM detection unit determines that the CM is the CM for the section being played, and the CM information management unit Notification is performed, and the CM information is newly added to the CM information database for the program being recorded.

  FIG. 13 is an explanatory diagram when the jump process is performed on the program being recorded in the present embodiment. FIG. 14 is a diagram showing an example of the start time, end time, and boundary time of the CM group in the program according to the present embodiment. Assume that a new CM section is added to the CM information database for the program being recorded as described above when skip playback of the CM section is executed for the program being recorded. The playback control unit reads CMG (i), which is the added CM section, and confirms that the current playback position is between CMG (i) t and CMG (i) e (FIG. 13). (B)). At this time, the playback control unit can recognize that the playback position is in the CM section, but it is unclear at which timing the jump can be made outside the CM section. For example, if a jump is started in one CM, a program or CM whose contents are divided is shown to the viewer, which may give a sense of incongruity. Therefore, in the present embodiment, as shown in FIG. 14A, even if the boundary position information is newly added to the detected CM section information as boundary information, the boundary position is recognized. By jumping out of the CM section, it is possible to make a very smooth transition that does not give the viewer a sense of incongruity. As a candidate for a boundary, a position where a large change in information may be adopted, such as a position where a large change in video occurs, a position where silence occurs, or a PAT or PMT in an MPEG stream.

  By performing such control, as shown in FIG. 13C, even if it is recognized that the playback position is CM during playback, CMG (i) p (1) which is the boundary position is recognized. Until normal playback or the playback state that was being executed is continued and CMG (i) p (1) is reached, transition to CMG (i) e is added without giving the viewer a sense of incongruity. Playback can be continued corresponding to the received CM information.

  As described above, according to the video / audio recording / reproducing apparatus according to the present embodiment, when the program being recorded is being reproduced, the reproduction control unit reads the CM information read from the CM information database for the program being recorded and If the current playback position is coincident, that is, if it is determined that the CM section is being played back, in order to have not only the start and end position information of the CM group but also a plurality of boundary position information , The original position to jump can be determined. That is, the jump timing can be specified.

  Further, the boundary time information of the CM group is generated based on the transition point, that is, the boundary time information is often the boundary of each CM block. In other words, when the section being played matches the CM section, if you want to skip that CM section, the jump is made with the CM block boundary as the jump source. Unnecessary sound is not generated when playback is interrupted. That is, it can be played very smoothly.

  Further, since the CM information includes boundary information in addition to the position information of the beginning and end of the CM, by using this boundary information as a jump destination position, it is possible to jump arbitrarily by a skip button or the like. As a result, the user can easily access an arbitrary CM block.

  In addition, by using boundary information generated based on video and audio information, such as video changes and sound silence, as the boundary information, the video and audio can be separated from each other as a jump destination or source. There is no sense of incongruity.

  Further, since the boundary information is based on the encoded information to be recorded, for example, PAT, PMT, etc. of the TS stream, decoding after jumping does not fail.

  In this embodiment, the CM group start and end time information and the boundary information between them are generated as CM information. However, the CM group information may be divided and output in units of CM blocks. (FIG. 14B). In this case, there is an effect that it becomes easier to grasp the position where the jump is possible.

  In the present embodiment, the CM is described as an example of the feature section. However, the CM detection unit may have specific contents such as music, conversation, news, sports highlight scenes, drama feature scenes, and the like. In addition to the specific section in addition to the start and end time information, by adding the boundary information by subdividing the extracted section and subdividing the extracted section into those having detection processing specialized for Because the jump destination and jump source of the playback position can be defined, a feature scene was detected during recording, and it was necessary to jump to the next jump destination or jump from any position into the feature section In this case, jump processing that does not give the viewer a sense of incongruity becomes possible.

Embodiment 3 FIG.
The third embodiment of the present invention shows another method of CM determination processing during recording in the video / audio recording / reproducing apparatus shown in the first embodiment. The configuration of the video / audio recording / reproducing apparatus in the present embodiment is the same as that of the first embodiment. The present embodiment is characterized in that the provisional CM output process of step 517 shown in FIG. 9 of the first embodiment is not necessary when the CM section skip reproduction is executed for the program being recorded. It is.

  In the first embodiment, as shown in FIG. 5, the CM detection unit activates CM determination by detecting a scene change of the video by the scene change detection unit and silence detection of the sound by the silence detection unit, and the CM is established. In other words, if a section in which the interval between transition points coincides with the CM pattern defined in the CM table of FIG. 4 continues, it is determined as a CM group. However, in order to detect the end position of the CM group, the transition point interval shown in step 414 of FIG. 9 needs to be larger than the CM end time length PTx. This means that if no transition point is detected after completion of the detection of the CM group, or if no transition point has occurred for a long time, the CM section detection is not completed (step S415) and recording is in progress. There is a problem that the latest CM information is not registered in the program CM information database 23, that is, in the CM skip playback for the program being recorded, the CM section near the playback end cannot be skipped for playback. For this purpose, some event for completing the CM section detection process is required.

  FIG. 15 is a block diagram showing details of the CM detection unit 20 of the present embodiment. The CM detection unit 20 in the form of Mr. Honji has a transition point generation management unit 36 for managing transition points generated during recording, and a transition point generation management unit in the CM detection unit shown in FIG. 5 of the first embodiment. And a dummy transition point generation unit 37 for newly generating a dummy transition point based on an instruction from.

  The transition point occurrence management unit 36 detects the recording elapsed time and acquires the latest transition point information from the transition point detection unit 26. For example, the current recording elapsed time from the time when the latest transition point occurs is When the CM end time length PTx shown in FIG. 4 is exceeded, an instruction is sent to the dummy transition point generator 37 to generate a dummy transition point. The dummy transition point generator 37 that has received an instruction to generate a dummy transition point generates a dummy transition point for completing the CM detection. This dummy transition point may be the same as the information of the normal transition point, or there may be additional information such as a flag for indicating a dummy. By providing a flag or the like for indicating a dummy, it can be prevented that the CM detection unit 20 and the CM block and CM group determination unit 27 erroneously determine that the segment is a normal CM break. In the above description, the dummy transition point is generated after the normal transition point is generated and waits for the CM end time length PTx to be exceeded. However, the waiting time for generating the dummy transition point is fixed to the CM end time length PTx. Not what you want. As the waiting time, an arbitrary time may be set in consideration of the constraints of the system. In addition, it is desirable to set the time information of the dummy transition point so that the time difference between the time information of the dummy transition point and the previous transition point does not match the CM pattern described in the CM table of FIG. For example, if the maximum length of the CM pattern, that is, in the case of FIG. 4, is set to a value exceeding 120 seconds, it does not match all the CM patterns and becomes longer than all the CM patterns. A section including a point is not erroneously determined as a CM section.

  In the above, the time information of the dummy transition point is set so as not to match the CM pattern. If the time difference between the dummy transition point and another transition point matches the CM pattern, the dummy transition point is set to CM. This is because it may be misrecognized as a new boundary of the group. In addition, dummy transition points may be periodically generated as dummy transition point generation timings. When the dummy transition point is generated periodically, it is not necessary to detect the normal generation timing of the transition point, so that the configuration can be simplified.

FIG. 16 shows transition points detected by the unvoiced sound detection unit of the CM detection unit. In FIG. 16, (a) is a silence detection unit, (b) is a scene change detection unit, (c) is a transition point detected by a transition point detection unit, and (d) is a CM determination unit and a CM block. The determined interval, (e), represents a section determined as a CM group by the CM determination unit.
If no transition point is detected after the CM group is completed, the CM detection process cannot be completed. As a result, the CM group 35 including CM1, CM2, and CM3 is recorded in the CM information database 23 for the program being recorded. As a result, the section of the CM group 35 cannot be skip-played. On the other hand, if there is a dummy transition point generated by the transition point generation management unit 36 and the dummy transition point generation unit 37 (33 dummy in FIG. 16), the CM group 35 is being recorded in order to satisfy the condition of step 414 in FIG. The program can be registered in the program CM information database 23. As a result, skip reproduction can be performed for the section of the CM group 35.

  FIG. 17 is a flowchart showing the CM detection processing procedure for the program being recorded in the present embodiment. FIG. 17 is the same as FIG. 8 except that after the start (step 401), transition point detection (step 731) and dummy transition point generation condition determination (step 732) are added. It is the same. The transition point occurrence management unit 36 in the CM detection unit 20 shown in FIG. 15 monitors the transition point occurrence state based on the detection result of the transition point detection unit 26 and the elapsed recording time. In FIG. 17, when there is no transition point (No in Step 731), the transition point generation management unit 36 performs a process for determining whether or not to generate a dummy transition point (Step 732). Here, if the difference between the playback end time of the program being recorded or the latest elapsed recording time of the program being recorded and the time when the latest transition point has exceeded the CM end time length PTx, the dummy transition point is set. Shall occur. The condition for generating the dummy transition point is not limited to the above, and may take an appropriate value other than the CM end time length PTx.

  The generated dummy transition point is processed according to the procedure after step 402 shown in FIG. Since the operation after Step 402 is the same as that in FIG. 8 of the first embodiment, a description thereof will be omitted. In step 414, since the time difference between the dummy transition point and the previous transition point is larger than the CM end time length PTx, it is determined that the CM section detection is completed (step 415), and the CM for the program being recorded is recorded. CM information is registered in the information database 23. As a result, the playback control unit 4 can perform playback while skipping the CM section even near the end of playback of the program being recorded.

  According to the video / audio recording / reproducing apparatus configured as described above, the CM information in which the CM section is detected by the CM detecting unit can be read out from the CM information database for the program being recorded even during recording, so that it becomes a reproduction target. It can be determined whether or not the section is a CM section. In particular, it is possible to determine whether or not the playback end position of the program being recorded is also a CM section.

  Further, since it is possible to determine whether or not all playback positions including the playback end position of the program being recorded are CM sections, special playback such as jumping to an arbitrary position is possible.

  Also, in the CM detection process executed for the program being recorded, even if the transition point generated by the scene change of the video or the silence of the audio does not occur after the actual CM section is completed, the transition is performed by itself. A point can be generated. As a result, the CM detection process can be completed even when a transition point generated by a video scene change or audio silence does not occur. Therefore, when skipping a CM section for a program being recorded, Jumping is possible even near the end of playback of the program being recorded.

  Further, in step 517 of FIG. 9 in the first embodiment, that is, every time a CM block is detected, provisional CM information does not need to be written into the CM information database for recorded program (CMPt). The frequency of CM block detection is higher than that of CM group detection. Therefore, it is effective to avoid or reduce that the CM information management unit that writes out the information and the reproduction control unit that reads out the information simultaneously perform the read / write operation on the CM information database CMPt). Accordingly, it is not necessary to implement an exclusive process in the CM information management unit or the reproduction control unit for avoiding such simultaneous read / write operations.

  In the present embodiment, the timing for generating the dummy transition point is controlled in accordance with the generation of the original transition point, but it may be generated periodically regardless of the generation of the transition point. In that case, it goes without saying that the control algorithm and the like become simple and provide merit in mounting.

  Further, by setting the timing of generating the dummy transition point to be larger than the maximum CM pattern shown in the CM table of FIG. 4, CM detection can be performed without erroneously determining the dummy transition point as a normal transition point, resulting in malfunction. CM cut playback for a recorded program with a small amount of content becomes possible.

  Further, by controlling the timing at which dummy transition points are generated so as not to coincide with the CM pattern shown in the CM table of FIG. 4, it is possible to avoid recognizing the interval of transition points related to dummy transition points as CM blocks. can do. Therefore, CM cut reproduction for a recorded program with few malfunctions is possible.

  Also, by adding a special identifier to the dummy transition point, it is possible to avoid recognizing the interval between transition points related to the dummy transition point as a CM block.

  Furthermore, if the CM information is frequently written, the CM information database for the program being recorded (CMPt) must employ a storage medium having a high access speed such as a RAM, but the CM information writing frequency can be suppressed. Therefore, it is possible to use a flash memory or a hard disk with a low unit cost per byte, which is advantageous in cost.

1 system control unit, 2 remote control receiving unit, 3 recording control unit, 4 playback control unit, 5 tuner, 6 reception processing unit, 7 input stream control unit, 8 input stream buffer, 9 address information generation unit, 10 address map management unit 11 Recording unit 12 Output stream control unit 13 Output stream buffer 14 Encoding unit 15 Network terminal 16 External input processing unit 17 Monitor output terminal 18 Decoding unit 20 CM detection unit 21 CM information management , 22 CM information database for recorded program, 23 CM information database for recorded program, 24 scene change detection unit, 25 silence detection unit, 26 transition point detection unit, 27 CM block and CM group determination unit, 28 CM table, 29 transition point stack table, 30 transition point, 31 silence information, 2 scene change information, 33 transition point, 34 detection CM block 35 detects CM group 36 transition point generation management unit, 37 dummy transition point generation unit, 91 an antenna, 93 a monitor, 100 video and audio recording and reproducing apparatus

Claims (8)

Recording means for recording video and audio data;
A transition point detecting means for detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected by the transition point detecting means CM section determining means for determining whether or not the interval from the transition point is a commercial message section;
A video / audio recording / reproducing apparatus comprising: a reproduction unit that reproduces the video / audio data recorded in the recording unit without reproducing the commercial message interval based on the determination information related to the commercial message interval from the CM interval determination unit Because
When the playback unit starts playback of the video / audio data recorded in the recording unit from an arbitrary position, the time length from the playback start position to the playback end position is the maximum of the CM pattern lengths. The video / audio recording / reproducing apparatus is characterized in that the section from the reproduction start position to the reproduction end position is not reproduced when the two combinations and the CM end time length are smaller. Recording means for recording video and audio data;
A transition point detecting means for detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected by the transition point detecting means CM section determining means for determining whether or not the interval from the transition point is a commercial message section;
A video / audio recording / reproducing apparatus comprising: a reproduction unit that reproduces the video / audio data recorded in the recording unit without reproducing the commercial message interval based on the determination information related to the commercial message interval from the CM interval determination unit Because
When the playback means is playing back an arbitrary position of the video / audio data recorded in the recording means, the playback position is newly determined by the CM section determination means to be within a commercial message section In the video / audio recording / reproducing apparatus, the reproduction is interrupted at the first transition point from the reproduction position, and the reproduction is resumed from the section determined not to be the commercial message section by the CM section judging means. Recording means for recording video and audio data;
A transition point detecting means for detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected by the transition point detecting means CM section determining means for determining whether or not the interval from the transition point is a commercial message section;
A video / audio recording / reproducing apparatus comprising: a reproduction unit that reproduces the video / audio data recorded in the recording unit without reproducing the commercial message interval based on the determination information related to the commercial message interval from the CM interval determination unit Because
At the position where the elapsed time from the latest transition point detected by the transition point detection means is larger than the CM end time length and does not match any combination of the CM pattern length and the CM end time length. A pseudo transition point setting means for setting a transition point;
When the reproduction unit starts reproduction from an arbitrary position of the video / audio data recorded in the recording unit, the CM section determination unit determines the interval between the latest transition point and the pseudo transition point. Whether or not the message is a commercial message section, and the reproducing means records the commercial message section in the recording means without reproducing the commercial message section based on the determination information related to the commercial message section from the CM section judging means. A video / audio recording / reproducing apparatus, wherein the recorded video / audio data is reproduced. 4. The video / audio recording / reproducing apparatus according to claim 3, wherein the pseudo transition point has an identifier for distinguishing from the transition point detected by the transition point detecting means. A recording step for recording video and audio data;
A transition point detecting step of detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected in the transition point detection step; A CM section determination step for determining whether or not the interval from the transition point is a commercial message section;
And a playback step of playing back the video / audio data recorded in the recording step without playing back the commercial message section based on the determination result relating to the commercial message section in the CM section determination step. And
When the reproduction step starts reproduction from an arbitrary position of the video / audio data recorded in the recording step, the time length from the reproduction start position to the reproduction end position is the CM pattern length. A video / audio recording / reproducing method characterized by not reproducing a section from the reproduction start position to the reproduction end position when the maximum two combinations and the CM end time length are smaller than the sum. A recording step for recording video and audio data;
A transition point detecting step of detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected in the transition point detection step; A CM section determination step for determining whether or not the interval from the transition point is a commercial message section;
And a playback step of playing back the video / audio data recorded in the recording step without playing back the commercial message section based on the determination result relating to the commercial message section in the CM section determination step. And
When the playback step is playing back an arbitrary position of the video / audio data recorded in the recording step, the playback position is newly determined to be within the commercial message section in the CM section determination step The video / audio recording / reproducing method is characterized in that the reproduction is interrupted at the first transition point from the reproduction position, and the reproduction is resumed from the section determined not to be the commercial message section in the CM section determination step. A recording step for recording video and audio data;
A transition point detecting step of detecting a predetermined transition point of the video and audio data;
Based on the CM pattern length set in advance as the commercial message pattern and the CM end time length set as the length that the commercial message pattern is not likely to continue, the transition point detected in the transition point detection step; A CM section determination step for determining whether or not the interval from the transition point is a commercial message section;
And a playback step of playing back the video / audio data recorded in the recording step without playing back the commercial message section based on the determination result relating to the commercial message section in the CM section determination step. And
A pseudo transition point is set at a position where the elapsed time from the latest transition point detected in the transition point detection step is larger than the maximum value of the set values and does not match any combination of the set values. A transition point generation step;
In the case where the reproduction step starts reproduction from an arbitrary position of the video / audio data recorded in the recording step, an interval between the latest transition point and the pseudo transition point is determined in the CM section determination step. Whether or not is a commercial message section, and the playback step includes the step of recording without reproducing the commercial message section based on the determination result related to the commercial message section determined in the CM section determination step. A video / audio recording / reproducing method comprising: reproducing the video / audio data recorded in step (1). 8. The video / audio recording / reproducing method according to claim 7 , wherein the pseudo transition point has an identifier for distinguishing from the transition point detected in the transition point detection step.

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