JP2011044931A - Editing apparatus, control method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an editing apparatus which can perform re-multiplexing processing in one portion even if an Audio code to be re-multiplexed in at least one of a head portion and an end portion of video data multiplexing Video codes and Audio codes is present in a center portion to perform cut editing on a GOP unit basis. <P>SOLUTION: If an Audio code to be re-multiplexed in at least one of a head portion and an end portion of video data multiplexing Video codes and Audio codes is present in a center portion to perform cut editing on a GOP unit basis, an editing apparatus (100) according to the present embodiment inserts a silent Audio code into the one portion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an editing apparatus, a control method, and a program for cut-editing a code of MPEG (Moving Picture Expert Group) standard.

  Cut editing of a TS (Transport Stream) code includes cut editing performed in GOP (Group Of Picture) units (see FIG. 8A) and cut editing performed in frame units (see FIG. 8B).

  Cut editing in GOP units is performed by inserting a DIT (Discontinue Information Table) at the cut point to separate TS code (processing to separate TS code into Audio code and Video code) or re-multiplexing (Audio code) And TS code editing without re-multiplexing the video code). Cut editing in GOP units has the advantage that it can be realized with a simple configuration because the original code is reused in GOP units of the Video code. However, there is a demerit that cannot be cut in the middle of GOP.

  For frame-by-frame cut editing, the TS code is separated into a Video code and an Audio code, and the Video code is recompressed at the beginning and end of each video scene (the center portion other than the beginning and end portions is re-compressed). Do not compress). The video code and the audio code are re-multiplexed. The frame-based cut editing has an advantage that it can be cut even in the middle of a GOP because it is separated into a Video code and an Audio code, and re-multiplexing is performed after editing the video code in units of frames. However, since the original code needs to be remultiplexed, there is a demerit that makes the configuration complicated. Further, when there is a missing part in the original code, it is necessary to correct (supplement) the code of the missing part in order to perform the remultiplexing process. In addition, when a code that is not supported in the remultiplexing process exists in the original code, the unsupported code is deleted.

  In addition, there is also a cut editing in which a GOP unit cut edit is combined with a frame unit cut edit. In this cut editing, the GOP unit cut editing is performed on the central portion excluding the head portion and the tail portion of the video scene. For this reason, the central part can reuse the original code. In addition, since the recompressed parts at the head part and the tail part each take about 1 second each, even if there is a missing part in the original code at the head part and the tail part, the code of the missing part There is no need to correct (supplement). In addition, even if a code that is not supported by the re-multiplexing process exists in the original code and the unsupported code is deleted, there is no need to cause a big trouble during code reproduction. In addition, since the central part that performs GOP unit cut editing reuses the original code, it is possible to avoid deleting codes that are not supported by remultiplexing processing, such as frame unit cut editing. Can do.

  However, the Video code and the Audio code included in the GOP unit cut editing range do not have the same playback time. For this reason, the central part where the audio code to be re-multiplexed is re-multiplexed in at least one of the head part and the tail part of the video data in which the video code and the audio code are multiplexed, and the GOP unit cut editing is performed. Is present, there is a problem that the re-multiplexing process cannot be performed in one part.

  For this reason, the central part where the audio code to be re-multiplexed is re-multiplexed in at least one of the head part and the tail part of the video data in which the video code and the audio code are multiplexed, and the GOP unit cut editing is performed. Even if it exists, it is considered necessary to develop a technique capable of performing the remultiplexing process in one part.

  As a technical document filed prior to the present invention, there is a document that discloses a technique for dividing and editing MPEG-2 transport stream data (see, for example, Patent Document 1).

  In Patent Document 1, when an audio signal corresponding to the stream data ahead from the divided editing position is present in the rear stream data across the divided editing position, the audio signal is included in the front stream data, In addition, TS packet data in which the video signal between the audio signals is rewritten to dummy data from the division editing position is added. In addition, editing is performed to rewrite the TS packet data of the audio signal to dummy data to the stream data behind the divided editing position. As a result, the above-mentioned Patent Document 1 can remove audio data that may cause an abnormal sound or a silent state that gives the user an uncomfortable feeling when decoding and reproducing the two streams generated after the division. This makes it possible to realize comfortable viewing of AV information.

JP 2005-117556 A

  However, the above-mentioned Patent Document 1 aims to eliminate the occurrence of abnormal noise in an audio signal when a video signal is cut and edited in GOP units. For this reason, when the invention of Patent Document 1 described above is applied to cut editing in which frame-unit cut editing and GOP-unit cut editing are combined, dummy data is inserted between the frame-unit editing portion and the GOP-unit editing portion. As a result, the user feels uncomfortable.

  The present invention has been made in view of the above circumstances, and is a re-multiplexing target for re-multiplexing at least one of a head portion and a tail portion of video data in which a video code and an audio code are multiplexed. An object of the present invention is to provide an editing apparatus, a control method, and a program capable of performing re-multiplexing processing in one part even when an Audio code exists in a central part where cut editing is performed in GOP units.

  In order to achieve this object, the present invention has the following features.

<Editing device>
The editing apparatus according to the present invention is
A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part Because
Insertion means for inserting a silent audio code into the one part when an audio code to be remultiplexed in the central part is re-multiplexed in at least one part of the head part and the tail part. It is characterized by having.

<Control method>
The control method according to the present invention includes:
A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part A control method performed in
An insertion step of inserting a silent audio code into the one part when an audio code to be remultiplexed exists in the central part to be remultiplexed in at least one part of the head part and the tail part; It is characterized by having.

<Program>
The program according to the present invention is:
A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part A program to be executed,
An insertion process for inserting a silent audio code into the one part when an audio code to be remultiplexed exists in the central part to be remultiplexed in at least one of the head part and the tail part; The computer is executed.

  According to the present invention, an audio code to be remultiplexed at least one of a head portion and a tail portion of video data in which a video code and an audio code are multiplexed is cut-edited in GOP units. Even if it exists in the central part to be performed, the re-multiplexing process can be performed in one part.

1 is a diagram illustrating a configuration example of an editing apparatus 100 according to the present embodiment. 6 is a diagram showing an example of processing operation of the editing apparatus 100. FIG. FIG. 11 is a diagram showing an example of the internal configuration of a head part editing unit 1013 and a tail part editing unit 1015. FIG. 11 is a diagram showing an example of processing operation performed by a head part editing unit 1013 and a tail part editing unit 1015. It is a figure for demonstrating the processing operation example shown in FIG. It is a figure which shows the process operation example of 2nd Embodiment. It is a figure for demonstrating the processing operation example shown in FIG. It is a figure for demonstrating the cut edit (a) performed per GOP, and the cut edit (b) performed per frame.

<Outline of Editing Device 100 of the Present Embodiment>
First, an overview of the editing apparatus 100 of the present embodiment will be described with reference to FIG.

  The editing apparatus 100 according to the present embodiment includes a head part editing unit 1013, a center part editing unit 1014, and a tail part editing unit 1015, and is video data in which a video code and an audio code are multiplexed. The video code and audio code are separated from the beginning and end of the video and edited in units of frames of the video code, and then re-multiplexed to perform frame-by-frame cut editing, and the beginning and end are removed. For the central part, cut editing in GOP units for reusing video data in GOP (Group of Pictures) units of Video code is performed.

  The editing apparatus 100 according to the present embodiment has a GOP unit of an audio code to be remultiplexed that is remultiplexed in at least one of a head portion and a tail portion of video data in which a video code and an audio code are multiplexed. If it exists in the central part where cut editing is performed, a silent audio code is inserted into one of the parts.

  As a result, the editing apparatus 100 according to the present embodiment allows the Audio code to be remultiplexed in GOP units to be remultiplexed in at least one of the head part and the tail part in which the Video code and the Audio code are multiplexed. Even if it exists in the central part where cut editing is performed, the re-multiplexing process can be performed in at least one part by using a silent Audio code inserted in at least one part. Hereinafter, the editing apparatus 100 of the present embodiment will be described in detail with reference to the accompanying drawings.

<Configuration Example of Editing Device 100 of the Present Embodiment>
First, a configuration example of the editing apparatus 100 according to the present embodiment will be described with reference to FIG.

  The editing apparatus 100 according to the present embodiment includes a control unit 101 and a storage unit 102.

  The storage unit 102 is a part that stores various types of information. The storage unit 102 stores an MPEG2 encrypted file 1021. The MPEG2 encrypted file 1021 is a file storing TS codes obtained by encrypting MPEG2 standard codes.

  The control unit 101 is a part that controls the entire editing apparatus 100. The control unit 101 according to the present embodiment includes a descrambling unit 1011, a DIT (Discontinue Information Table) insertion unit 1012, a head part editing unit 1013, a center part editing unit 1014, a tail part editing unit 1015, and a re-encryption. Part 1016.

  The descrambling unit 1011 decrypts the TS code stored in the MPEG2 encrypted file 1021.

  The DIT insertion unit 1012 inserts a DIT (Discontinue Information Table) at the cut point of the TS code (first position of the head part of each video scene) for cut editing.

  The beginning part editing unit 1013 edits the beginning part of the video scene. The head part editing unit 1013 performs cut editing in frame units on the head part of the video scene.

  The central part editing unit 1014 edits the central part of the video scene. The central part editing unit 1014 performs cut editing in GOP units for the central part of the video scene.

  The tail part editing unit 1015 edits the tail part of the video scene. The tail part editing unit 1015 performs cut editing in frame units on the tail part of the video scene.

  The re-encryption unit 1016 encrypts the TS code subjected to the cut editing.

<Processing of editing apparatus 100>
Next, the processing operation of the editing apparatus 100 of this embodiment will be described with reference to FIG.

  The descrambling unit 1011 reads the TS code from the MPEG2 encrypted file 1021, and decrypts the TS code (step S1). Since the descrambling of the TS code is a known method, the specific processing is omitted.

  The DIT insertion unit 1012 inserts the DIT at the cut point of the TS code (first position of the head portion of the video scene) where cut editing is performed (step S2). Since the insertion of DIT is a known method, the specific processing is omitted.

  The head part editing unit 1013 performs cut editing in frame units on the head part of the video scene, and recompresses and remultiplexes the TS code of the head part (step S3). The beginning part editing unit 1013 separates the TS code at the beginning part into a Video code and an Audio code, and recompresses the Video code. Then, the recompressed Video code and Audio code are remultiplexed.

  The central part editing unit 1014 performs cut editing in GOP units for the central part of the video scene (step S4). The central part editing unit 1014 extracts the TS code of the central part and reuses the TS code as it is. The central part editing unit 1014 can rewrite the time stamp of the TS code or rewrite the GOP header.

  The tail part editing unit 1015 performs cut editing in units of frames on the tail part of the video scene, and recompresses and remultiplexes the TS code in the tail part (step S5). The tail part editing unit 1015 separates the TS code at the tail part into a Video code and an Audio code, and recompresses the Video code. Then, the recompressed Video code and Audio code are remultiplexed.

  The re-encryption unit 1016 performs re-encryption processing on the TS code subjected to cut editing, and stores the re-encrypted TS code in the MPEG2 encrypted file 1021 (step S6). Since encryption of the TS code is a known method, a specific process is omitted.

  The editing apparatus 100 according to the present embodiment combines frame-based cut editing with GOP-based cut editing, and applies video code and audio code to the beginning and end of video data in which video code and audio code are multiplexed. The video code GOP (Group of Pictures) is applied to the central part excluding the head part and the tail part. It is decided to perform GOP unit cut editing that reuses video data in units. For this reason, the central part can reuse the original code, and can reduce the range of remultiplexing.

  However, the Video code and the Audio code included in the GOP unit cut editing range do not have the same playback time. For this reason, the central part where the audio code to be re-multiplexed is re-multiplexed in at least one of the head part and the tail part of the video data in which the video code and the audio code are multiplexed, and the GOP unit cut editing is performed. Is present, there is a problem that the re-multiplexing process cannot be performed in one part.

  For this reason, in the present embodiment, the audio code to be remultiplexed at least one of the head portion and the tail portion of the video data in which the video code and the audio code are multiplexed is cut in GOP units. When it exists in the central part where editing is performed, it was decided to insert a silent audio code into one of the parts.

  As a result, the editing apparatus 100 according to the present embodiment allows the audio code to be remultiplexed to be remultiplexed at least one of the head part and the tail part of the video data in which the video code and the audio code are multiplexed. Even when it exists in the central part where cut editing is performed in units of GOP, it is possible to perform the remultiplexing process in at least one part by using the silent Audio code inserted in at least one part. The specific method will be described below.

<Configuration example of first part editing unit 1013 and last part editing unit 1015>
First, configuration examples of the first partial editing unit 1013 and the final partial editing unit 1015 will be described. Since the head part editing unit 1013 and the tail part editing unit 1015 have the same configuration, the head part editing unit 1013 will be described with reference to FIG.

  The first partial editing unit 1013 includes an audio code search unit 10, a silent audio code insertion unit 11, an audio code extraction unit 12, a video code search unit 13, a video code extraction unit 14, and a video code recompression unit 15. And a remultiplexing unit 16.

  The audio code search unit 10 searches for an audio code included in the TS code.

  The silent audio code insertion unit 11 inserts a silent audio code into the audio code that is remultiplexed by the remultiplexing unit 16.

  The Audio code extracting unit 12 extracts the Audio code included in the TS code.

  The video code search unit 13 searches for a video code included in the TS code.

  The video code extraction unit 14 extracts the video code included in the TS code.

  The video code recompressing unit 15 recompresses the video code extracted by the video code extracting unit 14.

  The remultiplexing unit 16 remultiplexes the Audio code and the Video code.

<Example of processing operation of first partial editing unit 1013 and last partial editing unit 1014>
Next, processing operation examples of the head part editing unit 1013 and the tail part editing unit 1014 will be described. Since the processing operations of the head part editing unit 1013 and the tail part editing unit 1014 are similar, the processing operation of the head part editing unit 1013 will be described.

  The audio code search unit 10 searches for an audio code included in the TS code and notifies the search result to the silent audio code insertion unit 11 and the audio code extraction unit 12 (step S10).

  Based on the search result received from the audio code search unit 10, the silence audio code insertion unit 11 is connected to the central part where the remultiplexed audio code to be remultiplexed by the remultiplex unit 16 performs cut editing in GOP units. If present, a silent Audio code is inserted into the Audio code to be remultiplexed by the remultiplexing unit 16 (step S11).

  The audio code extraction unit 12 extracts the audio code included in the TS code based on the search result received from the audio code search unit 10, and passes the extracted audio code to the remultiplexing unit 16 (step S12).

  The video code search unit 13 searches for a video code included in the TS code, and notifies the video code extraction unit 14 of the search result (step S13).

  The video code extraction unit 14 extracts the video code included in the TS code based on the search result received from the video code search unit 13 (step S14).

  The video code recompressing unit 15 recompresses the video code extracted by the video code extracting unit 14, and passes the recompressed video code to the remultiplexing unit 16 (step S15).

  The re-multiplexing unit 16 includes an audio code passed from the audio code sampling unit 12, or an audio code in which a silent audio code is inserted into the audio code passed from the audio code sampling unit 12, and a video code recompressing unit The video code passed from 15 is remultiplexed (step S16).

  The head partial editing unit 1013 of the present embodiment includes a silent audio code insertion unit 11, and a central part in which the audio code to be remultiplexed by the remultiplexing unit 16 performs cut editing in GOP units. In the case where it exists in the part, a silent Audio code is inserted into the Audio code that is re-multiplexed by the re-multiplexing unit 16. Thus, the remultiplexing unit 16 uses the silent audio code inserted by the silent audio code insertion unit 11 even when the audio code to be remultiplexed exists in the central portion where cut editing is performed in GOP units. A re-multiplexing process can be performed.

  In the above processing, the processing operation in the head partial editing unit 1013 has been described. However, the same processing as described above is performed for the tail portion editing unit 1014.

<Silent Audio Code Insertion Unit 11>
Next, a specific processing operation of the silent audio code insertion unit 11 will be described with reference to FIGS. 4 and 5.

  The silent audio code insertion unit 11 searches for the time stamp of the audio code close to the time stamp of the first (first) video code at the head of the scene, and acquires the file position of the audio code (step A1).

  For example, since the time stamp of the first (first) Video code at the beginning of the scene shown in FIG. 5 is 0.256 (s), when searching for a time stamp of an Audio code close to 0.256 (s), 0.264 (s ) And the file position of the audio code of 0.264 (s) is acquired. The time shown in FIG. 5 indicates seconds (s), and each packet indicates a minimum coding unit.

  The silent audio code insertion unit 11 determines whether or not the file position of the audio code acquired in step A1 is within the cut editing range (center part) in GOP units (step A2).

  If the audio code file position acquired at step A1 is within the GOP unit cut edit range (center part) (step A2 / Yes), the silent audio code insertion unit 11 starts the first part of the scene (the first one). The time stamp (AT1) of the audio code close to the file position of the video code is acquired (step A3).

  Since the file position of the 0.264 (s) Audio code shown in FIG. 5 is within the cut editing range (center part) in GOP units, the Audio position close to the file position of the first (first) Video code at the beginning of the scene The code time stamp (AT1) is acquired. Since the audio code time stamp (AT1) close to the file position of the first (first) Video code at the beginning of the scene shown in FIG. 5 is 0.072 (s), 0.072 is acquired as AT1.

  Next, the silent audio code insertion unit 11 acquires the time stamp (AT2) of the audio code close to the time stamp of the first (first) video code at the head of the scene (step A4).

  Since the time stamp (AT2) of the Audio code close to the time stamp (0.256) of the first (first) Video code at the beginning of the scene shown in FIG. 5 is 0.264 (s), 0.264 is acquired as AT2.

  The silent audio code insertion unit 11 calculates the number of AUs (Access Units) from the difference between AT1 and AT2 (step A5).

  Since AT1 = 0.072 and AT2 = 0.264, the AU number corresponds to the range of 0.072 to 0.264. In the case of FIG. 5, the number of AUs is nine.

  Next, the silent audio code insertion unit 11 passes the silent audio code corresponding to the number of AUs calculated in step A5 to the remultiplexing unit 16 (step A6).

  In FIG. 5, since the number of AUs is nine, nine silent Audio codes are passed to the remultiplexing unit 16. For this reason, the silent audio code insertion unit 11 inserts nine silent audio codes into the audio code at the head of the scene.

  As a result, the playback time of the video code at the head of the scene and the audio code can be made substantially the same. As a result, the remultiplexing unit 16 recognizes the code at the head of the scene (Video) even when the audio code to be remultiplexed by the remultiplexing unit 16 exists in the central part where cut editing is performed in GOP units. Code, Audio code) can be remultiplexed. In addition, the audio code of the time stamp indicating the time before the time stamp of the video code at the head of the scene can be changed to a silent audio code. In FIG. 5, audio codes from 0.072 to 0.243 indicating the time before the time stamp (0.256) of the video code at the head of the scene can be changed to silent audio codes.

  The silent audio code insertion unit 11 inserts a silent audio code if the file position of the audio code acquired in step A1 does not exist within the GOP unit cut editing range (center portion) (step A2 / No). The audio code extracting unit 12 extracts the first audio code from the first part of the scene to the last audio code of the first part of the scene, and passes the extracted audio code to the remultiplexing unit 16 (step A7). Referring to FIG. 5 as an example, since the first audio code at the beginning of the scene corresponds to 0.072 and the last audio code at the beginning of the scene corresponds to 0.243, the audio codes from 0.072 to 0.243 are extracted, The extracted audio code is passed to the remultiplexing unit 16. Thus, the remultiplexing unit 12 uses the code (Video code, video code,...) Of the scene head portion based on the Audio code passed from the Audio code sampling unit 12 and the Video code passed from the Video code recompression unit 15. (Audio code) is remultiplexed.

<Operation / Effect of Editing Device 100 of this Embodiment>
As described above, the editing apparatus 100 according to the present embodiment is configured such that the audio code to be remultiplexed at the head portion of the video data in which the video code and the audio code are multiplexed is the center in which the GOP unit cut editing is performed. If it exists in the part, a silent Audio code is inserted in the head part. As a result, even when the audio code to be re-multiplexed is re-multiplexed at the beginning of the video data in which the video code and the audio code are multiplexed, even if the audio code to be re-multiplexed exists in the center portion where cut editing is performed in GOP units, It is possible to perform the remultiplexing process using the code.

  Note that the editing apparatus 100 according to the present embodiment performs the processing of the head partial editing unit 1013 described above similarly in the tail partial editing 1015. For this reason, the editing apparatus 100 according to the present embodiment is configured so that the audio code to be remultiplexed at the end portion of the video data in which the video code and the audio code are multiplexed is the central portion where the GOP unit cut editing is performed. In this case, a silent audio code is inserted at the end. As a result, even when the audio code to be re-multiplexed at the end of the video data multiplexed with the video code and the audio code is present in the center portion where the GOP unit cut editing is performed, the silent audio It is possible to perform the remultiplexing process using the code.

(Second Embodiment)
Next, a second embodiment will be described.

  In the first embodiment, the time stamp of the first (first) video code at the beginning of the scene is used to determine whether or not to insert a silent audio code.

  In the second embodiment, a video code for determining whether or not to insert a silent audio code is designated, and whether or not a silent audio code is inserted using the time stamp of the designated predetermined video code. It is characterized by determining.

  As a result, a video code for determining whether or not to insert a silent audio code is arbitrarily designated, and the same processing as that of the first embodiment is performed using a time stamp of the designated predetermined video code. Is possible. Hereinafter, the second embodiment will be described in detail with reference to FIGS. 6 and 7. In the following processing operation, a case will be described in which the fourth video code is designated as the video code for determining whether or not to insert a silent audio code.

  The silent audio code insertion unit 11 searches for the time stamp of the audio code close to the time stamp of the predetermined (fourth) video code at the head of the scene, and acquires the file position of the audio code (step B1).

  For example, since the time stamp of the predetermined (fourth) Video code at the beginning of the scene shown in FIG. 7 is 0.256 (s), when searching for the Audio code time stamp close to 0.256 (s), 0.264 (s) is obtained. s) corresponds, and the file position of the audio code of 0.264 (s) is acquired.

  The silent audio code insertion unit 11 determines whether or not the file position of the audio code acquired in step B1 is within the cut editing range (center portion) in GOP units (step B2).

  If the audio code file position acquired at step B1 is within the GOP unit cut edit range (center part) (step B2 / Yes), the silent audio code insertion unit 11 starts the first part of the scene (first) The time stamp (AT1) of the audio code close to the file position of the video code is acquired (step B3).

  Since the file position of the 0.264 (s) Audio code shown in FIG. 7 is within the cut editing range (center part) in GOP units, the Audio position close to the file position of the first (first) Video code at the beginning of the scene The code time stamp (AT1) is acquired. Since the audio code time stamp (AT1) close to the file position of the first (first) Video code at the beginning of the scene shown in FIG. 7 is 0.072 (s), 0.072 is acquired as AT1.

  Next, the silent audio code insertion unit 11 acquires the time stamp (AT2) of the audio code close to the time stamp of the predetermined (fourth) video code at the head of the scene (step B4).

  Since the time stamp (AT2) of the Audio code close to the time stamp (0.256) of the predetermined (fourth) Video code at the head of the scene shown in FIG. 7 is 0.264 (s), 0.264 is acquired as AT2.

  The silent audio code insertion unit 11 calculates the number of AUs (Access Units) from the difference between AT1 and AT2 (step B5).

  Since AT1 = 0.072 and AT2 = 0.264, the AU number corresponds to the range of 0.072 to 0.264. In the case of FIG. 7, the number of AUs is nine.

  Next, the silent audio code insertion unit 11 determines whether there is an audio code that can be used in the remultiplexing process within the range from AT1 to AT2 (step B6).

  The silent audio code insertion unit 11 subtracts the AU number of the available Audio code from the AU number calculated in Step B5 when there is an Audio code that can be used in the remultiplexing process (Step B6 / Yes). The silent audio code corresponding to the number of AUs is passed to the remultiplexing unit 16 (step B8).

  In the case of FIG. 7, the Audio code in the range of 0.158 to 0.243 is included in the time stamp (0.167 to 0.423) of the Video code included in the head portion of the scene. For this reason, an audio code in the range of 0.158 to 0.243 corresponds to an audio code that can be used in the remultiplexing process, and it is determined that there is an available audio code (step B6 / Yes). In this case, the silent audio code insertion unit 11 generates silent audio corresponding to the number of AUs (4) obtained by subtracting the number of AUs of available audio codes (5) from the number of AUs calculated in step B5 (9). The code is passed to the remultiplexing unit 16. As a result, the silent audio code insertion unit 11 inserts the four silent audio codes into the audio code at the head of the scene, and uses the audio codes that can be used in the remultiplexing process as they are in the remultiplexing process. Become.

  As a result, the audio code that can be used in the remultiplexing process can be remultiplexed using the original audio code without using a silent audio code.

  In addition, when there is no usable audio code (step B6 / No), the silent audio code insertion unit 11 performs the silent audio code corresponding to the number of AUs calculated in step B5 as in the first embodiment. Is passed to the remultiplexing unit 16 (step B7). As a result, even if the audio code to be re-multiplexed by the re-multiplexing unit 16 exists in the central part where cut editing is performed in GOP units, the code (Video code, Audio code) at the beginning of the scene is re- Multiplexing processing can be performed.

  If the audio code file position acquired in step B1 does not exist within the cut edit range (center portion) in GOP units (step B2 / No), the silent audio code insertion unit 11 is the same as in the first embodiment. Similarly, without inserting a silent audio code, the audio code extraction unit 12 extracts an audio code from the first (first) audio code at the beginning of the scene to the last audio code at the beginning of the scene, and extracts the extracted audio code. The audio code is transferred to the remultiplexing unit 16 (step B9). Referring to FIG. 7 as an example, the first (first) Audio code at the beginning of the scene corresponds to 0.072, and the last Audio code at the beginning of the scene corresponds to 0.243. The code is extracted, and the extracted Audio code is passed to the remultiplexing unit 16. Thus, the remultiplexing unit 12 uses the code (Video code, video code,...) Of the scene head portion based on the Audio code passed from the Audio code sampling unit 12 and the Video code passed from the Video code recompression unit 15. (Audio code) is remultiplexed.

<Operation / Effect of Editing Device 100 of this Embodiment>
As described above, the editing apparatus 100 according to the present embodiment designates a video code for determining whether or not to insert a silent audio code, and uses the time stamp of the designated predetermined video code to generate a silent audio code. It is determined whether or not a code is inserted. As a result, a video code for determining whether or not to insert a silent audio code is arbitrarily designated, and the same processing as that of the first embodiment is performed using a time stamp of the designated predetermined video code. Can do.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

  For example, the control operation in each device configuring the editing device 100 in the present embodiment described above can be executed using hardware, software, or a composite configuration of both.

  In the case of executing processing using software, it is possible to install and execute a program in which a processing sequence is recorded in a memory in a computer incorporated in dedicated hardware. Alternatively, the program can be installed and executed on a general-purpose computer capable of executing various processes.

  For example, the program can be recorded in advance on a hard disk or ROM (Read Only Memory) as a recording medium. Alternatively, the program can be stored (recorded) temporarily or permanently in a removable recording medium. Such a removable recording medium can be provided as so-called package software. Examples of the removable recording medium include a floppy (registered trademark) disk, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disk, a DVD (Digital Versatile Disc), a magnetic disk, and a semiconductor memory.

  The program is installed on the computer from the removable recording medium as described above. In addition, it is wirelessly transferred from the download site to the computer. In addition, it is transferred to a computer via a network by wire.

  In addition, the editing apparatus 100 according to the present embodiment is not only executed in time series according to the processing operation described in the above embodiment, but also the processing capability of the apparatus that executes the process, or in parallel as necessary. It can also be constructed to run individually.

  The present invention is applicable to a technique for editing an MPEG standard code.

DESCRIPTION OF SYMBOLS 100 Editing apparatus 101 Control part 1011 Decryption part 1012 DIT insertion part 1013 Leading part editing part 1014 Center part editing part 1015 End part editing part 1016 Re-encryption part 102 Storage part 1021 MPEG encryption file 10 Audio code search part 11 Silence Audio Code Insertion Unit 12 Audio Code Extraction Unit 13 Video Code Search Unit 14 Video Code Extraction Unit 15 Video Code Recompression Unit 16 Remultiplexing Unit

Claims (8)

A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part Because
Insertion means for inserting a silent audio code into the one part when an audio code to be remultiplexed in the central part is re-multiplexed in at least one part of the head part and the tail part. An editing apparatus comprising: The insertion means includes
When the time stamp of the Audio code close to the time stamp of the Video code existing in the one part is specified and the file position of the specified Audio code exists in the central part, the Audio code to be remultiplexed is The editing apparatus according to claim 1, wherein the editing apparatus determines that the central part exists. The insertion means includes
When it is determined that the audio code to be remultiplexed exists in the central portion, the time stamp of the Audio code close to the file position of the Vidio code existing at the beginning of the one portion is close to the time stamp of the Video code 3. The editing apparatus according to claim 2, wherein a number of silent audio codes corresponding to the number of audio codes existing before the time stamp of the audio code are inserted. Having designation means for designating a Video code existing in the one part;
The insertion means includes
An audio code time stamp that is close to the video code time stamp specified by the specifying means is specified, and it is determined whether or not the file position of the specified audio code exists in the central portion. Item 2. The editing device according to item 2 or 3. The insertion means includes
When it is determined that the file position of the specified audio code exists in the central portion, the video specified by the specifying means from the time stamp of the audio code close to the file position of the Vidio code present at the beginning of the one portion. 5. The editing apparatus according to claim 4, wherein a number of silent audio codes corresponding to the number of audio codes existing before the time stamp of the audio code close to the time stamp of the code is inserted. The insertion means includes
When there is a reusable audio code among the number of audio codes, the number of silent audio codes corresponding to the number of codes obtained by subtracting the reusable audio code number from the audio code number is inserted. The editing apparatus according to claim 3 or 5, characterized in that: A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part A control method performed in
An insertion step of inserting a silent audio code into the one part when an audio code to be remultiplexed exists in the central part to be remultiplexed in at least one part of the head part and the tail part; A control method comprising: A frame that is remultiplexed after the video code and the audio code are separated and edited for each frame of the video code with respect to the head part and the tail part of the video data in which the video code and the audio code are multiplexed. An editing device that performs cut editing in units and performs cut editing in GOP units for reusing the video data in GOP (Group of Pictures) units of the Video code with respect to the central part excluding the head part and the end part A program to be executed,
An insertion process for inserting a silent audio code into the one part when an audio code to be remultiplexed exists in the central part to be remultiplexed in at least one of the head part and the tail part; A program characterized by being executed by a computer.

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