WO2004008756A1 - デジタルコンテンツ分割装置、デジタルコンテンツ再生装置、デジタルコンテンツ分割方法、プログラム、及び記録媒体 - Google Patents
デジタルコンテンツ分割装置、デジタルコンテンツ再生装置、デジタルコンテンツ分割方法、プログラム、及び記録媒体 Download PDFInfo
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- WO2004008756A1 WO2004008756A1 PCT/JP2003/008933 JP0308933W WO2004008756A1 WO 2004008756 A1 WO2004008756 A1 WO 2004008756A1 JP 0308933 W JP0308933 W JP 0308933W WO 2004008756 A1 WO2004008756 A1 WO 2004008756A1
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- frame
- program
- digital content
- dividing
- vobu
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/216—Rewritable discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- G11B2220/2575—DVD-RAMs
Definitions
- Digital content dividing device Digital content reproducing device, digital content dividing method, program, and recording medium
- the present invention relates to a digital content division device, a digital content reproduction device, a digital content division method, a program, and a recording medium for dividing digital content when editing digital content including video data and audio data. is there. Background art
- PGC ProgRamChain
- PGs PierRam: program
- a program usually constitutes one scene, and is composed of a set of C el 1 (cells).
- Cel 1 is the minimum access unit in data reproduction, and includes the addresses of a plurality of VOBUs (VideOOBJectUnits) to be reproduced.
- V ⁇ BU corresponds to an integral multiple of the GOP (GroOfPictures) of the MPEG, and is the video data in the range of 0.4 to 1.0 seconds. However, the boundaries of GOP and VOBU usually do not coincide.
- a VOBU is formed from the MOP stream GOP, a plurality of VOBUs are collected to form a cell which is a minimum access unit during reproduction, and a plurality of cells is collected to form a program which is one scene. Then, a program chain is composed of multiple programs. In producing and editing digital contents having such a configuration, processing such as cutting out an arbitrary cell from a program, which is one scene, or dividing a program, is frequently performed.
- FIG. 12 is a flowchart showing the flow of a conventional division process
- FIGS. 13 (a) and 13 (b) are schematic diagrams for explaining program division. In FIGS.
- stream data is divided along the boundary of the smallest unit (VOBU) when dividing the stream data, and the cells that specify the playback start frame and the playback end frame are also bounded by the VOB.U boundary. Therefore, there is a problem that the divided content starts from a position different from the position specified by the user.
- VOBU smallest unit
- the frame specified by the user is specified in the cell as the playback start frame after division, if the frame specified by the user is a frame that cannot be played without referring to the previous frame, such as the B frame of MPEG, If there is no reference frame in the stream after division, there is a problem that it is difficult to start reproduction from a frame designated by the user.
- the frame specified by the user is a frame that cannot be played back without referring to a subsequent frame such as an MPEG B frame. If the reference stream does not exist in the stream after the segmentation, it is difficult to play back to the frame specified by the user and finish the playback.
- the digital content to be divided includes audio data
- the audio data corresponding to the specified frame is not DISCLOSURE OF THE INVENTION DISCLOSURE OF THE INVENTION DISCLOSURE OF INVENTION
- the invention had a problem that it was difficult to reproduce the corresponding sound from the frame specified by the user if it did not exist in the stream
- the present invention has been made in consideration of the above problems, and has been made in consideration of the above problems, and when a content is divided, a digital content dividing device, a digital content reproducing device, a digital content dividing method, a program, and a recording that can be faithfully reproduced from a position designated by a user. It is intended to provide a medium. Further, in consideration of the above problems, the present invention provides a digital content dividing device, a digital content reproducing device, and a digital content dividing method capable of faithfully reproducing up to a position designated by a user when the content is divided. , Programs, and recording media.
- a first aspect of the present invention includes a plurality of programs each including a plurality of CELLs each including a plurality of VOBUs each having a video frame that is an I frame or a P frame and / or a B frame.
- the closest I-frame before the specified playback start video frame is And a dividing unit that divides the program by dividing at the front side of the VOBU.
- the second present invention provides a program comprising a plurality of CELLs having an I frame or a P frame and a video frame which is a B frame or a plurality of VOB U including audio packs.
- a digital content dividing apparatus comprising: a dividing unit that divides the program by dividing the program at the front of a V ⁇ BU including the audio pack closest to the designated reproduction start video frame. Further, in the third aspect of the present invention, the dividing means may be configured such that, when dividing the program, when dividing the CE LL, the reproduction start video is set as a reproduction start time of the CE LL at the end of the division.
- a digital content dividing device according to the first or second aspect of the present invention for setting a time corresponding to a frame.
- the dividing unit may be configured such that, when dividing the program, when dividing the CELL, the reproduction start video frame is a head of the VOBU including the reproduction start video frame. From the beginning of the VOBU that includes the playback start video frame after the predetermined number of frames from the beginning of the VOBU including the playback start video frame.
- a digital content dividing device according to the first or second aspect of the present invention, wherein a first VOBU of the CELL at the end of the division is determined based on whether there is any.
- a fifth invention is a CE LL having a plurality of VOBUs having an I frame, or a P frame and a video frame which is a Z or B frame.
- a playback end video frame is designated for digital content recorded by a video recording standard having a plurality of programs composed of a plurality of programs, the program is divided at the boundary of the VOBU.
- a content dividing device When a playback end video frame is designated for digital content recorded by a video recording standard having a plurality of programs composed of a plurality of programs, the program is divided at the boundary of the VOBU.
- a digital content dividing apparatus comprising: a dividing unit that divides the program by dividing the program behind a VOBU including an I frame closest to the designated reproduction end video frame.
- the dividing means includes: when dividing the program, when dividing the CELL, as a reproduction end time of the former CELL, A fifth embodiment of the digital content dividing apparatus of the present invention for setting a corresponding time.
- the reproduction end video frame is arranged after the VOBU including the reproduction end video frame.
- the force at or after the predetermined number of frames (1), (2) or the playback end video frame is before the predetermined number of frames after the VOBU including the playback end video frame.
- an eighth invention is a digital content reproducing apparatus for reproducing a program divided by the digital content dividing apparatus according to the third invention
- a digital content reproducing apparatus that reproduces the video program specified by the reproduction start time of the CELL at the time of reproducing the program at the rear of the divided cell when the CELL is divided; It is.
- a ninth aspect of the present invention is a digital content reproducing apparatus for reproducing a program divided by the digital content dividing apparatus of the sixth aspect
- a tenth aspect of the present invention is a video recording standard having a plurality of CELLs each having a plurality of VOBUs each having a video frame that is an I frame or a P frame and / or a B frame.
- the eleventh present invention provides a program comprising a plurality of CELLs having an I frame or a p frame and a video frame which is a Z or B frame and having a plurality of VOBUs including audio packs.
- a dividing step of dividing the program by dividing the program at the front side of a V ⁇ BU including a video pack (also referred to as an I-frame or a P-frame).
- a thirteenth aspect of the present invention provides a digital content dividing device according to the first aspect of the present invention
- a fifteenth aspect of the present invention provides a digital content dividing device according to the second aspect of the present invention.
- a fifteenth aspect of the present invention provides a digital content dividing device according to the fifth aspect of the present invention, wherein:
- a sixteenth aspect of the present invention is a recording medium that carries any one of the thirteenth to fifteenth programs, and is a recording medium that can be processed by a computer.
- a first step of designating a playback start frame after division and a first frame of unit data including the playback start frame are searched, and a video object including the first frame is searched for a first frame after division.
- the leading object of the unit video data is included in the leading object after division, and in the third step, a playback start frame is set. Starts playback from the specified frame.
- the second step may include the step of dividing the first object based on whether the reproduction start frame is before or after a predetermined frame from the beginning of the video object.
- FIG. 1 is a block diagram showing a configuration of a recording and reproducing apparatus according to the first and second embodiments of the present invention.
- FIG. 2 is a schematic diagram (a) showing a state before division of digital content according to the first and second embodiments of the present invention.
- FIG. 2 is a schematic diagram showing (b) a state after division of digital content in the first and second embodiments of the present invention.
- FIG. 2 is a schematic diagram (c) showing a state after division of digital content according to the first and second embodiments of the present invention.
- FIG. 3 is a flowchart illustrating an operation of dividing digital content according to the first embodiment of the present invention.
- FIG. 4 is an explanatory diagram of frame reference in the MPEG standard.
- FIG. 5 is a diagram showing management information before dividing digital content in the first and second embodiments of the present invention.
- FIG. 6 is a diagram showing management information after division of digital content according to the first and second embodiments of the present invention.
- FIG. 7 is a diagram showing management information after division of digital content according to the first and second embodiments of the present invention.
- FIG. 8 is a schematic diagram illustrating division of digital content according to the second embodiment of the present invention.
- FIG. 9 is a schematic diagram illustrating division of digital content according to the second embodiment of the present invention.
- FIG. 10 is a flowchart illustrating division of digital content according to the second embodiment of the present invention.
- FIG. 11 is a schematic diagram of the data structure of DVD.
- FIG. 12 is a flowchart illustrating the conventional operation of dividing digital content.
- FIG. 13 is a schematic diagram showing (a) a state before division of a conventional digital content.
- FIG. 13 is a schematic diagram showing a state after the division of (b) the conventional digital content division.
- FIG. 1 shows the configuration of the recording / reproducing device 51 according to the first embodiment.
- the recording / reproducing device 51 transmits an MPEG stream to a DVD-RAM recording medium. It is a device that can record and reproduce.
- the recording / reproducing device 51 includes a signal input unit 52, an encoder 53, a control unit 54, an input unit 55, a disk control unit 56, a decoder 57, and a signal output unit 58.
- the signal input section 52 is a means for inputting a video / audio signal.
- the encoder 53 is means for generating an MPEG stream by encoding the video / audio signal input to the signal input section 52.
- MPEG is, for example, an MPEG2 transport stream
- MPEG is an abbreviation of MOVINGPicTUR eExP er tsGROUP.
- the control unit 54 is means for controlling the encoder 53, the decoder 57, the disk control unit 56, and the input unit 55.
- the input unit 55 is a means for inputting a recording instruction by the user.
- the disc control unit 56 receives the MPEG stream generated by the encoder 53 via the control unit 54, and has a management data structure based on the DVD video recording standard for the received MPEG transport stream. Is a means for recording on a DVD-: AM recording medium. That is, the disk control unit 56 records the MPEG stream on the DVD-RAM recording medium, generates data having a management data structure based on the DVD video recording standard, and also uses this data as the DVD-RAM recording medium. Means to record.
- the disk control unit 56 uses the data of the management data structure based on the DVD video recording standard, which is recorded on the DVD-RAM recording medium, to record the data on the DVD-RAM recording medium. It is also a means of playing and restoring an existing MPEG stream.
- the decoder 57 reproduces and restores the MPE played back by the disc controller 56. This is a means for receiving the G stream from the control unit 54 and decompressing the received MPEG stream.
- the signal output section 58 is means for outputting the signal expanded and decompressed by the decoder 57 to an external device such as a display as an analog video / audio signal.
- the input unit 55 inputs a recording instruction given by the user, and notifies the control unit 54 that the recording instruction has been given.
- control unit 54 When notified that the recording instruction has been issued from the input unit 55, the control unit 54 instructs the encoder 53 to encode the video / audio signal input from the signal input unit 52.
- the signal input section 52 receives a video / audio signal, and outputs the input video / audio signal to the encoder 53.
- the encoder 53 When the encoder 53 is instructed to encode the video / audio signal input from the control unit 54, the encoder 53 encodes the video / audio signal input to the signal input unit 52 to generate an MPEG stream. Then, the generated MPEG stream is output to the control unit 54.
- the disk control unit 56 receives the MPEG stream output to the control unit 54 from the control unit 54, records the MPEG transport stream on a DVD-RAM recording medium, and uses the DVD video recording standard. Generates the data of the management data structure based on the DVD-RAM and records it on the recording medium of the RAM.
- the DVD-RAM recording medium contains an MPEG stream as part of the management data structure based on the DVD video recording standard. It is recorded together with the data of the management data structure.
- a management data structure based on the DVD video recording standard is simply referred to as a management data structure.
- the MPEG stream is recorded on the DVD-RAM recording medium so as to have a management data structure. It should be noted that such digital contents, that is, the MPEG stream recorded on the DVD-RAM recording medium and the data of the management data structure correspond to FIG.
- FIGS. 2 (a) to 2 (c) are explanatory diagrams of content division, and are diagrams schematically showing the MPEG stream when the horizontal axis is time. It is assumed that the time increases from left to right as viewed in the paper in FIGS. 2 (a) to 2 (c).
- FIG. 5 is a diagram showing a detailed configuration of the management information before division, and corresponds to the explanatory diagram of FIG. 2 (a).
- FIG. 6 is a diagram showing a detailed configuration of management information after division, and corresponds to the explanatory diagram of FIG. 2 (b).
- FIG. 7 is a diagram showing a detailed configuration of management information after division, and corresponds to the explanatory diagram of FIG. 2 (c).
- FIG. 3 is a flowchart for explaining the dividing operation of the present invention. The operation of the digital content division method according to the present embodiment will be described with reference to FIGS. 2 (a) to 2 (c) and FIG.
- management information which is data of a management data structure storing digital content time information and the like, is stored on a disk, ie, a DVD-RAM recording medium.
- Step S201 that is, the control unit 54 instructs the disk control unit 56 to read the management information from the disk.
- the data of the management data structure stored in the disk, that is, the management information is read and output to the control unit 54.
- FIG. 5 shows the management information of stream 1 (100) shown in FIG. 2 (a). That is, the disk control unit 56 reads the management information shown in FIG. 5 from the disk.
- VOB Video Object
- V ⁇ B1 which is V ⁇ B
- V ⁇ BU2 V ⁇ BU3
- VOB 2 is a VOB is assumed to be composed of a VOBU VOBU4, VOBU 5, VOBU 6 s and VOBU 7.
- a VOB VOB.3 is V_ ⁇ VOBU 8
- VOBU 9 s VOBU 1 0 is a BU, and assumed to be composed of VOBU 1 1.
- the management information of each VOB includes information on the start time and end time.
- the start time and end time of VOB 1 are shown as V 1 -S and V 2 -E.
- the start time and end time of VOB 2 are shown as V 2 -S and V 2 -E.
- the start time and end time of VOB 3 are shown as V 3 -S and V 3 -E.
- VI-S and V2-E correspond to Start PTM and End PTM of VOB in the video recording standard. The same applies to V2-S, V2-E, V3-S, and V3E.
- CELL indicates the data playback unit.
- the playback range of the VOB is set by the start time (time code) and end time (time code) included in the management information of the CLL, and the time map included in each VOB is set. It provides access to the desired stream data by converting the time code information into address information on the disk using a table.
- the start time and end time are shown in FIG. 5 as C1-S and C1-E, respectively.
- the start time and end time of CELL 2 are shown as C2-S and C2-E.
- the start time and end time of CELL 3 are shown as C3-S and C3-E.
- CI-S and C2-E correspond to the Start PTM and End PTM of CELL in the video recording standard. The same applies to C2-S, C2-E, C3-S, and C3-E.
- the start time and end time of CELL coincide with the start time and end time of VOB. That is, the values of V 1 -S and V 1 -E are stored in C 1 -S and C 1 -E, respectively.
- the values of V 2 -S and V 2 -E are stored in C 2 -S and C 2 -E, respectively, and the values of V 3 -S and V 3 -E are stored in C 3 -S and C 3 -E, respectively.
- the value of E is stored.
- CE LL1, CELL 2, and CE LL3 specified by PG 9 are played in this order. That is, when the reproduction of PG 9 starts, the VOBs specified by CE LL 1, CE LL 2, and CELL 3 are reproduced in the order from left to right on the page.
- CI-S and C1-E indicate V1-S and V1-E, respectively, so that VOBU1, VBUBU2, and VOBU3 are all reproduced in this order.
- CE By LL2 and CELL3, all of VOBU4 to VOBUl1 will be reproduced.
- the disk control unit 56 reads out and restores all the MPEG streams of VOBUl to VOBU11 based on the management information of FIG. Then, the decoder 57 receives the MPEG stream reproduced and restored by the disk control unit 56 from the control unit 54, decompresses the received MPEG stream, and outputs a signal as a video / audio signal. Output to part 58.
- the signal output unit 58 outputs a video / audio signal to an external device such as a display.
- the management information shown in FIG. 5 and the description related to the management information have been described above. .
- the control unit 54 After the control unit 54 reads the management information from the disk to enable the operation such as the reproduction of the program, the control unit 54 then displays the stream as shown in FIG. 2A displayed on the screen.
- the user designates a frame to be divided while viewing the playback image of 1 (100) (S202). That is, a reproduced video of stream 1 (100) as shown in FIG. 2A is displayed on a display or the like connected to the signal output unit 58. Then, the user designates a frame to be divided using the input means 55 while watching the reproduced image of the stream ⁇ (100).
- the frame for which division is specified is a frame in the middle of VOBU 6 as indicated by the specified frame in FIG.
- FIG. 2 (a) when a divided frame is designated at VOBU 6 as indicated by a designated point 99, the boundary between VOBU 5 and VOBU 6 is a candidate for division.
- Figure 4 shows the boundary between VOBU5 and VOBU6.
- 300 indicates VOBU5
- 310 indicates VOBU6.
- the symbols I, P, and B in the figure indicate the I, P, and B frames of the MPEG, respectively.
- the beginning of VOBU 6 is an MPEG B frame.
- the control unit 54 sets the boundary between VOBU5 and VOBU6. To divide content. This is because the VOBU 6 includes the I frame and the P frame, so that the B frame of the specified reproduction start frame can be reproduced. Therefore, in this case, as shown in FIG. 2 (b), the stream is divided into stream 4 (103) and stream 5 (104) at the boundary between VOBU5 and VOBU6 (S20). 6).
- Figure 2 (c) shows the result of splitting the stream between VO BU 4 and V1 BU 5 into stream 2 (101) and stream 3 (102).
- playback can be performed from the playback start frame specified by the specified point 99.
- the control unit 54 sets the designated reproduction start frame. It is determined whether or not the frame can be reproduced using only the data of the VOBU including the frame. If the frame can be reproduced, the frame is divided at the front boundary of the VOBU (S206). Performs the division (S205) using the front side of the immediately preceding VOBU as a boundary (S205).
- control unit 54 also divides the cell according to the divided stream (
- the reproduction start time corresponding to the specified reproduction start frame is set as the reproduction start time in the divided cell (S208).
- the digital content is divided into the first half stream and cell, and the second half stream and cell (S209).
- FIG. 2 (b) cell 2-1 is divided into stream 4 (103) so that cell 2-2 corresponds to stream 5
- FIG. 2 (c) Cell 2-1 is divided so that stream 2 (1 0 1) corresponds to cell 2-1, and stream 3 (1 0 2) corresponds to cell 2-2.
- the start time referenced by cell 2-2 is not the start time of VOB U 6, but the time pointed by the designated point 99, and the range referenced by cell 2-2 is VOBU
- the specified point of 6 is from the time of 9 to the end time of VOBU 7.
- the start time referenced by cell 2-2 is not the start time of VOBU 5, but the time pointed by the designated point 99, and the range referenced by cell 2-2 is the VOBU 6 The time from the designated point 9 to the end time of VOBU7.
- control unit 54 splits VOBU 5 and VO BU 6 as described in Fig. 2 (b). I do. Also, from the beginning of VOBU 6 to the designated point If no I frame is included, the control unit 54 performs division between VOBU4 and VOBU5 as described with reference to FIG. 2 (c). That is, the control unit 54 divides the PG 9 which is a program by dividing the PG 9 at the front boundary of the VOBU including the I frame closest to the designated frame before the designated frame.
- FIG. 6 which is the management information after division, when an I frame is included from the beginning of VOBU 6 to the designated point, the control unit 54 sets VOBU 5 and VOBU 5 as described above.
- VOB 2 before division is divided into V ⁇ B 2-1 and VOBU2-2
- CELL 2 before division is correspondingly CE LL 2-1 and CE LL 2 — Divided into two.
- PG 9 is divided into PG 9-1 and PG 9-2.
- V ⁇ B 2 before division is divided into VOB 2-1 and VOB 2-2 as shown in FIG. 6, the control unit 54 determines how many frames from the beginning of VOBU 6 the specified frame is. Is counted, and the number of frames is converted to time. If the start time of a newly created VOB 2-2 is defined as V2-1-S, this is converted to V2-2-S above. The time T of the specified frame is calculated by adding the time.
- control unit 54 sets a start time C2-2-2-S of CELL2-12, which is the later CELL of the divided, to time T. Further, the control unit 54 sets the start time and end time of each CELL other than C2-2-S equal to the start time and end time of each corresponding VOB. That is, unlike the conventional technology, the start time of the rearmost CELL is set to T instead of V2-2-S, which is the start time of VOB2-2.
- the control unit 54 transmits the management information after the division created in this manner to the device.
- the disk control unit 56 outputs the management information shown in FIG. 6 from the program chain PGC to the entire VOBU hierarchical structure on the disk.
- the input unit 55 notifies the control unit 54 that PG 9-2 has been selected and selected.
- the control unit 54 controls the disk control unit 56 to read PG 9-2 and controls the decoder 57 to decode the MPEG stream read.
- the disc control unit 56 and the decoder 57 determine that the start time C 2-2-S of the first CE LL 2-2 of the PG 9-2 is T, so that the frame at the time T Start playback.
- the display connected to the signal output unit 58 in this way starts displaying at the time T frame.
- control unit 54 counts how many frames from the top of VOBU 6 the specified frame is The number of frames is converted to time, and the start time of the newly created VOB 2-2 divided by t is calculated as V 2-1_S Then, the time T of the designated frame is calculated by adding the time converted above to this V2-2-S.
- control unit 54 sets the start time C2-2-2-S of CELL2_2_2, which is the rearmost CELL of the division, to time T. Further, the control unit 54 sets the start time and end time of each CELL other than C2-2-S equal to the start time and end time of each corresponding VOB. That is, unlike the conventional technology, the start time of the rearmost CELL is set to T instead of V2-2-S, which is the start time of VOB2-2.
- the control unit 54 outputs the divided management information created in this way to the disk control unit 56, and the disk control unit 56 transmits the management information shown in FIG. 7 from the program chain PGC to the VOBUBU. Record all of the hierarchical structure on disk.
- control unit 54 controls the disk control unit 56 to read PG 9-2 and controls the decoder 57 to decode the MPEG stream read.
- the disk control unit 56 and the decoder 57 determine that the start time C 2-2 -S of the first CE LL 2-2 of the PG 9-2 is T. Start playback.
- the display connected to the signal output unit 58 in this manner starts displaying from the frame at time T.
- a function of confirming the divided content with a preview is provided (S2010). In this way, it is possible to confirm how the divided content is reproduced and then finally write the content to a recording medium.
- management information that is, data of the management data structure is written (S201), and if there is a defect (S201), management before division Reload the information and execute the division again.
- step (S204) of determining whether or not the designated playback start frame can be played back whether the designated playback start frame can be played back using only ⁇ data including the frame is determined.
- the first two frames of the VOBU refer to the frame of the previous VOBU, so the specified playback start frame starts from the first VOBU.
- the boundary of the division may be determined depending on whether it is before or after the third frame.
- the stream is divided in the VOB U including the specified position as shown in Fig. 2 (b). If the position specified by the user is before the third frame from the beginning of the VOBU, the stream is divided at the VOBU immediately before the VOBU including the specified position as shown in Fig. 2 (c).
- step (S202) of designating the playback start frame the user designates the frame while looking at the display screen. However, the user may directly input the frame number from the beginning of the stream, or Enter directly You may.
- MPEG has been described as an example of a compression method in the present embodiment, any other compression method may be used as long as it has a configuration in which an image is generated by referring to data before and after. .
- the input unit 55 has been described as inputting a recording instruction made by the user and notifying the control unit 54 that the recording instruction has been made. Not exclusively.
- the input unit 55 may input a recording instruction from a timer based on the scheduled recording, and notify the control unit 54 that the recording instruction has been issued.
- the MPEG stream generated by the encoder 53 is output to the control unit 54 and input from the control unit 54 to the disk control unit 56. Not limited to The MPEG stream generated by the encoder 53 may be directly transferred to the disk controller 56.
- control unit 54 of the present embodiment is an example of the dividing unit of the present invention
- input unit 55 of the present embodiment is an example of the specifying unit of the present invention.
- FIG. 1 shows the configuration of a recording / reproducing device 51 according to the second embodiment.
- the recording / reproducing device 51 according to the second embodiment is the same as that of the first embodiment.
- the operation when the recording / reproducing apparatus 51 of the present embodiment records a video / audio signal on a DVD-RAM recording medium is the same as that of the first embodiment. You.
- FIG. 10 shows a flowchart for explaining the dividing operation of the present embodiment.
- the operation of S300 is different from that of the first embodiment.
- the operations from S201 to S203 are the same as in the first embodiment.
- the operations from S2006 to S2012 are the same as those in the first embodiment.
- FIG. 5 is a diagram showing a detailed configuration of management information before division
- FIG. 8 is a detailed configuration of VOBU4, VOBU5, and VOBU6 constituting VOB 2 corresponding to CE LL2 before division.
- FIG. 5 is a diagram showing a detailed configuration of management information before division
- FIG. 8 is a detailed configuration of VOBU4, VOBU5, and VOBU6 constituting VOB 2 corresponding to CE LL2 before division.
- management information which is data having a management data structure in which time information of digital content is stored, is read from a disk, ie, a DVD-RAM recording medium, and operations such as program reproduction can be performed. (S201).
- control unit 54 instructs the disk control unit 56 to read the management information from the disk.
- the disk control unit 56 reads the data of the management data structure stored on the disk, that is, the management information, and outputs it to the control unit 54.
- Fig. 5 shows the management information of stream 1 (100) shown in Fig. 2 (a). That is, the disk control unit 56 reads the management information shown in FIG. 5 from the disk.
- the control unit 54 displays the screen as shown in FIG. 2 (a) displayed on the screen.
- stream 1 (1 00) Do not look at the playback video of La user to specify the frame you want to split (S 20 2). That is, The reproduced video as shown in FIG. 2 (a) is displayed on a display or the like connected to the signal output unit 58. Then, the user specifies a frame to be divided using the input means 55 while watching the reproduced video of the stream 1 (100).
- the frame for which division is specified is a frame in the middle of VOBU 6 as indicated by the specified frame in FIGS.
- VOBU data is composed of a video pack (V) and an audio pack (A).
- One video pack (V) or one audio pack (A) is usually about 2 Kbytes in size, and one video image is composed of many video packs (A). That is, the I, P, and B frames included in the VOBU are each composed of a plurality of video packs and audio packs.
- the audio pack is composed of a stream inserted between video packs. Since the amount of audio data is smaller than the amount of video data, each frame does not always include audio data. Assume that the frame numbers are assigned as shown in FIG. 8, and for example, audio data corresponding to frames 10 to 16 is included in the audio pack 201.
- audio data corresponding to frames 17 to 21 is included in audio pack 202.
- the designated frame is frame 16 and VO BU 5 and VOBU 6 If the audio data is divided by, the audio data corresponding to the frame 16 is included in the audio pack 201 included in the V OBU 5, so that the audio corresponding to the frame 16 cannot be reproduced.
- the audio data corresponding to the specified frame is included from the beginning of the VOBU to the specified frame. This judgment is This can be done by referring to the time stamp included in the audio pack header. If audio data corresponding to the specified frame is included between the beginning of the VOBU and the specified frame, the audio data is divided at the front boundary of the VOBU including the specified frame, and the audio data is divided between the beginning of the VOBU and the specified frame. If the audio data corresponding to the specified frame is not included, the data is divided at the front boundary of the VOBU containing the audio pack containing the audio data corresponding to the specified frame.
- the audio data corresponding to the designated frame 16 is included in the audio pack 201.
- the audio pack 201 is included in VOBU5. Therefore, it is divided at the boundary between VOBU5 and VOBU4.
- Fig. 9 shows another example.
- the designated frame is frame, 16.
- the audio pack 203 included in the VOBU 4 includes audio data corresponding to the frames 14 to 16.
- the audio pack 204 includes audio data corresponding to frames 17 to 21.
- the audio pack 204 is included in VOBU6.
- the audio data corresponding to the designated frame 16 is included in the audio pack 203, and the audio pack 203 is included in the VOBU4. Divide by boundaries.
- control unit 54 divides the program by dividing at the front boundary of the VOBU including the closest audio pack before the designated frame. Note that the method of dividing the VOB, CE LL, and the program, and the method of setting the start time and end time of the VOB and CE LL are described in the first embodiment. Therefore, detailed description is omitted.
- the audio data corresponding to the specified frame is included in the program after the division, it is possible to faithfully reproduce the audio from the specified frame.
- control unit 54 faithfully reproduces the program after the division from the designated frame has been described.
- control unit 54 specifies the program before the division. It is also possible to faithfully reproduce up to the frame and finish the reproduction.
- control unit 54 faithfully reproduces up to the designated frame of the former divided program and ends the reproduction will be described with reference to FIG.
- the specified frame to end the reproduction is a frame in the middle of the VOBU 6 from the beginning.
- the frame is divided at the boundary between VOBU 6 and VOBU 7. If the I frame is not included between the designated frame and the last frame of VOB U 6, the program up to VOBU 7 is included in the former program, and VOBU 8 and later are added after the divided program. Divide the program so that it is included in the other program.
- control means 54 may divide the program by dividing the VOBU after the VOBU including the closest I frame after the designated frame to end the reproduction.
- the designated frame of the present embodiment is an example of the reproduction end video frame of the present invention.
- the frame according to the present embodiment is an example of the video frame according to the present invention.
- the program after the divided one is faithfully reproduced from the specified frame will be described.
- the case has been described where the sound of the divided program at the rear is faithfully reproduced from the specified frame.
- the present invention is not limited to this.
- the front boundary of the VOBU before the specified frame and closest to the specified frame and the front boundary of the VOBU containing the audio pack before the specified frame and closest to the specified frame It may be divided at the boundary of. In this way, the latter program can be faithfully reproduced from the specified frame, and audio can be faithfully reproduced from the specified frame.
- the program of the present invention is a program for causing a computer to execute the functions of all or a part of the above-described digital content dividing apparatus of the present invention (or an apparatus, an element, or the like) using a computer. It is a program that works in cooperation with.
- the recording medium of the present invention carries a program for causing a computer to execute all or a part of the functions of all or a part of the above-described digital content dividing apparatus of the present invention (or an apparatus, an element, etc.).
- the “function of the means (or device, element, etc.)” of the present invention means all or a part of the function of the means.
- one use form of the program of the present invention may be a form in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.
- One use form of the program of the present invention may be a form in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer.
- the data structure of the present invention includes a database, a data format, a data table, a data list, a data type, and the like.
- the recording medium includes ROM and the like
- the transmission medium includes transmission media such as the Internet, light, radio waves and sound waves.
- the computer of the present invention described above is not limited to pure hardware such as CPU, but may include firmware, OS, and peripheral devices.
- the configuration of the present invention may be realized by software or hardware.
- the present embodiment by adjusting the division position of the stream data constituting the program of the digital content and the reproduction start position of the divided cell, the deviation from the point designated by the user is achieved. This has the effect that the program can be divided without any trouble, and the program can be reliably reproduced from the point specified by the user.
- the present invention provides a digital content division device, a digital content reproduction device, a digital content division method, a program, and a recording medium that can faithfully reproduce up to a position designated by a user when the content is divided. You can do it.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004521207A JP4425134B2 (ja) | 2002-07-17 | 2003-07-14 | デジタルコンテンツ分割装置、デジタルコンテンツ再生装置、及びデジタルコンテンツ分割方法 |
EP03764196A EP1523183A4 (en) | 2002-07-17 | 2003-07-14 | DEVICE FOR DISTRIBUTION OF DIGITAL CONTENT, DEVICE FOR PLAYING DIGITAL CONTENT, METHOD FOR DISTRIBUTING DIGITAL CONTENT, PROGRAM AND RECORDING MEDIUM |
US10/495,794 US20050031310A1 (en) | 2002-07-17 | 2003-07-14 | Digital content division device, digital content reproduction device, digital content division method, program, and recording medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002208384 | 2002-07-17 | ||
JP2002-208384 | 2002-07-17 |
Publications (1)
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WO2004008756A1 true WO2004008756A1 (ja) | 2004-01-22 |
Family
ID=30112844
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PCT/JP2003/008933 WO2004008756A1 (ja) | 2002-07-17 | 2003-07-14 | デジタルコンテンツ分割装置、デジタルコンテンツ再生装置、デジタルコンテンツ分割方法、プログラム、及び記録媒体 |
Country Status (7)
Country | Link |
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US (1) | US20050031310A1 (ja) |
EP (1) | EP1523183A4 (ja) |
JP (1) | JP4425134B2 (ja) |
KR (1) | KR20050026913A (ja) |
CN (1) | CN100438604C (ja) |
TW (1) | TWI270056B (ja) |
WO (1) | WO2004008756A1 (ja) |
Families Citing this family (2)
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WO2005117432A1 (ja) * | 2004-05-25 | 2005-12-08 | Matsushita Electric Industrial Co., Ltd. | 番組録画装置および番組録画方法 |
US20070097205A1 (en) * | 2005-10-31 | 2007-05-03 | Intel Corporation | Video transmission over wireless networks |
Citations (4)
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JPH11273314A (ja) * | 1998-03-20 | 1999-10-08 | Pioneer Electron Corp | デジタルデータ記録再生装置 |
JP2002157820A (ja) * | 2000-11-21 | 2002-05-31 | Pioneer Electronic Corp | 記録媒体再生装置、および情報記録媒体 |
JP2002367344A (ja) * | 2002-03-26 | 2002-12-20 | Toshiba Corp | 情報再生方法と情報再生装置及び情報記録媒体 |
JP2003045161A (ja) * | 2001-08-01 | 2003-02-14 | Plannet Associate Co Ltd | デジタル音声映像情報の編集方法 |
Family Cites Families (9)
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US5532833A (en) * | 1992-10-13 | 1996-07-02 | International Business Machines Corporation | Method and system for displaying selected portions of a motion video image |
KR100214605B1 (ko) * | 1996-06-21 | 1999-08-02 | 구자홍 | 디브이디 재생기의 복수 영상각 영상 재생 장치 및 방법 |
US6546189B1 (en) * | 1996-11-15 | 2003-04-08 | Hitachi, Ltd. | Method and apparatus for editing compressed moving pictures and storage medium |
JP3791114B2 (ja) * | 1997-04-30 | 2006-06-28 | ソニー株式会社 | 信号再生装置及び方法 |
US20030113096A1 (en) * | 1997-07-07 | 2003-06-19 | Kabushiki Kaisha Toshiba | Multi-screen display system for automatically changing a plurality of simultaneously displayed images |
US6449310B1 (en) * | 1997-11-21 | 2002-09-10 | Matsushita Electric Industrial Co., Ltd. | Video signal coding apparatus |
EP1065665A4 (en) * | 1998-02-23 | 2004-10-06 | Toshiba Kk | INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING / PLAYBACK METHOD |
TW498305B (en) * | 1999-03-10 | 2002-08-11 | Matsushita Electric Ind Co Ltd | Optical disc, optical disc recording and reproducing apparatus, and optical disc recording and reproducing method |
US6707778B1 (en) * | 1999-11-10 | 2004-03-16 | Thomson Licensing S.A. | Edit to picture without decoding and re-encoding of MPEG bit stream for recordable DVD |
-
2003
- 2003-07-14 KR KR1020047007264A patent/KR20050026913A/ko not_active Application Discontinuation
- 2003-07-14 WO PCT/JP2003/008933 patent/WO2004008756A1/ja active Application Filing
- 2003-07-14 CN CNB038015978A patent/CN100438604C/zh not_active Expired - Fee Related
- 2003-07-14 JP JP2004521207A patent/JP4425134B2/ja not_active Expired - Fee Related
- 2003-07-14 EP EP03764196A patent/EP1523183A4/en not_active Withdrawn
- 2003-07-14 US US10/495,794 patent/US20050031310A1/en not_active Abandoned
- 2003-07-16 TW TW092119427A patent/TWI270056B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11273314A (ja) * | 1998-03-20 | 1999-10-08 | Pioneer Electron Corp | デジタルデータ記録再生装置 |
JP2002157820A (ja) * | 2000-11-21 | 2002-05-31 | Pioneer Electronic Corp | 記録媒体再生装置、および情報記録媒体 |
JP2003045161A (ja) * | 2001-08-01 | 2003-02-14 | Plannet Associate Co Ltd | デジタル音声映像情報の編集方法 |
JP2002367344A (ja) * | 2002-03-26 | 2002-12-20 | Toshiba Corp | 情報再生方法と情報再生装置及び情報記録媒体 |
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Also Published As
Publication number | Publication date |
---|---|
TWI270056B (en) | 2007-01-01 |
CN100438604C (zh) | 2008-11-26 |
US20050031310A1 (en) | 2005-02-10 |
TW200403634A (en) | 2004-03-01 |
EP1523183A1 (en) | 2005-04-13 |
EP1523183A4 (en) | 2007-03-28 |
JPWO2004008756A1 (ja) | 2005-11-17 |
JP4425134B2 (ja) | 2010-03-03 |
KR20050026913A (ko) | 2005-03-16 |
CN1596541A (zh) | 2005-03-16 |
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