WO2005041570A1 - ファイル記録装置、ファイル再生装置、ファイル編集装置、ファイル記録方法、ファイル再生方法、ファイル編集方法、ファイル記録方法のプログラム、ファイル再生方法のプログラム、ファイル編集方法のプログラム、ファイル記録方法のプログラムを記録した記録媒体、ファイル再生方法のプログラムを記録した記録媒体、ファイル編集方法のプログラムを記録した記録媒体、記録媒体 - Google Patents
ファイル記録装置、ファイル再生装置、ファイル編集装置、ファイル記録方法、ファイル再生方法、ファイル編集方法、ファイル記録方法のプログラム、ファイル再生方法のプログラム、ファイル編集方法のプログラム、ファイル記録方法のプログラムを記録した記録媒体、ファイル再生方法のプログラムを記録した記録媒体、ファイル編集方法のプログラムを記録した記録媒体、記録媒体 Download PDFInfo
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- WO2005041570A1 WO2005041570A1 PCT/JP2004/015963 JP2004015963W WO2005041570A1 WO 2005041570 A1 WO2005041570 A1 WO 2005041570A1 JP 2004015963 W JP2004015963 W JP 2004015963W WO 2005041570 A1 WO2005041570 A1 WO 2005041570A1
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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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- 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
- 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
-
- 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
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/781—Television signal recording using magnetic recording on disks or drums
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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
- H04N5/84—Television signal recording using optical recording
- H04N5/85—Television signal recording using optical recording on discs or drums
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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
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
- H04N5/9205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal the additional signal being at least another television signal
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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
-
- 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
- G11B2220/2525—Magneto-optical [MO] 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
- G11B2220/2545—CDs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99951—File or database maintenance
- Y10S707/99956—File allocation
Definitions
- File recording device file reproducing device, file editing device, file recording method, file reproducing method, file editing method, file recording method program, file reproducing method program, file editing method program, file recording method program BACKGROUND OF THE INVENTION
- the present invention relates to a file recording device, a file reproducing device, a file editing device, a file recording method, a file reproducing method, a file editing method, a file recording method program, a file reproducing method program, a file editing method program, and a file.
- the present invention relates to a recording medium on which a recording method program is recorded, a recording medium on which a file reproducing method program is recorded, a recording medium on which a file editing method program is recorded, and a recording medium.
- information necessary for reproduction of a multiplexed stream and information necessary for reproduction of a stream constituting the multiplexed stream are set as one of the blocks based on the management information.
- QT file format has been widely known as a file format compatible with multimedia.
- the QT format is a file format born as an extension of the OS (Operating System) for playing moving images without using special hardware.Moving images, audio, still images, characters, It is a time-based multimedia file format that can play back real data in various formats such as MIDI on one time axis. .
- these actual data such as moving images, still images, audio, etc. are grouped into blocks, and separately from the actual data blocks, management information for managing the actual data is grouped into blocks. .
- such a block is called an atom.
- each atom based on the actual data and the management information is further blocked according to a hierarchical structure.
- each actual data is stored as a media data as an individual track, and in the QT file,
- the actual data tracks of moving pictures, sounds, and characters are referred to as video tracks, sound tracks (audio tracks), and text tracks, respectively.
- the track atom based on the management information is formed for each real data in a hierarchical structure corresponding to the track based on each real data.
- a sample description atom (Sample Description Atom) is assigned to the track atom based on the hierarchy management information, and the sample description atom is set so that the type and content of the corresponding real data can be recognized.
- a track based on this management information is created on the premise of a single type of actual data, so that a sample description atom has a single sound and video element. Only information about the mental stream is described.
- this file is excluded from playback targets or played back based on the track ID that is the identifier set for each track. Play the actual data assigned to each track as much as possible.
- the file cannot be viewed at all, or the playback state of the track selected by the track ID is viewed regardless of the content of the file.
- JP-A-2003-1797959 sets a priority order for tracks based on the actual data, and furthermore, according to the priorities, the actual data is reproduced within a reproducible range.
- a playback method has been proposed.
- a file can be appropriately played according to the content of the file even in a device having a limited playback function.
- MPEG-2 Various programs are provided by the Muslim.
- a stream obtained by multiplexing video and sound elementary streams such as a program stream based on the MPEG-2 system, can be recorded in QT format, it is considered to be a convenient IJ. Therefore, it is desirable to record by QT file / record even in the program stream etc.
- the track based on the management information is assumed to be real data of a single type, so that video data and sound data are mixed like a program stream by the MPEG-2 system.
- the MPEG-2 system There was a problem that it was not possible to manage the actual data in the format, and that this type of multiplexed stream could not be recorded in the QT format.
- a stream in which a stream of video data and sound data are multiplexed can be represented by a QT file, and even in a device with limited functions, this multiplexing can be performed according to the contents of the file. It is desired to appropriately reproduce the elementary streams that make up the stream.
- the so-called An open GOP may be applied in addition to a closed GOP (Group Of Pictures).
- the closed GOP is a format in which the reference frame and field of the P picture and B picture are all set in the same GOP
- the open GOP is that the reference frame and the field of the P picture and B picture are immediately before This is the format set in other GOPs.
- the GOP is a processing unit of the encoding process in units of frames. For example, in MPEG, it is set to 15 frames.
- the present invention has been made in view of the above points, and a file recording device, a file reproducing device, and the like capable of recording and further processing a stream in which video data and sound data are multiplexed by a QT file or the like.
- the present invention is applied to a file recording device that records actual data on a recording medium in a file of a predetermined format
- a stream in which a stream of multiplexed sound data and a stream of sound data are multiplexed is assigned to one of the real data to form a block of real data, and a block of management information in the middle layer is formed corresponding to the multiplexed stream.
- the information necessary for the reproduction of the multiplexed stream, the information necessary for the reproduction of the stream by the video data, and the reproduction of the stream by the sound data are stored in the lower layer block of the management information block by the intermediate layer. Set the necessary information and record the multiplexed stream on the recording medium.
- the present invention is applied to a file recording apparatus that records actual data on a recording medium in a file of a predetermined format, and a stream in which a stream of video data and a stream of sound data are multiplexed is converted into a stream of actual data.
- a block of real data is formed by allocating the blocks to one, and a block of management information is formed in the middle layer corresponding to the multiplexed stream. If the information necessary for reproducing the multiplexed stream, the information necessary for reproducing the stream using the video data, and the information necessary for reproducing the stream using the sound data are set and recorded on the recording medium, Tracks based on management information are stored in a file such as a QT format that assumes a single piece of actual data.
- a stream obtained by multiplexing a stream based on audio data and a stream based on sound data can be recorded, and the stream can be set to be identifiable.
- a program stream or the like in a format in which video data and sound data are mixed can be recorded by the QT file.
- the file is applied to a file reproducing apparatus that reproduces and outputs a file recorded on a predetermined recording medium, and the file is composed of a stream obtained by multiplexing a stream of video data and a stream of sound data.
- a block of management information is formed by an intermediate layer corresponding to the multiplexed stream, and a lower layer of the management information block by the intermediate layer.
- the information required to play the multiplexed stream, the information needed to play the stream with video data, and the information needed to play the stream with sound data are set in the block of the file.
- the playback device replays from the recording medium based on the information necessary for playback set in the lower layer block.
- the stream of video data and the stream of sound data are reproduced by processing the data of the generated file.
- the present invention is applied to a file editing device that edits a file in a predetermined format, and a stream in which a stream of video data and a stream of sound data are multiplexed into a file f is converted to real data And a block of real data is formed, and a block of management information by the middle layer is formed corresponding to the multiplexed stream.
- the information required to play the multiplexed stream, the information needed to play the stream with video data, and the information and power needed to play the stream with sound data are set in the hierarchical blocks. Processes the file based on the information required for playback set in the lower-level book.
- a stream in a mixed format of video data and sound data can be recorded as a QT file or the like, and this file can be reproduced and edited.
- a file recording method for recording actual data on a recording medium by using a file of a predetermined format [this application is applied to a file recording method in which a stream based on video data and a stream based on sound data are multiplexed.
- the stream is allocated to one of the real data to form a block of the real data, and a block of the management information is formed by the middle layer corresponding to the multiplexed stream, and the block of the management information is formed by the middle layer.
- the lower layer block information necessary for reproducing the multiplexed stream, information necessary for reproducing the stream using video data, and information necessary for reproducing the stream using sound data are set.
- the multiplexed stream is recorded on a recording medium.
- the file is applied to a file reproducing method of reproducing and outputting a file recorded on a predetermined recording medium, and the file is composed of a stream in which a stream of video data and a stream of sound data are multiplexed. Is assigned to one of the real data to form a block of the real data, and a management of the middle layer is formed in accordance with the multiplexed stream.A block of the green information is formed, and a block of the management information is formed by the middle layer. Necessary for playing multiplexed streams in lower-level blocks.
- the file playback method is based on the playback set in the lower layer block. Based on necessary information, data of a file reproduced from a recording medium is processed to reproduce a stream of video data and a stream of sound data.
- the file is applied to a file editing method for editing a file in a predetermined format
- a file is a stream in which a stream of video data and a stream of sound data are multiplexed.
- a block of management information in the middle layer corresponding to the multiplexed stream, and Information necessary for reproducing the multiplexed stream, information necessary for reproducing the stream using video data, and information required for reproducing the stream using sound data are set in the block.
- Process files based on the information required for playback set in the hierarchy block.
- a stream in which video data and sound data are multiplexed is applied to a file recording method program for recording actual data on a recording medium in a file of a predetermined format. Allocating one of the real data to form a block of real data; forming a block of management information by the middle layer corresponding to the multiplexed stream; Setting, in the hierarchical blocks, information necessary for reproducing a multiplexed stream, information necessary for reproducing a stream using video data, and information necessary for reproducing a stream using sound data.
- the file is applied to a file reproducing method program for reproducing and outputting a file recorded on a predetermined recording medium, and the file is obtained by multiplexing a stream of video data and a stream of sound data.
- the information required to play back the multiplexed stream, the information needed to play back the stream using video data, and the information needed to play back the stream using sound data are set in the block.
- This program processes the data of the file reproduced from the recording medium on the basis of the information necessary for reproduction set in the lower-level blocks, and reproduces a stream of video data and a stream of sound data. Have a step.
- a file is formed by multiplexing a stream of video data and a stream of sound data into a stream of real data.
- a block of real data is formed by being assigned to one, and a block of management information ⁇ is formed by the middle layer corresponding to the multiplexed stream, and a block of a lower layer of the management information block by the middle layer is formed.
- information necessary for playing the multiplexed stream, information necessary for playing the stream using video data, and information necessary for playing the stream using sound data are set.
- the program shall have steps to process the file based on the information required for the lower layer blocks [this playback].
- a program for a file recording method a program for a file reproducing method, and a program for a file editing method capable of recording and processing a program stream or the like in a QT file or the like are provided.
- a stream of video data and a stream of sound data are multiplexed by applying to a recording medium recording a program of a file recording method for recording actual data on a recording medium in a file of a predetermined format.
- a stream is allocated to one of the real data [Steps to form a block of the real data, and a block of management information is formed by the middle layer corresponding to the multiplexed stream, and is managed by the middle layer.
- the method includes a step of setting information necessary for reproducing a multiplexed stream, information necessary for reproducing a stream using video data, and information necessary for reproducing a stream using sound data.
- a file is composed of a stream of video data and a stream of sound data.
- the multiplexed stream is allocated to one of the real data to form a block of the real data, and a block of management information is formed by the middle layer corresponding to the multiplexed stream, and the management by the middle layer is performed.
- the information required to play the multiplexed stream, the information needed to play the stream by video data, and the information needed to play the stream by sound data are set in the block at the lower layer of the information block.
- the program of the file playback method is used for the playback set in the lower-level block. Based on the main information, so as to have a step of reproducing a stream by stream and sound data by the video data by processing the data of a file to be reproduced from the recording medium.
- the file is applied to a recording medium storing a program of a file editing method for editing a file in a predetermined format
- the file is a stream in which a stream of video data and a stream of sound data are multiplexed.
- a block of management information is formed by the middle layer corresponding to the multiplexed stream, and
- the lower layer block is set with the information required to play the multiplexed stream, the information needed to play the stream using video data, and the information needed to play the stream using sound data.
- the method program provides information necessary for playback set in the lower-level block. Have the step of processing the file based on it.
- a recording medium recording a program of a file recording method capable of recording and processing a program stream or the like by a QT file or the like, a recording medium recording a program of a file reproducing method, It is possible to provide a recording medium on which a program of the file editing method is recorded.
- the file is used as a recording medium in which a file in a predetermined format is recorded, and the file is a stream in which a stream of video data and a stream of sound data are multiplexed,
- the blocks are allocated to one to form a block of actual data, and a block of management information is formed in the middle layer corresponding to the multiplexed stream, and the lower layer of the management information block in the middle layer is formed.
- Information necessary for reproducing a multiplexed stream, information necessary for reproducing a stream using video data, and information necessary for reproducing a stream using sound data are set in a hierarchical block. .
- a recording medium on which a file in such a format is recorded.
- a stream in which video data and sound data are multiplexed can be recorded and further processed by a QT file or the like.
- FIG. 1 is a block diagram showing a video disc device according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic diagram for explaining the atoms of the QT file.
- FIG. 3 is a chart for explaining the format of a QT file.
- FIG. 4 is a chart provided for explanation of a sample description atom.
- FIG. 5 is a chart for explaining the sample description entry.
- FIG. 6 is a chart showing a specific example of the sample description entry of FIG.
- FIG. 7 is a chart showing a stream description atom.
- FIG. 8 is a chart showing video stream flags of the stream description atom of FIG.
- FIG. 9 is a chart showing stream information of the stream description atom in FIG.
- FIG. 1 and 0 are charts showing track property atoms.
- FIG. 11 is a chart for explanation of a program stream.
- FIG. 12 is a chart showing a stream control track.
- FIG. 13 is a chart showing sample data of a stream control track.
- FIG. 14 is a chart showing stream control elements according to the sample data of FIG.
- FIG. 15 is a chart showing control commands.
- FIG. 16 is a chart showing control data.
- FIG. 17 is a chart showing a specific example of a stream control track.
- FIG. 18 is a chart showing another specific example of the stream control track.
- FIG. 19 is a flowchart showing a sound track playback processing procedure according to the priority set in the QT file.
- FIG. 20 is a flowchart showing a continuation of FIG.
- FIG. 21 is a flowchart showing a mixing processing procedure according to the priority set in the QT file. .
- FIG. 22 is a flowchart showing a continuation of FIG. 21.
- FIG. 23 is a flowchart showing a ratio setting processing procedure in the processing procedure of FIG.
- FIG. 24 is a chart showing the ratios set by the processing of FIG.
- FIG. 25 is a flowchart showing a processing procedure related to a closed GOP identifier.
- FIG. 26 is a schematic diagram for explaining the editing processing by the edit atom.
- FIG. 27 is a schematic diagram for explaining an editing process according to an example different from that of FIG.
- FIG. 28 is a flowchart showing a QT file reproduction processing procedure by a stream control portal track.
- FIG. 29 is a flowchart showing a continuation of FIG.
- Figure 3,0 is a continuation of Figure 28 for the stream control truck. It is a low chart.
- FIG. 31 is a flowchart showing a continuation of FIG. 30.
- FIG. 1 is a block diagram showing a video disk device according to an embodiment of the present invention.
- a video signal and a sound signal of a subject are obtained by an imaging unit and a sound obtaining unit (not shown), and an imaging result based on the video signal and the sound signal is recorded on the optical disk 2.
- the imaging result recorded on the optical disc 2 is reproduced and output from a display means by a liquid crystal display panel, an audio output means by speed, and to an external device. Further, the imaging result is provided to the user in this way, and the imaging result is edited in response to the operation by the user.
- the video disc device 1 After a video signal and a sound signal based on such an imaging result are multiplexed by a program stream by the MPEG-2 system, the video signal and the sound signal are recorded on the optical disc 2 in a predetermined file format. Applies the QT format to this file format.
- the video encoder 11 generates video data by performing an analog-to-digital conversion process on the video signal DV1 based on the imaging result, and encodes the video data according to the MPEG format. Outputs the elementary stream DV using video data.
- the audio encoder 12 converts the sound signal DA 1 based on the imaging result into analog digital data to generate sound data, encodes the sound data according to the MPEG format, and thereby converts an elementary stream DA of the sound data. Output.
- the file generator 15 synchronizes and multiplexes the elementary streams DA and DV output from the video encoder 11 and the audio encoder 12 at the time of recording, thereby obtaining a program by the MPEG-2 system. Create a stream. Under the control of the system control microcomputer 19, a QT file is created from this program stream. Therefore, the file generator 15 sequentially generates the program stream data by multiplexing the sequentially input elementary streams DA and DV and sequentially setting a sequence header and the like. It also generates and outputs media data atom data, which is the actual data atom in the QT file, from the data of this program stream.
- data necessary for generating a movie atom is additionally recorded and stored in the built-in memory 15A corresponding to the data of the media data atom, and upon completion of recording the media data atom, Generates and outputs a movie atom data string from the data stored in memory 15A.
- the memory controller 18 switches its operation under the control of the system control microcomputer 19, and during recording, sequentially records the data string based on the QT file output from the file generator 15 in the memory 17 and temporarily stores it.
- the stored data is output in accordance with the processing of the error correction code Z decoder 21.
- the output data of the error correction code / decoder 21 is temporarily stored and output to the file decoder 16 and the system control microcomputer 19.
- the error correction code decoder 21 switches its operation under the control of the system control microcomputer 19, and at the time of recording, temporarily records the output data of the memory controller 18 in the memory 20 and adds an error correction code. In addition, by reading out the data held in the memory 20 in a predetermined order and outputting the data, the data is interleaved and output to the data modem 23.
- the error correction code Z decoder 21 temporarily stores data output from the data modulator / demodulator 23 in a predetermined order in the memory 20 and outputs the data to the memory controller 18 in the reverse order of the time of reproduction and recording. Thus, the data output from data modulator / demodulator 23 is subjected to the interleaving process and output. At this time, error correction processing is performed using the error correction code added during recording.
- the data modulator / demodulator 23 switches its operation under the control of the system control microcomputer 19, and converts the output data of the error correction code / demultiplexer 21 into a serial data string during recording, and then performs modulation processing. Output to magnetic field modulation driver 24 or optical pickup 33 The At the time of reproduction, a clock is reproduced from the reproduction signal output from the optical pickup 33, and the reproduction signal is subjected to binary identification and demodulation processing with reference to this clock to correspond to the serial data sequence generated at the time of recording. The reproduced data is obtained, and the reproduced data is output to the error correction code Z decoder 21.
- the magnetic field modulation driver 24 drives the magnetic field head 32 with the output signal of the data modem 23 under the control of the system control microcomputer 19 during recording.
- the magnetic field head 32 is held so as to face the optical pickup 33 with the optical disk 2 interposed therebetween, and the output data of the data modulator / demodulator 23 is located at the laser beam position irradiated by the optical pickup 33. Apply the appropriate modulating magnetic field.
- the imaging result is recorded on the optical disk 2 by a file in the QT format by applying a thermomagnetic recording method.
- the optical disk 2 is a disk-shaped recording medium.
- the optical disk 2 is a rewritable optical disk such as a magneto-optical disk (MO) and a phase-change disk.
- the spindle motor 31 controls the optical disk 2 by controlling the servo circuit 30 so that the linear velocity (CLV: Constant Linear Velocity), the angular velocity (CAV: Constant Angular Velocity), and the zone CLV (ZCLV: Zone) are controlled according to the optical disk 2.
- the optical disk 2 is rotationally driven under conditions such as Constant Linear Velocity.
- the servo circuit 30 controls the operation of the spindle motor 31 based on various signals output from the optical pickup 33, thereby executing a spindle control process.
- the drive control microcomputer 22 controls operations such as seek in these servo circuits 30 in accordance with an instruction from the system control microcomputer 19.
- the optical pickup 3 3 irradiates the optical disk 2 with a laser beam, receives the return light thereof by a predetermined light receiving element, and generates and outputs various control signals by arithmetically processing the received light result. Pit row and mark row formed in 2 And outputs a reproduction signal whose signal level changes in accordance with.
- the optical pickup 33 switches its operation under the control of the system control microcomputer 19, and when the optical disk 2 is a magneto-optical disk, intermittently starts up the amount of laser beam applied to the optical disk 2 during recording. As a result, in the video disk device 1, the imaging result is recorded on the optical disk 2 by a so-called pulse train method.
- the optical pickup 33 changes the light amount of the laser beam applied to the optical disk 2 according to the output data of the data modulator / demodulator 23 from the light amount during reproduction to the light amount during writing. Then, the imaging result is recorded on the optical disk 2 by applying the thermal recording method.
- the video signal and the sound signal based on the imaging result are data-compressed by the video encoder 11 and the audio encoder 12 and converted into an elementary stream, and then the MPEG is generated by the file generator 15.
- the MPEG is generated by the file generator 15.
- Generates a program stream with two systems converts this program stream into a QT format file, and sends it through a memory controller 18, an error correction code decoder 21, and a data modem 23 sequentially. Recording is performed on the optical disk 2 by the pickup 33 or by the optical pickup 33 and the magnetic field head 32.
- the reproduced signal obtained from the optical pickup 33 is processed by the data modulator / demodulator 23 to obtain reproduced data, and the reproduced data is processed by the error correction code / decoder 21 to produce the optical disk.
- the file in the QT format recorded in 2 is reproduced, and the data of the file in the QT format is output from the memory controller 18.
- the file decoder 16 receives the data of the QT file output from the memory controller 18 and decomposes the data into elementary streams of video data, sound data, and sound data, and outputs the data.
- the file decoder 16 acquires and holds the data of the movie atom in advance under the control of seek and the like by the system control microcomputer 19, and based on the management information set in the movie atom, the video data and Outputs an elementary stream of sound data.
- the video decoder 13 converts the elementary stream of this video data into data. It is expanded and output to display means (not shown) to an external device.
- the audio decoder 14 decompresses the elementary stream of the sound data output from the file decoder 16 and outputs the data to audio output means (not shown) and an external device. Then, it outputs so that the imaging result reproduced from the optical disc 2 can be monitored.
- the system control microcomputer 19 is a microcomputer that controls the operation of the entire video disk device 1, and controls the operation of each unit in response to a user's operation by executing a predetermined processing program recorded in a memory (not shown). I do. As a result, the system control microcomputer 19 records the imaging result on the optical disk 2, reproduces the imaging result recorded on the optical disk 2 and provides it to the user, and further executes the editing process.
- the processing program for the system control microcomputer 19 is installed and provided in advance.
- installation may be performed by recording the data on a recording medium and providing the recording medium.
- various recording media such as an optical disk, a magnetic disk, a memory card, and a magnetic tape can be widely applied.
- FIG. 2 is a schematic diagram showing a basic configuration of the QT file.
- a set of tracks based on actual data forms a media data atom (Media Data Atom), and management information of the media data atom (Media Data Atom) is collected and a movie atom (Movie Atom) is collected. Is formed.
- the atom is also called a box.
- the media data atom has the type name of the atom set to mdat, and is also called a movie data atom (Movie Data Atom).
- a movie atom has an atom type name set to moov, and is also called a movie resource.
- the QT files F l and F 2 include a self-contained file F 1 in which the media data atom and the movie atom are in the form of a body, and an external reference file F 2 in the form of only the movie atom.
- this external reference file F2 A media data atom existing in another file F1 can be set as a management target, so that it can be used for nondestructive editing and the like.
- the management information such as the relative path and the absolute path on the recording medium relating to the other file is added to the movie atom. Assigned.
- FIG. 3 is a chart showing these media data atoms and movie atoms in detail regarding the self-contained file F1.
- the track atom (type name: trak) is provided corresponding to the track based on the actual data.
- Each track atom has a slightly different content depending on the type of the actual data, but is generally the same. Accordingly, in FIG. 3, the track atoms corresponding to the program stream will be described, and the description of the track atoms relating to video and sound will be omitted.
- a stream based on real data of the QT file is allocated to a chunk as a set of samples, and chunks based on each real data are sequentially provided in a cyclic manner.
- FIG. 3 is an example in which a program stream, a video stream, and two sound streams are assigned to actual data.
- the sample shape is indicated by the rectangular shape in the chunk.
- Movie atoms are created in a hierarchical structure in which management information is atomized for each attribute. That is, the movie atom is composed of a movie header atom (movie header), a track atom (track), and the like.
- the movie header atom contains header information and the type name is set to mvhd.
- a track atom (track) is provided for each actual data corresponding to the track provided in the media data atom.
- the track atom (track) is composed of a track header atom (track header), an edit atom (edit), a media atom (media), a user data atom (user data), and the like, and information about each actual data of the media data atom is respectively provided. Is described.
- the track header atom contains header information.
- the edit atom (edit) is used to edit the edit atom (edit list) if necessary. Including this, the edit list atom (edit list) is set so that it can be used for non-destructive editing by setting information such as the time information up to the IN point and the OUT point and the playback speed.
- Various data that can be defined by the user are assigned to the user data atom (user data). In this embodiment, in a track other than the program stream, the user data atom (user data) is used to give priority to reproduction during playback, which will be described later. ) Circumference is defined.
- the media atom (media) For the media atom (media), information for managing the compression method, storage location, display time, etc. of the corresponding real data is assigned, and the type name is set to mdia.
- the media atom (media) includes a media header atom (media header), a media handler reference atom (media handler reference), and a media information atom (media information).
- the header information is assigned to the media header atom, and the type name is set according to the type of the corresponding actual data.
- the type name the type name for the video, sound, and program stream is set.
- the media handler reference atom (media handler reference (indicated by media handler in Fig. 3)) records the type of the corresponding real data, and is set so that video data, sound data, and the like can be identified by IJ. Have been.
- the media information atom includes a media header (madia information header (indicated by a madia header in FIG. 3)) corresponding to actual data, a data handler reference atom (data handler reference in FIG. 3). ndler))), data information atom (data information), sample tape noreatom (sample table).
- the media header contains a type name corresponding to the upper-level media handler reference atom and contains header information.
- the data handler reference atom (data handler reference) is set with information about the handling of the corresponding real data.
- the data information atom (data format) is actually set by the lower-level data reference atom (data reference). Information on the storage location and storage method of the data to be referenced is assigned.
- sample table atom In the sample table atom (sample table), information about each sample is assigned, and the type name is set to stbl.
- the sample table atom (sample tabl e) is a sample description atom (sample description), a time sample atom (time-to-sample), a sample sum atom (sample size), and a sample-to-chunk atom. , A chunk offset atom, a sync sample atom, a composition time-to-sample, and the like.
- the time sample atom (time-to-sample) describes the relationship between each sample and the time axis related to decoding by the frame rate.
- the sample size atom (s ample size) describes the data amount of each sample.
- the sample chunk atom (sample-to-chunk) describes the relationship between a chunk (chunk) and the sumps / les that make up the chunk (chunk).
- a chunk is a block when each track data is blocked and assigned to a media data atom, and one chunk is created from a set of a plurality of samples.
- the chunk offset atom (chunk offset) the position information of the beginning of each chunk with respect to the beginning of the file is recorded by an entry.
- the sample description atom stores information related to decoding, and is specifically assigned a data compression method and related information. That is, as shown in Fig. 4, the sump ⁇ "description atom (sample description) is composed of the size (size), type name (stsd), version, and flag of the sample atom (.sample description). Are sequentially assigned. Also, the number of entries (number of Entries) of this sample description atom (sample description) is allocated, and an entry based on the data compression method and related information (sample description entry) is allocated according to the number of entries.
- sample description atom (sample description) is registered in response to a change in the processing of the actual data related to this entry (sample description entry), and the number of entries (number of Ent ries) is counted up.
- the sample description atom (sample description) includes a field (Frame Count) for describing the number of frames to be allocated to one sample in one of the simple description entries.
- FIG. 6 is an example of an entry corresponding to a program stream composed of two sound streams and one video stream.
- the size of this entry (Size), the data format of the corresponding actual data (Data Format), and the reference index number (Data Reference Index) are provided.
- An atom (Format Atom) and a stream descriptor atom (Stream Descriptor Atom) are sequentially provided.
- identification data indicating the type of the corresponding real data is provided.
- P2ST is assigned, and the corresponding real data is a program stream by the MPEG-2 system. It is done as shown.
- a format atom (Format Atom) and a stream description atom (Stream Descriptor Atom) are provided corresponding to a program stream and an elementary stream constituting the program stream as shown in FIG.
- a format atom (Format Atom) and a stream description atom (Stream Descriptor Atom) are provided corresponding to a program stream and an elementary stream constituting the program stream as shown in FIG.
- two sets of format atom (Format Atom) and stream description atom Stream Descriptor Atom
- the format atom (Format Atom) is assigned an identifier that specifies the actual data related to this correspondence relationship, and P2SI, vide, and soun are set for the program stream, video stream, and sound stream, respectively.
- the stream description atom (Stream Descriptor Atom) is assigned information on the corresponding streaming.
- the stream description atom (Stream Descriptor Atom) related to the program stream has the System information is assigned to the head side, and system auxiliary information is assigned to the succeeding side.
- the entry of the sample description entry (sample description) relating to the video track and the sound track is provided. ) Is allocated, and thereby information necessary for reproducing the video stream and the sound stream is stored.
- the system information is assigned basic information of information necessary for reproduction such as information included in the header of the program stream and information necessary for seamless reproduction of the sound stream.
- system auxiliary information auxiliary information such as information that is effective when editing a stream, and information for selecting a stream to be played back in a device having limited playback functions is assigned.
- the information is divided into two stream descriptor atoms (Stream Descriptor Atom) and assigned, thereby simplifying the management of the information and processing such as reproduction. It is set so that it can be simplified.
- a stream description atom to which system information is assigned is configured as shown in FIG. 7, and stores attribute information of a program stream. That is, in this case, the stream description atom (Stream Descriptor Atora) is provided with a size (Size) and a type (Type) according to the type name strd, a version (Version), various flags (Flags), and a data format (Data Format (Data Format)).
- the stream description atom Stream Descriptor Atora
- a size Size
- Type type
- Video Stream Status Flags Video Stream Status Flags
- the number of streams Number of Streams
- stream information Stream Information
- the video stream flags store information indicating the status of the video stream. As shown in Fig. 8, the video stream is closed GOP by the first one bit. Is indicated.
- the stream information (Stream Information) is included in the stream identifier (Stream Identifier) during the program stream. The identifier of each stream is stored, and the following stream property (Stream Property) indicates the priority in reproducing the corresponding stream.
- the program stream by the MPEG-2 system can be recorded in the QT format. Even when recording is performed in this way, the playback priorities are set among the elementary streams that make up each program stream, so that even devices with limited functions can be used in accordance with the contents of the file. It is configured to be able to play the stream.
- a user data atom related to a track other than the program stream is added to a track property atom (track property y atom) shown in FIG. Is provided.
- a track property atom (track property atom) is provided with a size (Size), a type (Type) based on a type name (tkpt), a version (Version), various flags (Flags), and the like.
- FIG. 11 is a chart showing an example of priorities based on the sample description atom and the user data atom relating to these program streams.
- the program stream is composed of one video stream and two sound streams, and the video stream, the sound stream related to the audio, and the sound property related to the audio are defined by the stream property of the sample description atom related to the program stream.
- the priority of the value 1, value 2, and value 20 is set for the sound streams related to the sound effects.
- two sound tracks are formed separately from the program stream, and the user data atoms of the track atoms related to the two sound tracks have priority over the first and second background music (BGM).
- BGM background music
- the movie atom is configured so that a stream control track (Stream Control Track) can be provided in the media data atom.
- a stream control track Stream Control Track
- control information relating to reproduction is assigned to each stream in the program stream.
- information indicating whether reproduction is valid or invalid is provided in this control information.
- the stream control track is generally not provided in the original state, but is provided by editing.
- the movie atom is provided with a track atom corresponding to the stream control track (Stream Control Track).
- each of the movie atoms has a duration corresponding to the sample table atom set in the track atom. Needless to say, the correspondence between the sample and the program stream can be achieved.
- FIG. 13 is a chart showing sample data of a stream control track.
- the sample data of the stream control track is composed of one or more stream control elements.
- Each stream control element is shown in Fig. 14. As shown in (1), it is composed of a size (Size), a control command (Control Command), a stream identifier (Str earn Identifier), and control data (Control Data).
- the size (Size) indicates the data size of the stream control element by the number of bytes.
- the control command (Control Command) is assigned information indicating specific control of streaming.
- control command (Control Command) has a value of 1, , Is set to indicate whether or not the corresponding stream can be reproduced.
- the stream identifier (Stream Identifier) specifies the streaming to be controlled by the control command. If the control data has a value of 1, the corresponding streaming data is disabled by a value of 0 and a value of 1 as shown in Fig. 16. Instruct the enabler.
- the video in the program stream and the stream identifiers for the two sounds are set to the stream identifiers (Sipi, ID2, ID3), respectively, and the stream control is performed.
- the end of the truck The head sample (Samplel) corresponds to the first sample (Samplel) by specifying the streams 11 and 12 by specifying the stream control element (Stream Control Element) of the sample control (Samplel). It is instructed to output only sound 1 between time tl and t2.
- the stream control element (Stream Control Element) of the following sample (Sample2) designates the streams of sound 11 and 12, respectively, and disables both of them, in order to correspond to this sample (Sample2). From time t2 to time t3, the output of both sound-1 and sound-2 is stopped, and the output of the soundtrack by another track is instructed.
- FIGS. 17 and 18 are descriptions of the stream control track (Stream Control Track) corresponding to the first sample (Samplel) and the subsequent sample (Sample2), respectively.
- each elementary stream constituting the program stream can be easily and finely controlled without having to define each by a track atom.
- this video disc device 1 For each atom setting related to these QT files, this video disc device 1 creates an MPEG-2 program stream into one video stream based on the imaging result and one stereo sound stream. Record on the optical disc 2 by QT file.
- the system control microcomputer 19 controls the overall operation so that the media data atom is recorded on the optical disc 2 by the MPEG-2 program stream, and when the media atom data atom is recorded, the file generator 1
- the system information and the like are set in the sample description atom based on the data related to the program stream acquired in step 5 to form a track atom by the program stream, and the movie atom by the track atom is recorded on the optical disc 2 so as to be recorded. Control behavior.
- a program stream is assigned to one track of the media data atom, and the track is a block of management information corresponding to this track.
- the information needed to play this program stream in the Quantum sample description atom! 3 ⁇ 4 Set the information necessary for the playback of each elementary stream that constitutes this program stream, thereby setting it to be processable in the same way as other real data tracks, and forming a QT file with the program stream.
- This QT file is recorded on the optical disk 2.
- the video disk device 1 records the program stream of the MPEG-2 system on the optical disk 2 in the form of a QT file.
- the system control microcomputer 19 determines the priority of the video stream and the sound stream as 1 and 1 for the video stream and the sound stream, respectively.
- Set 2 to set the playback priority according to the order of the video stream and the sound stream.
- the video data is sequentially encoded by the closed G ⁇ P, and the video stream status flag of the system auxiliary information is set to a flag corresponding to the closed GOP.
- the system control microcomputer 19 instructs each unit to play the movie atom related to the corresponding QT file, and The data of the track atom and so on is acquired by playing back the movie atom. Based on the setting of the movie atom, the system control microcomputer 19 determines whether or not the QT file related to the playback includes an elementary stream other than the program stream of the MPEG-2 system. If it contains an elementary stream, it notifies the user that playback is difficult. In this case, such a file that is difficult to reproduce may not be shown to the user or may not be selectable by the user.
- the sample description atom causes the program stream to consist of one video stream, 1 Determines if it contains more than one sound stream, and if so, notifies the user that it is difficult to play this file as well. Even in this case, such a file that is difficult to reproduce may not be shown to the user or may not be selectable by the user.
- the video stream is composed of a closed GOP by the video stream_status flag in the system auxiliary information. Judgment is made as to whether or not it is composed only of the closed GOP, and the user is notified that reproduction is difficult. Even in this case, such a file that is difficult to reproduce may not be shown to the user or may not be selectable by the user.
- system control instructs the reproduction of the media data atom based on the recording of the movie atom, whereby the program stream of the MPEG-2 system is sequentially reproduced and provided to the user.
- the video signal DV 1 obtained by the imaging means is encoded by the video encoder 11 and input to the file generator 15 as a video stream.
- the acquired sound signal DA 1 is encoded by the audio encoder 12 and the sound stream is input to the fire generator 15, where the program stream of the MPEG-2 system is input. Is generated.
- This program stream is converted into a media data atom of a QT file, and is recorded on the optical disk 2 by a series of subsequent structures.
- the program stream acquires various information necessary for playback and is stored in the memory 15A, and the recording of the program stream is terminated by a user's instruction to end the shooting. Then, a data string of the movie atom is sequentially created by the file generator 15 based on the information held in the memory 15 A, and the data string of the movie atom is recorded on the optical disc 2.
- Q video stream and program stream by mixed-with the sound stream is recorded on the optical disk 2 by the QT file
- a track header and the like are set so as to indicate that the program stream of the MPEG-2 system is actual data, and each atom of the sample table atom is set. Is set so as to correspond to a sample of the media data atom related to this program stream.
- this QT file uses the extension of the sample description atom to reproduce the information necessary to play the program stream and the playback of each elementary stream that constitutes the program stream.
- the information required for the MPEG-2 system is set so that it can be identified by other devices using the resources of this QT file, and furthermore, can be identified with the actual data of other tracks.
- a QT file based on the program stream of the MPEG-2 system can be recorded while maintaining compatibility with the conventional format.
- the program stream of the MPEG-2 system can be recorded on the optical disc 2 by the QT file while maintaining compatibility with various devices.
- the information relating to the program stream is separated into basic information and auxiliary information and assigned to the sample description atom. It is possible to confirm whether only one of these pieces of information can be processed and determine whether or not it can be processed, and this can also significantly improve the user interface.
- the program stream is simply played back, it can be played back using system information based on basic information.
- processing is performed by referring to auxiliary information. Thus, the processing at the time of reproduction can be simplified.
- the video disc device 1 plays the movie atom of this file from the optical disc 2 and plays it according to the setting of this movie atom. It is determined whether it is possible or not. If the playback is successful, the media data atom is played back sequentially, and the video stream and the sound stream are decoded by the processing of the file decoder 16 according to the setting of the movie atom, and the user is provided with the data stream. Provided.
- the information necessary for reproducing the program stream and the information necessary for reproducing the stream constituting the program stream are set in one track atom ⁇ , and the information corresponding to the track atom is set.
- This program list By allocating the stream, the program stream of the MPEG-2 system can be recorded on the optical disc 2 by the QT file.
- the extended data of the sample description atom which is a block of management information that defines the information necessary for reproducing the track
- the program stream and the information necessary for reproducing each elementary stream constituting the program stream are stored. With this setting, it is possible to record a QT file in the MPEG-2 system program stream while maintaining compatibility with the conventional format.
- the user interface can be significantly improved.
- the priority of each elementary stream of the program stream described above with reference to FIG. 9 and the priority of each track described above with reference to FIG. Play these tracks appropriately.
- the QT file according to this embodiment is created with the settings described above for the first embodiment.
- the QT file recorded by the video disc device 1 according to the first embodiment is edited by the editing device, and as a result, as shown in FIG. A sound stream by sound effects is added to the trim to form a program stream, and a QT file is created by this program stream and two sound tracks by background music.
- the editing apparatus for example, the video described above with reference to FIG.
- the sound stream and the QT file with the sound effects input from other sources are used.
- a program stream is created from the video stream and the sound stream to be reproduced, and recorded and held on the optical disk 2 or another recording medium.
- a QT file is created from this program stream and two sound streams of background music.
- the priority is set as shown in Fig. 11 according to the setting by the user. Set.
- the reproducing apparatus it is difficult to reproduce all four sound streams including the two sound streams related to the program stream and the two sound streams based on the peritrack. It is a device with limited resources, so that sound tracks can be selected within the reproducible range according to the priority set in the QT file according to the processing procedures in FIGS. 19 and 20. Reproduce.
- the file decoder 16 and the audio decoder 14 are configured to be able to process a plurality of sound streams corresponding to the reproducing apparatus according to this embodiment. Since the recording / reproducing system is almost the same as the video disk device described above with reference to FIG. 1, the configuration shown in FIG. 1 will be described below.
- step SP1 when the user instructs playback of the QT file, the system control microcomputer 19 proceeds from step SP1 to step SP2, and creates a playback stream list for registering the stream to be played. initialize.
- the playback stream list the number of streams to be played can be registered as many as can be played with the resources of this playback apparatus.
- step SP3 instructs the reproduction of one beat of the QT file in which the playback is instructed, and sets the first trace set in the movie atom. Acquire the quatom of happiness.
- step SP4 the system control microcomputer 19 determines the type of the track lj based on the information of the first track atom acquired in step SP3, and in step SP5, the track is determined to be the MPEG-2 system. Judgment as to whether or not the track atom of the program stream is performed If a negative result is obtained in this case, in this case, since this track atom is the track atom of the sound stream by the 1J track, the step SP5 is executed. Moving to step SP6, the information of the priority set in the user data item of this track atom is obtained. In the following step SP7, the number of reproducible streams has already been registered in the playback stream list, and the priority based on the obtained information is the highest priority among the streams already registered in the playback stream list. Is determined to be lower than the lower one.
- step SP7 the system control microcomputer 19 proceeds from step SP7 to step SP8, where the track atom associated with this information acquisition is obtained.
- step SP8 the track atom associated with this information acquisition is obtained.
- the stream with the lowest priority is selected from the playback target. Exclude and register the track corresponding to the track atom related to this information acquisition in the playback stream list.
- step SP9 the system control microcomputer 19 determines whether or not processing has been completed for all track atoms set in the movie atom. If a negative result is obtained here, step SP 9 to step SP 1 Moves to 0, switches the processing target to the next track atom, and returns to step SP4.
- the system control microcomputer 19 selects a playback target for the sound track assigned to the QT file as a separate track according to the priority order of the user data atom provided in the track atom corresponding to the sound track. Have been chosen.
- step SP12 a variable i for priority processing is initialized to a value of 1, and in the following step SP13, an elementary stream constituting the program stream, the variable i With respect to the elementary stream specified by, the priority information is detected from the system auxiliary information acquired in step SP11.
- step SP 14 the number of reproducible streams has already been registered in the playback stream list, and the priority based on the acquired information in parentheses is the highest priority among the streams already registered in the playback stream list. Judge if it is lower than low.
- the system control microcomputer 19 moves from step SP 14 to step SP 15 and returns to the elementary Register the stream in the playback stream list for playback. Also, in this case, the number of already playable streams If a stream has been registered, the stream with the lowest priority among the registered streams is excluded from the playback target, and the elementary stream associated with this information acquisition is registered in the playback stream list. .
- step SP16 the process proceeds to step SP16.
- the number of reproducible streams has already been registered in the playback stream list. If the priority of the information is lower than the lowest priority stream already registered in the playback stream list, the system control microcomputer 19f directly goes to the step without registering it in the playback track list. Move from step SP14 to step SP16.
- step SP16 the system control microcomputer 19 determines whether or not the processing has been completed for all the elementary streams in the program stream, and if a negative result is obtained here, the process proceeds from step SP16. It moves to step SP17, advances the variable i, and returns to step SP13. As a result, the system control microcomputer 19 sequentially detects each priority set in the sump / description description atom for each elementary stream constituting the program stream, sets the priority as a playback target, and configures the program stream. When the processing for all the elementary streams to be performed is completed, a positive result is obtained in step SP16, and the process moves from step SP16 to step SP9.
- step SP9 When the processing has been completed for all the tracks of this QT file, an affirmative result is obtained in step SP9, so that the processing shifts from step SP9 to step SP18, and this processing step jl ends.
- the system's control microcomputer 19 registers the reproduction target in the reproduction stream list within the range that can be reproduced according to the priority set in the movie atom. Also, according to the registration of this playback stream list, only the corresponding track is played and provided to the user.
- the program stream is recorded by the QT file, and the priority at the time of reproduction is set for each elementary stream constituting the pro-clam and the ram stream.
- Program The trim can be reproduced properly.
- each stream can be set according to the contents of the file. Can be properly reproduced.
- each stream can be appropriately played back according to the contents of the file by selecting the playback target according to the priority order set as described above.
- the sound tracks are mixed and output in accordance with the priorities described in the second embodiment, and accordingly, the priorities set in the QT file are effectively used, and the sound tracks are appropriately used in accordance with the file contents. Play these tracks.
- the QT file according to the present embodiment since it is formed in the same manner as the QT file according to the second embodiment, repeated description will be omitted.
- the file decoder 16 and the audio decoder The recording and playback system is substantially the same as the video disc device 1 described above with reference to FIG. 1, except that the 14 and the like are configured to process a plurality of sound streams corresponding to the playback device according to this embodiment. Therefore, in the following, the configuration of FIG. 1 will be described.
- the system control microcomputer 19 of this playback device detects the priority information and sets the mixing ratio for each stream of the QT file by executing the processing procedures of FIGS. 21 and 22. That is, when the user instructs to play back the QT file, the system control microcomputer 19 proceeds from step SP21 to step SP22 and initializes the sound list.
- the sound list is a list in which the identifier of the sound track is recorded together with the priority. Subsequently, the system control microcomputer 19 proceeds to step SP23, instructs the reproduction of the movie atom of the QT file whose reproduction has been instructed, and acquires the information of the first track atom set in this movie atom.
- step SP 24 the type of the track is determined based on the information of the first track atom acquired in step SP23.
- step SP25 whether the track is a track atom of a program stream by the MPEG-2 system is determined. Judge.
- this track atom is ⁇ ⁇ (because it is a track atom such as a sound stream by the J track, the process proceeds from step SP 25 to step SP 26, It is determined whether or not this track is a sound track. If the track is a video track, a negative result is obtained, and the system control microcomputer 19 executes steps S ⁇ 26 to S S2. 7 and determine whether or not the processing has been completed for all track atoms. If a negative result is obtained here, the processing moves from step S S27 to step S ⁇ 28, and the processing target is processed to the next track atom. Switch to step S ⁇ 24.
- step S ⁇ 26 if a positive result is obtained in step S ⁇ 26, the system control microcomputer 19 moves from step S ⁇ 26 to step S ⁇ 29, and is set as the user data atom of the track atom. To get the priority information.
- step S # 30 the acquired priority information is registered in the sound list together with the identifier of the corresponding track, and the flow proceeds to step SP27.
- the system wholesale microcomputer 19 sequentially obtains the priority information set in the user data atom for the sound track by the U track, and uses the obtained priority information as a sound list. Register with.
- step S ⁇ 25 the system control microcomputer 19 moves from step S ⁇ 25 to step S ⁇ 31.
- the system control microcomputer 19 initializes a variable i to be used for priority processing to a value of 1 and, in the following step SP32, is an elementary stream that constitutes this program stream.
- information indicating the type of the stream is obtained from the system information (format atom) of the sample description atom.
- step SP33 it is determined whether or not the acquired stream is a sound stream. If a negative result is obtained, the process proceeds from step SP33 to step SP34, and the program stream is started. It is determined whether or not the processing has been completed for all the elementary streams of the ream, and if a negative result is obtained here, the process proceeds from step SP34 to step SP35, and after stepping the variable i, Return to step SP32.
- step SP33 the system control microcomputer 19 shifts to step SP33, and then to step SP36, and obtains information on the priority of this stream.
- step SP37 the acquired priority is registered in the sound list together with the identifier for specifying the sound stream, and the process proceeds to step SP34.
- the system control microcomputer 19 sequentially obtains the priority of each sound stream constituting the program stream by using the corresponding sample description atom, and composes the program stream.
- step SP27 When the processing has been completed for all the tracks constituting the QT file, an affirmative result is obtained in step SP27, and the process moves from step SP27 to step SP38.
- the system control microcomputer 19 sets the mixing ratio for each sound track in accordance with the priority registered in the sound list, and in step SP39, the mixing according to this ratio is performed by the audio decoder 14. After that, the process moves to step SP40 to end this processing procedure.
- FIG. 23 is a flowchart showing a processing procedure of the ratio setting according to step SP38.
- the system control microcomputer 19 shifts from step SP 42 to step SP 43, where each of the priorities registered in the sound list is set so that the lowest priority value becomes the value 1.
- the priority value is divided by a predetermined value, thereby normalizing the priority information.
- step SP44 in which information on the priority registered at the top of the sound list is acquired
- step SP45 the acquired normalized priority is acquired.
- the system control microcomputer 19 moves from step SP 45 to step SP 46 and sets the ratio for this track to the value 1
- step SP47 After setting to 0, the process moves to step SP47, and it is determined whether or not the processing has been completed for all the streams registered in the sound list. If a negative result is obtained here, the process moves to step SP48, sets the processing target to the content of the next sound list, and returns to step SP45.
- step SP 45 the system control microcomputer 19 proceeds from step SP 45 to step SP 49.
- the system control microcomputer 19 determines whether or not the normalized priority value is equal to or greater than 10 and less than 50. If a positive result is obtained here, the system control microcomputer 19 proceeds from step SP 49 to step SP 50, sets the ratio to 0.5 for this stream, and then proceeds to step SP 47.
- step SP49 if a negative result is obtained in step SP49, the system control microcomputer 19 moves from step SP49 to step SP51 and sets the ratio to 0 for this stream. Move on to step SP47.
- the system control microcomputer 19 sets the ratio for each stream according to the priority set for each stream. Therefore, when the priority order related to the setting in Fig. 11 is processed by this processing procedure, the ratio is set for each stream as shown in Fig. 24 in comparison with Fig. 11 become.
- the system control microcomputer 19 instructs the audio decoder 14 to process the decoding result so that the playback output of each stream is weighted and added according to the ratio, and the streaming is performed according to the priority. After mixing and outputting, each stream is appropriately reproduced according to the contents of the file.
- each stream is treated equally.
- the mixing ratio is set according to the priority order as in this embodiment, such a prior processing relating to the QT file can be omitted.
- the program stream is mixed according to the contents of the file by mixing and outputting the program stream based on the QT file and the ratio according to the priority set for each elementary stream. The ability to regenerate properly.
- each streaming is processed by combining the processes of the second and third embodiments in the QT file reproducing apparatus. That is, by registering a stream in the playback streaming list according to the priority order, selectively obtain high-priority streaming within a reproducible range, and set a ratio by priority for the high-priority streaming, Streaming is mixed according to this ratio and output.
- the video stream is processed in the same manner.
- the stream in addition to simply outputting by mixing, for streams with a small ratio, when reducing the frame rate, when lowering the resolution, or when lowering the gradation related to color
- the stream may be selected according to the priority within the reproducible range, and the selected stream may be mixed at a ratio according to the priority. The stream can be played properly.
- the program stream can be appropriately reproduced according to the content of the file regarding the video stream.
- a video stream encoded by an open GOP is applied to an editing device that is difficult to process, and the identification information indicating the GOP described above with reference to FIG. Judgment is performed, and if the file is difficult to edit, the user's editing instruction is ignored and the user is notified that editing is difficult.
- FIG. 25 is a flowchart showing a processing procedure of the system control microcomputer 19 relating to this file.
- the system control microcomputer 19 starts this processing procedure, and proceeds from step SP 51 to step SP 52.
- the system control microcomputer 19 instructs the reproduction of the movie atom of the QT file designated by the user, and acquires the information of the first track atom set in the movie atom.
- the system control microcomputer 19 determines the type of the track based on the information of the first track atom acquired in step SP52, and in step SP54, the track is identified as the MPEG-type. It is determined whether or not it is a program stream trace by two systems.
- step SP55 determines whether or not processing has been completed for all track atoms, and obtains a negative result here. Then, the process moves from step SP55 to step SP56, switches the processing target to the next track atom, and returns to step SP53. 'On the other hand, if a positive result is obtained in step SP54, the process moves from step SP54 to step SP57, where the system auxiliary information set in the sample description atom of this track atom is obtained. . In the following step SP58, it is determined whether or not the flag set in this system auxiliary information is set so as to indicate a closed GOP. If an affirmative result is obtained here, step SP58 starts with step SP58. Move to SP55. As a result, the system control microcomputer 19 sequentially acquires the track atoms, detects the MPEG-2 program stream, and determines whether or not the MPEG-2 program stream is based on the closed GOP.
- step SP58 the system control microcomputer 19 sets the status If a negative result is obtained at step SP58, the process proceeds to step SP59, where the QT file specified by this user is set to be uneditable, and then the process proceeds to step SP60 to execute this processing. finish.
- step SP61 from step SP55 when a positive result is obtained in step SP55, and the QT file specified by this user can be edited.
- step S ⁇ 60 ends this processing procedure.
- the identification L indicating whether or not the file is a closed G set in the sample description atom [L [determining whether or not the file can be processed based on the information] enables the program stream to be generated by the QT file. By recording the program stream, it is possible to judge whether or not the program stream can be processed without reproducing and analyzing the program stream, and the user interface can be improved accordingly.
- the present invention is applied to a playback device for a QT file that has been nondestructively edited by setting an edit atom.
- the QT file depending on the settings of the edit atom, for example, as shown in FIG. 26, the original MP EG-2 program and ram stream (FIG. 26 (A)) scenes with the power codes A, B, and C
- the original QT file F1 is formed by creating a resource file with the edit atom set again and setting this original media data atom as an external reference
- FIG. 26 (B) it is possible to create a QT file / F2 set to skip and reproduce scene B.
- the file A QT file set to play Fl and F2 sequentially can be created.
- the present invention is applied to a playback device that plays back a QT file by such an editing process, and at these connections, the processing amount is reduced based on the identification information indicating the GOP described above with reference to FIG. Then, the difference between the playback time on the QT track and the actual playback time is corrected.
- the recording / reproducing system described above with reference to FIG. 1 will be described.
- the system control microcomputer 19 when the user instructs to play this type of file, the system control microcomputer 19 obtains the information of the track atom corresponding to the program stream to be played according to the description of the edit list. Get. Based on this information, the system IJ microcomputer 19 obtains identification information indicating the closed GOP set in the sample description atom.
- the system control microcomputer 19 starts the reproduction of the scene; That is, in this case, when the I picture of the first GOP of scene B is included in scene B, playback of scene B is started from this I picture, and the I picture of the first GOP of scene B is included in scene B. If not, playback of scene B starts from the I picture of the following GOP.
- the reproduction end point of scene A is extended backward from the point indicated by the edit atom by the change of the reproduction start position of scene B in this manner. This changes the stream switching timing to facilitate processing, and corrects the difference between the actual playback time due to this change and the playback time on the QT track.
- all subsequent scenes B are closed GO
- scene B starts playing from the position where it can be played, and the playback of scene A ends accordingly
- the time point may be extended backward from the time point indicated by the edit atom. This makes it possible to change the timing at which the stream is switched so as to facilitate processing, and to correct the difference between the actual playback time due to this change and the playback time on the QT track.
- the edited file may be played back only when all the subsequent scenes B have been coded by closed GOP. Further, when the beginning of the surrounding scene B is an open GOP, the processing may be stopped in the middle. In these cases, it is necessary to notify the user via the user interface.
- the program stream is recorded using a QT file, and when the edited file is played, processing is performed based on the identification information indicating whether or not the closed GOP is set in the sample description item.
- the processing relating to the reproduction of this type of file can be simplified. In this way, it is possible to prevent the occurrence of an error or the stop of the processing during the reproduction, and to reduce the discomfort of the user due to the occurrence of the error or the stop of the processing.
- the present invention is applied to an editing device, and in non-breaking editing by an edit atom, processing is switched according to identification information indicating whether or not the sample is a closed GOP set in a sample description name. Note that, also in this embodiment, a description will be given by diverting the configuration of FIG.
- the system control microcomputer 19 accepts the selection of the edit target and the setting of the edit point in response to the reproduction instruction from the user, sets the edit atom, sets the movie atom by the edit atom, and sets the original atom in the original QT file. Creates a file of the edited result in the external reference format that refers to the set track.
- the closed GOP is set according to the identification information indicating whether or not the sample is a closed GOP set in the sample description atom of the file to be edited. Only QT files that have been coded by the above are accepted for editing. Thus, in this embodiment, processing in the system is reduced, and editing processing can be performed with a simple configuration.
- the program stream is recorded by the QT file, and the processing is switched by the identification information indicating whether or not the closed GOP is set in the sample description atom during the editing processing.
- this editing process can be simplified.
- each stream of the program stream is controlled in detail by a stream control track by applying the present invention to an editing device and a playback device for a file edited by the editing device.
- the sound stream provided in the file is reproduced and output as shown in FIG. Accepts the setting to stop playback output.
- the editing device creates an edit list based on the setting, acquires information on the sound stream assigned to the program stream to be edited from the edit list, and creates a stream control track.
- the playback output period is determined by the edit atom of the corresponding track atom and the sample tape atom. Set the period during which playback output is stopped.
- the editing device sets the stream control track created in this way as a track based on actual data, and allocates resources for the actual data based on other sound tracks and the actual data based on the program stream in a format that refers to the original file. Creates a file of the edited result.
- a plurality of sound streams can be finely controlled, and accordingly, the usability of such a file is improved.
- the stream control track is assigned to the media data atom and provided by the track, so that further editing processing can be performed with reference to the stream control track relating to the editing result created in this manner. Can be performed. In this case, however, if the so-called original stream control track is changed, the changes can be reflected in the other editing results that are referred to in this way, and the processing efficiency and the maintenance are simplified accordingly. Can be achieved.
- FIG. 28 to FIG. 31 are flowcharts showing a processing procedure relating to a reproducing apparatus for reproducing a QT file provided with a stream control track in this way.
- this playback apparatus except that the configuration related to the stream control track is different, the recording and playback system is almost the same as the video disk apparatus 1 described above with reference to FIG. This will be explained.
- step SP71 when the user instructs playback of a file, this processing procedure is started and the process proceeds from step SP71 to step SP72, where the control list is initialized.
- the control list is a list for controlling a sound stream based on the program stream assigned to this file.
- the system control microcomputer 19 initializes the reproduction target list.
- the reproduction target list is a list that specifies reproduction targets for tracks assigned to this file.
- step SP74 the movie The playback of the token determines whether a stream control track exists. If a negative result is obtained here, the system control microcomputer 19 proceeds from step SP74 to step SP75, and acquires the information of the first track atom from the information of the movie atom.
- step SP76 the system control microcomputer 19 detects the type of the corresponding track based on the information of the obtained track atom, and in the following step SP77, determines whether or not this track is an MPEG-2 program stream. to decide.
- the system control microcomputer 19 moves from step SP77 to step SP78, analyzes the edit atom and the sample table atom of this track atom, and in the following step SP79, Based on the analysis result, the playback start time, playback end time, and sound stream identifier are registered in the playback target list for each sample set by the sample table atom.
- step SP80 determines whether or not processing has been completed for all the track atoms, and if a negative result is obtained here, proceeds from step SP80 to step SP81. After moving to the next track atom and returning to step SP76.
- step SP77 if a negative result is obtained in step SP77, the system control microcomputer 19 shifts from step SP77 to step SP82, and performs a half IJ to determine whether or not the corresponding track is a sound track. If a negative result is obtained here, the process moves to step SP80. On the other hand, if a positive result is obtained in step SP82, the system control microcomputer 19 moves from step SP82 to step SP83 and analyzes the edit atom and the sample table atom of the track atom. In the following step SP84, for each sample set by the sample table atom based on the analysis result, the reproduction start time, the reproduction end time, and the corresponding track identifier are registered in the reproduction target list. Move on to
- step SP80 When the processing has been completed for all the track atoms in this manner, a positive result is obtained in step SP80, so that the processing moves from step SP80 to step SP86, and this processing step j is completed.
- the system control microcomputer 19 when no stream control track is provided, instructs the start and end of playback for each sound track and sound stream according to the edit atom set for each track. Generate a target list.
- step SP 74 the process proceeds from step SP 74 to step SP 88 to acquire the track atom information related to this stream control track.
- step SP89 the information of the sample table atom and the edit atom of this track atom is acquired and analyzed, and in the following step SP90, the leading sample is reproduced from the detected stream control track in the following step SP90. I do.
- the system control microcomputer 19 Based on the information of the first sample, the system control microcomputer 19 registers the playback start time, the playback end time, and the identifier of the sound stream set to enable in the control list in the following step SP91. Then, in the following step. SP92, it is determined whether or not the processing has been completed up to the last sample of the stream control track.
- step SP92 the system control microcomputer 19 proceeds from step SP92 to step SP93, sets the processing target to the next sample, and then returns to step SP89.
- the system control microcomputer 19 sequentially acquires information registered as samples in the stream control track and registers the information in the control list.
- step SP92 the system control microcomputer 19 moves from step SP92 to step SP95 because a positive result is obtained in step SP92.
- the system control microcomputer 19 acquires the information of the first track atom from the information of the movie atom.
- step SP96 the system control microcomputer 19 detects the type of the corresponding track based on the acquired track atom information.
- this track is an MPEG-2 program stream. to decide. If a positive result is obtained here, the system control microcomputer 19 moves from step SP97 to step SP98, analyzes the edit atom and the sample table atom of this track atom, and in the following step SP99, analysis The sound stream identifier is obtained from the result.
- step SP100 the system control microcomputer 19 acquires information on the corresponding stream recorded in the control list by using this identifier, and stores this information in a temporary list (DL ist) in a format corresponding to the reproduction target list. Register with.
- step SP101 the playback of the program stream is stopped by the edit atom, and for a certain period of time, the stream control track is corrected by correcting so that no sound stream is played in the temporary list.
- the description is corrected by the description of the edit atom, and in the following step SP102, the record of the temporary list thus corrected is registered in the control target list.
- step SP 103 it is determined whether or not processing has been completed for all sound streams. If a negative result is obtained here, the processing moves from step SP 103 to step SP 104, where processing is performed on the next sound stream. After switching to, return to step SP 10 O.
- step SP 103 when the processing has been completed for all the sound streams, the system control microcomputer 19 moves from step SP 103 to step SP 105 when a positive result is obtained in step SP 103, where all the tracks are recorded. Determine whether or not it has been processed. If a negative result is obtained here, the system control microcomputer 19 proceeds to step SP106 with step SP105, switches the processing target to the next track, and then returns to step SP96.
- step SP97 the system control microcomputer 19 shifts from step SP97 to step SP110, where the track force related to this track atom is the soundtrack. Judgment is made, and if a positive result is obtained, the sample table atom and edit atom are analyzed, and the following steps
- step SP112 the reproduction start time and the like are recorded in the reproduction target list based on the analysis result, and then the process proceeds to step SP105.
- step SP110 the process directly proceeds from step SP110 to step SP105.
- the system controller [1 The microcomputer 19 sets the playback target list sequentially, and when the processing is completed for all the tracks, a positive result is obtained in step SP105. Move to 14 End the management procedure.
- the system control microcomputer 19 controls the overall operation so as to reproduce the sound tracks and sound streams set in the edit list, and records the edit list.
- the operation of the audio decoder 14 is controlled according to the control of the output and non-output of the sound according to the reproduction result, thereby controlling the reproduction related to the sound stream according to the setting of the stream control track. I do.
- the program stream is recorded by the QT file, and the track for controlling the reproduction of the program stream is formed by the same track as the actual data related to the program stream. Can be controlled in detail, and the usability can be improved accordingly.
- the QT file is reproduced by a combination of the stream control track described in the eighth embodiment and the mixing according to the priority described in the third embodiment.
- the QT file can be reproduced with further more detailed control.
- the present invention is not limited to this.
- the case where the control is performed by defining a mixing ratio is defined. Etc. can be widely applied to various controls.
- the present invention is not limited to this.
- a transport stream of MPEG-2, a program stream of various formats, and the like may be used. It can be widely applied to the processing of streams multiplexed with elementary streams by data and sound.
- the present invention is not limited to this, and for example, an ISO Base Media file based on the QT format is used. Format (MPEG4—part 12), Motion J PEG2000 (MJ2) file format, AVC (Advanced Video Coding: MP EG 4 -part 10) file format, etc. It can be widely applied to recording devices, playback devices, and the like.
- the present invention can be applied to, for example, a video disk device.
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Abstract
Description
Claims
Priority Applications (2)
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EP04793075A EP1679892A1 (en) | 2003-10-29 | 2004-10-21 | File recording apparatus, file reproducing apparatus, file editing apparatus, file recording method, file reproducing method, file editing method, program of file recording method, program of file reproducing method, program of file editing method, recording medium in which program of file recording |
US10/595,560 US7624136B2 (en) | 2003-10-29 | 2004-10-21 | File recording device, file reproducing device, file editing device, file recording method, file reproducing method, file editing method, program of file recording method program of file reproducing method program of file editing method |
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JP2003-368318 | 2003-10-29 | ||
JP2003368318A JP2005136537A (ja) | 2003-10-29 | 2003-10-29 | ファイル記録装置、ファイル再生装置、ファイル編集装置、ファイル記録方法、ファイル再生方法、ファイル編集方法、ファイル記録方法のプログラム、ファイル再生方法のプログラム、ファイル編集方法のプログラム、ファイル記録方法のプログラムを記録した記録媒体、ファイル再生方法のプログラムを記録した記録媒体、ファイル編集方法のプログラムを記録した記録媒体、記録媒体 |
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PCT/JP2004/015963 WO2005041570A1 (ja) | 2003-10-29 | 2004-10-21 | ファイル記録装置、ファイル再生装置、ファイル編集装置、ファイル記録方法、ファイル再生方法、ファイル編集方法、ファイル記録方法のプログラム、ファイル再生方法のプログラム、ファイル編集方法のプログラム、ファイル記録方法のプログラムを記録した記録媒体、ファイル再生方法のプログラムを記録した記録媒体、ファイル編集方法のプログラムを記録した記録媒体、記録媒体 |
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US (1) | US7624136B2 (ja) |
EP (1) | EP1679892A1 (ja) |
JP (1) | JP2005136537A (ja) |
KR (1) | KR20060103891A (ja) |
CN (1) | CN1902923A (ja) |
WO (1) | WO2005041570A1 (ja) |
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JP2009064263A (ja) * | 2007-09-06 | 2009-03-26 | Toshiba Corp | メモリ装置 |
US8503862B2 (en) * | 2008-06-12 | 2013-08-06 | Cyberlink Corp. | Systems and methods for identifying scenes in a video to be edited and for performing playback |
EP2543192A4 (en) * | 2010-03-03 | 2013-11-13 | Samsung Electronics Co Ltd | DEVICE AND METHOD FOR RECORDING AND PLACING A MEDIA FILE AND RECORDING MEDIUM THEREFOR |
TW201205314A (en) * | 2010-07-16 | 2012-02-01 | Hon Hai Prec Ind Co Ltd | Method for seeking a document position and a corresponding electronic device |
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JPH0955935A (ja) * | 1995-08-15 | 1997-02-25 | Nippon Steel Corp | 画像および音声符号化装置 |
WO1997035435A1 (en) * | 1996-03-19 | 1997-09-25 | Sony Corporation | Data multiplexing apparatus and method thereof |
JP3421899B2 (ja) * | 1996-04-11 | 2003-06-30 | ソニー株式会社 | データ記録及び/又は再生装置並びに方法 |
JP3389807B2 (ja) * | 1997-02-17 | 2003-03-24 | 株式会社日立製作所 | 画像音声記録再生装置 |
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- 2004-10-21 KR KR1020067008101A patent/KR20060103891A/ko not_active Application Discontinuation
- 2004-10-21 WO PCT/JP2004/015963 patent/WO2005041570A1/ja active Application Filing
- 2004-10-21 CN CNA2004800391353A patent/CN1902923A/zh active Pending
- 2004-10-21 US US10/595,560 patent/US7624136B2/en not_active Expired - Fee Related
- 2004-10-21 EP EP04793075A patent/EP1679892A1/en not_active Withdrawn
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US7624136B2 (en) | 2009-11-24 |
KR20060103891A (ko) | 2006-10-04 |
US20070104466A1 (en) | 2007-05-10 |
EP1679892A1 (en) | 2006-07-12 |
CN1902923A (zh) | 2007-01-24 |
JP2005136537A (ja) | 2005-05-26 |
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