WO2004086759A1 - 記録方法、記録装置、記録媒体、再生方法、再生装置および撮像装置 - Google Patents
記録方法、記録装置、記録媒体、再生方法、再生装置および撮像装置 Download PDFInfo
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- WO2004086759A1 WO2004086759A1 PCT/JP2004/002134 JP2004002134W WO2004086759A1 WO 2004086759 A1 WO2004086759 A1 WO 2004086759A1 JP 2004002134 W JP2004002134 W JP 2004002134W WO 2004086759 A1 WO2004086759 A1 WO 2004086759A1
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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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—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 the same track as the main recording
- G11B27/3027—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 the same track as the main recording used signal is digitally coded
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/46—Embedding additional information in the video signal during the compression process
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
- H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/907—Television signal recording using static stores, e.g. storage tubes or semiconductor memories
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
- H04N9/8063—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals
Definitions
- the present invention relates to a method and apparatus for compressing time-series information such as image information and audio information and recording the compressed information on a recording medium such as a disc, and a reproduction method and apparatus therefor.
- time-series information such as image information and audio information on a recording medium such as a disk, a tape, or a semiconductor memory
- the time-series information for a long time is written in a limited writing area.
- time-series information should be subjected to de-air compression.
- the M P EG Mo v n g P i ct E E E E E p p p G G G G r s G G r u u u p ⁇ ⁇ ⁇ ⁇ method has been widely used.
- an image of each frame (or a field, which is the same as the following, but for simplicity of explanation, only the word “frame” is used in the following description) is compressed. It can be divided into three types of I picture, P picture and B picture.
- An I picture is an image (intra-frame encoded image) which performs closed compression encoding only within one frame.
- the P picture is an image (forward predictive coded image) to be subjected to compression coding using a correlation with an image frame preceding the image frame.
- the B picture is an image (bidirectional predictive coded image) to be subjected to compression coding using the correlation of image frames before and after the image frame.
- the unit of writing / reading to / from the recording medium is composed of so-called GOP (G r o u p i p f i c t u r e) consisting of a plurality of frames.
- Figures 9A to 9B show an example of the GOP.
- I picture and P picture are encoded in the same order as the original picture, but B picture is encoded after I picture and P picture are encoded first.
- the order of the images is rearranged from the original order of the state of FIG. 9A to that shown in FIG. A process of compression encoding is performed on the changed image information (see Japanese Patent Application Laid-Open No. 8-2 1 2 4 5 6).
- P picture performs predictive coding using forward I picture or P picture.
- the B picture is sandwiched between the forward and backward I pictures or P pictures.
- the B picture uses the subsequent I picture or P picture during encoding, as shown in FIG. 9B, the B picture is to be predictively encoded. It rearranges in order of the later I picture or P picture used for. Then, as described later, management information for decoding and reproduction processing is added to the data to be decoded and reproduced, that is, data on a picture unit basis, to the compressed and encoded image data, and the data is recorded on the recording medium. Then, at the time of reproduction of the image data compressed by the MPEG method, management information for decoding and reproduction processing is extracted from the recording data, and the reproduced image in picture units is extracted based on the management information. The output is controlled, and the order of the pictures is restored.
- the frame order is rearranged as shown in FIG. 9B and the image data is recorded.
- the correspondence between the information of each decoding and reproduction unit and the additional information becomes difficult.
- the present invention in consideration of the above points, in the case where the information in the read / write unit to the recording medium includes the information of a plurality of decoded playback units, additional information about each information of the decoded playback unit is The purpose is to provide a method and an apparatus for recording to ensure that the unit response can be taken. Disclosure of the invention
- a method for compressing time series information and recording it on a recording medium wherein management information for decoding and reproduction processing is added to each of the information of the decoding and reproduction unit of the compressed time series information and recorded.
- management information for decoding and reproduction processing is added to each of the information of the decoding and reproduction unit of the compressed time series information and recorded.
- additional information about the information of the decoding reproduction unit for each predetermined time is recorded in association with the management information for the decoding reproduction processing of the information of the corresponding decoding reproduction unit.
- the additional information on the information on the decoding and reproduction unit is recorded in association with the management information for the decoding and reproduction process on the information on the decoding and reproduction unit.
- the management information it becomes possible to associate and reproduce the information of the decryption reproduction unit and the additional information thereof.
- FIG. 1 is a view showing a configuration example of an imaging apparatus to which an embodiment of a recording method according to the present invention is applied.
- FIG. 2 is a view for explaining an example of the configuration of the data encoding and multiplexing processing portion in FIG. 1;
- FIG. 3 is a diagram showing logical arrangement on an optical disc in the D V D-V i d e o format.
- FIG. 4 is a view for explaining an example of the main part of the embodiment of the recording method according to the present invention.
- FIG. 5 is a view for explaining another example of the main part of the embodiment of the recording method according to the present invention.
- FIG. 6 is a view for explaining an example of the configuration of the data separation processing and the data decoder portion in FIG. 1;
- FIG. 7 is a view for explaining another example of the main part of the embodiment of the recording method according to the present invention.
- FIG. 8 is a view for explaining another example of the main part of the embodiment of the recording method according to the present invention.
- FIGS. 9A to 9B are diagrams for explaining reordering of pictures in a GOP in the MP E G system.
- a writable optical disc such as DVD _ R (D costumer Versatile D isc R ecordable DVD-RW (Digita 1 Versatile D isc R e-Writable)) is used as the optical disc.
- the MP EG 2 method is used as the data compression method, and the recorded data is composed of MPEG 2-PS (PS; Program Memory).
- FIG. 1 is a block diagram showing a configuration example of a digital force camera according to the embodiment.
- the digital camera of this example comprises a camera unit 10, a recording and reproduction processing unit 20, and a control unit 30.
- the control unit 30 has a program ROM (R e d O n ally M e ry) 3 0 3 and a work area via the system bus 3 0 2 with respect to the CPU (C entral P rocessing U nit) 3 0 1 for RAM (R and om Acces ess Memory) 3 04 and operation input unit 3 1 for connecting operation input interface 3 0 5 and L CD as a display device (L iq C rystal D isplay) 3 Communication interface such as L CD controller 3 0 6 for connecting 2 and memory card interface 3 0 7 for loading memory 'card 5 0 and USB (Universal Server Bus) Evening face 3 0 8, clock circuit 3 0 9, and I / O port 3 1 0, 3 1 1, 3 1 2, 3 1 3, 3 14 3 1 5 3 1 6 are connected. It is configured.
- a program for controlling the camera unit 10, recording control and reproduction control for captured image information and sound information from the microphone, and other programs are written in the ROM 303.
- the operation input unit 31 has a mode switching key for switching between the shooting mode and other modes such as the playback mode, a zoom adjustment key, a key for exposure adjustment, a shirt evening, a movie shooting key, Several keys such as white balance adjustment keys are provided.
- the CPU 301 analyzes the operation signal from the operation input unit 31 input through the operation input interface 305, and determines which key of the operation input unit 31 has been operated. , Control processing according to the judgment result.
- the image and shooting conditions at the time of shooting are displayed on the L CD 32 under the control of the CPU 300, and the playback image and additional information played back from the recording medium are TC ⁇ O
- the clock circuit 300 measures a clock signal from a reference clock signal generation circuit (not shown) and generates time information representing year, month, day, hour, minute, and second. As a second, you can count the frame unit of the image
- the clock circuit 3 0 9 is configured to generate information with such decimal precision.
- the digital camera of this example is configured to be able to record recording data onto an optical disc 40 (hereinafter referred to as DVD 40), as well as to a memory card 50.
- DVD 40 optical disc 40
- the memory card 50 records compression data through the memory card interface 3 07.
- the communication interface 300 is used, for example, to connect the digital camera of this example to a personal computer and exchange recorded data and other data.
- the camera unit 10 comprises a camera optical system 11, a camera control unit 12, an imaging device 13, an imaging signal processing unit 14, a microphone 15, and an input signal processing unit 16. Be done.
- the camera optical system 11 includes a lens group for imaging an object, an aperture adjustment mechanism, a focus adjustment mechanism, a zoom mechanism, a shirt mechanism, and a flash (flash) mechanism. It has a camera shake correction mechanism.
- the camera control unit 12 receives a control signal passing through the I ZO port 3 10 of the control unit 30 and generates a control signal to be supplied to the camera optical system 1 1. Then, the generated control signal is supplied to the camera optical system 11, and control such as zoom control, shutter control, and exposure control is performed. Not only the control signal corresponding to the operation input at that point in the operation input unit 31 but also the operation input at the operation input unit 31 are the signals sent through the I ZO port 3 1 0 of the control unit 30. Control signals based on imaging conditions set in advance.
- the imaging element 13 is formed of a CCD (CD) (Chage Coupled Device), and the imaging optical system 1 1 The same image is formed. Then, in response to the shutter operation, the image capture timing signal generated from the IZ port 31 1 of the control unit 30 is received, and the subject image formed on the image forming plane is converted into an image capture signal.
- CCD Compact Image
- the imaging signal processing unit 14 performs processing such as gamma correction on the imaging signal and AGC (Au to Gain Control) based on the control through the I / O port 32 of the control unit 30. Also performs processing to convert an imaging signal into a digital signal.
- processing such as gamma correction on the imaging signal and AGC (Au to Gain Control) based on the control through the I / O port 32 of the control unit 30. Also performs processing to convert an imaging signal into a digital signal.
- the microphone 15 collects the sound around the subject at the time of shooting. Then, the audio signal from this microphone 15 is supplied to the input audio signal processing unit 16.
- the input audio signal processing unit 16 performs correction of the input audio signal and processing such as AGC (Au to Gain Control) based on the control through the I / O port 3 1 2 of the control unit 30. Also performs processing to convert audio signals into digital signals.
- AGC Al to Gain Control
- the digital camera of this example has an external microphone terminal, and when an external microphone is connected to the external microphone terminal, the input audio signal processing unit 16 is Is configured to be switched automatically so that an audio signal from the external microphone is supplied instead of the built-in microphone 15.
- the AGC processing in the input audio signal processing unit 16 is different between when the audio signal from the built-in microphone 15 is input and when the audio signal from the external microphone is input. , It is designed to be processed taking into consideration the difference in its characteristics.
- AGC station The switching of the logic is configured to be interlocked with the switching of the input of the audio signal to the input audio signal processing unit 16.
- the recording / reproducing processing unit 20 is composed of D S P (D i g i t i S i n i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1), a DVD signal processing unit 22, a writing Z reading unit 23, and a video / audio output processing unit 24.
- a buffer memory 25 composed of, for example, S D R A M is connected to D S P 21.
- the digital image signal from the imaging signal processing unit 14 and the digital audio signal from the input audio signal processing unit 16 are input to the DSP 2 1, and through the I / O port 3 13 of the control unit 30.
- the shooting information is entered.
- the shooting information input through the I / O port 3 1 3 includes shooting time per frame and shooting condition information.
- the time information from the clock circuit 3 0 9 is read and used as information on the photographing time each time.
- the time information (shooting start time) of the clock circuit 3 0 9 is captured, and thereafter, the relative time (frame number may be a frame number) relative to the shooting start time is taken. It may be used as time.
- the shooting condition information includes both information automatically set and information set by the user.
- exposure control information information for automatic white balance adjustment, digital zoom magnification information, camera shake correction It includes setting information such as information, f-number (f-number), exposure time, AGC gain value, lens focal length and so on.
- information as to whether the built-in microphone 15 or external microphone is used as means for capturing voice information can be included in the information at the time of shooting.
- the information at the time of shooting described above is generated as additional information in frame units of an image and recorded.
- the DSP 2 1 performs automatic white balance control, control for exposure compensation, and digital zoom magnification for digital image signals from the image signal processing unit 14 based on camera information through the I ZO port 3 1 3. Control, etc. Then, D 2 S 2 compresses data of the digital image signal to which such control is added and the digital audio signal from the input audio signal processing unit 16 according to the MP E G 2 method.
- D 2 S P 2 1 performs additional information processing for recording the information at the time of shooting as additional information with the compressed image data and the compressed audio data.
- the DSP 2 1 further performs processing to multiplex compressed image data, compressed audio data, and the above-mentioned additional information into data strings according to the MP EG-PS format. .
- the data of MP EG-PS from the DSP 2 1 is written through the recording signal processing unit of the DVD signal processing unit 22 under the control of the control unit 30 through the I ZO port 3 14.
- the data is supplied to the reading unit 23 and is written to D VD 40 by the writing / reading unit 23.
- the write / read unit 23 is controlled by the control unit 30 through the I / O port 316.
- the data read out from the DVD 40 by the write Z readout unit 23 is supplied to the DSP 21 through the reproduction signal processing unit of the DVD signal processing unit 22.
- the DSP 2 1 separates multiplexed compressed image data, compressed audio data, and additional information. And DSP 2 1 is separated Uncompressed the compressed image data, reproduce the image data in frame unit in the original order, output to the video / audio output processing unit 24 and decompress the separated compressed audio data. The audio data is played back and output to the video Z audio output processing unit 24.
- the video / audio output processing unit 24 receives control of the control unit 30 through the IZ port 35 and processes image data and audio data to be output, and the image data as digital data and Audio data is supplied to the control unit 30 through the I / 0 port 3 1 5, and image signals and audio signals converted to analog signals by DZA conversion are output to the output terminals 26 V and 26 A. Do.
- the reproduced image by the image data input to the control unit 30 through the I / O port 3 15 is reproduced and displayed on the screen of the L C D 32 based on the control of the L C D control 3 0 6.
- the image data from the imaging signal processing unit 14 is subjected to control processing according to the setting conditions and control conditions at the time of imaging, and then the video is transmitted through the buffer 201. It is supplied to the encoding unit 202.
- the video encoding unit 202 forms a GOP consisting of at least one I picture and a plurality of P pictures and B pictures, and this G o P is used as a unit of writing to a DVD as a recording medium, and is compressed. To do. That is, in the video encoding unit 202, first, in the picture order rearranging unit 2021, as described with reference to FIGS. 9A to 9B described above, the order of pictures in the GOP is arranged. Make a change.
- the I picture is subjected to intra-frame coding processing to perform data compression, and for the P picture, the correlation with the forward I picture or P picture is used.
- Inter-frame prediction coding processing is performed to perform data compression
- B-pictures inter-frame prediction coding processing using correlation with forward and backward I-pictures or P-pictures is performed to perform data compression.
- the image data subjected to compression encoding processing in the compression encoding unit 2022 is subjected to variable length encoding processing using a Huffman code or the like in the variable length encoding unit 2023. After being performed, it is supplied to the multiplex unit (multiplexing unit) 2 1 1 through the buffer 2 0 3.
- audio data from the input audio signal processing unit 16 is fetched in synchronization with the imaging timing and supplied to the audio encoding unit 205 through the buffer 204, and a predetermined amount of audio data is received. Audio data (called an audio frame) is compressed and encoded as a decoding and playback unit. The compression encoded audio data is supplied to the multiplex unit 2 1 1 through the buffer 2 0 6.
- the shooting time information input from the IZO port 3 1 3 is supplied to the additional information processing unit 2 0 8 through the buffer 2 0 7 and the additional information to be added in frame units of the image is It is generated. Then, the generated additional information is supplied to the multiplex unit 2 1 1 through the buffer 2 0 9.
- the multiplex unit 21 1 packetizes each of the image data, audio data, and additional information, and multiplexes the image data, audio data, and additional information. In this case, pack headers are added to one or more packet data and grouped to form a pack.
- the multiplexed output data from the multiplex unit 21 1 is output to the DVD signal processing unit 22, and is written to the DVD 40 by the write Z reading unit 23 as described above.
- the decoded reproduction unit of the image data or audio data (image data is in one frame unit, in the audio data is one frame unit)
- Each time, management information called time stamp is added.
- time management information generation unit 210 supplies information on this time stamp from time management information generation unit 210 to multiplex unit 21 1.
- This timestamp is given a time reference by the SCR (Sy s tern C l o ck R e f e r e n e c e; reference value).
- the time stamp is added to the packet header if there is the beginning of the information on the decryption unit in the packet in the multiplex unit 21 1, and if the start of the information on the decryption unit is not in the bucket. Is not added.
- time stamps There are two types of time stamps: PT S (P r e s e t i t i t i t s i t s amp) and DTS (D e cod i n g i t S i t s amp).
- the PTS is time management information of reproduction output of information of decoding reproduction unit. That is, PTS is time management information on when to reproduce and output the information on the decryption reproduction unit.
- timestamp DTS is time management information of decryption of information of decryption reproduction unit.
- both timestamps are added to the packet header, and if they match, generally only the timestamp P T S is added to the packet header.
- the time stamp P T S corresponds to the original arrangement order of the frames of the image data, and is time management information corresponding to each frame one to one.
- the timestamp D T S is not added, only the timestamp P T S is added.
- the additional information is generated corresponding to each frame of the image data.
- the image information in frame units is generated. In other words, in conjunction with the change in the order of the encoding process, it is necessary to devise some correspondence between the additional information of each frame and the image information of the corresponding frame. is there.
- the PTS of the time management information described above corresponds to the original arrangement order of the frames of the image data, and that the time management information corresponds to each frame one to one.
- this PTS as a medium, it is made to associate the image data of a frame unit as a decoding and reproduction unit with the additional information about the image data. The processing of this association is performed in the multiplex unit 21 1.
- the first example of this is the case of recording with the DVD-Vide 0 format.
- the logical arrangement of the recorded data on the optical disc according to the DVD-Video format is as shown in FIG.
- the recording area of the optical disc is divided into a lead-in area, a data zone area, and a lead-out area in order from the innermost circumference side as viewed in the radial direction of the optical disc.
- -Data such as management information and image data are recorded in the evening zone area.
- the data zone area is divided into a UDF (Universal Disk area) area, a VMG (Video area) area, and a real time data recording area in this order from the lead-in area side.
- the UDF area and the VMG area are recording areas of management information for managing files such as image data recorded on an optical disc.
- the UDF area is for enabling a computer to read an optical disc by supporting the UDF standard and the ISO 9660 standard.
- VMG area, t real-time data recording area is a recording area of the DVD management information is Eria for recording image data and Odode Isseki, as shown in FIG. 3 (B), VTS (V ideo T itle Data is recorded in units of data groups called S et).
- VTS is a VT SI (Video Itie Inte mation), VTS M_VO BS (Video Oject S et F orthe VTSMe nu), and VTS TT_VO. It consists of BS (V ideo Object Set F or T itlesina VT S) and VTS I—BUP (Backup of VT SI).
- VT SI Video Itie Inte mation
- VTS M_VO BS Video Oject S et F orthe VTSMe nu
- VTS TT_VO It consists of BS (V ideo Object Set F or T itlesina VT S) and VTS I—BUP (Backup of VT SI).
- the compressed data of MP EG 2-PS format is recorded in VT S TT-VO BS as an information block called VOB U (V id o 0 bject Un it) as a read / write unit.
- the image data contains 1 GOP
- the audio data contains information corresponding to the 1 GOP.
- the VO BU also includes additional information on each of the image data in units of frames making up the GOP.
- VTSI-BUP is backup information of VTSI.
- the read / write unit data VO B U consists of a plurality of pack P CKs.
- a pack PCK consists of one or more packets.
- the pack consists of one packet.
- One pack in this case is as shown in FIG. 3 (F). That is, the top of the pack PCK is a pack header. Then, in the next package Kuhedda, and packet header position, subsequent to the packet header, the packet former bract image data and audio O data t the bucket Doo data is located made of Isseki the image data and Odode is Private 1 ⁇ It is considered as a packet.
- the pack header contains the above-mentioned time-based information SCR.
- a packet start code At the top of the packet header is a packet start code, and in this packet header, flags such as PTS flag and DTS flag Information and timestamp information PTS and DTS are included.
- the PTS flag and the DTS flag indicate whether or not timestamp information PTS and DTS are included in the packet. As described above, timestamp information PTS and DTS are added to the packet when the beginning of the picture is included in the packet.
- the additional information constitutes one pack (one packet) per one frame.
- the packet of additional information includes the corresponding image data timestamp P T S. Therefore, in this example, the additional information packet is in the form of a private 1 packet.
- this additional information pack is multiplexed before the pack of the image data to which the timestamp P TS is added.
- FIG. 4 is a diagram for explaining multiplexing processing of additional information and image data for image data of one GOP, and in order to simplify the explanation, multiplexing for audio data is explained. Omitted.
- 1 G OP consists of 15 frames (1 5 pictures).
- FIG. 4 (A) shows the image data and additional information input to the buffers 201 and 207.
- B 0, B 1, 1 2, B 3, B 4, P 5 ⁇ ⁇ ⁇ P 1 4 is the image data in frame units, also considering the picture type, and B is the B picture.
- I indicate an I picture and P indicates a P picture, respectively.
- each suffix number is given a serial number in frame units regardless of the picture type.
- A0 to A14 indicate additional information on the image frame of each suffix number. That is, each of the additional information A 0 to A 14 is It is additional information for image frames with the same suffix number.
- the image data shown in FIG. 4 (A) is reordered in the picture order in the picture order reordering unit 2 0 2 1 of the video encoding unit 202, and FIG. 4 (B) As shown in.
- the order of the additional information is not changed, so the additional information shown in FIG. 4 (B) is the same as the order of the additional information shown in FIG. 4 (A). It has become. Therefore, as the arrangement order, it is difficult to associate each picture with additional information about it.
- the time stamp PTS which is time management information of reproduction output
- Time stamp PTS # (# is a suffix number, and the smaller the number is, the earlier the time is) shown at the bottom of each picture in Fig. 4 (B) shows the time stamp PTS to be added to each picture. Since the playback output is in the original frame order, the suffix number of each picture and the suffix number of the timestamp PTS are equal.
- timestamps P T S with the same suffix number are given to additional information on each picture. Therefore, even if the picture order is rearranged, it is possible to associate which additional information is for which picture by referring to the time stamp PTS.
- V-PCK indicates a video pack (pack of image data)
- I #,? # ⁇ 8 # indicates that it is compressed image data of each picture shown in FIGS. 4 (A) and 4 (B).
- the timestamp PTS is included in the packet header of the packet including the beginning of each picture.
- the timestamp PTS is included in the pack containing the packet.
- each additional information pack AR I-P CK # (# is a suffix number) is multiplexed immediately before the video pack containing the timestamp PTS, as shown in FIG. 4 (C). Ru.
- the first pack NV_P CK of the VOBU that contains the GOP data is called the navigation pack, and it is used to specify the search information (for example, to which sector the jump should occur). Management information such as control information) is included.
- the additional information includes shooting time information (recording time information) for each frame and camera setting information.
- the camera setting information includes information such as F number, exposure time, exposure program, exposure correction value, AGC gain value, lens focal length, flash, white balance adjustment value, digital zoom magnification, etc. There is.
- the time stamp PTS of the video pack V—PCK is multiplexed one pack at a time immediately before the pack to be added to the bucket header, but the time stamp PTS It is also possible to multiplex one pack at a time immediately after the pack added to the data.
- the pack of additional information for each of the 15 pictures making up the GOP AR I-P CK # has the timestamp PTS of the video pack VP CK added to the bucket header.
- the pack is multiplexed one pack at a time immediately before or after the pack, but additional information packs AR I-P CK # for each of the 15 pictures are collected at a specific position in the VO BU.
- good c the second example be arranged is an example of this case, as shown in FIG. 5 (B), in each of V_ ⁇ BU shown in FIG.
- the additional information pack AR I-P CK 0 to AR I _P CK 14 has been placed together immediately after the navigation pack NV-P CK, but at the end of the VOBU It may be arranged collectively, or may be arranged collectively at an intermediate predetermined position in the VO BU.
- De-multiplexer 2 2 1 separates pack headers and bucket headers from each pack and supplies their header information to control unit 2 20.
- the control unit 220 analyzes the header information and Extract TS and DTS to control decoding processing and playback output of image data, audio data and additional information.
- the demultiplexer * multiplexer 21 supplies compressed image data extracted from the separated image data pack to the video decoder 225 through the buffer 22 2, and extracts compressed image data extracted from the separated audio data pack.
- the audio data is supplied to the audio decoder unit 2 2 6 via the buffer 2 2 3, and the additional information extracted from the separated additional information pack is supplied to the additional information decoder unit 2 2 7 via the buffer 2 2 4.
- the image data is decompressed / decompressed in the order according to the timestamp DTS to restore the image data in frame units, Output to buffer 2 2 8.
- the control unit 220 reads out the image data of the frame unit from the buffer 2 2 8 in the order according to the timestamp PTS contained in the image data pack, and the video signal processing unit 2 3 Control to supply to 1.
- the audio decoder unit 226 sequentially decompresses and decompresses audio data according to the control from the control unit 220 to decompress the audio data and output it to the buffer 229. Then, the control unit 220 reads out audio data from this buffer 229 in the order according to the time stamp PTS contained in the audio data pack, and sends it to the audio signal processing unit 2 32 Control to supply.
- the additional information decoder unit 2 2 2 7 reproduces the additional information on the image data of the frame unit under the control of the control unit 2 2 0 and outputs it to the buffer 2 3 0.
- the additional information is information AV for controlling image data, information for controlling audio data A A and display information Ad such as shooting date and time are generated and output to the buffer 230 respectively.
- the control unit 220 reads out additional information on the image data in units of frames from this buffer 230 in the order according to the time stamp PTS included in the additional information pack.
- the video signal processor 2 3 1 the audio data control information A a, the audio signal processor 2 3 2, the display information Ad is an O SD (On S creen D islay) circuit 2 3 Control to supply to 3 respectively.
- the control signal AV of the image data and the control information A of the audio data control are supplied from the buffer 2 3 0 to the video signal processing unit 2 3 1 and the audio signal processing unit 2 3 2.
- the control information AV and Aa are image data and audio data of the corresponding frame, and are automatically associated. Therefore, for the image data and audio data, appropriate control processing is performed by the corresponding control information AV and Aa.
- the video signal processing unit 21 performs image data processing according to the control information AV of the image data. For example, it performs image data control according to the auto white balance adjustment at the time of shooting.
- audio data control processing is performed according to the audio data control information Aa.
- Display information A d is display information such as shooting date, shooting time, and zoom magnification, and is supplied to the combining unit 2 34 via the OSD circuit 2 3 3 and an image from the video signal processing unit 2 3 1 Synthesized into data.
- the image data from the combining unit 234 is supplied to the control unit 30 through the video / audio output processing unit 24 and displayed on the screen of the L CD 32.
- the image data and the display information A d of the additional information are read out from the buffers 2 2 8 and 2 3 0 based on the same time stamp PTS for the corresponding frame and synthesized. As a result, the frame-by-frame shooting time will be displayed correctly on the LCD 32 screen.
- the additional information is for each of the image frames
- additional information on 15 pictures (frames) in the OBU may be recorded collectively.
- FIG. 7 shows an example of the data format in that case. That is, in this example, for each of the VO BUs shown in FIG. 7 (A), as shown in FIG. 7 (B), a navigation pack NV ⁇ P
- the additional information pack AR I _P CK a set of additional information about each image frame and PTS is included for the 15 image frames constituting the GOP. That is, as shown in FIG. 7 (C), the additional information on each image frame is delineated as AR I-DT # (# is a frame number) and the time stamp PTS added to the image frame. A pair of data # that is mapped to # generates an ARI — SET #. Then, 15 sets of data AR I-S ET 0 to AR I-S ET 14 for 1 5 frames constituting the GOP should be included in the additional information pack AR I-P CK in order. Make it
- private 1 ⁇ packets can be used as packets of bucketed AR I-P CK for additional information as in the previous example, but the private 2 shown in FIG. 7 (D) ⁇ Packets are also available.
- PTS is detected from each set of data AR I-S ET and, using this PTS, as in the above-mentioned example, image data and image data are used.
- image data and image data are used.
- the additional information pack to which the timestamp PTS is added and the video including the PTS in the bucket header, regardless of the reordering in the picture order, remains in the original chronological order.
- the pack V is added before (or after) the P CK, the PTS is included in the bucket header as well as the additional information, according to the reordering of the picture order of the image data.
- the video pack V-P CK and the additional information pack AR I-P CK have the same PTS contained in the packet header, so that they can be easily matched. become.
- the pack ARI-PCK of the additional information is a video pack of the image frame to which the additional information corresponds, and the PTS is added before or after the pack included in the bucket header. Therefore, the correspondence between the additional information and the image frame to which the additional information corresponds can be easily related to the additional information even if there is no PTS.
- the pack of additional information ARI-PCK is a video pack of the image frame to which the additional information corresponds, and the PTS is a buckethead header.
- the packet of the additional information pack can be the private 2.
- the fourth other example is a modification of the example shown in FIG. 5 and the additional information pack ARI—PCK does not include the timestamp PTS. That is, in the fourth other example, when the image data is restored, the PTS returns to the original picture order (frame order) and the image is reproduced based on the PTS.
- the additional information pack ARIPCK is also arranged in the order in which it is performed. Therefore, The additional information pack AR I-PCK is arranged in the order as shown in FIG. 5 (B).
- the additional information corresponding to each image frame is sequentially returned to the original image frame whose reproduction order has been restored and output.
- the output it can be used as control information and display information in correspondence with the restored reproduction output image data and audio data.
- additional information is generated and added for each image frame, but additional information may not be generated for all image frames.
- This sixth other example is an example of that case, and in this example, for example, one frame for every two image frames, one frame for every three image frames,...
- additional information about the image frame is generated for the image frame and associated with the management information for the decoding and playback process for the image frame.
- PTS timestamp
- additional information on the image frame is synchronized with the reproduction of the information on the image frame as a decoding and reproduction unit for each predetermined time. It is easy to reproduce and use it.
- the additional information when the additional information is a recording time, the recording time for the image frame in which the additional information is not recorded can be easily obtained by calculation from the recording time as the additional information recorded. Further, as for image frames in the vicinity of an image frame in which additional information is recorded, the additional information may be used as additional information on image frames in the vicinity thereof.
- the recording method and the reproducing method according to the present invention are not limited to the case where they are applied only to the above-described imaging device, and can be applied to various electronic devices that compress and record image data and audio data. It goes without saying that there are certain things.
- the above example has mainly described the case where additional information is added to one frame unit of image data, it is also possible to add additional information as a decoding reproduction unit as a frame of audio data.
- additional information on each piece of information on the decoding and reproduction unit is recorded so that the correspondence on each decoding and reproduction unit can be reliably taken. Can.
- the additional information on the information on the decoding and reproduction unit is recorded on the recording medium so that the correspondence on the decoding and reproduction unit can be reliably taken.
- signal control such as correction control becomes possible based on the additional information for the information of the decoding and reproduction unit
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP04714002A EP1615432A4 (en) | 2003-03-25 | 2004-02-24 | METHOD, DEVICE, RECORDING MEDIUM, METHOD, REPRODUCTION DEVICE, AND IMAGE CAPTURE DEVICE |
US10/511,609 US7675555B2 (en) | 2003-03-25 | 2004-02-24 | Recording method, recording apparatus, recording medium, reproduction method, reproduction apparatus and image pickup apparatus |
Applications Claiming Priority (4)
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JP2003083143 | 2003-03-25 | ||
JP2003-083143 | 2003-03-25 | ||
JP2003-172780 | 2003-06-18 | ||
JP2003172780A JP3912536B2 (ja) | 2003-03-25 | 2003-06-18 | 記録方法、記録装置、記録媒体、撮像装置および撮像方法 |
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PCT/JP2004/002134 WO2004086759A1 (ja) | 2003-03-25 | 2004-02-24 | 記録方法、記録装置、記録媒体、再生方法、再生装置および撮像装置 |
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US (1) | US7675555B2 (ja) |
EP (1) | EP1615432A4 (ja) |
JP (1) | JP3912536B2 (ja) |
KR (1) | KR101015737B1 (ja) |
TW (1) | TWI249286B (ja) |
WO (1) | WO2004086759A1 (ja) |
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EP1615432A1 (en) | 2006-01-11 |
TWI249286B (en) | 2006-02-11 |
TW200501561A (en) | 2005-01-01 |
US7675555B2 (en) | 2010-03-09 |
KR20050111722A (ko) | 2005-11-28 |
KR101015737B1 (ko) | 2011-02-22 |
US20050175321A1 (en) | 2005-08-11 |
JP3912536B2 (ja) | 2007-05-09 |
JP2004350251A (ja) | 2004-12-09 |
EP1615432A4 (en) | 2008-12-10 |
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