WO2006129546A1 - 記録再生装置、記録媒体、及び集積回路 - Google Patents
記録再生装置、記録媒体、及び集積回路 Download PDFInfo
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- WO2006129546A1 WO2006129546A1 PCT/JP2006/310438 JP2006310438W WO2006129546A1 WO 2006129546 A1 WO2006129546 A1 WO 2006129546A1 JP 2006310438 W JP2006310438 W JP 2006310438W WO 2006129546 A1 WO2006129546 A1 WO 2006129546A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00007—Time or data compression or expansion
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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
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- G—PHYSICS
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- 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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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
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- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
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- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/188—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a video data packet, e.g. a network abstraction layer [NAL] unit
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- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/4147—PVR [Personal Video Recorder]
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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- 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
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
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- 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
- H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- 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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- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
Definitions
- the present invention relates to a recording / reproducing apparatus that compresses and records a digital video signal and reproduces the recorded video data, and more particularly to a technique for recording a digital video signal when compression processing capability is limited.
- a recording / playback device for receiving video content such as a digital broadcast program, recording the video content on a recording medium such as a hard disk recorder, and playing the video content.
- Processing to encode and compress video signals is generally performed in accordance with MPEG-2 system standards, etc.
- the amount of computation of predictive encoding processing related to compression increases as highly accurate compression is performed. Since it becomes enormous and time is required for the code compression process, it is necessary to perform the code compression process using the processing capacity of the recording / reproducing apparatus as much as possible.
- digital signals in formats other than the MPEG system such as digital audio data already recorded on a CD (Compact Disc)
- CD Compact Disc
- the recording method of Patent Document 1 is known. This recording method records contents in a transport stream format in a batch without compressing digital content in a format other than the MPEG system.
- Patent Document 1 JP-A-9-261237
- the conventional recording / reproducing apparatus may not accept a request for recording another video content until the recording process related to the previously received recording request is completed due to the limitation of the compression processing capability, Reduce the amount of computation and compress and record. Therefore, it is a problem not to accept the request, but there is a problem even when the request is accepted and compressed and recorded, since the image quality during reproduction generally decreases accordingly.
- the present invention accepts a video content recording request from a user even when a user requests to record a plurality of video content, and prevents the video content of V and misalignment from deteriorating in image quality. It is an object of the present invention to provide a recording / reproducing apparatus that enables recording as much as possible by compressing and reproducing the recorded video data.
- a recording apparatus is a recording apparatus that records video data on a recording medium based on an acquired non-compressed digital video signal, the non-compressed digital video
- a compression means for compressing the video signal in units of frames
- a predetermined selection method for selecting whether to record the compressed video data or uncompressed video data.
- Each video data and video data based on an uncompressed digital video signal is given time information indicating the display timing for each predetermined unit, and whether the video data is compressed or uncompressed video data.
- recording means for sequentially recording on the recording medium so as to be identified.
- the playback device is a playback device for playing back video data recorded on a recording medium by the recording device, wherein the video data is read every predetermined amount, and the read video data is A discriminating means for discriminating between compressed video data and uncompressed video data, and decompressing the video data discriminated as video data after compression by the discriminating means, and extracting time information attached to the video data First extracting means for extracting the time information given to the video data determined to be uncompressed video data by the determining means, and the video data decompressed by the first extracting means.
- the video data is output at a timing based on the time information extracted by the first extraction means, and the video data determined to be the uncompressed video data is based on the time information extracted by the second extraction means. And an outputting means for outputting at Min grayed.
- the recording medium according to the present invention is a recording medium on which video content is recorded, and the video content includes video data after compression for each frame and time information indicating a display timing of the video data. And the uncompressed video data and the time information of the video data, and is characterized in that the compressed video data can be distinguished from the uncompressed video data.
- time information indicating the display timing of each video data is added and recorded to each of a predetermined unit of uncompressed video data and compressed video data. Regardless of whether uncompressed video data or compressed video data is selected, the selected video data is continuously recorded on the time axis. Therefore, when playing back recorded video data, the video content indicated by the received digital video signal is played back if the image of each video data is displayed based on the time information given to each video data. can do.
- the predetermined selection method is a method of selecting so as to maintain a constant image quality standard, for example, the image quality of the video content can be prevented from being deteriorated and recorded as much as possible.
- Video data can be expanded and played back according to the video data.
- the recording apparatus may further include a force frame unit in which compression is performed so as to satisfy a predetermined image quality standard based on video data before and after compression by the compression unit.
- the predetermined selection method selects the video data after compression when the determination unit determines that the criterion is satisfied, and determines that the criterion is not satisfied.
- the non-compressed video data can be selected, and the recording means can add the time information to each video data selected according to the predetermined selection method to identify whether the video data is compressed or uncompressed video data. Or record it as a transport stream.
- the determination unit determines that the compressed video data does not satisfy the predetermined image quality standard, time information is added to the uncompressed video data and recorded.
- the compressed video data has a constant image quality standard. If not, uncompressed video data is recorded, so that it can be recorded with a certain image quality standard.
- the determination unit expands the video data compressed by the compression unit for each frame, calculates a difference between pixel values of corresponding pixels of the expanded video data and the uncompressed video data, When the difference sum of the frame is equal to or greater than a predetermined threshold value, it is determined that the criterion is satisfied, and when it is less than the threshold value, it is determined that the first criterion is not satisfying the criterion.
- the determination unit compares the image data obtained by decompressing the compressed video data of each frame with each pixel value corresponding to the uncompressed video data of the frame, thereby determining a predetermined image quality standard. Therefore, even if multiple compression recording processes are accepted, even if the compression rate is reduced, the image quality of the entire frame can be judged, and the compression performance deteriorates for each frame. Can easily determine whether or not
- the recording means makes it possible to identify whether each video data to be recorded is compressed video data or non-compressed video data by setting a value of the adaptation field control.
- transport stream packetization is performed without including the adaptation field.
- uncompressed video data is recorded, the uncompressed video is recorded in the adaptation field.
- the transport stream packet is performed and each transport stream packet is recorded on the recording medium.
- Video data can be stored in the adaptation field, so that uncompressed video data can be recorded in accordance with the existing MPEG-2 system standard without providing a new definition for storing in transport packets. Can do.
- the recording device further reads out the video data recorded on the recording medium, determines whether the read-out video data is compressed video data or non-compressed video data, and uncompressed video data
- the video data is compressed by the compression means, the time information given to the video data is given again, and the uncompressed video data is converted to the compressed video data to which the time information is given again. It is also possible to provide a recompressed recording control means for replacing and recording on the recording medium!
- FIG. 1 shows a functional block diagram of a recording / reproducing apparatus according to Embodiment 1.
- FIG. 2 is a diagram illustrating a relationship between a control signal and a transport stream.
- FIG. 3 is a diagram illustrating the structure of a transport stream packet.
- FIG. 4 A diagram showing the structure of an adaptation field.
- FIG. 5 is a diagram showing the structure of a PES packet.
- FIG. 6 is a diagram showing the structure of a PES packet.
- FIG. 7 is a diagram showing a bit configuration of uncompressed video data.
- FIG. 8 is a diagram illustrating a luminance signal and a color difference signal in each pixel of the original image.
- FIG. 9 is a flowchart showing a recording process of the recording unit according to the first embodiment.
- FIG. 10 is a flowchart showing a reproduction process of the reproduction unit according to the first embodiment.
- FIG. 11 shows a functional block unit of a recording / reproducing device according to Embodiment 2.
- FIG. 12 is a flowchart showing a re-recording process according to the second embodiment.
- the recording / reproducing apparatus conforms to the MPEG-2 system standard, for example, Recording / playback device capabilities
- MPEG-2 system standard for example, Recording / playback device capabilities
- multiple compression processing is performed in parallel, such as dubbing processing of other video content.
- compression is performed with a reduced image quality, for example, by reducing the compression rate so as to reduce the computational load related to compression.
- each compressed video data when performing compression processing within a certain limit of compression processing capability, each compressed video data (hereinafter referred to as "compressed video data") .) Adds time information indicating the display time of each video data, records it as a transport stream (TS) packet on a recording medium, accepts a compression recording request exceeding a certain limit of compression processing capacity, When compression processing is performed at or below the image quality standard, time information indicating the display time of each video data is added to each video data based on the uncompressed digital video signal, and recorded in a recording medium in the TS packet format. .
- TS transport stream
- a predetermined image quality standard is satisfied is determined by comparing the result of decoding compressed video data for each frame with uncompressed video data (hereinafter referred to as "uncompressed video data"). Therefore, when it is determined whether or not the image quality after compression in the frame is greater than or equal to a predetermined standard and the image data is recorded, whether the compressed image data is determined based on the control signal indicating the determination result.
- One of the compressed video data is recorded on a recording medium.
- Fig. 2 (a) exemplifies a control signal indicating whether or not the image quality after compression is greater than or equal to a predetermined standard, and indicates that compression satisfying the predetermined standard was performed in a section where the signal level was low. , HIgh indicates that compression not satisfying the predetermined standard was performed.
- Figure (b) shows a digital video signal compressed bit stream converted into PES packets for each frame.
- Figure (c) shows video data based on an uncompressed digital video signal. Speak.
- FIG. 4D shows video data selected in accordance with the level of the control signal shown in FIG. As shown in the figure, when the control signal is Low, the compressed video data that was PES packetized is recorded as TS packets, and when it is High, uncompressed video data is recorded as TS packets. To integrate digital video content Can be recorded as one TS.
- the adaptation field control of the TS packet is used as information for identifying whether or not the video data recorded on the recording medium is the compressed video data.
- set the adaptation field control value to "01”
- TS packetize so as not to include the adaptation field
- Sets the adaptation field control value to “10” or “11” and sets the TS packet to include the adaptation field.
- the compressed video data is based on the adaptation field value in each TS packet. Or non-compressed video data, and playback processing of each video data is performed at a timing based on time information included in each video data.
- FIG. 1 shows a functional configuration diagram of the recording / reproducing apparatus according to the present embodiment, and the recording / reproducing apparatus includes a recording unit 100 and a reproducing unit 200.
- the recording unit 100 includes a compression unit 110, a first PTS adding unit 130, a second PTS adding unit 140, a TS unit 150, and a storage unit 160.
- the compression unit 110 includes a compression encoding unit 111 and a determination unit 120.
- the compression code unit 111 obtains an uncompressed digital video signal, encodes and compresses the digital video signal at a predetermined compression rate using inter-frame information for each frame, and the compressed data.
- the local decoder 121 has a function of sending the compressed data that minimizes the difference between the decoded data to the first PTS adding unit 130. Note that, for example, when two or more video content recording requests are received, and when a recording request exceeding a certain limit of the compression processing capacity is received, the video signal is compressed at a lower rate than the normal compression rate. To do.
- the determination unit 120 described later determines whether or not the image quality of the compressed video data satisfies a predetermined standard, and the predetermined The compressed video data that satisfies the standard is sent to the first PTS adding unit 130.
- the video data decoded by the local decoder 121 and the video data of the uncompressed frame for the frame immediately before the frame are compressed. Based on this, encoding compression is performed.
- the determination unit 120 includes a local decoder 121 and a difference comparison unit 122, and has a function of determining whether or not compression satisfying a predetermined image quality standard has been performed.
- a local decoder 121 and a difference comparison unit 122, and has a function of determining whether or not compression satisfying a predetermined image quality standard has been performed.
- each unit of the determination unit 120 will be described.
- the local decoder 121 has a function of decoding the compressed video data and sending the decoded video data to the compression encoding unit 111 and the difference comparison unit 122.
- the difference comparison unit 122 calculates the difference between the pixel values of the decoded video data for one frame and the uncompressed video data corresponding to the video data, and the calculated total difference is equal to or greater than the threshold value. If it is equal to or greater than the threshold value, a low level control signal is sent to the TS unit 150, and if it is less than the threshold value, a high level control signal is sent to the TS unit 150.
- the first PTS assigning unit 130 has a function of assigning a presentation time stamp (hereinafter referred to as “PTS”) indicating the display timing of each frame to the compressed video data, sending it to the TS converting unit 150 as a PES packet.
- PTS presentation time stamp
- the second PTS adding unit has a function of acquiring an uncompressed digital video signal, adding a PTS for each frame, and sending video data indicating each pixel value of the frame to the TS converting unit 150. .
- the TS unit 150 acquires the control signal, the PES packet including the compressed video data, and the uncompressed video data, and selects either the PES packet or the uncompressed video data according to the signal level of the control signal.
- the selected video data is TS packetized, and the TS packet is stored in the storage unit 160 as one TS.
- the TS unit 150 when selecting a PES packet, that is, compressed video data, the TS unit 150 sets the adaptation field control value to “01”. The PES packet is inserted into the payload of the TS packet having the same PID so that the adaptation field is not included. Also, when selecting uncompressed video data, the TS conversion unit 150 sets the adaptation field control value to “10” or “11”, and the adaptation of TS packets having the same PID is performed. Insert uncompressed video data of the specified size into the field.
- the storage unit 160 is realized by a recording medium such as a hard disk, acquires the TS packet transmitted by the TS unit 150, and adds an arrival time stamp (ATS) indicating the arrival timing of the TS packet to the TS packet. And has a function of storing.
- a recording medium such as a hard disk
- the playback unit 200 includes a reading unit 210, a TS separation unit 220, a first PTS extraction unit 240, a decoding unit 250, a second PTS extraction unit 230, and a display control unit 260.
- the reading unit 210 has a function of reading the TS stored in the storage unit 160 based on the ATS added to the TS packet.
- the TS separation unit 220 sends out a PES packet to the first PTS extraction unit 240 according to the adaptation field control value of the TS packet header for each TS packet of the read TS, and is stored in the PES packet.
- the current elementary stream (ES) that is, the compressed video data is sent to the decoding unit 250.
- the data stored in the second PTS extraction unit 230 hair duplication field is sent out, and the display control unit 260 stores the data in the hair duplication field. It has a function to send uncompressed video data.
- the first PTS extraction unit 240 has a function of extracting the header strength PTS of the received PES packet and sending the PTS to the display control unit 260.
- the decoding unit 250 has a function of acquiring and decompressing the compressed video data, and sending the decompressed video data to the display control unit 260.
- the second PTS extraction unit 230 has a function of acquiring data stored in the adaptation field, extracting the PTS, and sending it to the display control unit 260.
- the display control unit 260 decodes the decoded video data and uncompressed video data, and the video data. It has a function to acquire a PTS corresponding to the data and display each video data on the display at a timing based on the PTS.
- FIG. 3 (a) shows the data structure of a standard TS packet that is TS packetized by the TS unit 150.
- Syntax 31 shows the structure of the bit stream containing the compressed video data, and No. of B its 32 shows the number of bits of the structure shown in Syntax 31! /.
- the adaptation_field_control field 33 is a field indicating whether or not an adaptation field is included. As shown in 34 and 35 in the figure, the value of the adaptation_field_control field 33 is If “10” or “11”, the TS packet includes an adaptation field. If the value of the adaptation_field_control field 33 is “01” or “11”, only the data byte of the PES packet is used. It consists of a field and PES packet data notes.
- the data_byte field 36 indicates that data of a PES packet described later is stored.
- FIG. 4 shows the structure of the adaptation field
- transport private—data—ilagd7ii, Tap Ding ⁇ Neonfi ⁇ Nored
- Private_data_byte38 is a user data field, and uncompressed video data for each frame is stored in this field so that it fits within 184 bytes excluding the header of the TS packet. Store in 8-bit units.
- Figures 5 and 6 show the structure of a standard PES packet that stores compressed video data.
- the fields that characterize the present invention will be described.
- PTS_DTS_flags 41 is a field indicating whether or not the PTS field is included in the PES packet. As shown in the figure, PTS_DTS_flags 41 is set to “10” when the PES field has a PTS field.
- the PTS field 42 is a field for storing time information indicating the timing for displaying the video data in the PES packet.
- the PTS is assigned in the format shown in the PTS field 42 in FIG.
- PES_private_data_flag43 is a field indicating whether the PES packet includes the PES_private_data field! /. If the PES_private_data field is included, PES_private_data_flag43 is set to "1".
- the PES_private_data field 44 is a field for storing 128-bit user data.
- PES_packet_data_byte 45 is a field for storing the compressed video data, and the compressed video data is stored in 8 bits so as to fit in 184 bytes excluding the TS header portion of the TS packet.
- Fig. 7 shows an example of bit configuration of uncompressed video data when storing uncompressed video data in private_data_byte.
- each uncompressed video data packet is Non_encode_packet51 and the packet configuration is shown. Newly defined.
- non_enc_start_code_prefix 52 is a field indicating the start code of a packet of uncompressed video data, and is represented by 16 bits in the present embodiment.
- the PTS field 53 indicates the PTS of each uncompressed video data stored in the Non_encode_packet 51. As shown in the figure, the PTS is set in the same format as the PTS of the PES packet described above.
- N shown in 54 of FIG. 8 indicates N which is the number of pixels in the horizontal direction of the original image 55 shown in FIG. 8, and M indicates M which is the number of pixels in the vertical direction.
- Y [i, j], Cb [i, j] and Cr [i, j] indicate the luminance signal and color difference signal for the pixel 56 of the original image 55, and the luminance signal and color difference signal for each pixel in each image. Is inserted after PTS field 53.
- FIG. 9 is an operation flowchart showing a recording process of the recording / reproducing apparatus according to the present embodiment. Hereinafter, description will be made with reference to FIG.
- the compression code key unit 111, the difference comparison unit 122, and the second PTS adding unit 140 receive the uncompressed digital video signal.
- the compression code unit 111 compresses the received digital video signal for each frame, and sends the compressed video data after compression to the first PTS adding unit 130 and the local decoder 121 (step S 11).
- the first PTS assigning unit 130 assigns a PTS to the frame indicated by the compressed video data received in step S11 to form a PES bucket (FIG. 4), and sends the PES packet to the TS unit 150. Send a message.
- the second PTS adding unit 140 follows the bit structure of the Non_encode_packet shown in FIG. 5 for the received uncompressed video data! Is set, and a packet including the luminance signal and the color difference signal of each frame is sent to the TS unit 150 (step S12).
- the local decoder 121 expands the compressed video data received from the compression encoding unit 111 and sends the expanded decoded video data to the difference comparison unit 122.
- the difference comparison unit 122 includes the decoded video data decoded by the local decoder 121, Based on the uncompressed video data received in step SI1, the corresponding pixel values are compared to calculate a difference, and it is determined whether or not the sum of the frame differences is greater than or equal to a threshold (step S13).
- step S13 When it is determined in step S13 that the difference is not greater than or equal to the threshold by the difference comparison unit 122, that is, when it is determined that the compression of the frame exceeds the predetermined image quality standard (step S13: Y) Then, the difference comparison unit 122 transmits a low-level control signal to the TS conversion unit 150 (step S14).
- the TS unit 150 When receiving the low-level control signal from the difference comparison unit 122, the TS unit 150 receives the first of the video data received from the first PTS adding unit 130 and the second PTS adding unit 140 in step S12. The PES packet including the compressed video data received from the 1PTS adding unit 130 is selected (step S15).
- TS conversion section 150 sets "01" in adaptation_field_control33 of the TS header, and inserts the PES packet selected in step S15 into data_byte36 of the TS packet.
- the TS packet is transmitted and the TS packet is stored in the storage unit 160 (step S16).
- step S13 if the difference comparison unit 122 determines that the difference is greater than or equal to the threshold, that is, if it is determined that the compression of the frame does not exceed the predetermined image quality standard (step S13: N ), And sends a high level control signal to the TS unit 150 (step S 17).
- the TS conversion unit 150 Upon receiving the high-level control signal from the difference comparison unit 122, the TS conversion unit 150 receives the video data acquired from the first PTS adding unit 130 and the second PTS adding unit 140 in step S12. Among them, Non_encode_packet including uncompressed video data is selected (step S18).
- the TS unit 150 sets “10” in the adaptation_field_control33 of the TS header, and sets the Non_encode_packet (FIG. 4) selected in step S18 to the private_data_byte field 38 of the adaptation field.
- the TS packets are sequentially inserted into (FIG. 4), TS packets are received, and the TS packets are recorded in the storage unit 160 (step S19).
- FIG. 10 is an operation flowchart showing the playback process of the recording / playback apparatus according to the present embodiment. Hereinafter, description will be made with reference to FIG.
- step S 21 the reading unit 210 reads the TS of the video data recorded by the recording unit 100 from the storage unit 160 and sends it to the TS separation unit 220.
- the TS separation unit 220 determines whether “01” is set in the adaptation_field_control 33 (FIG. 3) of the TS header for each TS packet (step S22).
- step S22 when TS separator 220 determines that adaptation_field_control33 is set to “01” (step S22: Y), the PES packet inserted in the TS packet (FIGS. 5 and 6) is the first one. 1 Sends to the PTS extraction unit 240, and sends the compressed video data (ES) inserted in PES_packet_data_byte45 (FIG. 6) of the PES packet indicated by packet_start_code_prefix to the decoding unit 250 (step S23).
- ES compressed video data
- first PTS extraction section 240 extracts the PTS stored in PTS field 42 (FIG. 5) of the PES packet received from TS separation section 220 and sends it to display control section 260. Further, upon receiving the compressed video data (ES) from the TS separation unit 220, the decoding unit 250 decompresses the compressed video data and sends the decompressed decoded video data to the display control unit 260 (step S24 ).
- ES compressed video data
- step S22 If it is determined in step S22 that TS separation unit 220 force daptation_field_control33 is set to "01" (step S22: N), private_data_byte38 (Fig. 4) of the adaptation field of the TS packet is set.
- step S22: N If it is determined in step S22 that TS separation unit 220 force daptation_field_control33 is set to "01" (step S22: N), private_data_byte38 (Fig. 4) of the adaptation field of the TS packet is set.
- Read the packet start code of the uncompressed video data from the non_enc_start_code_prefix51 of the inserted Non_encode_packet (Fig. 7).
- the luminance signal and color difference signal of the compressed video data packet are sequentially sent to the display control unit 260.
- the data stored in Non_encode_packet is sent to the second PTS extraction unit 230 (step S 25).
- the second PTS extractor 230 extracts the PTS stored in the PTS field and sends it to the display controller 260 (step S26).
- the display control unit 260 is the PTS extracted by the first PTS extraction unit 240 in step S24 and the video data expanded by the decoding unit 250, or the uncompressed video data sent from the TS separation unit 220 in step S25.
- the luminance signal and the color difference signal and the PTS extracted by the second PTS extraction unit 230 in step S26 are received, each video data received at each timing indicated by the extracted PTS is displayed on a display or the like (step S26). S27).
- a TS in which uncompressed video data and post-compression video data are mixed is generated and temporarily stored in the storage unit 16. After recording all the time, only for example, multiple compressed recording processes are performed in parallel.
- the TS including the image data is read to compress the uncompressed video data, and the compressed video data is replaced with the uncompressed video data and recorded again.
- a mechanism for reading a recorded TS and sending uncompressed video data to the recording unit side is provided on the reproducing unit side described in the first embodiment.
- the mechanism may be provided on the recording unit side.
- re-recording instruction the instruction for the reading timing
- a microcomputer or the like outside the recording / reproducing apparatus.
- FIG. 11 is a functional configuration diagram of the recording / reproducing apparatus according to the present embodiment.
- the recording / reproducing apparatus includes a recording unit 101 and a reproducing unit 201.
- the playback unit 201 in the figure includes a header analysis unit 212 in addition to the configuration of the first embodiment described above.
- the reading unit 211 receives a re-recording instruction from a microcomputer (not shown), reads the TS indicated by the TS identifier instructed from the storage unit 160, and reads the read TS. It has a function of sending to the header analysis unit 212.
- the header analysis unit 212 receives the TS, and for each TS packet, according to the setting value of adaptation_field_control33 of the TS packet header, the function of sending the TS packet to the TS separation unit 221; It has a function of sending an instruction to accept video data to the switching unit 170 of the recording unit 101.
- the header analysis unit 212 sends information indicating a TS packet including uncompressed video data (hereinafter referred to as “uncompressed TS packet”) to the TS conversion unit 150 and converts the pre-compression TS packet to TS again. It has a function to send a re-recording instruction to replace the TS packet (hereinafter referred to as “re-TS packet”).
- the TS separation unit 221 receives the TS packet from the reading unit 211 or the header analysis unit 212, and the PTS assigned to the uncompressed video data and the uncompressed video data in the TS packet according to the transmission source of the TS packet. Is sent to the recording unit 101.
- the recording unit 101 in the figure includes a switching unit 170 in addition to the configuration of the first embodiment described above.
- Switching section 170 has a function of receiving an uncompressed digital video signal from the outside of the recording / reproducing apparatus. In addition, it has a function of receiving a pre-compression digital video signal from the playback unit 201. In addition, switching section 170 has a function of sending the uncompressed digital video signal received from playback section 201 to compression encoding section 111.
- the TS unit 150 When receiving the above-described re-recording instruction, the TS unit 150 has a function of replacing the pre-compression TS packet with a re-TS packet that has been TS packetized again and recording it in the storage unit 160. ⁇ Operation>
- FIG. 12 is an operation flowchart of the re-recording process of the recording / reproducing apparatus according to the present embodiment. Hereinafter, the re-recording process will be described with reference to FIG.
- step S31 when the reading unit 211 of the playback unit 201 receives a re-recording instruction (step S31: Y), the reading unit 211 stores in the storage unit 160 corresponding to the TS identifier instructed by the re-recording instruction.
- the TS packet is read according to the ATS and sent to the header analysis unit 212 (step S32).
- header analysis section 212 determines whether or not the set value of adaptaion_field_control33 of each TS packet is "10" (step S33).
- step S33 when the header analysis unit 212 determines that the set value of adaptaion_field_control33 is “10” (step S33: Y), the header analysis unit 212 receives the pre-compression digital video signal from the playback unit 201. An input switching instruction is sent to the switching unit 170 of the recording unit 101. Also, a TS packet in which adaptaion_field_control33 is set to “10” is sent to the TS separation unit 221 and information indicating the pre-compression TS packet and the pre-compression TS packet are replaced with a re-TS packet and recorded in the TS unit 150 A re-recording instruction is sent (step S34).
- the TS separation unit 221 accepts the TS packet sent in step S34, and from the non_enc_start_code_prefix51 of the Non_encode_packet (Fig. 7) inserted in the private_data_byte38 (Fig. 4) of the adaptation field of the TS bucket.
- the packet start code of the compressed video data is read, and the PTS of the Non_encode_packet is sequentially sent to the switching unit 170 together with the luminance signal and the color difference signal of the packet of the uncompressed video data (Step S35).
- Switching section 170 receives the luminance signal and color difference sent from TS separation section 221 in step S35.
- the uncompressed digital video signal is sent to the compression encoding unit 111.
- the compression encoding unit 111 is the same as in the first embodiment.
- the luminance signal and the color difference signal of the digital video signal before compression are compressed in units of frames, and the compressed video data and PTS are sent to the first PTS adding unit 130.
- the first PTS adding unit 130 receives the compressed video data and the PTS sent from the compression code unit 111, re-adds the received PTS to the compressed video data, and follows the definition of the PES packet in FIG. Generate a PES packet and send the PES packet to the TS unit 150.
- TS conversion section 150 sets adaptaion_field_control33 to "01”, stores the PES packet sent from first PTS adding section 130 in data_byte36 of the TS packet (Fig. 3), A re-TS packet is generated (step S36).
- step S36 the TS unit 150 replaces the pre-compression TS packet instructed in step S34 with the re-TS packet generated in step S36 and records it in the storage unit 160 (step S37).
- the TS including the uncompressed video data is temporarily stored in the recording medium.
- the data size of the uncompressed video data can be reduced to the data size of the compressed video data, and the recording medium can be used efficiently. can do.
- the uncompressed digital video signal received by the compression code unit 111 is compressed, and the compressed video data is decompressed by the local decoder 121 and the uncompressed digital video data.
- the difference between the compressed video data and the uncompressed video data is recorded before the compression by the compression code unit 110. You can judge the power to do! /.
- the compression unit 110 receives a predetermined number or more of compression recording requests, etc.
- the compression encoding unit 110 interrupts the compression process, and instructs the TS conversion unit 150 to select the uncompressed video data transmitted from the second PTS adding unit 140.
- the compression encoding unit 111 interrupts the compression process until the number of objects to be compressed reaches a predetermined number or less, and the TS conversion unit 150 selects the uncompressed video data from the second encoding unit 140 from the compression encoding unit 111.
- the uncompressed video data is acquired until the instruction is canceled, and the acquired uncompressed video data is recorded in the TS 160 as a TS packet.
- the TS conversion unit 150 determines whether the image quality of the compressed video data satisfies a certain image quality standard, depending on whether or not the image quality of the compressed video data satisfies a certain image quality standard.
- the force described as selecting any one of the video data of the first PTS is assigned depending on whether the output time interval of the compressed video data output by the compression code unit 111 exceeds a predetermined time such as 1Z30 seconds, for example.
- the video data may be selected from either the unit 130 or the second PTS adding unit 140.
- the compression code unit 111 cannot complete the compression processing in units of frames within a predetermined time, the compression processing capability decreases due to recording processing of other video content, and the compression processing is performed. It can be judged that the performance is bad.
- the TS unit 150 converts the predetermined amount of uncompressed video data sent from the second PTS adding unit 140 into the Private_data_byte field 38 (see FIG. Although described as being stored in 4), it may be stored using the PE S_private_data field 44 (Fig. 6) of the PES packet! / ⁇ .
- the storage unit 160 explained that the TS 160 is added and recorded when the TS packet is received, and the reception order and reception time interval of each TS packet together with each TS packet.
- the read time information shown may be stored.
- the recording / reproducing apparatus includes the recording unit and the reproducing unit, the recording unit records the video content converted to TS, and the reproducing unit reproduces the recorded TS.
- the TS is read and the recompression recording process is performed by the recording unit.
- the recording unit may be configured to perform TS reading and recompression recording processing for reproducing the TS.
- the compressed video data and the uncompressed video data are recorded according to the TS format of the MPEG-2 system.
- the compressed video data and the uncompressed video data are recorded. Any format other than the TS format may be used as long as the time information corresponding to each is added and the compressed video data can be distinguished from the uncompressed video data.
- the present invention may be a method including the steps described in the embodiments.
- the method may be a computer program for realizing the method using a computer system, or may be a digital signal representing the program! /.
- the present invention provides a computer-readable recording medium on which the program or the digital signal is recorded, for example, a flexible disk, a hard disk, a CD, an MO, a DV.
- D may be D, BD, semiconductor memory, or the like.
- the present invention may be the computer program or the digital signal transmitted via a telecommunication line, a wireless or wired communication line, or a network represented by the Internet.
- the program or the digital signal is recorded on the recording medium and transferred, or transferred via the network or the like, and is executed in another independent computer system. As well.
- the recording / reproducing apparatus can compress and record video content via a hard disk recorder or the like that records and reproduces a plurality of video contents in parallel, or a plurality of terminal-powered home networks. It can be used as a home server.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US11/914,510 US8238728B2 (en) | 2005-05-30 | 2006-05-25 | Recording/reproducing apparatus, recording medium and integrated circuit |
CN2006800191604A CN101185341B (zh) | 2005-05-30 | 2006-05-25 | 记录再现装置及集成电路 |
JP2007518935A JP4825202B2 (ja) | 2005-05-30 | 2006-05-25 | 記録再生装置、記録媒体、及び集積回路 |
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JP2005-156786 | 2005-05-30 | ||
JP2005156786 | 2005-05-30 |
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WO2006129546A1 true WO2006129546A1 (ja) | 2006-12-07 |
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PCT/JP2006/310438 WO2006129546A1 (ja) | 2005-05-30 | 2006-05-25 | 記録再生装置、記録媒体、及び集積回路 |
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US (1) | US8238728B2 (ja) |
JP (1) | JP4825202B2 (ja) |
CN (1) | CN101185341B (ja) |
WO (1) | WO2006129546A1 (ja) |
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US20090317049A1 (en) * | 2006-07-12 | 2009-12-24 | Katsumi Adachi | Recording/reproducing system, recording device, and reproduction device |
EP2062260A2 (en) * | 2006-08-25 | 2009-05-27 | Koninklijke Philips Electronics N.V. | Method and apparatus for generating a summary |
JP5265139B2 (ja) * | 2007-06-13 | 2013-08-14 | オリンパスメディカルシステムズ株式会社 | 体内画像取得システム |
CN111699530B (zh) * | 2018-09-20 | 2022-09-23 | 松下知识产权经营株式会社 | 记录装置及记录方法 |
GB2617048A (en) * | 2021-01-06 | 2023-09-27 | Canon Kk | Method and apparatus for encapsulating uncompressed images and uncompressed video data into a file |
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JPH09261237A (ja) * | 1996-03-22 | 1997-10-03 | Sony Corp | エンコーダ装置、デコーダ装置及び信号伝送方法 |
JP2003099308A (ja) * | 2001-09-25 | 2003-04-04 | Toshiba Corp | バックアップ装置およびデータバックアップ方法 |
JP2004194255A (ja) * | 2002-12-13 | 2004-07-08 | Canon Inc | 代行録画システム |
JP2005079815A (ja) * | 2003-08-29 | 2005-03-24 | Toshiba Corp | 画像情報のエンコード・デコード方法及びディスク装置 |
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US5033105A (en) * | 1987-08-11 | 1991-07-16 | Apple Computer | Video compression algorithm |
US6269215B1 (en) * | 1999-03-02 | 2001-07-31 | Hitachi, Ltd. | Information processing system |
US6792043B1 (en) * | 1998-10-23 | 2004-09-14 | Telecommunications Advancement Organization Of Japan | Method, apparatus and program products for retrieving moving image |
WO2001006780A1 (fr) * | 1999-07-16 | 2001-01-25 | Matsushita Electric Industrial Co., Ltd. | Disque optique, appareil d'enregistrement/reproduction de disque optique, et procede d'enregistrement/reproduction |
US7200859B1 (en) * | 2000-11-22 | 2007-04-03 | Digeo, Inc. | Apparatus and method for intelligent multimedia compression and distribution |
TW550952B (en) * | 2002-02-07 | 2003-09-01 | Ulead Systems Inc | Method for detecting scene change in compressed video data |
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2006
- 2006-05-25 US US11/914,510 patent/US8238728B2/en not_active Expired - Fee Related
- 2006-05-25 JP JP2007518935A patent/JP4825202B2/ja not_active Expired - Fee Related
- 2006-05-25 WO PCT/JP2006/310438 patent/WO2006129546A1/ja active Application Filing
- 2006-05-25 CN CN2006800191604A patent/CN101185341B/zh not_active Expired - Fee Related
Patent Citations (4)
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JPH09261237A (ja) * | 1996-03-22 | 1997-10-03 | Sony Corp | エンコーダ装置、デコーダ装置及び信号伝送方法 |
JP2003099308A (ja) * | 2001-09-25 | 2003-04-04 | Toshiba Corp | バックアップ装置およびデータバックアップ方法 |
JP2004194255A (ja) * | 2002-12-13 | 2004-07-08 | Canon Inc | 代行録画システム |
JP2005079815A (ja) * | 2003-08-29 | 2005-03-24 | Toshiba Corp | 画像情報のエンコード・デコード方法及びディスク装置 |
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CN101185341B (zh) | 2010-07-14 |
JP4825202B2 (ja) | 2011-11-30 |
US8238728B2 (en) | 2012-08-07 |
JPWO2006129546A1 (ja) | 2008-12-25 |
CN101185341A (zh) | 2008-05-21 |
US20090060463A1 (en) | 2009-03-05 |
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