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Recorder and coding device

A recording device and recording technology, applied in the direction of record carrier editing, data recording, record carrier type, etc., can solve problems such as inability to generate data streams, failure of inter-frame predictive coding processing, difficulty in managing audio and video data streams and video attributes, etc.

Inactive Publication Date: 2004-11-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0077] That is, due to the change of the video aspect ratio, it is difficult to manage the video properties of the recorded audio video data stream (encoded data)
Also, at the time of reproduction processing, decoding processing failure of encoded data occurs due to a change in video aspect ratio
Furthermore, it is not possible to perform high-speed access to the portion of the video data stream where the video aspect ratio changes
[0078] Using the MPEG encoding method, when the video aspect ratio changes, as in the case of the above-mentioned video resolution change, the data stream corresponding to the MPEG-2 standard cannot be generated, and the problem of inter-frame predictive encoding failure will occur.

Method used

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  • Recorder and coding device
  • Recorder and coding device
  • Recorder and coding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Fig. 1 is a block diagram illustrating a recording apparatus according to Embodiment 1 of the present invention.

[0131] The recording device 100 of the present embodiment 1 has: a broadcast receiver 102 that receives a digital broadcast signal Sbr and outputs an audio-visual data stream Sav; converts the audio-visual data stream Sav into data in a recording format according to a video standard format, and outputs VOB VOB builder 103 for data Dvob.

[0132]The broadcast receiver 102 has a TS / PS conversion function for converting a data stream in a transmission format (transport stream) into a data stream in a recording format (program stream), and the audio / video data stream Sav output from the broadcast receiver 102 forms program stream. Between the broadcast receiver 102 and the VOB builder 103, there is provided a packetization process for classifying the audio / video data stream Sav for each first data unit having a certain capacity (here, 2 Kbytes). Data (PCK dat...

Embodiment 2

[0150] Fig. 2 is a block diagram illustrating a recording apparatus according to Embodiment 2 of the present invention.

[0151] The recording device 100b of this embodiment 2 has: a packetizer 112, which replaces the packetizer (not shown in the figure) of the recording device 100a of the above-mentioned embodiment 1, while performing the above-mentioned packetization process, audio When the attribute or video attribute is changed, padded data is inserted in the packet being created immediately after the data stream before the attribute change so that the data stream before the attribute change and the data stream after the attribute change are not included in one packet The padding amount generator calculates the amount of the above-mentioned padding data according to the above-mentioned video attribute data Dva, audio attribute data Daa, and the internal signal Sop of the packetizer 112, and will represent the data (quantity data) Dps of the amount It is output to the packe...

Embodiment 3

[0168] Fig. 3 is a block diagram illustrating a recording apparatus according to Embodiment 3 of the present invention.

[0169] The recording device 100c of the third embodiment has: instead of the address information generator 108 and the VMG generator 110 in the recording device 100a of the first embodiment described above, video attribute data Dva and audio attribute data obtained from the attribute detectors 107 and 109 Daa, a VMG generator 110c that generates VMG information Dvmg that is VOB management information.

[0170] The above-mentioned recording device 100c has: a VOB builder 103c for generating VOB data instead of the VOB builder 103 in the above-mentioned recording device 100a, based on the above-mentioned video attribute data Dva and audio attribute data Daa. The data stream before the attribute change and the data stream after the attribute change are divided into respective VOB data.

[0171] Other configurations of the recording device 100c of the third em...

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Abstract

A recording apparatus comprises a detector 107 for detecting a video attribute, a detector 109 for detecting an audio attribute, and an address information generator 108 for generating specific address information Isa which indicates a data write address at the time when the video attribute or the audio attribute changes, on the basis of the outputs from the detectors 107 and 109. The specific address information Isa is written in a recording area of an optical disk 106, which area corresponds to VMGI 10b1 constituting management information (VMG information) 10a for each VOB. Therefore, when playing an audio video stream recorded on the optical disk 106, quick access can be made to the recording position in the stream where the attribute change occurs.

Description

technical field [0001] The present invention relates to a recording device and a coding device, in particular to a device for recording audio and video signals on a recording medium and a device for encoding video signals. Background technique [0002] On a playback-only DVD (Digital Video Disk), encoded data obtained by compressing and encoding the audio-visual signal is recorded as an audio-visual signal corresponding to a predetermined program or the like. The audio-video signal includes an audio signal and a video signal, and audio coded data obtained by coding an audio signal and video coded data obtained by coding a video signal are recorded as the coded data on the DVD. Furthermore, encoded audio data and encoded video data are packaged separately. That is, these coded data are divided into first data units according to a predetermined data size (for example, 2048 bytes). [0003] Hereinafter, the encoded audio data corresponding to the first data unit is referred t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/10G11B27/034G11B27/30G11B27/32H04N5/85H04N9/804H04N9/806
CPCH04N5/85H04N5/91G11B27/329H04N9/8063G11B2220/2562G11B27/3027H04N9/8042G11B27/034G11B20/10
Inventor 福田秀树近藤敏志
Owner PANASONIC CORP