Recording apparatus and coding apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideki Fukuda, Satoshi Kondo
Life of this patent
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Abstract
A recording apparatus includes a detector for detecting a video attribute, a detector for detecting an audio attribute, and an address information generator for generating specific address information which indicates a data write address at the time when the video attribute of the audio attribute changes, on the basis of the outputs from the detectors. The specific address information is written in a recording area of an optical disk, which area corresponds to VMGI constituting management information (VMG information) for each VOB. Therefore, when playing an audio video stream recorded on the optical disk, quick access can be made to the recording position in the stream where the attribute change occurs.
Claims18
A recording apparatus for recording, on a recording medium, an audio video stream which is obtained by coding an audio video signal including an audio signal and a video signal, said apparatus comprising:
- a packing unit operable to perform packing to divide the audio video stream into plural streams corresponding to packs each having a predetermined size, and operable to output the audio video stream corresponding to each pack as pack data, said packs being data units for use in managing a recording position of the audio video stream on the recording medium;
- a recorder operable to record each pack data on the recording medium, as an access unit to the recording medium;
- and
- an attribute detector operable to detect an attribute relating to at least one of the video signal and the audio signal, and output attribute data indicating the attribute;
- and
- wherein, for each of said packs, said packing unit performs the packing such that a position in the audio video stream, where the attribute changes, is positioned at a head of the pack.
A recording apparatus for recording, on a recording medium, an audio video stream which is obtained by coding an audio video signal including an audio signal and a video signal, said apparatus comprising:
- a video object composer operable to divide the audio video stream into plural streams corresponding to management units for use in managing the audio video stream, and operable to output the stream corresponding to each management unit as video object data;
- a recorder operable to record management information for use in managing each video object data on the recording medium;
- and
- an attribute detector operable to detect a video resolution or an aspect ratio of the video signal as an attribute relating to the video signal on the basis of the audio video stream, and operable to output attribute data indicating the video resolution or the aspect ratio;
- wherein when the attribute changes, said video object composer divides the audio video stream, on the basis of the attribute data, such that a portion of the audio video stream before the attribute change point and a portion of the audio video stream after the attribute change point are output as different video object data.
A coding apparatus for coding a video signal, comprising:
- a video encoder operable to subject the video signal to intra-frame or inter-frame coding such that a frame group including at least one frame subjected to the inter-frame coding is generated, and a video stream corresponding to the frame group is output as a stream unit that can be accessed randomly;
- and
- a video attribute detector operable to detect a video resolution or an aspect ratio of the video signal as a video attribute of the video signal on the basis of the video signal, and operable to output video attribute data indicating the video attribute;
- and
- wherein said video encoder forms the frame group such that a specific frame, whose video attribute is different from that of a frame positioned just before it, is stored as a head frame in the frame group.
Dependencies are inferred from the claim text.