Data recording method, data editing method, data decoding method, and apparatus and recording medium therefor
Inactive Publication Date: 2008-03-13
SHARP KK
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
[0013] The present invention has been devised in view of the above problems, it is therefore an object of the present invention to provide a data recording method, a data editing method and a data decoding method as well as a data recorder and a data decoder, which, by a simple configuration, can prevent reproduction noise upon reproduction of an AV stream which is formed of joined AV streams.
Problems solved by technology
However, there are some cases where the source material needs to be directly edited.
However, there is a concern that some reproduction noise might occur at the seam when a video data encoding scheme based on the MPEG video standard (ISO / IEC11172-2 or ISO / IEC13818-2) is adopted.
The risk of reproduction noise when some pieces of video data are joined can be attributed to the possibility of the VBV buffer causing overflow or underflow at a point of the seam.
The reason why an event of this kind happens is that there is a possibility that the conformity of the buffer occupancy is lost.
However, this method needs a special decoder, resulting in cost disadvantage.
However, in this case, there is a concern of occurrence of image degradation due to the re-coding process.
Further this method needs to implement coding and decoding successively or in parallel, entailing the problem in that the apparatus becomes more complicated.
Method used
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embodiment 1
[0087] One embodiment of the present invention will be described with reference to FIGS. 13 to 21.
[0088] The structure of an AV stream in the present invention will be described with reference to FIGS. 13 and 14. An AV stream is composed of an integer number of Record Units (RUs). A RU is a unit to be recorded continuously on the disk. The lengths of RUs are set up so as to guarantee seamless playback (the picture and sound during playback can be reproduced without a break) regardless of how the RUs that constitute the AV stream are allocated on the disk. This setup will be described later.
[0089] Further, the stream is constructed so that RU boundaries correspond to ECC block boundaries. Owing to these RU features, the arrangement of an AV stream after it has been recorded on the disk can be easily changed by the RU units while seamless playback is guaranteed.
[0090] A RU is composed of an integer number of Video Units (VUs). A VU is a unit that is reproducible by itself. Therefor...
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A system records an AV stream composed of a plurality of record units (RUs) containing independently reproducible video units (VUs) of at least video or audio and program information (Movie atom) managing the AV stream, onto a recording medium. The program information contains a piece of information (Edit list atom) that manages a point of junction between the record units or between AV streams. In decoding the AV stream, decoding is halted or decoders are switched at the point of junction, based on the management information on the points of junction, for example.
Description
TECHNICAL FIELD [0001] The present invention relates to a data recording method, a data editing method and a data decoding method and an apparatus therefor, for recording and reproducing data such as video data and audio data to and from a random-accessible recording medium such as a hard disk, optical disk, etc. BACKGROUND ART [0002] Digital recording and reproducing apparatuses for video and audio using disk media have been coming into wide use. One of the featured functions of disk media, distinct from tape media, is the function of non-destructive editing, or also called the function of non-linear editing. This function is to provide the capability of reproducing any sections of AV streams in a desired order without actual movement or copy of the AV streams recorded on the disk, and this function is achieved by creating information (playback management information) that indicates the start and end of every section to be reproduced in AV streams and their order of reproduction an...
Claims
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Login to View More IPC IPC(8): H04N5/91G11B20/10G11B27/034G11B27/32H04N5/781H04N5/85H04N5/93H04N9/804H04N19/00H04N21/234H04N21/426H04N21/433H04N21/44H04N21/472H04N21/482
CPCG11B20/10H04N19/44G11B20/1251G11B27/034G11B27/105G11B27/322G11B27/329G11B2020/10537G11B2020/1062G11B2020/10805G11B2020/10814G11B2220/20G11B2220/2545H04N5/781H04N5/85H04N9/8042H04N21/23406H04N21/42646H04N21/4334H04N21/44H04N21/44004H04N21/47205H04N21/4825H04N19/152G11B20/10527
InventorKIYAMA, JIROIWANO, YURIYAMAGUCHI, TAKAYOSHI
OwnerSHARP KK