Information recording medium, information recording/reproduction system apparatus, and information recording/reproduction method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshiho Gotoh, Kaoru Murase, Yoshihisa Fukushima, Tomoyuki Okada
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Abstract
An information recording medium of the present invention is an information recording medium in which data is recorded by using a data structure, the data structure including a file structure area and a data area. The data includes first AV data having a first attribute and second AV data having a second attribute which is different from the first attribute. The data area has continuous areas. At least one of the continuous areas includes a first extent in which at least a portion of the first AV data is recorded and a second extent in which at least a portion of the second AV data is recorded.
Claims6
A data editing method using an information recording medium in which data is recorded, wherein:
- the data includes AV data which is recorded/reproduced by blocks of sectors and includes a plurality of AV data portions, the AV data portions each corresponding to one of the sectors and having time information;
- and
- the data area includes first and second continuous areas, each of the first area and the second area including a plurality of the sectors for recording a plurality of the AV data portions, the data editing method comprising:
- a first step of reading out a leading sector and a last sector of each of the continuous areas so as to obtain first time information corresponding to the leading sector and second time information corresponding to the last sector;
- a second step of reading out an edition point sector corresponding to a predetermined edition point so as to obtain third time information corresponding to the edition point sector;
- and
- a third step of determining whether or not the AV data is continuously reproducible based on a size of the first and second continuous areas, the first time information, the second time information, and the third time information.
An information recording system apparatus for editing data by using an information recording medium in which the data is recorded by using a data structure, the data structure including a file structure area and a data area, wherein:
- the data includes AV data which is recorded/reproduced by blocks of sectors and includes a plurality of AV data portions, the AV data portions each corresponding to one of the sectors and having time information;
- the data area includes a first extent and a second extent, each of the first extent and the second extent including a plurality of the sectors for recording a plurality of the AV data portions;
- and
- the file structure area includes an allocation information area in which a first allocation descriptor and a second allocation descriptor are recorded, the first allocation descriptor and the second allocation descriptor respectively representing locations of the first extent and the second extent, the information recording system apparatus comprising:
- an AV file structure processing section for reading out the first allocation descriptor and the second allocation descriptor from the allocation information area so as to obtain location information of the first extent and the second extent;
- and
- an AV allocation structure processing section for reading out a leading sector and a last sector of each extent so as to obtain first time information corresponding to the leading sector and second time information corresponding to the last sector, wherein:
- the AV allocation structure processing section reads out an edition point sector corresponding to a predetermined edition point so as to obtain third time information corresponding to the edition point sector;
- and
- the AV allocation structure processing section determines whether or not the AV data is continuously reproducible based on the first allocation descriptor, the second allocation descriptor, the first time information, the second time information, and the third time information.
Dependencies are inferred from the claim text.