Data recording method and apparatus, data recording medium, and data reproducing method and apparatus
AssigneeSony Corporation
InventorsMakoto Kawamura, Yasushi Fujinami
Life of this patent
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Abstract
The present invention provides remarkably improved availability in a data recording method and apparatus, a data recording medium, and a data reproducing method and apparatus. By recording additional information for data reproduction in each sector on a data reproducing medium as a subcode separately from data when the data is recorded in the unit of sector, reproduction of data can be controlled using the subcode, thus making it possible to remarkably improve the availability of the data recording medium.
Claims8
A data recording method comprising the steps of:
- recording user data which includes data representative of a plurality of still pictures including a number of intra-frame (I) pictures, predictively coded (P) pictures, and bidirectionally coded (B) pictures onto a data recording medium in sector units each having a number of packets, in which each packet includes a packet header and respective data;
- and
- recording subcode information for data reproduction in each of said sectors separately from said user data, in which said subcode information includes a sector number for identifying a respective sector and one other item selected from a set including a predetermined time code, entry point information indicative of a position or positions at which the data representative of only an I picture or pictures is located for use in a high-speed search operation and temporal reference information which indicates an order for displaying the pictures and which enables access to a desired still picture selected by a user from among the plurality of still pictures.
A data recording apparatus for recording data on a data recording medium in the unit of sector, comprising:
- generating means for generating user data which includes data representative of a plurality of still pictures including a number of intra-frame (I) pictures, predictively coded (P) pictures, and bidirectionally coded (B) pictures;
- subcode generating means for generating a subcode as additional information for data reproduction separately from said user data to be recorded on said each sector, in which said subcode includes a sector number for identifying a respective sector and one other item selected from a set including a predetermined time code, entry point information indicative of a position or positions at which the data representative of only an I picture or pictures is located for use in a high-speed search operation and temporal reference information which indicates an order for displaying the pictures and which enables access to a desired still picture selected by a user from among the plurality of still pictures;
- and
- subcode adding means for recording said user data and said subcode in said each sector.
Dependencies are inferred from the claim text.