EP0508762A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical disk ROM
Assignee: Panasonic Holdings Corp
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Filing: 1992-04-08
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Granted: —
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Expires: 2012-04-08
Abstract
Abstract An optical disk (K1) provided with a ROM area (21) for reproduction only, in which information (21) for reproduction only and first retrieval information (22) for retrieving the information (21) for reproduction only are recorded in embossed shape and a rewritable area (30) in which information (32) can be additionally recoded or rewritten, wherein on the basis of each of a plurality of additionally recording and rewriting logical specifications of respective appliances utilizing the optical disk (K1), the first retrieval information (22) is converted into second retrieval information (31), wherein the second retrieval information (31) corresponds to at least one of the appliances and is recorded in the rewritable area (30) together with third retrieval information (33) for the additionally recordable and rewritable information (32) so as to be additionally recordable or rewritable, and an apparatus (S) for recording and reproducing the optical disk (K1).
Inventors
- 👤 Yukinori Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 13:26
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/32; G11B27/327; G11B27/329; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G11B20/00; G11B20/10; G11B20/12; G11B20/1217; G11B2020/1087; G11B2020/10879; G11B2020/1259; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/211; G11B2220/213; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
An optical disk comprising a ROM area (20) and a writable area (30), the ROM area comprising a first region (21) containing data for reproduction and a second region (22) containing information governing the format for retrieval of data from the first region; characterised by a further region (31) provided in the writable area (30) and containing information governing the retrieval of data from the first region (21), the data in the further region (31) being converted from the data in the second region (22) in accordance with a reading/writing format corresponding to that of an apparatus which in use accesses the disk, so that in use data is read from the first region in the said format.
Claim 2
Dependent Claim
34 words
An optical disk according to claim 1, further comprising an additional region provided in the writable area and containing data governing the format in which data is written or read in the writable area.
Claim 3
Dependent Claim
26 words
An optical disk according to claim 1 or 2, in which a plurality of such further and additional regions are provided corresponding to different data formats.
Claim 4
Independent Claim
156 words
A method of operating a writable optical disk ROM system, the optical disk comprising a ROM area (20) and a writable area (30), the ROM area including a first region (21) containing data for reproduction and a second region (22) containing information governing the format for retrieval of data from the first region, the method including an initialization step in which information governing the retrieval of data from the first region (21) is read from the second region (22), the information is converted in accordance with a specified logical format for the reading of data, and the converted information is written to a further region provided in the writable area; and a reading step in which an apparatus accessing the optical disk reads data from the first region in the specified logical format, the physical track positions in the first region which are read being determined in accordance with the converted information in the further region.
Claim 5
Dependent Claim
133 words
An optical disk (K1) provided with a ROM area (21) for reproduction only, in which information (21) for reproduction only and first retrieval information (22) for retrieving the information (21) for reproduction only are recorded in embossed shape and a rewritable area (30) in which information (32) can be additionally recorded or rewritten, wherein on the basis of each of a plurality of additionally recording and rewriting logical specifications of responsive appliances utilizing the optical disk (K1), the first retrieval information (22) is converted onto second retrieval information (31), wherein the second retrieval information (31) corresponds to at least one of the appliances and is recorded in the rewritable area (30) together with third retrieval information (33) for the additionally recordable and rewritable information (32) so as to be additionally recordable or rewritable.
Claim 6
Independent Claim
131 words
An apparatus (S) for recording and reproducing an optical disk (K1), comprising: an optical disk drive (81) for driving the optical disk (81); and a controller (82-84) for controlling the optical disk drive (81); the optical disk (K1) being provided with a ROM area (20) for reproduction only, in which information (21) for reproduction only and retrieval information (22) for retrieving the information (21) for reproduction only are recorded in embossed shape and a rewritable area (30) in which information (32) can be additionally recorded or rewritten, wherein the retrieval information (22) in the ROM area (20) is recorded by the optical disk drive (81) in the rewritable area (30) on the basis of a logical specification for using the optical disk (K1) so as to be additionally recordable or rewritable.
References Cited (Backward Citations)
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