Patent US4690239A successfully refreshed from Google Patents.
EP0258043A2
Expired / Lapsed
EP
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Information record medium having a header having error correction code added for each block and a method for recording information on such a medium
Assignee: Canon Inc
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Filing: 1987-08-25
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Granted: —
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Expires: 2007-08-25
Abstract
Abstract The information record medium having information recorded in a plurality of blocks, wherein each of said blocks has a data field and a header field including information with regard to the block per se, the header field having an error correction code added thereto. The method for recording information comprising the steps of: dividing data into a plurality of blocks per a predetermined information unit; adding to each of the divided data blocks a header field including information concerning the block per se; converting the header fields to information with error correction codes; checking whether addition of an error correction code to the data block is required or not for each data block, and if required, converting the data to information with the error correction code; and writing the data having the header fields added thereto onto an information record medium for each block.
Inventors
- 👤 Wataru Sakagami
- 👤 Yutaka Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:10
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1833; G11B20/12; G11B20/1215
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
44 words
An information record medium having information recorded in a plurality of blocks, wherein each of said blocks has a data field and a header field including information with regard to the block per se, the header field having an error correction code added thereto.
Claim 2
Dependent Claim
44 words
An information record medium having information recorded in a plurality of blocks, wherein each of said blocks has a data field and a header field including information with regard to the block per se, the header field having an error correction code added thereto.
Claim 3
Dependent Claim
28 words
An information record medium according to Claim 1, wherein said header field includes information indicating whether the data field has an error correction code added thereto or not.
Claim 4
Dependent Claim
16 words
An information record medium according to Claim 1, wherein said header field includes block address information.
Claim 5
Dependent Claim
27 words
An information record medium according to Claim 1, wherein said medium is of card shape are said blocks comprises a tracks formed in parallel on said card.
Claim 6
Dependent Claim
22 words
An information record medium according to Claim 4, wherein said header fields are provided at the both opposite ends of said tracks.
Claim 7
Independent Claim
100 words
A method for recording information comprising the steps of: dividing data into a plurality of blocks per a predetermined information unit; adding to each of the divided data blocks a header field including information concerning the block per se; converting the header fields to information with error correction codes; checking whether addition of an error correction code to the data block is required or not for each data block, and if required, converting the data to information with the error correction code; and writing the data having the header fields added thereto onto an information record medium for each block.
Claim 8
Independent Claim
100 words
A method for recording information comprising the steps of: dividing data into a plurality of blocks per a predetermined information unit; adding to each of the divided data blocks a header field including information concerning the block per se; converting the header fields to information with error correction codes; checking whether addition of an error correction code to the data block is required or not for each data block, and if required, converting the data to information with the error correction code; and writing the data having the header fields added thereto onto an information record medium for each block.
Claim 9
Dependent Claim
30 words
A method for recording information according to Claim 6, wherein said header field includes information for indicating whether the data field has the error correction code added thereto or not.
Claim 10
Dependent Claim
16 words
A method for recording information according to Claim 6, wherein said header includes block address information.
Claim 11
Dependent Claim
45 words
An information record bearing a plurality of blocks of information, each block including a block identification field, a data field and a field containing error correction data relating to the content of the block identification field, but not to the content of the data field.
Claim 12
Dependent Claim
45 words
An information record bearing a plurality of blocks of information, each block including a block identification field, a data field and a field containing error correction data relating to the content of the block identification field, but not to the content of the data field.
Claim 13
Dependent Claim
57 words
An information record bearing a plurality of blocks of information, each block including a block identification field, a data field, a field containing error correction data relating to the content of the block identification field, and a field indicating whether the block includes a field containing error correction data relating to the content of the data field.
Claim 14
Dependent Claim
57 words
An information record bearing a plurality of blocks of information, each block including a block identification field, a data field, a field containing error correction data relating to the content of the block identification field, and a field indicating whether the block includes a field containing error correction data relating to the content of the data field.
References Cited (Backward Citations)
No citation records indexed.
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