US5455814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recording method
Assignee: Sony Corp
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Filing: 1994-01-21
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Granted: 1995-10-03
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Expires: 2014-01-21
Abstract
Abstract A data recording method by which data of a compact disk can be recorded well onto a magneto-optic disk of the ISO format. Data of a compact disk are recorded onto a 5-inch magneto-optic disk (ISO format) of the 512 bytes/sector type of the CS system. The sector size of the magneto-optic disk is 610 bytes. Data included in one sector (98 frames) of the compact disk are 2,352 bytes and subcodings of P to W are 96 bytes. Data for one sector are divided into data groups A to H to construct a data format. A CRC is added to each data group. Further, a parity 2 (Reed-Solomon code) is added. Data (3,050 bytes) for one sector of the compact disk to which the CRCs, parities and so forth are added are recorded across 5 sectors of the magneto-optic disk. Data of a compact disk can be recorded onto a magneto-optic disk having a different sector size, and since error correction codes or error detection codes are added using the remaining area, the data can be recorded with a high degree of accuracy.
Inventors
- 👤 Yoichiro Sako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:47
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1833; G11B20/12; G11B20/1262; G11B20/1217; G11B2020/1087; G11B2020/10879; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545; G11B27/00; G11B27/02; G11B27/031; G11B27/034
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
190 words
A method of recording, onto a preformatted disk shaped magneto-optic record medium having a sector size A, digital data formatted in a different sector size B, comprising the steps of: detecting digital data formatted into m sectors having a sector size B, where m is an integral number of at least 1; reformatting m sectors of digital data having a sector size B into n sectors of digital data having a sector size A, where n is an integral number of at least 1 and where the product of n and A is greater than the product of m and B; adding to the reformatted digital data at least one of an error correction code and an error detection code, the selected code for each A sized sector positioned within a region of the A sized sector corresponding to the difference of the product of n and A and the product of m and B; and recording the reformatted digital data and the selected code onto the n sectors of the preformatted disk shaped magneto-optic record medium, the preformatted record medium having at least one preformatted address within each sector.
Claim 2
Independent Claim
190 words
A method of recording, onto a preformatted disk shaped magneto-optic record medium having a sector size A, digital data formatted in a different sector size B, comprising the steps of: detecting digital data formatted into m sectors having a sector size B, where m is an integral number of at least 1; reformatting m sectors of digital data having a sector size B into n sectors of digital data having a sector size A, where n is an integral number of at least 1 and where the product of n and A is greater than the product of m and B; adding to the reformatted digital data at least one of an error correction code and an error detection code, the selected code for each A sized sector positioned within a region of the A sized sector corresponding to the difference of the product of n and A and the product of m and B; and recording the reformatted digital data and the selected code onto the n sectors of the preformatted disk shaped magneto-optic record medium, the preformatted record medium having at least one preformatted address within each sector.
Claim 3
Dependent Claim
40 words
A method of recording according to claim 1, wherein user digital data is reformatted from m sectors of digital data having a sector size B into units of 512 bytes within each of the n sectors having sector size A.
Claim 4
Dependent Claim
26 words
A method of recording according to claim 2, wherein digital data is detected from 98 frames within each of the m sectors having sector size B.
Claim 5
Dependent Claim
53 words
A method of recording according to claim 3, further comprising the steps of: dividing digital data within the 98 frames into a plurality of digital data groups; and adding at least one of the error correction code and the error detection code to the digital data within each of the digital data groups.
Claim 6
Dependent Claim
29 words
A method of recording according to claim 4, further comprising the step of: separating digital data belonging to an odd-numbered channel from digital data belonging to an even-numbered channel.
Claim 7
Dependent Claim
47 words
A method of recording according to claim 5, wherein the plurality of data groups are divided into at least one odd-numbered digital data group and at least one even-numbered digital data group, and at least one parity for error correction is added between adjacent digital data groups.
Claim 8
Independent Claim
189 words
A method of recording, onto a preformatted disk shaped magneto-optic record medium having a sector size A, digital data formatted in a different sector size B, comprising the steps of: detecting digital data from m sectors having a sector size B, where m is an integral number of at least 1; dividing digital data for each of the m sectors into a plurality of digital data groups, the digital data groups consisting of n sectors having a sector size A, where n is an integral number of at least 1 and where the product of n and A is greater than the product of m and B; adding to each digital data group at least an error detection code, the error detection code positioned within a region of the A sized sector corresponding to the difference between the product of n and A and the product of m and B; and recording each digital data group and its associated error detection code onto n sectors of the preformatted disk shaped magneto-optic record medium, the preformatted disk shaped magneto-optic record medium having at least one preformatted address within each sector.
Claim 9
Independent Claim
189 words
A method of recording, onto a preformatted disk shaped magneto-optic record medium having a sector size A, digital data formatted in a different sector size B, comprising the steps of: detecting digital data from m sectors having a sector size B, where m is an integral number of at least 1; dividing digital data for each of the m sectors into a plurality of digital data groups, the digital data groups consisting of n sectors having a sector size A, where n is an integral number of at least 1 and where the product of n and A is greater than the product of m and B; adding to each digital data group at least an error detection code, the error detection code positioned within a region of the A sized sector corresponding to the difference between the product of n and A and the product of m and B; and recording each digital data group and its associated error detection code onto n sectors of the preformatted disk shaped magneto-optic record medium, the preformatted disk shaped magneto-optic record medium having at least one preformatted address within each sector.
Claim 10
Dependent Claim
29 words
A method of recording according to claim 7, further comprising the step of: separating digital data belonging to an odd-numbered channel from digital data belonging to an even-numbered channel.
Claim 11
Dependent Claim
48 words
A method of recording according to claim 7, wherein the plurality of digital data groups are divided into at least one odd-numbered digital data group and at least one even-numbered digital data group, and at least one parity for error correction is added between adjacent digital data groups.
Claim 12
Dependent Claim
21 words
A method of recording according to claim 4, further comprising the step of: separating odd-numbered digital data from even-numbered digital data.
Claim 13
Dependent Claim
21 words
A method of recording according to claim 7, further comprising the step of: separating odd-numbered digital data from even-numbered digital data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-02 | 1999-04-03 | 1999-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-02 | 2003-04-03 | 2003-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-02 | 2007-04-03 | 2007-10-03 | $7700.00 | Window Closed / Lapsed |