US5319626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for rewriting defect management areas on optical disk according to ECMA standard
Assignee: Teac Corp
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Filing: 1991-08-26
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Granted: 1994-06-07
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Expires: 2011-08-26
Abstract
Abstract A method for rewriting four defect management areas on an optical disk according to an ECMA standard is performed by means of deleting an old data which has been recorded on the respective defect management areas and then sequentially writing down a new data on respective defect management areas.
Inventors
- 👤 Minoru Ozaki
- 👤 Kyosuke Yoshimoto
- 👤 Hiroyuki Onda
- 👤 Koji Yamana
- 👤 Takuya Nagata
- 👤 Hidehiko Murata
- 👤 Yutaka Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1883; G11B19/00; G11B19/02; G11B19/04; G11B7/00; G11B7/002; G11B7/0037; G11B2220/00; G11B2220/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
225 words
A method of rewriting defective sector data in each of first through fourth defect management areas of an optical disk by means of an optical head when a defective sector is detected in the optical disk, said method comprising the steps of: storing first data in a first region of a memory device, said first data having been written to each of the first through fourth defect management areas of the optical disk, and the data of the four defect management areas being identical; storing second data in a second region of the memory device when a defective sector is detected in the optical disk, said second data including defective sector data indicating a position of said defective sector in the optical disk; generating third data in the memory device based on said first data in the first region of the memory device and based on said second data in the second region thereof; deleting said first data of all of the four defect management areas of the optical disk by means of the optical head; and writing said third data, generated in the memory device, to all of the first through fourth defect management areas of the optical disk by means of the optical head after said deletion of said first data of all of the four defect management areas of the optical disk.
Claim 2
Independent Claim
225 words
A method of rewriting defective sector data in each of first through fourth defect management areas of an optical disk by means of an optical head when a defective sector is detected in the optical disk, said method comprising the steps of: storing first data in a first region of a memory device, said first data having been written to each of the first through fourth defect management areas of the optical disk, and the data of the four defect management areas being identical; storing second data in a second region of the memory device when a defective sector is detected in the optical disk, said second data including defective sector data indicating a position of said defective sector in the optical disk; generating third data in the memory device based on said first data in the first region of the memory device and based on said second data in the second region thereof; deleting said first data of all of the four defect management areas of the optical disk by means of the optical head; and writing said third data, generated in the memory device, to all of the first through fourth defect management areas of the optical disk by means of the optical head after said deletion of said first data of all of the four defect management areas of the optical disk.
Claim 3
Dependent Claim
56 words
A method according to claim 1, wherein in said step of writing the third data to all of the first through fourth defect management areas by means of the optical head, the third data is first written to the defect management area nearest the optical head among the four defect management areas of the optical disk.
Claim 4
Dependent Claim
61 words
A method according to claim 1, wherein said method further comprises a step of verifying the presence of a defective sector on the optical disk by means of the optical head to generate a data on a position of the defective sector as the second data, after the step of storing first data in a first region of the memory device.
Claim 5
Dependent Claim
55 words
A method according to claim 1, wherein said method further comprises a step of generating a data concerning a rewritable zone of the optical disk and an embossed zone of the optical disk to be changed to the second data, after the step of storing first data in the first region of the memory device.
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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) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |