Patent US6925040B1 successfully refreshed from Google Patents.
US6925040B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording method, information recording medium and information recording apparatus
Assignee: Hitachi Consumer Electronics Co Ltd
•
Filing: 2000-10-25
•
Granted: 2005-08-02
•
Expires: 2020-10-25
Abstract
Abstract A recording medium which has a zone or zones storing lookup tables comprising an edge shift value of leading and trailing recording pulses.
Inventors
- 👤 Takeshi Maeda
- 👤 Hirofumi Sukeda
- 👤 Hiroyuki Minemura
- 👤 Hidehiko Kando
- 👤 Makoto Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:39
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/125; G11B7/126; G11B7/004; G11B7/0045; G11B7/00454; G11B7/00456; G11B7/006; G11B7/0062; G11B7/007; G11B7/00736
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are at least a leading edge of a first recording pulse and a trailing edge of a last recording pulse of a plurality of recording pulses.
Claim 2
Dependent Claim
139 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are at least a leading edge of a first recording pulse and a trailing edge of a last recording pulse of a plurality of recording pulses.
Claim 3
Dependent Claim
27 words
A recording medium according to claim 1 , wherein said edge shifting values are for the leading edge and a trailing edge of the first recording pulse.
Claim 4
Dependent Claim
42 words
A recording medium according to claim 1 , wherein said edge shifting values are for the leading edge of the first recording pulse and a leading edge and a trailing edge of the last recording pulse of the plurality of recording pulses.
Claim 5
Dependent Claim
36 words
A recording medium according to claim 1 , wherein said edge shifting values are for the leading and trailing edge of each of the first and the last recording pulse of a plurality of recording pulses.
Claim 6
Dependent Claim
33 words
A recording medium according to claim 1 , wherein said edge shifting values are for the leading edge and a trailing edge of the first recording pulse of the plurality of recording pulses.
Claim 7
Dependent Claim
41 words
A recording medium according to claim 1 , wherein said edge shifting values are for at least one of a leading and trailing edge of one recording pulse for recording a mark 3 Tw long, where Tw is a time width.
Claim 8
Dependent Claim
129 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are for a leading edge of a first recording pulse of a plurality of recording pulses.
Claim 9
Dependent Claim
129 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are for a leading edge of a first recording pulse of a plurality of recording pulses.
Claim 10
Dependent Claim
129 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are for a trailing edge of a last recording pulse of a plurality of recording pulses.
Claim 11
Dependent Claim
129 words
A recording medium comprising: a disk-shaped substrate; at least one track being provided on the disk-shaped substrate; a zone including said at least one track therein; wherein said zone stores a lookup table having information about edge shifting values of at least one of a leading and trailing edge of at least one recording pulse; wherein said edge shifting values are determined by combinations of a length M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark, and which can be positive and negative; and wherein said edge shifting values are for a trailing edge of a last recording pulse of a plurality of recording pulses.
Claim 12
Dependent Claim
33 words
A recording medium according to claim 8 , wherein said edge shifting values are for a leading edge and the trailing edge of the last recording pulse of the plurality of recording pulses.
References Cited (Backward Citations)
US4760526A
Cited
US5475657A
Cited
JPS62259229A
Cited
JPS6348617A
Cited
US4866692A
Cited
US4873680A
Cited
US5303217A
Cited
JPH03185629A
Cited
US5418770A
Cited
US5642343A
Cited
US5732061A
Cited
US5241524A
Cited
US5347505A
Cited
US5889745A
Cited
US5703855A
Cited
US5499227A
Cited
JPH08287465A
Cited
EP0797193A1
Cited
WO1997030440A2
Cited
US6226243B1
Cited
US6226672B1
Cited
US6310846B1
Cited
EP0933759A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-08-01 | 2009-01-31 | 2009-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-08-01 | 2013-01-31 | 2013-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-08-01 | 2017-01-31 | 2017-08-02 | $7700.00 | Window Closed / Lapsed |