Patent US5257248A successfully refreshed from Google Patents.
US5257248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording apparatus capable of efficiently verifying recording information
Assignee: Canon Inc
•
Filing: 1990-03-26
•
Granted: 1993-10-26
•
Expires: 2010-03-26
Abstract
Abstract An apparatus for recording information on a disk-shaped medium with an appropriate amount of information, and allowing immediate verifying of the recorded information. The apparatus includes a unit for recording information of a recording unit on a recording medium, a verifying unit for verifying the recorded information, adapted, after recording the information of the recording unit, to effect a track jump from the last sector of the recording unit to a first sector; and a unit for selecting the number of sectors in the recording unit in such a manner that the position after the track jump from the last second of a recording unit is in front of the first sector by a predetermined number of sectors.
Inventors
- 👤 Yutaka Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:36
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B19/00; G11B19/02; G11B20/18; G11B20/1833; G11B20/1879; G11B7/00; G11B7/004; G11B7/0045; G11B20/12; G11B20/1217; G11B20/1258
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
An information recording apparatus for recording information on a recording medium having plural tracks, each of which contains plural sectors, said apparatus comprising: recording means for recording, on the recording medium, information on a basis of a data unit having a capacity corresponding to a predetermined number of sectors; verifying means for verifying the information recorded by said recording means after the recording of the unit of information; track jump means for performing a track jump in order for said verifying means to verify the recorded information; and control means for determining the predetermined number of sectors of the unit so as to minimize a number of sectors between a sector to which the track jump is performed and a first sector in which the information of the unit is recorded, except for a number of sectors which are required to prepare for verifying the recorded information.
Claim 2
Dependent Claim
147 words
An information recording apparatus for recording information on a recording medium having plural tracks, each of which contains plural sectors, said apparatus comprising: recording means for recording, on the recording medium, information on a basis of a data unit having a capacity corresponding to a predetermined number of sectors; verifying means for verifying the information recorded by said recording means after the recording of the unit of information; track jump means for performing a track jump in order for said verifying means to verify the recorded information; and control means for determining the predetermined number of sectors of the unit so as to minimize a number of sectors between a sector to which the track jump is performed and a first sector in which the information of the unit is recorded, except for a number of sectors which are required to prepare for verifying the recorded information.
Claim 3
Dependent Claim
29 words
An apparatus according to claim 1, wherein said control means determines the predetermined number of sectors of the unit according to a number of sectors included in a track.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 2, wherein said control means determines the predetermined number sectors of the unit according to a number of sectors rotating in a period required for the jump of a track.
Claim 5
Dependent Claim
51 words
An apparatus according to claim 1, wherein said recording means records information on the recording medium, in which the plural tracks are divided into plural zones, the number of sectors per track is increased toward the outer zones and the number of sectors in a unit is different in different zones.
Claim 6
Dependent Claim
166 words
An information recording apparatus for recording information on a recording medium having plural tracks, each of which contains plural sectors, said apparatus comprising: recording means for recording, on the recording medium, information on a basis of a data unit having a capacity corresponding to a predetermined number of sectors, including means for modulating the information of the unit for recording in each sector; verifying means for verifying in a verifying operation the information recorded by said recording means after recording of the unit of information; track jump means for performing a track jump in order for said verifying means to verify the recorded information; and control means for interrupting the verifying operation by said verifying means leaving a predetermined number of unverified sectors of the unit recorded by said recording means, and for conducting the verifying operation of the predetermined number of unverified sectors, after the recording of information of a next unit and before the verifying operation of the recorded information of the next unit.
Claim 7
Dependent Claim
166 words
An information recording apparatus for recording information on a recording medium having plural tracks, each of which contains plural sectors, said apparatus comprising: recording means for recording, on the recording medium, information on a basis of a data unit having a capacity corresponding to a predetermined number of sectors, including means for modulating the information of the unit for recording in each sector; verifying means for verifying in a verifying operation the information recorded by said recording means after recording of the unit of information; track jump means for performing a track jump in order for said verifying means to verify the recorded information; and control means for interrupting the verifying operation by said verifying means leaving a predetermined number of unverified sectors of the unit recorded by said recording means, and for conducting the verifying operation of the predetermined number of unverified sectors, after the recording of information of a next unit and before the verifying operation of the recorded information of the next unit.
Claim 8
Dependent Claim
46 words
An apparatus according to claim 5, wherein said control means comprises means for determining the position for interrupting the verifying operation, depending on the number of sectors rotating in the period required for modulating, by said modulating means, the information to be recorded in one sector.
Claim 9
Dependent Claim
40 words
An apparatus according to claim 6, wherein said control means comprises means for determining a position for interrupting the verifying operation, depending on the number of sectors rotating in the period required for verifying the information recorded in one sector.
Claim 10
Dependent Claim
24 words
An apparatus according to claim 5, wherein said modulating means comprise means for adding an error correcting code to the information of the unit.
References Cited (Backward Citations)
US4611314A
Cited
JPS59167874A
Cited
US4984227A
Cited
US4918677A
Cited
US4760566A
Cited
US4896311A
Cited
US4920528A
Cited
US5034914A
Cited
US4870634A
Cited
US4835757A
Cited
US4872154A
Cited
US4949326A
Cited
US4873679A
Cited
US4998009A
Cited
US4964094A
Cited
US4982074A
Cited
US5124851A
Cited
US5142514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |