Patent US5086421A successfully refreshed from Google Patents.
US5086421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk playing apparatus having a compensation characteristic variable with velocity information
Assignee: Pioneer Corp
•
Filing: 1990-09-21
•
Granted: 1992-02-04
•
Expires: 2010-09-21
Abstract
Abstract A disk playing apparatus having a compensating circuit for compensating phase and frequency characteristics of a read signal from a disk, wherein a compensation characteristic of the compensating circuit is varied according to a linear velocity. The disk playing apparatus includes means for reading information from the disk and means for outputting velocity information indicative of a reading speed from the disk by the reading means. The compensation characteristic is varied according to the velocity information. Accordingly, in the case of a CLV disk, a flat group delay characteristic is always obtained irrespective of changes in the linear velocity.
Inventors
- 👤 Kiyoshi Tateishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:26
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; G11B20/10046; G11B20/10212; G11B19/00; G11B19/20; G11B19/24; G11B20/14; G11B20/1403; G11B20/1423; G11B20/1426; G11B20/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A disk playing apparatus for playing a disk on which a digital signal treated by a predetermined modulation process is recorded, comprising: reading means for reading information recorded on said disk; velocity information outputting means for outputting velocity information indicating the speed of reading information from said disk by said reading means; and compensating means for compensating phase and frequency characteristics of a read signal obtained by said reading means, said compensating means having a compensation characteristic variable with said velocity information.
Claim 2
Dependent Claim
82 words
A disk playing apparatus for playing a disk on which a digital signal treated by a predetermined modulation process is recorded, comprising: reading means for reading information recorded on said disk; velocity information outputting means for outputting velocity information indicating the speed of reading information from said disk by said reading means; and compensating means for compensating phase and frequency characteristics of a read signal obtained by said reading means, said compensating means having a compensation characteristic variable with said velocity information.
Claim 3
Dependent Claim
39 words
The disk playing apparatus as defined in claim 1 further comprising designating means for designating a predetermined linear velocity, wherein said velocity information outputting means outputs said velocity information corresponding to said linear velocity designated by said designating means.
Claim 4
Dependent Claim
49 words
The disk playing apparatus as defined in claim 1 further comprising means for generating a reproduced clock synchronized with a clock component included in said read signal by said reading means, wherein said velocity information outputting means outputs said velocity information corresponding to a frequency of said reproduced clock.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |