US4847697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproducing speed control system for a video disk player
Assignee: Pioneer Corp
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Filing: 1987-09-02
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Granted: 1989-07-11
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Expires: 2007-09-02
Abstract
Abstract An apparatus for controlling the reproducing speed for a video disk player in fine speed increments. Every time a vertical synchronizing pulse is delivered the number of tracks to be jumped is determined based on a base speed derived from the integer part of the ratio of an entered speed parameter and half a full scale of a counter. An additional track is jumped when the product of the number of vertical synchronizing pulses and the remainder portion of the above ratio exceeds the full scale of the counter.
Inventors
- 👤 Takao Tobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:08
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; Y; Y10; Y10S; Y10S358/00; Y10S358/907
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
A reproducing speed control system for a video disk player, comprising: means for jumping an information detection point across recording tracks of a video disk in synchronism with a vertical synchronizing pulse; a counter of a full scale of 2n, wherein n is an integer, for counting said vertical synchronizing pulse to thereby control a reproducing speed by using a jumping operation of said jumping means; means for entering an integer m to thereby set said reproducing speed at m/n; means for obtaining an integer portion of said reproducing speed to thereby set a base speed; means for calculating a number of tracks of said video disk to be jumped by said information detection point in synchronism with said vertical synchronizing pulse on a basis of said base speed; means for incrementing said counter in synchronism with said vertical synchronizing pulse; and means for adding unity to said calculated number of tracks each time said counter is counted up by a value of p, p being an integer portion of 2n/L, L being a remainder portion of m/n.
Claim 2
Dependent Claim
178 words
A reproducing speed control system for a video disk player, comprising: means for jumping an information detection point across recording tracks of a video disk in synchronism with a vertical synchronizing pulse; a counter of a full scale of 2n, wherein n is an integer, for counting said vertical synchronizing pulse to thereby control a reproducing speed by using a jumping operation of said jumping means; means for entering an integer m to thereby set said reproducing speed at m/n; means for obtaining an integer portion of said reproducing speed to thereby set a base speed; means for calculating a number of tracks of said video disk to be jumped by said information detection point in synchronism with said vertical synchronizing pulse on a basis of said base speed; means for incrementing said counter in synchronism with said vertical synchronizing pulse; and means for adding unity to said calculated number of tracks each time said counter is counted up by a value of p, p being an integer portion of 2n/L, L being a remainder portion of m/n.
Claim 3
Dependent Claim
86 words
A reproducing speed control system for a video disk player according to claim 1, wherein said adding means, in the case where p<n/2, adds unity to said calculated number of tracks to be jumped every time said counter is counted up by said value of p, while in the case where p≧n/2, said adding means adds unity to said number of tracks to be jumped every time said counter is counted up except the case when said counter is counted up by a value of (n-p).
Claim 4
Dependent Claim
161 words
A reproducing speed control method for a video disk player, comprising: jumping an information detection point across recording tracks of a video disk in synchronism with a vertical synchronizing pulse; counting up said vertical synchronizing pulse to a full scale of 2n, wherein n is an integer, to thereby control a reproducing speed by using said jumping operation; entering an integer m to thereby set said reproducing speed at m/n; obtaining an integer portion of said reproducing speed to thereby set a base speed; calculating a number of tracks of said video disk to be jumped by said information detection point in synchronism with said vertical synchronizing pulse on a basis of said base speed; incrementing said counting up in synchronism with said vertical synchronizing pulse; and adding unity to said calculating number of tracks each time said pulse is counted up by a value of p, p being an integer portion of 2n/L, L being a remainder portion of m/n.
Claim 5
Dependent Claim
161 words
A reproducing speed control method for a video disk player, comprising: jumping an information detection point across recording tracks of a video disk in synchronism with a vertical synchronizing pulse; counting up said vertical synchronizing pulse to a full scale of 2n, wherein n is an integer, to thereby control a reproducing speed by using said jumping operation; entering an integer m to thereby set said reproducing speed at m/n; obtaining an integer portion of said reproducing speed to thereby set a base speed; calculating a number of tracks of said video disk to be jumped by said information detection point in synchronism with said vertical synchronizing pulse on a basis of said base speed; incrementing said counting up in synchronism with said vertical synchronizing pulse; and adding unity to said calculating number of tracks each time said pulse is counted up by a value of p, p being an integer portion of 2n/L, L being a remainder portion of m/n.
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |