US4949322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random-play control system in disk player
Assignee: Pioneer Corp
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Filing: 1988-06-15
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Granted: 1990-08-14
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Expires: 2008-06-15
Abstract
Abstract In a disk player, upon the lock-in of the focus servo at the turn-on of the main power source, the information recorded on an information recording disk is read and the sub-code information such as frame numbers, time code, or the like which are obtained from the read output are set to fundamental information for generation of random numbers in the random play mode, so that the initial value for the random numbers is set at random. The programs can be played in accordance with the different sequences even for the same disk. A preferable random-play control can be performed.
Inventors
- 👤 Toshiyuki Kimura
- 👤 Yoshio Aoyagi
- 👤 Fumio Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B19/12; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B27/11; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2545; G11B2220/2587; G11B2220/60; G11B2220/65
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
A random-play control system in a disk player for playing a disk containing sub-code signals which identify a plurality of programs, said random-play control system comprising: (a) a sub-code extractor for extracting said sub-code signals upon turn-on of a power source for the disk player; (b) a random number generator for generating random number data by starting from an initial number obtained from one of the extracted sub-code signals independently of said random number generator; and (c) determining means for determining one or more programs to be played in accordance with one or more random numbers of said random number data.
Claim 2
Dependent Claim
101 words
A random-play control system in a disk player for playing a disk containing sub-code signals which identify a plurality of programs, said random-play control system comprising: (a) a sub-code extractor for extracting said sub-code signals upon turn-on of a power source for the disk player; (b) a random number generator for generating random number data by starting from an initial number obtained from one of the extracted sub-code signals independently of said random number generator; and (c) determining means for determining one or more programs to be played in accordance with one or more random numbers of said random number data.
Claim 3
Dependent Claim
19 words
A system according to claim 1, wherein said number contained in the extracted sub-code signals is a frame number.
Claim 4
Dependent Claim
19 words
A system according to claim 1, wherein said number contained in the extracted sub-code signals is a time code.
References Cited (Backward Citations)
JPS59119579A
Cited
US4779252A
Cited
US4667314A
Cited
EP0210006A2
Cited
US4787073A
Cited
US4792934A
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EP0265286A2
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |