US4777539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recording time codes onto a video disk including periodic adjustment of time codes
Assignee: Pioneer Video Corp
•
Filing: 1986-09-03
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Granted: 1988-10-11
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Expires: 2006-09-03
Abstract
Abstract A video disk recording method and the recorded disk in which a video signal is frequency-multiplexed with a digital data signal into respective frames which are asynchronous to each other. A time code is recorded in both types of frames. The time is incremented periodically but the period in one of the types of frames is occasionally varied to compensate for the asynchronism.
Inventors
- 👤 Satoru Nomura
- 👤 Yoshihisa Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/3063; G11B27/36; G11B2220/00; G11B2220/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
A method of recording onto a video disk in which a television video signal, including television frames, and a digital data signal are frequency-divided, and multiplex recorded onto the same track of said video disk, said method comprising the steps of: dividing said digital data signal into subcode frames each having a length shorter than one of said television frames of said television video signal, said subcode frames being asynchronous with said television frames; recording television time codes onto said television frames and subcode time codes onto said subcode frames, each of said time codes including a second value and a minute value; incrementing said second value of said subcode time codes after a first number of subcode frames; incrementing said second value of said television time codes after a first number of television frames; changing one of said first number of subcode frames and said first number of television frames by a predetermined value for frames associated with said one changed number recorded with at least one of predetermined second values and predetermined minute values.
Claim 2
Independent Claim
176 words
A method of recording onto a video disk in which a television video signal, including television frames, and a digital data signal are frequency-divided, and multiplex recorded onto the same track of said video disk, said method comprising the steps of: dividing said digital data signal into subcode frames each having a length shorter than one of said television frames of said television video signal, said subcode frames being asynchronous with said television frames; recording television time codes onto said television frames and subcode time codes onto said subcode frames, each of said time codes including a second value and a minute value; incrementing said second value of said subcode time codes after a first number of subcode frames; incrementing said second value of said television time codes after a first number of television frames; changing one of said first number of subcode frames and said first number of television frames by a predetermined value for frames associated with said one changed number recorded with at least one of predetermined second values and predetermined minute values.
Claim 3
Dependent Claim
35 words
A method as recited in claim 1, wherein said changing step changes said one number by said predetermined value for frames associated with said one number recorded with predetermined second values and predetermined minute values.
Claim 4
Dependent Claim
13 words
A method as recited in claim 2, wherein said predetermined value is one.
Claim 5
Dependent Claim
33 words
A method as recited in claim 3, wherein said changing step changes said one number nine times for every two increments of said minute value of said frames associated with said one number.
Claim 6
Dependent Claim
13 words
A method as recited in claim 2, wherein said predetermined value is five.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |