Patent US4507112A successfully refreshed from Google Patents.
US4496993A
Expired / Lapsed
US
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Rotary recording medium
Assignee: Victor Company of Japan Ltd
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Filing: 1982-05-06
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Granted: 1985-01-29
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Expires: 2002-05-06
Abstract
Abstract A rotary recording medium is recorded with a program information signal and an address signal having a predetermined code in correspondence with the program information signal within a program information signal recorded section. This rotary recording medium is recorded with an address signal having a code different from the code of the address signal recorded within the program information signal recorded section, in a section or sections other than the above program information signal recorded section.
Inventors
- 👤 Hiroyuki Sugiyama
- 👤 Masaki Sakurai
- 👤 Ryozo Abe
- 👤 Kenji Yoshihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:56
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; G11B21/085; G11B21/022; G11B21/025; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/32; G11B2220/00; G11B2220/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A rotary recording medium comprising: a continuous spiral main track including main track turns having an information signal and an address signal recorded thereon, said address signal being a signal based upon a first coding system for representing a location of the information signal on the main track turns; and a continuous spiral lead-in track including lead-in track turns having no information signal recorded thereon, said lead-in track turns having an address signal recorded thereon based upon a second coding system which is different from the first coding system for representing a location of the lead-in track turns.
Claim 2
Dependent Claim
98 words
A rotary recording medium comprising: a continuous spiral main track including main track turns having an information signal and an address signal recorded thereon, said address signal being a signal based upon a first coding system for representing a location of the information signal on the main track turns; and a continuous spiral lead-in track including lead-in track turns having no information signal recorded thereon, said lead-in track turns having an address signal recorded thereon based upon a second coding system which is different from the first coding system for representing a location of the lead-in track turns.
Claim 3
Dependent Claim
60 words
A rotary recording medium as claimed 1 in which said information signal is recorded in program units on said main track, and said address signal comprises a time code signal indicating the position of each of the track turns on said rotary recording medium in time, and a chapter code signal indicating the position of each of said program units.
Claim 4
Dependent Claim
60 words
A rotary recording medium as claimed in claim 1 which further comprises a continuous spiral lead-out track including lead-out track turns having no information signal recorded thereon, said lead-out track turns having an address signal recorded thereon based upon a third coding system different from the first and second coding systems for representing a location of the lead-out track turns.
Claim 5
Dependent Claim
37 words
A rotary recording medium as claimed in claim 3 in which a value indicated by said address signal decreases in said lead-in track towards said main track, and increases in said lead-out track towards said main track.
Claim 6
Dependent Claim
51 words
A rotary recording medium as claimed in claim 4 in which the value indicated by said address signal is zero at a terminal end of said lead-in track which continues to said main track, and is zero at a starting end of said lead-out track which continues from said main track.
Claim 7
Dependent Claim
67 words
A rotary recording medium as claimed in claim 1 in which said information signal comprises a video signal of a system using a field frequency of 60 Hz, four fields of said video signal are recorded over one main track turn on said rotary recording medium, and said address signal includes a code repeatedly recorded with a value between "0" and "14" for every fifteen track turns.
Claim 8
Dependent Claim
77 words
A rotary recording medium as claimed in claim 1 in which said information signal comprises a video signal of a system using a field frequency of 50 Hz, four fields of said video signal are recorded over one main track turn on said rotary recording medium, and said address signal includes a code alternately recorded with a value between "0" and "11", and "0" and "12" for every twelve track turns and for every thirteen track turns.
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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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |