US4864423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording disc and information signal recording apparatus therefor
Assignee: Teac Corp
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Filing: 1988-11-17
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Granted: 1989-09-05
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Expires: 2008-11-17
Abstract
Abstract An information recording disc has a control signal such as an address signal pre-recorded on a guide track which is pre-formed on the information recording disc at a position different from a track position where an information signal is to be recorded. An information signal recording apparatus for recording the information signal on such an information recording dics controls a rotation frequency of the information recording disc to a constant rotation frequency by locking a horizontal synchronizing signal within a composite video signal to edges of pulses reproduced from the guide track, and the information signal is recorded on the information recording disc so that a recording interval of the control signal is positioned within a vertical blanking period of the information signal at least including the composite video signal.
Inventors
- 👤 Tadao Nagai
- 👤 Hirohisa Yamaguchi
- 👤 Akira Mashimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:06
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/82; H04N9/83; H04N9/835; H04N9/8355; G; G11; G11B; G11B7/00; G11B7/004; G11B7/08; G11B7/09; G11B7/0938; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/9201
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
195 words
An information signal recording apparatus for recording an information signal including a composite video signal on an information recording disc, said information recording disc comprising a recording surface and a guide track formed on said recording surface at a position different from a track position of the information signal which is to be recorded, said guide track comprising a spiral guide track or concentric guide tracks, said guide track being pre-recorded with a control signal in recording portions thereof, said information signal recording apparatus comprising: a motor for rotating said information recording disc; recording means for recording the information signal on said information recording disc while reproducing said control signal from said information recording disc; and control means responsive to a synchronizing signal within the information signal and a reproduced control signal reproduced from said guide track of said information recording disc for controlling a rotation of said motor so that said recording means records the information signal on an information signal recording track located in a region between two mutually adjacent track turns of said guide track by positioning each of said recording portions within a vertical blanking period of the composite video signal.
Claim 2
Dependent Claim
195 words
An information signal recording apparatus for recording an information signal including a composite video signal on an information recording disc, said information recording disc comprising a recording surface and a guide track formed on said recording surface at a position different from a track position of the information signal which is to be recorded, said guide track comprising a spiral guide track or concentric guide tracks, said guide track being pre-recorded with a control signal in recording portions thereof, said information signal recording apparatus comprising: a motor for rotating said information recording disc; recording means for recording the information signal on said information recording disc while reproducing said control signal from said information recording disc; and control means responsive to a synchronizing signal within the information signal and a reproduced control signal reproduced from said guide track of said information recording disc for controlling a rotation of said motor so that said recording means records the information signal on an information signal recording track located in a region between two mutually adjacent track turns of said guide track by positioning each of said recording portions within a vertical blanking period of the composite video signal.
Claim 3
Dependent Claim
106 words
An information signal recording apparatus as claimed in claim 1 in which said control means comprises a separating circuit for separating a composite synchronizing signal from the composite video signal of the information signal which is to be recorded, a pulse generating circuit responsive to the separated composite synchronizing signal for generating a first pulse signal which undergoes a transition within one predetermined horizontal scanning period, and a phase comparator for comparing a phase of said first pulse signal and a phase of a signal which is synchronized to edges of the reproduced control signal and for producing a phase error signal which controls said motor.
Claim 4
Dependent Claim
54 words
An information signal recording apparatus as claimed in claim 2 in which said control means further comprises a circuit for supplying to said phase comparator a second pulse signal which undergoes a transition responsive to edges of the reproduced control signal which is reproduced first during one revolution period of said information recording disc.
Claim 5
Dependent Claim
88 words
An information signal recording apparatus as claimed in claim 2 in which said pulse generating circuit comprises a circuit for discriminating whether the separated composite synchronizing signal is of an odd field or an even field and for generating a second pulse signal which undergoes a first transition at the odd field and a second transition at the even field, and a circuit for delaying said second pulse signal so as to generate said first pulse signal which undergoes a transition within said one predetermined horizontal scanning period.
Claim 6
Dependent Claim
33 words
An information signal recording apparatus as claimed in claim 1 in which said recording means records an information signal which has a frequency band different from a frequency band of said control signal.
Claim 7
Dependent Claim
130 words
An information signal recording apparatus as claimed in claim 1 in which a first track turn out of said two mutually track turns of said guide track comprises a first recording portion in which said control signal is pre-recorded and a second track turn out of said two mutually adjacent tracks turns of said guide track comprises a second recording portion in which said control signal is pre-recorded, said first track turn being scanned before in time as compared to said second track turn, said control means controlling said motor so that said recording means records a color burst signal of the composite video signal approximately at a center of an interval between a terminal position of said first recording portion and a starting position of said second recording portion.
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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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |