US4460926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time base correcting device for audio and video signals
Assignee: Pioneer Video Corp
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Filing: 1982-05-27
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Granted: 1984-07-17
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Expires: 2002-05-27
Abstract
Abstract A time base correction device for use with a video disc reproduction system corrects the time base of the color video signal according to the phase difference between a reference signal and a color burst signal; and the time base of the audio signal is corrected according to the phase difference between a reference signal and a horizontal synch signal extracted from the video signal.
Inventors
- 👤 Shozo Nakamuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/89; H04N9/893; H04N9/80; H04N9/802
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A time base correcting device for a reproducing device for use with a recording medium in which color video data and audio data are recorded, comprising; means for separating and extracting a color burst signal and a horizontal synchronizing signal from a reproduced signal output from a pickup; video signal time base correcting means for correcting the time base of said color video data according to a first phase difference between said color burst signal and a first predetermined reference signal; and audio signal time base correcting means for correcting the time base of said audio data according to a second phase difference between said horizontal synchronizing signal and a second predetermined reference signal.
Claim 2
Dependent Claim
114 words
A time base correcting device for a reproducing device for use with a recording medium in which color video data and audio data are recorded, comprising; means for separating and extracting a color burst signal and a horizontal synchronizing signal from a reproduced signal output from a pickup; video signal time base correcting means for correcting the time base of said color video data according to a first phase difference between said color burst signal and a first predetermined reference signal; and audio signal time base correcting means for correcting the time base of said audio data according to a second phase difference between said horizontal synchronizing signal and a second predetermined reference signal.
Claim 3
Dependent Claim
47 words
A device as claimed in claim 1, wherein said video signal time base correcting means corrects the time base of a signal modulated with a video signal, and said audio signal time base correcting means corrects the time base of a signal modulated with an audio signal.
Claim 4
Dependent Claim
49 words
A device as claimed in claim 2, said video signal time base correcting means and said audio signal time base correcting means including variable delay means for delaying said modulated signals in response to said phase differences, and in amounts corresponding to said respective first and second phase differences.
Claim 5
Dependent Claim
51 words
A device as claimed in claim 1, wherein said video signal time base correcting means corrects the time base of a video signal obtained by demodulating said reproduced signal, and said audio signal time base correcting means corrects the time base of an audio signal obtained by demodulating said reproduced signal.
Claim 6
Dependent Claim
57 words
A device as claimed in claim 4, said video signal time base correcting means including variable delay means for delaying said video signal by an amount corresponding to said first phase difference, said audio signal time base correcting means including variable delay means for delaying said audio signal by an amount corresponding to said second phase difference.
Claim 7
Dependent Claim
17 words
A device as claimed in claim 1, wherein said audio signal is of one or more channels.
Claim 8
Dependent Claim
39 words
A device as claimed in claim 1, said video signal time base correcting means including a voltage controlled oscillator receiving a signal indicative of said first phase difference, and delay means comprising charge coupled devices connected to said oscillator.
Claim 9
Dependent Claim
39 words
A device as claimed in claim 1, said audio signal time base correcting means comprising a voltage controlled oscillator receiving a signal indicative of said second phase difference, and delay means comprising charge coupled devices connected to said oscillator.
Claim 10
Dependent Claim
24 words
A device as claimed in claim 8, further including division means for generating said second predetermined reference signal from said first predetermined reference signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |