US4475133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video tape recording apparatus with time base correction
Assignee: Olympus Corp
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Filing: 1981-11-09
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Granted: 1984-10-02
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Expires: 2001-11-09
Abstract
Abstract A video tape recording apparatus using an Hadamard transformation system for recording and reproducing a video signal is disclosed. Facilities are provided for distributing the video signal to a plurality of channels, recording and reproducing the distributed video signals with a plurality of magnetic heads, generating a window pulse from a time-base correction signal obtained by separating a horizontal synchronizing signal from the video signal, means for discriminating phase coincidence of the window pulse and a sampling signal of one phase for transformation, detecting a time-base correction signal by the phase coincidence signal immediately after extinction thereof, and generating a sampling signal of a proper phase as an inverse transformation signal on the basis of the time-base correction signal.
Inventors
- 👤 Kenji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/917; H04N5/919; H04N5/93; H04N5/95
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
A video tape recording apparatus for recording and reproducing a video signal having a horizontal synchronizing signal, comprising means for distributing the video signal to a plurality of channels, a plurality of magnetic recording heads, means for separating a horizontal synchronizing signal from the video signal, means for generating a pulse from the separated synchronizing signal, means to generate sampling signals for sampling the signals in each channel and subjecting the signals to a transformation, means for sensing phase coincidence of the pulse and a sampling signal of one channel, means for mixing the separated synchronizing signal with the output of the means for sensing coincidence for producing a time-base correction signal, means for recording the transformed signals and the correction signal with the magnetic heads, means for detecting the recorded signals, means for generating a resampled signal on the basis of the detected time-base correction signal and for resampling the detected recorded signals, and means for subjecting the resampled signals to an inverse transformation.
Claim 2
Dependent Claim
165 words
A video tape recording apparatus for recording and reproducing a video signal having a horizontal synchronizing signal, comprising means for distributing the video signal to a plurality of channels, a plurality of magnetic recording heads, means for separating a horizontal synchronizing signal from the video signal, means for generating a pulse from the separated synchronizing signal, means to generate sampling signals for sampling the signals in each channel and subjecting the signals to a transformation, means for sensing phase coincidence of the pulse and a sampling signal of one channel, means for mixing the separated synchronizing signal with the output of the means for sensing coincidence for producing a time-base correction signal, means for recording the transformed signals and the correction signal with the magnetic heads, means for detecting the recorded signals, means for generating a resampled signal on the basis of the detected time-base correction signal and for resampling the detected recorded signals, and means for subjecting the resampled signals to an inverse transformation.
Claim 3
Dependent Claim
76 words
An apparatus as in claim 1, wherein said means for generating a resampled signal includes an automatic phase control circuit for automatically controlling the phase of the detected recorded signals on the basis of the detected time-base correction signal and an automatic frequency control circuit for automatically controlling the sampling rate on the basis of signals from the phase control circuit and the detected time-base correction signal, said means for sensing phase coincidence including a gate.
Claim 4
Dependent Claim
117 words
A video tape recording apparatus for recording and reproducing a video signal having a horizontal synchronizing signal, comprising: means for distributing the video signal with the synchronizing signal to a plurality of distributed signals, means for recording and reproducing the distributed signals and including a plurality of magnetic heads for producing recorded signals; said means for recording and reproducing including time-base correction means for generating a time-base correction signal from said horizontal synchronizing signal, means for producing a plurality of channel signals from the recorded signals coincident with the time-base of the time-base correcting means, and logic means for producing a synchronization signal from the time-base correction signal for correcting the time-base contained in each channel signal.
Claim 5
Dependent Claim
117 words
A video tape recording apparatus for recording and reproducing a video signal having a horizontal synchronizing signal, comprising: means for distributing the video signal with the synchronizing signal to a plurality of distributed signals, means for recording and reproducing the distributed signals and including a plurality of magnetic heads for producing recorded signals; said means for recording and reproducing including time-base correction means for generating a time-base correction signal from said horizontal synchronizing signal, means for producing a plurality of channel signals from the recorded signals coincident with the time-base of the time-base correcting means, and logic means for producing a synchronization signal from the time-base correction signal for correcting the time-base contained in each channel signal.
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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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |