Patent US4893192A successfully refreshed from Google Patents.
US4893192A
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Video signal drop-out corrector circuit responsive to level of luminance component of the signal
Assignee: Pioneer Corp
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Filing: 1988-03-16
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Granted: 1990-01-09
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Expires: 2008-03-16
Abstract
Abstract A drop-out corrector circuit for video signals read from a recording medium such as a video disk or the like. Predetermined components, specifically envelope components, are detected in the high-frequency signal read from the disk including the video signal. The output level of the detection signal thus produced is compared with a reference level, and a drop-out detection signal is produced as the result of this comparison.
Inventors
- 👤 Shinichi Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:06
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/94
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A drop-out corrector circuit for video signals comprising: detecting means for detecting specific predetermined components of high-frequency signals including said video signals; comparator means for comparing the output level of said detector means with a reference level and producing a drop-out detection pulse in response to the results of the comparison; and means for varying said reference level according to the level of a luminance signal component of said video signals.
Claim 2
Dependent Claim
71 words
A drop-out corrector circuit for video signals comprising: detecting means for detecting specific predetermined components of high-frequency signals including said video signals; comparator means for comparing the output level of said detector means with a reference level and producing a drop-out detection pulse in response to the results of the comparison; and means for varying said reference level according to the level of a luminance signal component of said video signals.
Claim 3
Dependent Claim
23 words
The drop-out corrector circuit as claimed in claim 1, wherein said detector means comprises means for detecting envelope components in said high-frequency signals.
Claim 4
Dependent Claim
25 words
The drop-out corrector circuit as claimed in claim 1, wherein said detector means comprises means for detecting specific predetermined frequency components in said high-frequency signals.
References Cited (Backward Citations)
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FR2316809A1
Cited
GB1551070A
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JPS5765968A
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US4623994A
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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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |