US4731675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dropout correcting apparatus wherein dropout detecting flog signal is superimposed on reproduced video signal
Assignee: Sony Corp
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Filing: 1985-09-10
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Granted: 1988-03-15
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Expires: 2005-09-10
Abstract
Abstract A dropout correcting apparatus has a dropout detecting circuit for detecting a dropout from a reproduced video signal. A mixing circuit superimposes a dropout detecting flag signal from the dropout detecting circuit upon the reproduced video signal. A time base fluctuation correcting circuit removes a jitter component of an output signal from the mixing circuit. A dropout detecting signal separating circuit separates the dropout detecting flag signal from the output signal of the time base fluctuation correcting circuit, and a dropout correcting circuit corrects the dropout of the reproduced video signal in response to the separated dropout detecting flag signal.
Inventors
- 👤 Kaoru Tachibana
- 👤 Ken Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/94; G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1876; H04N9/00; H04N9/79; H04N9/87; H04N9/89
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
A dropout correcting apparatus comprising: a dropout detecting circuit for detecting a dropout from a reproduced RF signal or a reproduced video signal and generating a dropout detecting flag signal in response thereto; a mixing circuit for superimposing said dropout detecting flag signal upon said reproduced video signal to produce a mixed signal; a time base fluctuation correcting circuit for removing a jitter component of said mixed signal to produce a time base corrected output signal; a dropout detecting flag signal separating circuit for separating said dropout detecting flag signal from said time base corrected output signal; and a dropout correcting circuit which corrects a dropout of said time base corrected output signal in response to said separated dropout detecting flag signal.
Claim 2
Dependent Claim
122 words
A dropout correcting apparatus comprising: a dropout detecting circuit for detecting a dropout from a reproduced RF signal or a reproduced video signal and generating a dropout detecting flag signal in response thereto; a mixing circuit for superimposing said dropout detecting flag signal upon said reproduced video signal to produce a mixed signal; a time base fluctuation correcting circuit for removing a jitter component of said mixed signal to produce a time base corrected output signal; a dropout detecting flag signal separating circuit for separating said dropout detecting flag signal from said time base corrected output signal; and a dropout correcting circuit which corrects a dropout of said time base corrected output signal in response to said separated dropout detecting flag signal.
Claim 3
Dependent Claim
31 words
A dropout correcting apparatus as claimed in claim 1, wherein said video signal has a white level and said dropout detecting flag signal has a level higher than said white level.
Claim 4
Dependent Claim
56 words
A dropout correcting apparatus as claimed in claim 2, wherein said dropout correcting circuit comprises a switching circuit changed in position in response to said separated dropout detecting flag signal and a delay circuit for interpolating a dropout portion in response to a video signal one horizontal scanning period before and producing an interpolation output signal.
Claim 5
Dependent Claim
24 words
A dropout correcting apparatus according to claim 3 further comprising a phase compensating circuit for compensating for a phase of said interpolation output signal.
References Cited (Backward Citations)
US4293869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |