US5159442A
Expired / Lapsed
US
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Color signal processing apparatus
Assignee: Sony Corp
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Filing: 1990-10-01
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Granted: 1992-10-27
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Expires: 2010-10-01
Abstract
Abstract A color signal processing apparatus comprising a first delay circuit for delaying an input chroma signal; a second delay circuit for delaying an output of the first delay circuit; a plurality of gain control circuits for controlling the amplitudes of the input chroma signal and the outputs of the first and second delay circuits, respectively; and an operating circuit for operating the gain-controlled amplitudes of the input chroma signal and the outputs of the first and second delay circuits, wherein the phases of the outputs of the first and second delay circuits are matched with the phase of the input chroma signal.
Inventors
- 👤 Masashi Mizuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/64; H04N9/646
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
A color signal processing apparatus comprising: (a) first delay means for delaying a chroma input signal to produce delayed output signal; (b) second delay means connected to series to said first delay means for delaying said delayed output signal of said first delay means; (c) first subtracting means operatively disposed for obtaining a first difference between the input and output signals of said first delay means; (d) second subtracting means operatively disposed for obtaining a second difference between the input and output signals of said second delay means; (e) first signal processing means operatively disposed for processing said first difference signal to obtain a first enhanced signal; (f) second signal processing means operatively disposed for processing said second difference signal to obtain a second enhanced signal; (g) first adding means operatively disposed for adding said first and second enhanced signals of said first and second signal processing means; and (h) second adding means operatively disposed for adding an added enhanced signal of said first adding means to the output signal of said first delay means.
Claim 2
Dependent Claim
175 words
A color signal processing apparatus comprising: (a) first delay means for delaying a chroma input signal to produce delayed output signal; (b) second delay means connected to series to said first delay means for delaying said delayed output signal of said first delay means; (c) first subtracting means operatively disposed for obtaining a first difference between the input and output signals of said first delay means; (d) second subtracting means operatively disposed for obtaining a second difference between the input and output signals of said second delay means; (e) first signal processing means operatively disposed for processing said first difference signal to obtain a first enhanced signal; (f) second signal processing means operatively disposed for processing said second difference signal to obtain a second enhanced signal; (g) first adding means operatively disposed for adding said first and second enhanced signals of said first and second signal processing means; and (h) second adding means operatively disposed for adding an added enhanced signal of said first adding means to the output signal of said first delay means.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1, wherein each of said first and second signal processing means comprises a limiter circuit, a noise slicing circuit, and a gain control amplifier connected in series.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1, wherein phases of the input and output signals of said first delay means are matched with each other.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1, wherein phases of the input and output signals of said second delay means are matched with each other.
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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) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |