US3681520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for improving the sharpness in a color television picture
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1971-04-15
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Granted: 1972-08-01
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Expires: 1991-04-15
Abstract
Abstract Either the red, green, or blue color signals or the red and blue color signal and a luminance signal are applied to the input of non-additive mixing means at whose output appears the color signal having the largest amplitude. The so-selected color signal serves as an input to aperture correction means. The aperture correction signal formed in response to the color signal of largest amplitude is added to all three color signals when the red, green, and blue signals are furnished, and to the luminance signal alone when the red, blue, and luminance signals are furnished.
Inventors
- 👤 Hans-Dieter Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:02
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N5/205; H04N5/208; H04N23/00; H04N23/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
In a color television system having means for furnishing a first, second, and third camera signal, an arrangement for increasing the sharpness of the reproduced image, comprising, in combination, aperture correcting means having an aperture correcting input and an aperture correcting output, and furnishing an aperture correction signal at said aperture correction output in response to a signal applied at said aperture correcting input; selecting means, having a selecting output, and furnishing, at any given time, a selection output signal at said selecting output, said selection output signal corresponding to the one of said first, second, and third camera signals having the largest amplitude at said given time; means connecting said selecting output to said aperture correcting input; and combining means combining said aperture correction signal with at least one of said first, second and third camera signals.
Claim 2
Dependent Claim
138 words
In a color television system having means for furnishing a first, second, and third camera signal, an arrangement for increasing the sharpness of the reproduced image, comprising, in combination, aperture correcting means having an aperture correcting input and an aperture correcting output, and furnishing an aperture correction signal at said aperture correction output in response to a signal applied at said aperture correcting input; selecting means, having a selecting output, and furnishing, at any given time, a selection output signal at said selecting output, said selection output signal corresponding to the one of said first, second, and third camera signals having the largest amplitude at said given time; means connecting said selecting output to said aperture correcting input; and combining means combining said aperture correction signal with at least one of said first, second and third camera signals.
Claim 3
Dependent Claim
16 words
An arrangement as set forth in claim 1, wherein said selecting means comprise non-additive mixing means.
Claim 4
Dependent Claim
51 words
An arrangement as set forth in claim 1, wherein said first, second, and third camera signals comprise, respectively, the red, green, and blue color signals; and wherein said combining means comprise first, second, and third adder means respectively adding said aperture correction signal to said red, green, and blue color signals.
Claim 5
Dependent Claim
45 words
An arrangement as set forth iN claim 1, wherein said first, second, and third camera signals respectively comprise a red and blue color signal and a luminance signal; and wherein said combining means comprise adder means adding said aperture correction signal to said luminance signal.
Claim 6
Dependent Claim
54 words
An arrangement as set forth in claim 1, wherein said aperture correction signal has a vertical and horizontal component; and wherein said aperture correcting means comprise means furnishing said horizontal component in response to said selection output signal and means furnishing said vertical component in response to a predetermined one of said camera signals.
Claim 7
Dependent Claim
21 words
An arrangement as set forth in claim 5, wherein said predetermined one of said camera signals is the green color signal.
Claim 8
Dependent Claim
26 words
An arrangement as set forth in claim 1, further comprising means for filtering low-frequency components from said camera signals prior to application to said selecting means.
References Cited (Backward Citations)
US3536826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |