US4086618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and circuit arrangement for contour correction of the luminance signal in a television camera
Assignee: Siemens AG
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Filing: 1976-04-13
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Granted: 1978-04-25
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Expires: 1996-04-13
Abstract
Abstract The invention relates to a process for the contour correction of the luminance signal in a television camera in which a horizontal contour signal is added to a relatively poorly defined luminance signal in order to increase the vertical resolution, and a vertical contour signal is added thereto in order to increase the horizontal resolution. An additional contour signal (W HV ) is formed from the product of the horizontal contour signal (W H ) with the vertical contour signal (W V ), which additional contour signal is deducted from the luminance signal (W O ).
Inventors
- 👤 Michael Koubek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:17
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N5/205; H04N5/208
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A circuit arrangement for contour correction of the luminance signal in a television camera, comprising an adder, means for feeding a relatively poorly defined luminance signal to said adder, means for feeding a horizontal contour signal to said adder for increasing the vertical resolution of the luminance signal, means for feeding a vertical contour signal to said adder for increasing the horizontal resolution of the luminance signal, signal multiplying means for deriving an additional contour signal which is the multiple of said horizontal and vertical contour signals, a signal inverter, means for feeding said additional derived contour signal through said signal inverter to said adder, said adder having an output terminal from which the combined signals may be taken.
Claim 2
Dependent Claim
119 words
A circuit arrangement for contour correction of the luminance signal in a television camera, comprising an adder, means for feeding a relatively poorly defined luminance signal to said adder, means for feeding a horizontal contour signal to said adder for increasing the vertical resolution of the luminance signal, means for feeding a vertical contour signal to said adder for increasing the horizontal resolution of the luminance signal, signal multiplying means for deriving an additional contour signal which is the multiple of said horizontal and vertical contour signals, a signal inverter, means for feeding said additional derived contour signal through said signal inverter to said adder, said adder having an output terminal from which the combined signals may be taken.
Claim 3
Dependent Claim
26 words
A circuit arrangement according to claim 1, which includes a signal limiter inserted in the input circuit of said horizontal contour signal to said multiplying means.
Claim 4
Dependent Claim
26 words
A circuit arrangement according to claim 1, which includes a signal limiter inserted in the input circuit of said vertical contour signal to said multiplying means.
Claim 5
Dependent Claim
42 words
A circuit arrangement according to claim 1, in which in the product formation of the additional contour signal, means are provided for the polarity and a limited magnitude only of the vertical contour signal to be taken into acount as a factor.
Claim 6
Dependent Claim
42 words
A circuit arrangement according to claim 1, in which in the product formation of the additional contour signal, means are provided for the polarity and a limited magnitude only of the horizontal contour signal to be taken into account as a factor.
References Cited (Backward Citations)
US3814847A
Cited
US3804980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |