Luminance peaking filter for use in digital video signal process

Details Luminance peaking filter for use in digital video signal process Luminance peaking filter for use in digital video signal process

1984-04-23

1986-07-29

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 38, 358 39, H04N 514, H04N 964

Patent

active

046033530

ABSTRACT:
A digital luminance processing circuit for peaking or depeaking high frequency luminance signal components includes the parallel combination of a low pass circuit and a bandpass circuit. The relative magnitude of the bandpass response is controlled by a linearly variable multiplier constructed with minimal hardware including four AND gates and three adders. The low pass and bandpass circuits share delay stages to further reduce hardware. The overall response of the processing circuit closely emulates the frequency response to processed luminance signal in current analog television receivers over the video signal frequency range.

REFERENCES:
patent: 2263376 (1941-11-01), Blumlein et al.
patent: 3984631 (1976-10-01), Avicola
patent: 3984865 (1976-10-01), Avins
patent: 4041531 (1977-08-01), Bingham
patent: 4074308 (1978-02-01), Gibson
patent: 4437124 (1984-03-01), Cochran
patent: 4538178 (1985-08-01), Bolger

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