Pattern-adaptive digital comb filter for separation of a luminan

Details Pattern-adaptive digital comb filter for separation of a luminan Pattern-adaptive digital comb filter for separation of a luminan

1991-06-20

1995-02-28

Groody, James J.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348667, H04N 978

Patent

active

053941934

ABSTRACT:
In a circuit(s) which separates luminance and color signals of the digital color television, the present invention can reduce the noise as a circuit which adaptively performs the 1H comb filtering or the 2H comb filtering according to the correlation between upper and lower horizontal scanning lines of three successive horizontal lines when the luminance and color signals from an input video signal are to be separated. Also, even if the irregular video signal is applied, the present invention can reduce the artifact(s), by passing it without comb-filtering operation.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4855815 (1989-08-01), Yasuki et al.
patent: 5025311 (1991-06-01), Hosoi
Barton, Steve, "A Practical Charge-Coupled Device Filter for the Separation of Luminance and Chrominance Signals in a Television Receiver", IEEE Transaction on Consumer Electronics vol. CE-23 No. 3 Aug. 1977.

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