Luminance/chrominance separator including cross-talk reducing fu

Details Luminance/chrominance separator including cross-talk reducing fu Luminance/chrominance separator including cross-talk reducing fu

1992-01-23

1994-03-01

Powell, Mark R.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

H04N 978

Patent

active

052912787

ABSTRACT:
A luminance/chrominance separator includes a high pass filter for separating a high-frequency signal from a composite video signal, an adder for finding a sum signal indicative of a sum of signals before and after one horizontal period with respect to the high-frequency signal, a subtracter for finding a difference between the signals before and after one horizontal period, and a selection circuit for selecting smaller one of the sum and difference signal in absolute value, wherein an output of the selection circuit is used to suppress any leakage of luminance and chrominance signals into the output of a comb filter.

REFERENCES:
patent: 5025311 (1991-06-01), Hosoi
patent: 5093715 (1992-03-01), Tokuhara et al.

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