Luminance/chrominance signal separation circuit having filter ci

Details Luminance/chrominance signal separation circuit having filter ci Luminance/chrominance signal separation circuit having filter ci

1990-10-15

1993-07-27

Chin, Tommy

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 978

Patent

active

052314790

ABSTRACT:
A color picture signal processing circuit, a filter circuit and a luminance/carrier chrominance signal separation circuit implemented by employing the filter circuit. The circuit processing signal includes an adaptive-type (C) comb line filter through which the luminance signal is caused to pass. The output of the filter undergoes amplitude limitation in a limiter circuit, the output of which is subtracted from the original luminance signal. The carrier chrominance signal is added to the luminance signal to obtain a composite picture signal. The filter circuit is comprised of a pulse pattern suppressing circuit including a decision circuit for deciding which of positive and negative patterns the three adjacent data form constitute, a positive pulse pattern suppressing circuit, a negative pulse pattern suppressing circuit and a circuit selecting for either one of the output signal of the positive and negative pulse pattern suppressing circuits in accordance with the result of decision made by the decision circuit.

REFERENCES:
Flicker-Free Non Interlaced Receiving System For Standard Color TV Signals, by Okada, et al., IEEE Transactions on Consumer Electronics, vol./CE-31, No. 3, Aug. 1985 pp. 240-254.
New Filter Technology In Picture Processing, By Okada, et al., IEEE Transactions on Consumer Electronics, vol. CE-28, No. 3, Aug. 1982, pp. 158-167.

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