Method of reproducing a chrominance signal from a previously low

Details Method of reproducing a chrominance signal from a previously low Method of reproducing a chrominance signal from a previously low

1984-10-30

1988-06-28

Cardillo, Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358324, 358329, 358310, H04N 983

Patent

active

047543400

ABSTRACT:
A low-range-converted chrominance signal is demodulated into two color difference signals. The two color difference signals are each filtered by a comb filter to eliminate undesired components. The two color difference signals, having been filtered, are modulated to obtain a carrier chrominance signal having a prescribed carrier frequency. To be suitable for digital signal processing, the low-range-converted chrominance signal is sampled at a first frequency which is an integral multiple of a low-range-converted carrier frequency of the low-range-converted chrominance signal when being demodulated. The two color difference signals are sampled at a second frequency which is an integral multiple of the prescribed carrier frequency of the carrier chrominance signal.

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