US 5,635,995 A · Dual chrominance signal processor for combined TV/VCR systems

Abstract

A dual chrominance signal processor is disclosed which may be used in a combination television and video cassette recorder system, for example. Such a chrominance signal processor includes first and second modulated chrominance signal sources, and first and second demodulating carrier signal sources, corresponding to the first and second modulated chrominance signal sources, respectively. A demodulator is responsive to a chrominance signal and a demodulating carrier signal, for demodulating the chrominance signal. A signal selector is coupled between the signal sources and the demodulator, and selectively couples one of the first and second chrominance signal sources, and the corresponding one of the first and second demodulating carrier signal sources, to the demodulator in response to a selection signal.

Claims9

Dependent claims

A dual chrominance signal processor for processing first and second modulated chrominance signals, comprising:

first and second demodulating carrier signal sources;
a first signal selector, coupled to said first and second demodulating carrier signal sources for selectively coupling one of the first and second demodulating carrier signal sources, to a first signal selector output terminal response to a selection signal;
and
a second signal selector for selectively coupling one of the first and second chrominance signals to a second signal selector output terminal in response to said selection signal;
and
a quadrature demodulator, coupled to said first and second signal selector output terminals, responsive to a selected chrominance signal and a selected demodulating carrier signal, for demodulating the chrominance signal.

3 more elements

In a combined television receiver and video cassette recorder, a chrominance signal processor for processing both a broadcast chrominance signal and a color-under chrominance signal, comprising:

a broadcast demodulating carrier signal source;
a color-under demodulating carrier signal source;
a demodulator, responsive to a selected chrominance signal and a selected demodulating carrier signal, for demodulating the chrominance signal;
and
a signal selector, coupled to the demodulating carrier signal sources, for selectively coupling one of the broadcast modulated chrominance signal source and the color-under modulated chrominance signals, and the corresponding one of the broadcast demodulating carrier signal source and the color-under demodulating carrier signal source, to the demodulator in response to a selection signal.

2 more elements

Dependencies are inferred from the claim text.

Dual chrominance signal processor for combined TV/VCR systems

Life of this patent

Dual chrominance signal processor for combined TV/VCR systems

Life of this patent

Abstract

Claims9