H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/58
H04N 9/12 (2006.01) H04N 9/64 (2006.01)
Patent
CA 1261463
Abstract of the Disclosure A digital TV receiver includes an A/D converter circuit for converting an analog video signal to a digital video signal, a signal separator circuit for separating a digital chroma signal and a digital Y signal from the digital video signal, a colour killer circuit for gating the digital chroma signal to generate a gated C signal when burst components are containing in the digital chroma signal, and a processor circuit for digitally composing RGB signals from the digital Y signal and the gated C signal. The RGB signals are used as tricolour signals for a colour CRT. The digital Y signal is obtained by subtracting the digital chroma signal from the digital video signal, this subtraction being disabled by a signal from the colour killer circuit when burst components are absent, so as to avoid unnecessary degradation of the Y signal when the colour killer is operative.
433630
Kudo Yukinori
Suzuki Susumu
Ridout & Maybee Llp
Toshiba Corporation
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