Luminance and chrominance signals separating filter adaptive to

Details Luminance and chrominance signals separating filter adaptive to Luminance and chrominance signals separating filter adaptive to

1994-11-09

1996-12-17

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348663, H04N 978

Patent

active

055858619

ABSTRACT:
A luminance (Y) and chrominance (C) signals separating filter includes a motion detecting circuit which partially detects a movement of an image utilizing a correlation between frames; an inter-frame YC separating circuit which performs a separation utilizing the inter-frame correlation when the motion detecting circuit detects a still image, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; an intra-frame YC separating circuit which partially detects a correlation between fields or between frames and a correlation in a field when the motion detecting circuit detects a moving image, performs a separation utilizing the correlations, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; a C signal mixing circuit which mixes the inter-frame YC separated C signals and the intra-frame YC separated C signals in accordance with an output of the motion detecting circuit and outputs motion adaptive YC separated C signals; and a Y signal mixing circuit which mixes the inter-frame YC separated Y signals and the intra-frame YC separated Y signals in accordance with the output of the motion detecting circuit and outputs motion adaptive YC separated Y signals.

REFERENCES:
patent: 4994906 (1991-02-01), Moriwake
patent: 5146318 (1992-09-01), Ishizuka et al.
patent: 5249040 (1993-09-01), Sugiyama

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