Decoder using adaptive non-separable digital filter

Details Decoder using adaptive non-separable digital filter Decoder using adaptive non-separable digital filter

1994-11-07

1997-01-14

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348667, 348668, H04N 978

Patent

active

055945082

ABSTRACT:
A decoder using an adaptive non-separable digital filter has a correlation control circuit that generates from a composite video signal a set of filter coefficients for the non-separable digital filter. The filter coefficients are a function of a correlation angle for the image represented by the composite video signal. The non-separable digital filter, using the set of filter coefficients determined by the correlation angle, separates the composite video signal into its luminance and chrominance components. The non-separable digital filter may be approximated by a set of discrete filters having a common input, with each output being multiplied by a correlation factor, the correlation factors being the filter coefficients. The resulting multiplicands are summed to produce the separated luminance and chrominance components.

REFERENCES:
patent: 5220414 (1993-06-01), Rabii et al.
patent: 5361103 (1994-11-01), Naka et al.
patent: 5416532 (1995-05-01), Ko

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