Adaptive comb filter that cancels hugand cross-luminance errors

Details Adaptive comb filter that cancels hugand cross-luminance errors Adaptive comb filter that cancels hugand cross-luminance errors

1997-05-30

1999-02-09

Lee, Michael

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348668, 348665, H04N 978

Patent

active

058701532

ABSTRACT:
A comb filter for use in a video decoder is described. The comb filter includes a line memory for storing as successive pairs of U and V samples of a decoded video signal corresponding to a previous horizontal line of video information and a line memory for storing a second previous horizontal line of video information. The filter also includes a circuit to calculate an average value of both U and V from a previous sample and a corresponding sample from a previous line. The filter also includes a circuit for calculating a correction term for each one of the averages. The correction term is calculated from the opposite color component as was used to calculate the average value.

REFERENCES:
patent: 4893176 (1990-01-01), Faroudja
patent: 4930005 (1990-05-01), Yamada et al.
patent: 5012329 (1991-04-01), Lang et al.
patent: 5019895 (1991-05-01), Yamamoto et al.
patent: 5097322 (1992-03-01), Fairhurst
patent: 5355176 (1994-10-01), Inagaki et al.

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