Y/C separator and Y/C separating method

Details Y/C separator and Y/C separating method Y/C separator and Y/C separating method

2006-09-19

2006-09-19

Hsia, Sherrie (Department: 2622)

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

C348S665000

Reexamination Certificate

active

07110045

ABSTRACT:
A Y/C separator improving characteristics of dot crawl elimination and cross-color interference elimination even at a sampling frequency unequal to an integer multiple of a color subcarrier frequency of an NTSC television signal. A received composite color television signal is quantized by a clock signal with a frequency synchronized to the horizontal sync signal of an input signal. Chrominance component values are extracted in various directions of a target sample by using neighboring samples of the target sample. The chrominance component is obtained by selecting and outputting the extracted chrominance component values in accordance with correlation values of the corresponding samples from which the color component is removed. The calculation of the chrominance component extraction value is carried out by detecting the phase rotation angle of the color subcarrier signal per clock near the target sample, and in response to the detected value.

REFERENCES:
patent: 5361103 (1994-11-01), Naka et al.
patent: 6384873 (2002-05-01), Rumreich et al.
patent: 4-340891 (1992-11-01), None
patent: 5-115073 (1993-05-01), None
patent: 8-265798 (1996-10-01), None

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