Circuit for automatically adjusting signal separation in Y/C sep

Details Circuit for automatically adjusting signal separation in Y/C sep Circuit for automatically adjusting signal separation in Y/C sep

1994-03-23

1996-06-04

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348666, 348667, H04N 964

Patent

active

055237983

ABSTRACT:
For realizing more accurately a signal separation of a luminance signal and a chrominance signal, a signal separation automatic adjusting circuit in a YC separation comb filter includes an amplitude adjusting loop for detecting a level of a color signal component remaining in the separated luminance signal to adjust amplitudes in an image signal and a 1H delayed image signal, a first phase adjusting loop for adjusting phases of the image signal and the 1H delayed image signal which are respectively inputted into an adder, and a second phase adjusting loop for adjusting phases of the image signal and the 1H delayed image signal in the manner of suppressing the color signal remaining in the luminance signal. According to the constitution, it is possible to prevent an intermix of the color signal component into the luminance, thereby obtaining the YC separation automatic adjusting circuit having a high accuracy.

REFERENCES:
patent: 5267027 (1993-11-01), Ugaki et al.

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