Vertical resolution correcting circuit for video signal

Details Vertical resolution correcting circuit for video signal Vertical resolution correcting circuit for video signal

1992-03-27

1994-02-15

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

358315, H04N 964

Patent

active

052871746

ABSTRACT:
In a vertical resolution correcting circuit, a noncorrelation component in a vertical direction of a luminance signal included in a video signal is detected. In a region where it is considered that the detected noncorrelation component consists of vertical changes in the luminance signal itself, emphasis, which increases and decreases with a predetermined characteristic, is put on the level of a reproduced luminance signal. However, when the level of the noncorrelation component is higher than a level equal to the amplitude of a synchronizing pulse or an equalizing pulse of the video signal, emphasis is not put on the level of the reproduced luminance signal so as not to cause malfunction.

REFERENCES:
patent: 4443817 (1984-04-01), Faroudja
patent: 4926361 (1990-05-01), Ohtsubo et al.
patent: 5047866 (1991-09-01), Watanabe et al.
patent: 5060056 (1991-10-01), Miki et al.

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