Television – Image signal processing circuitry specific to television – Chrominance-luminance signal separation
Patent
1992-04-09
1994-11-22
Powell, Mark R.
Television
Image signal processing circuitry specific to television
Chrominance-luminance signal separation
348666, H04N 978
Patent
active
053673425
ABSTRACT:
An apparatus for separating a luminance signal and a chrominance signal from a video signal includes a subtractor for obtaining a difference (first subtract signal) between the original composite video signal and a one line-delayed video signal and a difference (second subtract signal) between the one line-delayed video signal and a two line-delayed video signal, an adder for adding the first subtract signal to the second subtract signal, a line correlation detector for detecting a correlation between adjacent horizontal scanning lines, and a multiplexer for selecting one of the first subtract signal, the second subtract signal, an add signal from the adder, and an output signal from a band pass filter which band pass-filters the one line-delayed video signal, in response to an output signal from the line correlation detector whereby the apparatus provides improved resolution, thereby assuring excellent picture quality.
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Hanging Dot Reducer For NTSC 1H Comb Filter, RCA Enginnering Laboratories, Ltd., Jan. 1990, S. Shiratsuchi.
Gold Star Co. Ltd.
Miller John W.
Powell Mark R.
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