Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-10-15
1994-10-11
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348664, H04N 521
Patent
active
053551770
ABSTRACT:
A luminance/color signal separation apparatus comprising an analog/digital converter for converting a composite video signal inputted therein into a digital composite video signal, an adjacent signal detection circuit for detecting from the composite video signal from the analog/digital converter a target composite video signal from which luminance and color signals are to be separated and vertically and horizontally composite video signals, two-dimensional, horizontal and vertical pseudo median filtering circuits for outputting first to third luminance signals, respectively, a control signal generation circuit for generating horizontal and vertical control signals, a luminance signal selection circuit for selecting one of the first to third luminance signals in response to the horizontal and vertical control signals and outputting the selected luminance signal as the final luminance signal, a delay unit for delaying the target composite video signal by a predetermined time period for a timing matching with the final luminance signal, a color signal extractor for removing the final luminance signal from the delayed target composite video signal to extract a color signal therefrom, and a band pass filtering circuit for filtering the color signal from the color signal extractor at a narrow band to remove a color spread phenomenon thereof.
REFERENCES:
patent: 4969033 (1990-11-01), Yamada
patent: 5047840 (1991-09-01), Miki
patent: 5155583 (1992-10-01), Yoshimura et al.
Goldstar Co. Ltd.
Kostak Victor R.
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