Wide bandwidth chrominance noise reduction system
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United States of America Patent
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Jun 9, 1987
Grant Date -
N/A
app pub date -
Feb 14, 1985
filing date -
Feb 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus and method for chroma noise reduction in a quadrature modulated color television signal path carries out the steps of detecting a chroma signal noise component in the path; detecting predetermined signal characteristics in the path; generating a control signal as a function of the detected signal characteristics wherein the signal characteristics include at least one of: luminance component amplitude, luminance component level transition, and a combination of simultaneously occurring conditions in luminance and chrominance signal components in the path; applying the control signal to separate chroma signal component noise from the predetermined signal characteristics; and subtracting the separated chroma noise in time coincidence with the color television signal in the path, whereby chroma noise is reduced from the signal path without bandwidth reduction.
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