System for determining noise content of a video signal in the disclosure
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United States of America Patent
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Jul 12, 1994
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N/A
app pub date -
May 11, 1993
filing date -
May 11, 1993
priority date (Note) -
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Abstract
A method of determining the noise content of a video signal by digitizing a frame based on the video signal to provide a digitized signal which is then filtered via a high pass filter. The filtered image is then divided into a plurality of subimages and the noise signal in each of the subimages is determined from a selected number of subimages having the lowest noise signal are further processed to determine the average noise in the selected subimages and the signal-to-noise ratio determined. The carrier-to-noise ratio may also be determined if desired.
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