System for determining noise content of a video signal in the di

Details System for determining noise content of a video signal in the di System for determining noise content of a video signal in the di

1993-05-11

1994-07-12

Groody, James J.

Television

Monitoring, testing, or measuring

348193, H04N 1700, H04N 1702

Patent

active

053293118

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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patent: 4935814 (1990-06-01), Omoto et al.
patent: 5073822 (1991-12-01), Gumm et al.
patent: 5221967 (1993-06-01), Ward
A Measurement of Signal to Noise Ratio of a Television Broadcast Picture-IEEE Transaction on Broadway vol. 37 No. 2 Jun. 1991 C. D. Janst van Rensburg et al.

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