Signal quality monitoring system
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United States of America Patent
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Jun 22, 1993
Grant Date -
N/A
app pub date -
May 8, 1991
filing date -
May 8, 1991
priority date (Note) -
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Abstract
A cable television signal for example may be monitored and impairments determined and in many cases classified by grabbing at least portion of a transmitted frame of video information somewhere on the network to provide a video signal, performing a two dimensional Fourier transform on the video signal and analyzing the Fourier transform so obtained to determine the location of areas indicating above average occurrence of specific frequencies to provide an indication of an impairment.
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