Phase distortion detection circuitry for low cost automatic equalizer
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United States of America Patent
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Jan 3, 1984
Issued Date -
N/A
app pub date -
Sep 30, 1981
filing date -
Jul 10, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for detecting phase distortion in video signals due to multipath effects includes circuitry for extracting the high and low frequency content of a horizontal synchronization signal, and for comparing the phase of the high frequency content to the low frequency content to produce a signal indicative of phase distortion in the video signal. The phase distortion signal may be applied to distortion reduction circuitry, and specifically in a three tap delay line equalizer, to reduce phase distortion in the video signal.
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