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Apparatus for selectively dampening noises contained in Y signal for a video signal processing system

  • US 5,177,601 A
  • Filed: 06/14/1991
  • Issued: 01/05/1993
  • Est. Priority Date: 08/30/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for selectively dampening noises in luminance signals for a video signal processing system, comprising:

  • level limiter means for limiting amplitude levels of the luminance signals from an input terminal to provide limited luminance signals;

    noise dampening processor means for dampening noises of said limited luminance signals to provide processed luminance signals;

    buffer means for buffering said limited luminance signals to provide buffered luminance signals;

    switching means for enabling transmission of one of said processed luminance signals and said buffered luminance signals in dependence upon reception of a control signal;

    average detector means for detecting amplitude levels of said limited luminance signals to provide average luminance signals;

    comparator means for comparing said average luminance signals to a reference signal to provide a compared signal; and

    switch selector means for providing the control signal to control said switching means according to the compared signal.

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