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Adaptive filter for suppressing repetitive high-frequency information in a video data stream

  • US 6,879,636 B2
  • Filed: 12/10/2001
  • Issued: 04/12/2005
  • Est. Priority Date: 12/10/2001
  • Status: Expired due to Term
First Claim
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1. An adaptive filter to suppress repetitive high-frequency information in an image comprising pixels, the image having repetitive high-frequency information, comprising:

  • decision circuitry to identify the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal;

    a low-pass filter to filter the image to produce low-pass filtered pixels; and

    a switch to output the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, to output the low-pass filtered pixels as the adaptive-filter output.

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