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Signal compressing system

  • US 7,724,829 B2
  • Filed: 11/16/2009
  • Issued: 05/25/2010
  • Est. Priority Date: 02/29/1992
  • Status: Expired due to Fees
First Claim
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1. A video signal compression method comprising:

  • transforming to output a set of video frequency coefficients of an individual sub-block;

    quantizing to output a quantized set of video frequency coefficients;

    scanning the quantized set of video frequency coefficients according to a scanning pattern which is selected from a plurality of scanning patterns to produce a set of reordered coefficients;

    producing a scan selection signal indicating the scanning pattern of the scanned quantized set of video frequency coefficients;

    entropy encoding the set of reordered coefficients and outputting an entropy encoded signal; and

    transmitting the entropy encoded signal and the scan selection signal;

    wherein the scan selection signal is not entropy encoded.

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