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Adaptive entropy encoding/decoding for screen capture content

  • US 7,016,547 B1
  • Filed: 06/28/2002
  • Issued: 03/21/2006
  • Est. Priority Date: 06/28/2002
  • Status: Active Grant
First Claim
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1. A screen capture encoder comprising:

  • a run length encoder for encoding plural runs of symbols for pixels of screen capture content, each of the plural runs encoded as a run value and a run length, wherein the run value for at least one of the plural runs is a color value symbol, and wherein the run value for at least one of the plural rums is an above color value symbol; and

    a module for adaptively assigning plural Huffman codes to results of the encoding, wherein the module parameterizes the plural Huffman codes as a Huffman code threshold and lengths for less than all of the plural Huffman codes, thereby reducing associated bitrate for the plural Huffman codes.

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