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Sign coding and decoding

  • US 20050133607A1
  • Filed: 12/19/2003
  • Published: 06/23/2005
  • Est. Priority Date: 12/19/2003
  • Status: Active Grant
First Claim
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1. A method for sign coding, comprising:

  • determining coefficient bits to be sign coded;

    executing a sign coding instruction to generate context and decision values for the selected coefficient bits, comprising;

    identifying state variables associated with selected coefficient bits and horizontal and vertical neighboring bits of the selected coefficient bits to be processed;

    identifying sign values associated with selected coefficient bits and horizontal and vertical neighboring bits of the selected coefficient bits to be processed;

    computing horizontal and vertical values in response to the state variables and sign values identified; and

    generating context and decision values in response to the coefficient bit values.

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