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Joint coding and decoding of a reference field selection and differential motion vector information

  • US 7,620,106 B2
  • Filed: 09/02/2004
  • Issued: 11/17/2009
  • Est. Priority Date: 09/07/2003
  • Status: Active Grant
First Claim
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1. A computer-implemented method for transforming encoded video information using a computing device that implements a video decoder, the computing device comprising a processing unit and memory, the method comprising:

  • with the computing device that implements the video decoder;

    receiving encoded video information in a bitstream; and

    reconstructing a picture using the encoded video information, including;

    decoding, from the encoded video information in the bitstream, a dominant/non-dominant predictor selection jointly coded with differential motion vector information for a motion vector, wherein the decoding comprises;

    decoding a variable length code;

    determining a length of a code for a horizontal differential motion vector based at least in part on the variable length code;

    determining a length of a code for a vertical differential motion vector based at least in part on the variable length code; and

    determining the dominant/non-dominant predictor selection based at least in part on the variable length code; and

    reconstructing the motion vector based at least in part on the differential motion vector information and the dominant/non-dominant predictor selection.

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