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METHODS AND SYSTEMS TO ESTIMATE MOTION BASED ON RECONSTRUCTED REFERENCE FRAMES AT A VIDEO DECODER

  • US 20110002389A1
  • Filed: 09/25/2009
  • Published: 01/06/2011
  • Est. Priority Date: 07/03/2009
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • specifying, at a video decoder, a search window in a first forward reference frame;

    specifying a search path in the search window of the first forward reference frame;

    for each motion vector MV0 in the search path, where each MV0 points from a current block to a reference block in the search window, determining a corresponding second motion vector MV1 that points to a reference block in a second reference frame, where the corresponding second motion vector MV1 is a function of MV0;

    calculating a metric for each pair of MV0 and MV1 that is found in the search path; and

    selecting the MV0 whose corresponding value for the metric is closest to an optimal value for the metric, where the selected MV0 is used as a motion vector for the current block.

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