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Methods and systems to estimate motion based on reconstructed reference frames at a video decoder

  • US 9,538,197 B2
  • Filed: 12/22/2014
  • Issued: 01/03/2017
  • Est. Priority Date: 07/03/2009
  • Status: Active Grant
First Claim
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1. A machine-implemented method to estimate motion at a video decoder, comprising:

  • defining, at the decoder, a motion estimation search window for a first coding block of a first frame of a video;

    selecting, at the decoder, a motion vector to a block of a second frame of the video and a motion vector to a block of a third frame of the video based on the search window, distances between the first frame and each of the second and third frames, and a measure of visual similarity between the respective blocks of the second and third frames;

    deriving, at the decoder, a motion vector for the first block based on the selected motion vector to a block of the second frame and the selected motion vector to a block of the third frame;

    storing the motion vector for the first block to a memory coupled with, or included in, the video decoder; and

    predicting the first block based on the stored motion vector and the block of the second or third frame.

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