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Interpolation filter support for sub-pixel resolution in video coding

  • US 8,705,622 B2
  • Filed: 04/08/2009
  • Issued: 04/22/2014
  • Est. Priority Date: 04/10/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • obtaining a block of pixels, wherein the block of pixels includes integer pixel values corresponding to integer pixel positions within the block of pixels;

    computing sub-pixel values for sub-pixel positions associated with the block of pixels based on the integer pixel values, wherein computing the sub-pixel values comprises applying an interpolation filter that defines a two-dimensional array of filter support positions corresponding to a set of twelve or more integer pixel positions that surround the sub-pixel positions in a radial shape, and wherein the interpolation filter is used during an inter-prediction video coding process; and

    generating a prediction block based on at least some of the sub-pixel values.

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