Selection of phase offsets for interpolation filters for motion compensation

摘要

In one embodiment, a method for encoding or decoding video content is provided. The method determines a plurality of sets of interpolation filters for use in interpolating sub-pel pixel values for a temporal prediction process of video content. Different sets of interpolation filters include different phase offset characteristics. A unit of video content is received. The method then selects one of the set of interpolation filters to interpolate a set of sub-pel pixel values for use in the temporal prediction process for the unit of video content based on characteristics associated with the encoding or decoding of the video content. The one of the set of interpolation filters is selected based on the phase offset characteristic of the one of the set of interpolation filters and the characteristics associated with the encoding or decoding.

主权项

1. A method for encoding or decoding video content, the method comprising:
determining a plurality of sets of interpolation filters for use in interpolating sub-pel pixel values for a temporal prediction process of video content, wherein different sets of interpolation filters include different phase offset characteristics; receiving a unit of video content; and selecting one of the set of interpolation filters to interpolate a set of sub-pel pixel values for use in the temporal prediction process for the unit of video content based on characteristics associated with the encoding or decoding of the video content, wherein the one of the set of interpolation filters is selected based on the phase offset characteristic of the one of the set of interpolation filters and the characteristics associated with the encoding or decoding, wherein the phase offset characteristic for the one of the set of interpolation filters comprises a set of sub-pel pixel positions that is non-uniform in spacing between the set of sub-pel pixel positions.