| CPC H04N 19/44 (2014.11) [H04N 19/105 (2014.11); H04N 19/117 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/82 (2014.11)] | 20 Claims |
|
1. A method of video decoding in a decoder, comprising:
determining directionality of each of a plurality of groups of pixels of a video frame and performing at least one of a constrained directional enhancement filter (CDEF) process or an intra prediction coding process based on the determined directionalities;
reusing the determined directionalities of the plurality of groups of pixels to determine directionality information of a restoration filter unit that is formed by merging the plurality of groups of pixels according to a scanning order, wherein the restoration filter includes the plurality of groups of pixels and each of the plurality of group of pixels has a respective one of the determined directionalities;
generating a plurality of sets of filter parameters of a restoration filter process based on the determined directionalities of the plurality of groups of pixels, each of the determined directionalities of the plurality of groups of pixels defining one or more corresponding sets of filter parameters of the plurality of sets of filter parameters;
selecting, based on the directionality information of the restoration filter unit, a set of filter parameters from among the plurality of sets of filter parameters of the restoration filter process;
after performing the CDEF process or the intra prediction coding process, performing one of a Wiener filter process or a self-guided projection filter process as the restoration filter process on the restoration filter unit based on the selected set of filter parameters; and
reconstructing the video frame based on the filtered restoration filter unit.
|