Coding weighted angular prediction for intra coding
A method and apparatus for decoding JVET video, including receiving a bitstream, and parsing said bitstream to identify a syntax element indicating an intra direction mode to use for generating at least one predictor. The intra direction mode is a first intra direction mode in a plurality of intra direction modes that includes at least one weighted intra direction mode that corresponds to a non-weighted intra direction mode. The syntax element may identify whether to use a non-weighted or weighted intra direction mode to generate the at least one predictor. Thus, the coding unit may be coded in accordance with the at least one generated predictor associated with the selected intra direction mode.
1. An apparatus for decoding video data comprising one or more processors configured to:
(a) receive a bitstream indicating how a coding tree unit was partitioned into a plurality of coding units according to a partitioning structure that allows nodes to be split according to a partitioning technique, where at least one of said coding units is rectangular;
(b) parse said bitstream to identify at least one syntax element indicating an angular direction for an intra angular directional mode based upon one of 65 directions to use for generating at least one predictor for one each of said plurality of coding units, where said at least one predictor determines predicted samples;
(c) wherein said intra angular directional mode for a first one of said coding units comprises a weighted said intra angular directional mode, where said weighted said intra angular directional mode for said generating said at least one predictor is based upon a pixel value on at least one of said top row and said left column of said respective said coding unit along said angular direction;
(d) wherein said intra angular directional mode for a second one of said coding units comprises a non-weighted said intra angular directional mode for said generating said at least one predictor, where said weighted said intra angular directional mode and said non-weighted said intra angular directional mode are not both selected for any of said at least one predictor for any particular said coding unit, where said non-weighted said intra angular directional mode for said generating said at least one predictor is based upon a pixel value on at least one of a top row or a left column of said respective said coding unit along said angular direction;
(e) identify based upon said at least one syntax element whether to use said weighted said intra angular directional mode or said non-weighted said intra angular directional mode to generate said at least one predictor for said respective said coding unit;
(f) generate said at least one predictor using said intra angular directional mode for said first one of said coding units and generate said at least one predictor using said intra angular directional mode for said second one of said coding units; and
(g) decoding said first one of said coding units in accordance with respective said at least one predictor and decoding said second one of said coding units in accordance with respective said at least one predictor.