Coding weighted angular prediction for intra coding

1. An apparatus for coding video data comprising one or more processors configured to:

receive a bitstream indicating how a coding tree unit was partitioned into coding units according to a partitioning structure that allows nodes to be split according to a partitioning technique;

parse said bitstream to identify an intra direction mode to use for generating at least one predictor, wherein the intra direction mode is a first intra direction mode in a plurality of intra direction modes and one or more weighted versions of the first intra direction mode includes at least one weighted intra direction mode that corresponds to a non-weighted intra direction mode, the at least one weighted intra direction mode predicting a pixel value based on both a top row and a left column of the same reference tier;

identify from a syntax element in the bitstream whether to use a first non-weighted or weighted intra direction mode to generate the at least one predictor;

generate the at least one predictor using the intra direction mode; and

coding said coding unit in accordance with the at least one generated predictor associated with the selected intra direction mode.

2. The apparatus of claim 1 , further comprising identifying a syntax element in the bitstream that identifies whether a weighted angular mode exists for a corresponding non-weighted angular mode.

3. The apparatus of claim 1 , further comprising identifying a syntax element in the bitstream that indicates a distinction between an original angular mode and a corresponding weighted angular mode.

4. The apparatus of claim 1 , further comprising identifying a syntax element in the bitstream that identifies whether to use the first intra direction mode or the corresponding weighted intra direction mode for intra coding.

5. The apparatus of claim 1 , further comprising identifying a syntax element in the bitstream that includes at least one weighted value of the second intra direction mode.

6. The apparatus of claim 1 , wherein a plurality of non-weighted/weighted intra direction mode pairs exist for the coding unit.

7. The apparatus of claim 1 , wherein only a limited number of intra direction modes have a corresponding weighted intra direction mode.

8. The apparatus of claim 1 , wherein only a single first intra direction mode is allowed to have a corresponding weighted intra direction mode.

9. The apparatus of claim 1 , wherein a second, weighted intra direction mode is included in a most probable mode calculation.

10. The apparatus of claim 1 , wherein a second, weighted intra direction mode is not included in a most probable mode calculation unless or until the weighted intra direction mode is used by a neighboring coding unit.

11. A method of intra prediction coding of a JVET bitstream, the method comprising:

receiving a bitstream indicating how a coding tree unit was partitioned into coding units according to a partitioning structure that allows nodes to be split according to a partitioning technique;

parsing said bitstream to identify an intra direction mode to use for generating at least one predictor,

wherein the intra direction mode is a first intra direction mode in a plurality of intra direction modes and one or more weighted versions of the first intra direction mode includes at least one weighted intra direction mode that corresponds to a non-weighted intra direction mode, the at least one weighted intra direction mode predicting a pixel value based on both a top row and a left column of the same reference tier;

identifying from a syntax element in the bitstream whether to use a non-weighted or weighted first intra direction mode to generate the at least one predictor; generating the at least one predictor using the intra direction mode; and coding said coding unit in accordance with the at least one generated predictor associated with the selected intra direction mode.