CPC H04N 19/117 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/82 (2014.11)] | 5 Claims |
1. A method of coding video data, the method comprising:
deriving an intra prediction angle parameter specified by an intra prediction mode based on a mapping table;
deriving an inverse angle parameter by dividing 16,384 by the intra prediction angle parameter;
for a prediction mode included in a defined set of prediction modes in a range of 2 to 17, setting a value of a scale variable to:
Min(2,Log 2(nTbW)−Floor(Log 2(3*invAngle−2))+8), and
for a prediction mode included in a defined set of prediction modes in a range of 51 to 80, setting the value of the scale variable to:
Min(2,Log 2(nTbH)−Floor(Log 2(3*invAngle−2))+8),
where invAngle is the derived inverse angle, nTbW is a transform block width, and nTbH is a transform block height; and
performing a position-dependent intra prediction sample filtering process modifying prediction samples by using reference samples and weights based on the value of the scale variable.
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