Patent ID: 9693058
Date: 2017-06-27
CPC Classifications: H04N

Claim:
1. A video decoding method in which luminance and chrominance samples are arranged as plural coding units each comprising a block of luminance and chrominance samples, the method comprising: selecting, for a particular coding unit, a size and shape of one or more prediction units each comprising luminance or chrominance samples from at least a subset of that coding unit, the selection of the prediction unit size and shape being the same for luminance samples and for chrominance samples; detecting a prediction direction in respect of each prediction unit; generating a predicted block of samples according to other samples defined by the prediction direction; when the detected prediction direction is vertical, filtering, using a horizontally-oriented filter, only a left column of samples in the predicted block of samples, and when the detected prediction direction is horizontal, filtering, using a vertically-oriented filter, only a top row of samples in the predicted block of samples; storing, in memory, decoded data associated with the predicted block of samples; and combining the decoded data with the filtered samples in the predicted block of samples, wherein the vertical prediction direction is at a first tolerance, n angle modes from a vertical mode, where n is an integer, and wherein the horizontal prediction direction is at a second tolerance, n angle modes from a horizontal mode.