公开(公告)号：US20150016516A1

公开(公告)日：2015-01-15

申请号：US14256858

申请日：2014-04-18

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ankur Saxena ,  Haoming Chen ,  Felix Carlos Fernandes

IPC: H04N19/61

CPC classification number: H04N19/182 ,  H04N19/105 ,  H04N19/12 ,  H04N19/136 ,  H04N19/436 ,  H04N19/593

Abstract: In various embodiments, a method and a decoder include identifying a directional intra prediction mode with an angle of prediction. The method also includes identifying a first and second reference neighboring samples in a block of the video along the angle of prediction; the angle of prediction intersects a pixel to be predicted. The method further includes determining which of the first and second reference samples is nearest the angle of prediction and applying a value of the nearest reference neighboring sample to the pixel as a predictor. Also, a method and a decoder include determining whether a block type of a block of the video is intra block copy. The method also includes responsive to the block type being the intra block copy, determining a transform block size of the block and, responsive to the transform block size being 4×4, applying a discrete sine transform to the block.

Abstract translation: 在各种实施例中，方法和解码器包括以预测角度来识别定向帧内预测模式。 该方法还包括沿预测角度识别视频块中的第一和第二参考相邻采样; 预测角度与要预测的像素相交。 该方法还包括确定第一和第二参考样本中的哪一个最接近于预测角度，并将最近的参考相邻样本的值作为预测器应用于像素。 此外，方法和解码器包括确定视频的块的块类型是否是块内副本。 该方法还包括响应于块类型是帧内块拷贝，确定块的变换块大小，并且响应于变换块大小为4×4，对块进行离散正弦变换。