Intra−Planar and Intra−DC Prediction

Intra−Planar and Intra−DC Prediction（翻译）

参考文献：G.J. Han, J.R. Ohm, W.J. Han, and T. Wiegand, “Overview of the HighEfficiency Video Coding (HEVC) Standard,”IEEE Trans. Circuits Syst. Video Technol., vol.22, no. 12, pp. 1649–1668,Dec. 2012.

 

Intra_Planar and Intra_DC Prediction: Inaddition to Intra_Angular prediction that targets regions with strongdirectional edges, HEVC supports two alternative prediction methods, Intra_Planarand Intra_DC, for which similar modes were specified in H.264/MPEG-4 AVC. WhileIntra_DCprediction uses an average value of reference samples for theprediction, average values of two linear predictions using four cornerreference samples are used in Intra_Planar prediction to preventdiscontinuities along the block boundaries. The Intra_Planar prediction mode issupported at all block sizes in HEVC, while H.264/MPEG-4 AVC supports planeprediction only when the luma PB size is 16×16, and its plane predictionoperates somewhat differently from the planar prediction in HEVC.

 

Intra_Planar and Intra_DC Prediction: 作为预测有强烈方向性Intra_Angular预测的补充，HEVC支持两种类似H.264/MPEG-4AVC的模式，Intra_Planar 和 Intra_DC。Intra_DC使用参考样点的均值预测。Intra_Planar预测使用两个线性预测的均值来满足沿着块边界不连续的情况，而两个线性预测的值是利用四个边界参考样点来进行预测的。与H.264/MPEG-4 AVC仅仅在色度PB为16×16时才支持plane预测不同，HEVC在所有的块大小都支持Intra_Planar预测，并且HEVCIntra_Planar预测与AVC的plane预测在处理上有些许不同的。

Jyno  2013/09/09

 翻译仅供自己看！！！