Distance-based Weighted Prediction for H.264 Intra Coding
Intra 4×4 is one of the two primary intra prediction types supported in H.264/AVC. For intra 4×4 prediction, eight modes are to capture orientations of images with DC mode to reflect flat regions. Therefore the smoothly-varying regions which are very common in ordinary images can not be well decorrelated. In this paper, to improve decorrelation performance of intra 4×4 prediction, we propose a distance-based weighted prediction (DWP) method to take the place of DC mode. In DWP, weighted prediction is performed with the weighting coefficients inversely relative to the distances between current pixel and its reference pixels. We also present an integral DWP (iDWP) method which is of much lower computational complexity than DWP. Experimental results demonstrate that DWP and iDWP yield average PSNR enhancements of 0.12 dB and 0.1 dB over current H.264 using 4×4 DC prediction respectively.
Shengsheng Yu Yi Gao Jiazhong Chen Jingli Zhou
Department of Computer Science, Huazhong University of Science & Technology Wuhan 430074, Peoples Republic of China
国际会议
2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)
镇江
英文
1477-1480
2008-07-07（万方平台首次上网日期，不代表论文的发表时间）