HEVC Intra Prediction with Halftoning Technique

• Main Authors: Chien-Hung Chen, 陳建宏
• Other Authors: Yin-Yi Lin
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/69233322861263759572

碩士 === 國立中央大學 === 通訊工程學系 === 103 === In order to predict more accurately, High Efficiency Video Coding, the latest standard of video compression, has 33 different directions in intra prediction, so we can get better coding performance. However, the characteristic of single directionality has not changed. There is still plenty of room for improvement in complex texture image. To improve coding performance of intra prediction, the inpainting technique[1] has been studied but it is impractical because of its high computational complexity. In [2], Error diffusion is applied to HEVC intra prediction. It can improve the quality of prediction images by extending the information of bilateral reference pixels to them with only a little increase of time consumption. In addition, It still has 20% increase of encoding time, so we improve it in this paper. The improving error diffusion just need 5%, and the coding performance can be better. Except for the error diffusion, there is another technique named ordered dithering which come from Halftoning. We apply it to HEVC intra prediction. The results demonstrate that average 0.5% BDBR reduction can be achieved, and only need 3% increase of encoding time in the proposed algorithm, compared to HEVC intra prediction.