@inproceedings{95b0dc43a8714ce886ab31467baa98fd,
title = "A fast intra 4×4 mode decision algorithm for H.264/AVC down rate transcoding",
abstract = "H.264/AVC adopts 9 intra 4×4 prediction modes to improve the intra frame compression efficiency. This makes the intra frame coding and transcoding very complex. In this paper, a fast intra 4×4 mode decision algorithm is proposed to reduce the intra transcoding complexity. Firstly, the surrounding modes in the high bitrate and the modes of the neighboring blocks in the current bitrate are used to form the candidate modes. Secondly, the variance and mean of the intra prediction residual are used to further reduce the size of the candidate mode set. Thirdly, the intra mode context model is built from the high bitrate modes and updated by the low bitrate modes to order the candidate modes. An early skip scheme is used to terminate the mode decision process. Experimental results show that about 50\% intra 4×4 modes can be saved with a penalty on coding efficiency less than 0.1dB. The transcoding performance can even gain up to 0.6 dB on some sequences.",
keywords = "Down rate transcoding, Fast intra mode decision, Transcoding",
author = "Zhihang Wang and Luhong Liang and Shengfu Dong and Wen Gao and Debin Zhao and Qingming Huang",
year = "2010",
doi = "10.1117/12.863464",
language = "英语",
isbn = "9780819482341",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Visual Communications and Image Processing 2010",
note = "Visual Communications and Image Processing 2010 ; Conference date: 11-07-2010 Through 14-07-2010",
}