A Fast Downsizing Video Transcoder for H.264/AVC with Rate-Distortion Optimal Mode Decision

Huifeng Shen, Xiaoyan Sun, Feng Wu, Houqiang Li, Shipeng Li
2006 2006 IEEE International Conference on Multimedia and Expo  
This paper focuses on the mode decision and motion selection problem when H.264/AVC video streams are transcoded in spatial resolution. A fast downsizing transcoding scheme is developed in which a new ratedistortion (R-D) optimal mode decision mechanism is presented for high speed transcoding as well as high coding efficiency. A model for estimating relative prediction errors is applied in this paper, which is free from computation of interpolation and SAD/SSD computation. Based on the selected
more » ... sed on the selected model, a motion refinement within a distance of 1 pixel is performed after mode decision. Experimental results demonstrate that our method can significantly speed up the spatial resolution reduction process, while achieving high coding efficiency.
doi:10.1109/icme.2006.262609 dblp:conf/icmcs/ShenSWLL06 fatcat:i3pmhdy4gfaelcx6mhgq6pr2ui