文件名称：transcoding from h.263 to h.264
文件大小：1.32MB
文件格式：PDF
更新时间：2012-08-04 10:46:46
transcoding,h.264
In this paper, we investigate and propose efficient methods for transcoding H.263 video to H.264/AVC standard by exploiting the new coding features. Specifically, the proposed methods aim to reduce the computational complexity while maintaining acceptable video quality for syntax transcoding and 2 : 1 downsizing transcoding from H.263 to H.264/AVC standard. In a nutshell, the proposed methods include three components, namely fast intraprediction mode selection, motion vector reestimation and intermode selection, and enhanced rate control for H.264/AVC transcoding. The first two components focus on the most computationally intensive parts of the H.264/AVC standard to speed up the transcoding process, while the third component aims to achieve a better video quality by enhancing the rate control with the side information extracted fromthe precoded video. The experimental results show that the proposed methods can reduce the total encoding time by a factor of 6 and suffer only about 0.35 dB loss in peak-signal-to-noise ratio (PSNR).