| Video transcoding technology in IPTV applications | |
| Wang Fuzhong ; Dai Qionghai ; Ding Rong | |
| 2010-05-06 ; 2010-05-06 | |
| 关键词 | Practical/ digital video broadcasting direct broadcasting by satellite Internet IP networks motion estimation search problems transcoding video coding/ video transcoding technology IPTV applications Internet protocol TV digital video broadcasting - satellite DVB-S transcode MPEG moving picture experts group MPEG-4 video real time bandwidth limits motion reestimation algorithm motion vector lookup table predictive motion vector field adaptive search technique peak signal-to-noise ratio Internet bandwidths/ B6135C Image and video coding B6210L Computer communications B6420 Radio and television broadcasting C5260D Video signal processing C5620W Other computer networks |
| 中文摘要 | An IPTV (Internet protocol TV) application scheme was developed to broadcast DVB-S (digital video broadcasting - satellite) video live to users with different Internet bandwidths. Motion re-estimation was used to transcode MPEG (moving picture experts group)-2 video to lower bitrate MPEG-4 video real time to avoid bandwidth limits. The motion re-estimation algorithm builds an inverse MV (motion vector) lookup table using the overlap area to speed up the MV search and estimates the MV based on the neighbor macroblock's MV. The algorithm efficiently improves the transcoding while maintaining video quality. Simulations show that the video transcoding process uses 40% less encoding time than the PMVfast (predictive motion vector field adaptive search technique) algorithm with the PSNR (peak signal-to-noise ratio) reduced by less than 0.3 dB. |
| 语种 | 中文 ; 中文 |
| 出版者 | Tsinghua Univ. Press ; China |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/9214]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Wang Fuzhong,Dai Qionghai,Ding Rong. Video transcoding technology in IPTV applications[J],2010, 2010. |
| APA | Wang Fuzhong,Dai Qionghai,&Ding Rong.(2010).Video transcoding technology in IPTV applications.. |
| MLA | Wang Fuzhong,et al."Video transcoding technology in IPTV applications".(2010). |
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