| 数字电视传输流循环播放码流预处理的研究与实现 |
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| 引用本文： | 张宝菊,贾萍,吕达夫,李桂苓.数字电视传输流循环播放码流预处理的研究与实现[J].天津大学学报(自然科学与工程技术版),2006,39(1):124-128. |
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| 作者姓名： | 张宝菊 贾萍 吕达夫 李桂苓 |
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| 作者单位： | [1]天津大学电子信息工程学院,天津300072 [2]天津师范大学物理与电子信息学院,天津300074 |
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| 摘 要： | 数字电视传输流在循环播放时需要实时更新节目时钟基准、音视频解码时间标签和显示时间标签，接收机（机顶盒）才能正确解码．为此，提出并实现了通过对数据流进行预处理生成报告文件，循环播放时再按报告文件实时更新定时参数的算法、解决了多个传输流文件之间以及单个传输流文件循环播放时头尾的无缝粘接．使机顶盒接收、解码、系统时基、声音、图像以及声音与图像之间均能良好同步．
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| 关 键 词： | 数字电视传输流 预处理 节目时钟基准 循环播放 |
| 文章编号： | 0493-2137（2006）01-0124-05 |
| 收稿时间： | 2004-12-15 |
| 修稿时间： | 2004-12-152005-01-28 |
Realization of Pretreatment for DTV TS Transported in Cycle |
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| ZHANG Bao-ju,JIA Ping,L Da-fu,LI Gui-ling.Realization of Pretreatment for DTV TS Transported in Cycle[J].Journal of Tianjin University(Science and Technology),2006,39(1):124-128. |
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| Authors: | ZHANG Bao-ju JIA Ping L Da-fu LI Gui-ling |
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| Institution: | 1. School of Electronic Information Engineering ,Tianjin University, Tianjin 300072, China; 2. College of Physics and Electronic Information Science ,Tianjin Normal University, Tianjin 300074, China |
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| Abstract: | When the digital television transport stream(DTV TS) is transported in cycle, it is necessary to renew the program clock reference, decoding time stamp and presentation time stamp of audio and video in time in order that the set top box ( STB) can decode correctly. This paper suggests an algorithm that generates report file by dealing with the TS in advance, and then renews the related parameters according to the report file when the DTV TS is transported in cycle. This algorithm solves the problem of how to realize the seamless bonding of several TS files or one loop-played TS file. STB can receive TS and decode with proper synchronization, which can also be obtained in system time reference, audio, video, and between audio and video. |
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| Keywords: | digital television transport stream pretreatment program clock reference cyclic transport |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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