[1]雷启明,周利平.主动流媒体编码转换机制研究[J].四川师范大学学报(自然科学版),2008,(06):770.
 LEIQim ing,ZHOU Liping.The Research ofActiveMedia TranscodingMechanism[J].Journal of SichuanNormal University,2008,(06):770.
点击复制

主动流媒体编码转换机制研究()
分享到:

《四川师范大学学报(自然科学版)》[ISSN:1001-8395/CN:51-1295/N]

卷:
期数:
2008年06期
页码:
770
栏目:
技术研究及其它
出版日期:
2008-11-01

文章信息/Info

Title:
The Research ofActiveMedia TranscodingMechanism
作者:
雷启明 1 周利平 2
1.乐山师范学院计算机科学与技术系,四川乐山614001; 2.四川大学计算机学院,四川成都610064
Author(s):
LEIQiˉm ing 1 ZHOU Liˉping 2
1.Department ofComputer Science and Technology,Leshan Teachers College,Leshan614000,Sichuan; 2.College ofComputer,Sichuan University,Chengdu610065,Sichuan
关键词:
编码转换流媒体主动网络
Keywords:
TranscodingMultimediaActive network
分类号:
TP393
文献标志码:
A
摘要:
扩展了主动流媒体编码转换机制,该机制能进一步充分利用主动网络技术赋予网络的可编程、可计算的能力,除了只为同一组播内容建立一棵组播树外,组播源只发送一个最高质量的流媒体编码版本,在主动节点进行灵活的数据编码转换以满足组播用户的不同需求.该机制适用于任何种类流媒体的组播传输,不同的只是流媒体编码转换的复杂性和具体的编码转换过程.对该机制进行了大量的仿真实验,在协议设计和性能方面都予以了分析.
Abstract:
In this paper,an extended activemedia transcodingmechanism is described which takes good advantages of the capaˉbility of programming and computing of active network.Only onemulticast tree is established and only one version of themedia needs to be sent to perform transformations of the original data to the requested versions in intermediate nodes of the tree.This advancedmulˉticast service can be used to stream awide variety of streamingmedia content.Thismechanism can be used to support either voice,auˉdio or video content.The only difference lies in the implementation and the complexity of the respective transcoding processes.And many experiments to analyze the performance of the mechanism are presented.

参考文献/References:

[1]Duysburgh B,LambrechtT,De Turck F,et al.An active networking based service formedia transcoding in multicast sessions[J].IEEE Transactions on Systems,Man,and Cybernetics,PartC:Applications and Reviews,2004,34(1):19ˉ31.
[2]G.711.Pulse CodeModulation(PCM)ofVoice Frequencies[S].
[3]G.726.40,32,24,16kbit/s Adaptive Differential Pulse CodeModulation(ADPCM)[S].
[4]G.727.5ˉ,4ˉ,3ˉ,and2ˉBits Sample Embedded Adaptive Differential Pulse CodeModulation(ADPCM)[S].
[5]G.728.Coding of Speech at16kbit/sUsing LowˉDelay Code Excited Linear Prediction[S].
[6]G.729.Coding of Speech at8kbit/sUsing Conjugate Structure AlgebraicˉCodeˉExcited LinearˉPrediction(CSˉACELP)[S].
[7]谢希仁.计算机网络[M].北京:电子工业出版社,1999:180ˉ181.
[8]UCB/LBL/VINT.The network simulatorˉnsˉ2[DB/OL].[2008ˉ6ˉ15].http://www.isi.edu/nsnam/ns.

备注/Memo

备注/Memo:
收稿日期:2008 - 09 - 11 基金项目:863项目基金(2002AA144020)和四川省青年软件创新工程基金(04HJ027ˉ027)资助项目作者简介:雷启明(1949ˉ),男,副教授,主要从事计算机网络和数据库的研究
更新日期/Last Update: 2009-01-11