无线多跳网络视频流的联合源编码优化算法
由于网络媒体的共享性和不可靠性,对无线多跳网络中视频流的支持面临更大的技术挑战。研究了视频流优化问题并提出了一种联合源网络编码机制。该机制将视频流的源分段,并分为不同的世代,以达到视频流质量的最大化。算法首先分析世代规模对网络性能如源速率、编码效率和解码延时的影响,然后为了使源速率较大,在源端产生较多数据分组,并设计一种联合网络编码机制确定各个中间节点发送到网络中分组的最佳数量,使视频流的质量达到最高。仿真实验结果表明,在世代规模合适的情况下,使用所提联合源编码机制可以增强无线多跳网络视频流的性能。...
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| Published in | 计算机应用研究 Vol. 32; no. 4; pp. 1203 - 1206 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
惠州学院计算机科学系,广东惠州,516000%惠州学院电子科学系,广东惠州,516000%华南理工大学自动化科学与理工学院,广州,510641
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-3695 |
| DOI | 10.3969/j.issn.1001-3695.2015.04.057 |
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| Summary: | 由于网络媒体的共享性和不可靠性,对无线多跳网络中视频流的支持面临更大的技术挑战。研究了视频流优化问题并提出了一种联合源网络编码机制。该机制将视频流的源分段,并分为不同的世代,以达到视频流质量的最大化。算法首先分析世代规模对网络性能如源速率、编码效率和解码延时的影响,然后为了使源速率较大,在源端产生较多数据分组,并设计一种联合网络编码机制确定各个中间节点发送到网络中分组的最佳数量,使视频流的质量达到最高。仿真实验结果表明,在世代规模合适的情况下,使用所提联合源编码机制可以增强无线多跳网络视频流的性能。 |
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| Bibliography: | 51-1196/TP GAO Lei, CAO Jian-zhong , LIAO Qi-liang （1. a. Dept. of Computer Sciences, b. Dept. of Electronic Science, Huizhou University, Huizhou Guangdong 516000, China; 2. School of Automation Science ＆ Engineering, South China University of Technology, Guangzhou 510641, China） Due to the shared and unreliable characteristics of network media,supporting video streaming over wireless multihop networks faces greater technical challenges. This paper analyzed the stream optimization problem and proposed a joint source network coding scheme. The proposed scheme segmented the streaming source into generations in order to maximize the video streaming quality. The optimization algorithm firstly analyzed the influence of generation size on the network performance such as the source rate,the coding efficiency and the decoding delay. Then it generated many data packets at the source in order to get a fast source rate,and simultaneously designed the network coding strategies to decide the best number of packets that the |
| ISSN: | 1001-3695 |
| DOI: | 10.3969/j.issn.1001-3695.2015.04.057 |