摘要
为保障和提高时变无线信道下实时视频传输的服务质量,设计和实现了嵌入式端到端无线可伸缩实时视频传输系统。在视频传输过程中,可伸缩控制模块基于改进的加增乘减(AIMD)算法根据无线信道状态实时地进行传输速率预测;同时采用空间伸缩和质量伸缩联合可伸缩方案匹配最佳的视频传输参数,由传输控制协议(TCP)进行可靠反馈。测试结果表明,该系统能有效保证时变无线环境下的实时视频传输的质量。
In order to guarantee and improve the QoS of real-time video delivery over time-varying wireless channel,an end-to-end wireless scalable real-time video transmission system is designed and implemented. In the process of video transmission,the scalability control module firstly predicts the suitable service data rate based on proposed adaptive rate control algorithm, and then determines the optimal video transmission parameters by selecting scalable mode, which is spatial scalability or SNR scalability. The video transmission parameters are feedback through TCP link. Results show that the system can provide effective real time video delivery over time-varying wireless channel with satisfactory perceptual quality.
出处
《电子测量技术》
2013年第1期115-119,共5页
Electronic Measurement Technology
基金
国家科技重大专项基金(2010ZX03005-001)
天津市科技兴海(KJXH2011-2)资助项目
