摘要
提出了一种基于Evalvid的H.264视频传输服务质量(QoS)评估改进系统,该系统在Ns-2网络仿真器上运行,实现了对丢包率、延时以及延迟抖动等QoS参数的测量,并利用Evalvid工具实现了对接收端视频PSNR值的计算。系统采用了基于帧类型的区分优先级的传输策略,实验结果表明,它能使传输后的视频PSNR值得到明显提高。
The improvement of QoS evaluation framework for H.264 video based on Evalvid is introduced. The system is run on Ns-2 simulator to measure QoS parameters, like loss rate, delay, jitter etc.. By using Evalvid tool, the PSNR of received video is calculated. And the system adopts a Diffserv transmission strategy based on frame type. Experimental results show that this strategy can achieve higher PSNR.
出处
《电视技术》
北大核心
2007年第10期59-61,共3页
Video Engineering
基金
国务院侨办科研基金(No:06QZR03)
