基于SPICE协议的视频性能优化与改进  

Optimization and Improvement of Virtual Video Performance Based on SPICE Protocol

作　　者：杨飞[1] 朱志祥 梁小江 

机构地区：[1]西安邮电大学,陕西西安710061 [2]陕西省信息化工程研究院,陕西西安710061

出　　处：《计算机技术与发展》2016年第12期73-76,共4页Computer Technology and Development

基　　金：陕西省信息化技术研究项目(2015-002);西安邮电大学青年教师基金项目(401-1201)

摘　　要：为了解决基于SPICE协议的虚拟桌面在播放视频时出现的画面延迟和跳帧现象,提出了一种将视频流占用网络带宽的比例因子与反馈丢帧算法相结合的策略。该方案能够根据不同的网络带宽比例因子选取不同的视频反馈丢帧算法,能够有效地减轻网络带宽对基于SPICE协议的虚拟桌面视频传输带来的延迟和抖动问题,同时也可以有效减少基于SPICE协议的虚拟桌面的视频流在网络传输过程中的丢帧率。通过对虚拟桌面的视频流在网络传输过程中的帧、帧数和码率的采样和优化,证明优化后视频流的帧、帧数和码率波动相对平稳,降低了视频流跳帧的概率和画面的延迟。因此,该方案能够有效地解决基于SPICE协议的虚拟桌面在视频播放中的画面延迟和跳帧现象。In order to solve the phenomena of screen delay and skip frames when playing video on virtual desktop based on SPICE proto- col, a scheme is proposed which combines the scale factor of video streams taking up the network bandwidth and the dropping algorithm of video frames. It selects a different dropping strategy of video frames according to the scale factor of network bandwidth, which can effectively reduce the delay and jitter of network bandwidth for transmitting video streams based on SPICE protocol, and also the dropping rote of video frames in the network. Then, through collection and optimization of the video frame, frames and bit rate in video streams based on SPICE protocol, it is shown that the video frame, frames and bit rate are relatively stable after optimizing the video streams, reduction of probability of skip frames for video stream and delay of image. Therefore, it proves that this design can effectively solve the phenomena of screen delay and skip frames when playing vides on virtual desktop.

关 键 词：虚拟桌面 延迟 跳帧 丢帧 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]