摘要
针对目前云桌面协议存在的因分块机制引起协议视频播放画面不流畅、带宽占用高等问题,在独立计算环境简单协议(SPICE)的基础上提出了一种视频区域侦测算法(VRDA)。首先在云桌面协议播放视频的过程中侦测识别视频播放区域,然后截取视频播放区域的图像为一块完整的视频帧进行处理,最后使用动态图像专家组视频压缩标准(MPEG4)视频压缩算法替换原压缩效率不高的运动静止图像压缩技术(MJPEG)压缩解压视频帧;同时,提出帧期望与实际显示时间差(DAETD)指标作为实验评价指标,来验证改进后SPICE的视频播放流畅度,并测试带宽占用情况。实验表明,所提算法有效提高了视频流畅度,减少了网络带宽占用。
At present, there are some problems when video is played on virtual desktop protocol with partitioning mechanism, such as the video is not smooth and the bandwidth is highly occupied. In this paper, a Video Area Detection Algorithm（ VRDA） was proposed based on virtual desktop protocol, called SPICE（ Simple Protocol for Independent Computing Environment）. Video regions were detected in the process of playing video on virtual desktop protocol, each of which was intercepted as a complete video frame, and decompressed by MPEG4（ Moving Pictures Experts Group-4） video compression algorithm instead of the original compression algorithm MJPEG（ Motion JPEG） with lower efficiency. A evaluation metric named DAETD（ Difference between Actual and Expected Display Time） was proposed to test the fluency of the improved SPICE, meanwhile, the bandwidth consumption of SPICE was also tested. The experimental results show that the proposed algorithm can improve the video fluency and reduce the network bandwidth consumption.
作者
侯文慧
王俊峰
HOU Wenhui;WANG Junfeng(College of Computer Science,Siehuan University,Chengdu Siehuan 610065,China)
出处
《计算机应用》
CSCD
北大核心
2018年第5期1463-1469,1487,共8页
journal of Computer Applications
基金
国家重点研发计划项目(2016QY06X1205
2016YFB0800605)
国家自然科学基金资助项目(91438120
91338107
91438119)
四川省重点研发计划项目(17ZDYF2583)~~
关键词
云桌面
独立计算环境简单协议
视频区域检测
MPEG4
virtual desktop
Simple Protocol for Independent Computing Environment （SPICE）
video region detection
Moving Pictures Experts Group-4 （MPEG4）
