摘要： 构建了一个对于转码后的视频进行客观评价的构架。实验框架由主机端软件、特定传输带宽的无线网络、数字媒体适配器、VQM 软件、主观视频质量评价系统等组成。原始视频信号经过主机端软件进行转码处理,通过一个特定带宽的无线网络传输后.到达数字媒体适 配器,再通过视频收集卡将此时的视频采集到PC,在该PC上将此目标码流和原始码流输入VQM应用软件,同时配合一个主观视频质量评价系 统对VQM的参数进行适当的调整,确定出带宽条件下的特定的评测参数,用此方法可以得到不同带宽下的评测参数。将此特定参数与特定 带宽相结合。就可以衡量转码并经特定带宽的无线传输后的视频质量。实验以实际项目中应用的特定码流,由VQM软件测得多组数据,得 出了适当的评测参数。

关键词: 视频客观评价, 无线传输, 转码, VQM, 数字家庭

Abstract: Build an objective video quality evaluation framework. The experience device consists of host software, specified bandwidth wireless network, digital media adapter, VQM software, subjective video quality evaluation system, etc. Source video is processed by transrating,then transmit the specified bandwidth wireless network to digital media adapter, video collection card collects the video and put it to PC, until now, the video is the processed video, put the processed video and the source video to VQM which is installed on PC, as the assistant of subjective video quality evaluation system, it can modify the parameter of VQM to adapt to the condition of specified bandwidth, according to this method, it can get the evaluation parameters of different bandwidth.Using this framework it can measure quality of video after transmitting through the specified bandwidth wireless network. In this experiment, use the appointed source video and get some groups of data by VQM software,finally achieve the suitable evaluation parameters.

中图分类号: 

• TN919.8