视频质量与监测的相关问题研究

发布时间：2018-05-19 23:07

本文选题：视频质量衡量 + 视频监测体系　；参考：《北京交通大学》2017年硕士论文

【摘要】：随着用户可享受到的网络带宽越来越大,我们的生活中涌现出了许多以超高清视频为主的大带宽业务。在视频业务发展的同时,我们也需要有一个良好的衡量业务质量以及监测业务的体系,来助力其发展。其中,视频质量衡量体系,主要是采用主客观相结合的方法来制定。而视频监测体系是依据质量衡量体系中的客观参量的选取而制定。本论文围绕着视频质量与监测的主题,进行的主要工作和具体研究成果如下:(1)论文将近两年刚提出的U-vMOS标准体系,用于衡量视频业务的质量。并以超高清4K视频以及其他常见的视频为主,计算了它们的U-vMOS得分。且所得结果能正确体现出超高清视频的优势。(2)论文以U-vMOS得分为参考依据,通过计算指出要想更好地发展高质量的超高清视频业务就需百兆以上的带宽。并通过结合作者在工程实践中参与的1G-EPON/G-PON的现网ODN链路测试,指出目前现网不能满足较多用户同时获取百兆以上带宽的需求。(3)论文针对当下的监测体系,深入分析了有关探针监测的内容。其中,切换台和加载所对应的时长是探针监测时必须上报的内容,作为衡量视频业务质量的参量。由于利益的驱使,一些作弊者经常利用探针上报时的漏洞,使上报时长变小。论文针对这一情况,提出了一套基于监测作弊的解决方法。该监测作弊的方法中采用了视频采集卡和MATLAB编程。其中,视频采集卡可将电视画面转到电脑上,MATLAB编程采用了基于RGB和亮度的相关性算法来判断是否存在作弊行为。该方法在一定程度上代替了之前为防止作弊而进行的手动时长测试,大大减少了人力上的消耗,也完善了当下的监测体系。
[Abstract]:With the increasing network bandwidth that users can enjoy, many large bandwidth services are emerging in our life, which mainly focus on ultra high definition video. With the development of video service, we also need a good system to measure service quality and monitor service. Among them, the video quality measurement system is mainly developed by combining subjective and objective methods. The video monitoring system is based on the selection of objective parameters in the quality measurement system. This paper focuses on the theme of video quality and monitoring. The main work and specific research results are as follows: 1) the U-vMOS standard system proposed in this paper is used to measure the quality of video service. The U-vMOS score is calculated by using Ultra High HD 4 K video and other common video. And the results can correctly reflect the advantage of UHD video.) based on the U-vMOS score, the paper points out that to better develop high quality UHD video services, it needs more than 100 megabytes of bandwidth. Combined with the ODN link test of 1G-EPON/G-PON in engineering practice, it is pointed out that the current network can not meet the needs of more users to obtain more than 100 megabytes of bandwidth at the same time.) this paper aims at the current monitoring system. The contents of probe monitoring are analyzed. The length of time corresponding to the switching station and loading is the content that must be reported when the probe is monitored as a parameter to measure the quality of video service. Driven by profit, some cheaters often use the loopholes in the probe to make the reporting time smaller. In order to solve this problem, a set of solutions based on monitoring cheating is put forward in this paper. The method of monitoring cheating adopts video capture card and MATLAB programming. Among them, the video capture card can transfer the TV picture to the computer and adopt the correlation algorithm based on RGB and brightness to judge whether there is cheating or not. To some extent, this method replaces the manual time test in order to prevent cheating, which greatly reduces the human consumption and improves the current monitoring system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.41

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