文档介绍：摘要
随着网络的不断发展,IPTV逐渐取代了单向广播的有线电视和数字电视。然而,相对于有线电视和数字电视来说,IPTV更容易因为网络参数的实时变化而使得播放质量受到影响。为了定量确定该影响的大小,本课题对网络性能与IPTV用户观看满意程度之间的关系展开研究。设计IPTV仿真实验平台,仿真真实网络环境下IPTV媒体流在传输过程中所受到的网络损伤,并对客户端转储得到的损伤IPTV媒体流进行用户体验质量的评价。通过实验,为不同编码方式、不同视音频内容的IPTV建立网络服务质量QoS与用户体验质量QoE之间的映射模型,并尝试将不同编码方式和视音频内容的映射模型进行统一。考虑到实用性的需要,对该模型的数据精度和计算速度进行需求分析,并给出精度和算法的优化方案和优化模型。最后,针对不同环境下对时间和精度的不同需求,给出了建议的模型使用方案。
关键词:IPTV;用户体验质量(QoE);网络服务质量(QoS);QoE映射模型
Abstract
With the continuous development of work, IPTV gradually replaced the one-way cable TV and digital TV broadcasting. However, compared with cable TV and digital TV, IPTV playback quality is more likely to be affected by the real-time changes work parameters. In order to quantitatively measure the degree of the impact, a study is conducted to show the relationship between work performance and the viewer's satisfaction. We designed an IPTV simulation platform to simulate the work environment and obtain an impaired dump file damaged by work. Through the experiment, we established mapping models between work quality of service (QoS) and the user's quality of experience (QoE) for different coding and different content. And then try to unify them to one mapping model. Taking into account the needs of accuracy and speed, we optimized the accuracy and algorithm of the model. Finally, we provided the suggested use of models to satisfied different situation.
Keywords: IPTV; Quality of Experience (QoE); Quality of Service (QoS); QoE Mapping Model
目录
1 绪论 1
研究背景及意义 1
研究背景 1
研究目的及意义 1
国内外研究现状 2
QoE与QoS的含义 2
视频和音频QoE评价现状 3
IPTV的QoE评测现状 6
研究内容及关键技术 9
研究内容 9
关键技术 9
论文结构 9
2 实验工具及相关原理 10
网络仿真工具 10
VLC流媒体传输及播放工具 11
QoE评测工具 11
视频评测-bvqm 11
音频评测-pesq 11
模型拟合程度评价标准 11
3 实验环境 12
搭建实验仿真平台 12
IPTV实验平台结构 12
网络拓扑及软件部署 13
确定实验参数 14
网络损伤参数选取 14
视音频编码参数选取 15
视音频内容来源选取 16
网络传输协议选取 17
实验数据采集及评价过程 18
实验流程 18