计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
20期
71-76,135
,共7页
IPTV服务%用户体验质量(QoE)%网络服务质量(QoS)
IPTV服務%用戶體驗質量(QoE)%網絡服務質量(QoS)
IPTV복무%용호체험질량(QoE)%망락복무질량(QoS)
IPTV service%Quality of Experience(QoE)%Quality of Service(QoS)
IPTV是一种基于Internet的多媒体网络服务，由于Internet本身的不可靠性，使其在网络传输过程中无法保证服务质量。为了实时定量评估IPTV服务质量，提出了一种基于IPTV的用户体验评估模型，通过建立从网络服务质量QoS到用户体验质量QoE的映射关系，借助QoS测量技术，以实现针对QoE的在线评估。实验建立IPTV仿真平台，模拟真实网络环境下IPTV媒体流传输的整个过程，实现网络损伤QoS可控和QoE可测。针对不同编码和不同内容的视音频，分别建立独立的QoE评估模型。同时考虑到模型对数据精度和计算速度的需求，给出优化的QoE评估模型。实验结果表明，该评估模型与实际用户体验具有较高的拟合度。
IPTV是一種基于Internet的多媒體網絡服務，由于Internet本身的不可靠性，使其在網絡傳輸過程中無法保證服務質量。為瞭實時定量評估IPTV服務質量，提齣瞭一種基于IPTV的用戶體驗評估模型，通過建立從網絡服務質量QoS到用戶體驗質量QoE的映射關繫，藉助QoS測量技術，以實現針對QoE的在線評估。實驗建立IPTV倣真平檯，模擬真實網絡環境下IPTV媒體流傳輸的整箇過程，實現網絡損傷QoS可控和QoE可測。針對不同編碼和不同內容的視音頻，分彆建立獨立的QoE評估模型。同時攷慮到模型對數據精度和計算速度的需求，給齣優化的QoE評估模型。實驗結果錶明，該評估模型與實際用戶體驗具有較高的擬閤度。
IPTV시일충기우Internet적다매체망락복무，유우Internet본신적불가고성，사기재망락전수과정중무법보증복무질량。위료실시정량평고IPTV복무질량，제출료일충기우IPTV적용호체험평고모형，통과건립종망락복무질량QoS도용호체험질량QoE적영사관계，차조QoS측량기술，이실현침대QoE적재선평고。실험건립IPTV방진평태，모의진실망락배경하IPTV매체류전수적정개과정，실현망락손상QoS가공화QoE가측。침대불동편마화불동내용적시음빈，분별건립독립적QoE평고모형。동시고필도모형대수거정도화계산속도적수구，급출우화적QoE평고모형。실험결과표명，해평고모형여실제용호체험구유교고적의합도。
IPTV is a new multimedia service over the Internet. Compared with cable TV and digital TV, the quality of IPTV ser-vice is more likely to be affected by the real-time impairment in network transmission because the Internet is a best-effort net-work which cannot guarantee the quality. In this paper, the problem of mapping from the objective QoS value to the subjective QoE value is focused on, to achieve QoE real-time measurement by monitoring QoS on the Internet. In this research, IPTV simu-lation platform is designed to simulate the whole process from ICP to end users which containing the network impairment. Through the testbed, QoE evaluation model is established to map QoS to QoE for different codec and different content. After that, taking into account the demand of accuracy and speed, an optimized and unified QoE evaluation model is provided to fit the need of real-time measurement. Result shows that QoE evaluation model has a high relevance to actual result.
