共查询到18条相似文献,搜索用时 296 毫秒
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IPTV嵌入式软探针监测系统通过获取IPTV终端节点的关键指标,将指标发送到集中监测平台,实现端到端的质量监测、告警及诊断功能。基于此,探讨利用软探针监测系统提升视频业务流量利用率、释放无效流量占用网络带宽的方法。 相似文献
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视频质量是IPTV服务的关键,其好坏直接决定了IPTV业务的服务质量.本文首先介绍了视频质量测评模型的分类,之后分别针对几类测评模型的应用分析其国内外发展现状.同时,详细描述了IPTV用户体验质量(QoE)的基本概念以及IPTV中影响QoE的因子.最后提出现有IPTV质量测评模型的不足及发展研究方向. 相似文献
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随着国内IPTV业务的快速发展,多媒体研究集团(MRG)完成的一项研究评结果证实视频质量对IPTV的发展和成功具有关键的作用,IPTV视频质量是导致客户投诉和客户流失的重要因素。目前对全国IPTV运营商而言,由于IPTV是承载在IP网上的视频业务,不管是的网络结构还是IPTV平台技术都相对复杂,所以导致IPTV视频质量故障难以定位和处理。本文就是针对IPTV视频质量故障定位及处理提出了一套比较完整的解决方案,以供全国IPTV技术人员参考,由于作者水平有限,文中不足之处敬请指正。 相似文献
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2005年,IPTV可以说是国内通信业最热的词之一,当人们热衷于新技术、新业务的讨论和试点的时候,恐怕很少有人静下心来思考一下如何去测试和评估不同的IPTV解决方案,现有的网络设备是否已经适用于IPTV新业务的开展,针对IPTV的测试与以往的网络测试有何不同……而这些测试往往是一项新技术、新业务能否在市场上取得成功的关键。日前,思博伦通信全球巡回TriplePlay测试研讨会在北京举行,该巡回研讨会于2005年9月启动,已跨越爱尔兰、伦敦、瑞典、芬兰、荷兰、巴黎、上海等地区。此次研讨会阐述了语音与视频质量的关键指标以及如何测试语… 相似文献
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IPTV业务的实际运营中,如何保证和监测端到端的业务质量是运营商关注的主要问题.本文首先介绍了IPTV业务质量的定义和业务质量模型,并从运营商角度提出了业务质量监测的需求.之后介绍了目前IPTV质量监测领域的技术、标准和产业发展状况,最后提出了在IPTV业务网络中部署端到端监测系统的技术方案. 相似文献
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IPTV视频质量评价技术综述 总被引:1,自引:0,他引:1
IPTV作为数字视频的一个重要业务,其提供的视频质量对于用户来说非常重要。如何对IPTV系统提供的数字视频质量进行评价是近年来研究的热点和难点。本文介绍了视频质量主观评价方法和客观评价方法的研究进展,分析了无参考度量技术,对比各种算法、视频质量评价的标准化状况,总结了IPTV视频质量评价的难点和研究方向。 相似文献
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IPTV是基于宽带高速IP网的流媒体服务,服务质量对于IPTV的成功是至关重要的.从IPTV的视频编码标准和内容分发技术等几方面探讨IPTV中的服务质量保证策略. 相似文献
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Internet protocol television (IPTV) service depends on the network quality of service (QoS) and bandwidth of the broadband service provider. IEEE 802.16j mobile multihop relay Worldwide Interoperability for Microwave Access networks have the opportunity to offer high bandwidth capacity by introducing relay stations. However, to actually satisfy QoS requirements for offering IPTV services (HDTV, SDTV, Web TV, and mobile TV) for heterogeneous users' requests, providers must use a video server for each IPTV service type, which increases the network load, especially bandwidth consumption and forwarding time. In this paper, we present a solution for forwarding IPTV video streaming to diverse subscribers via an 802.16j broadband wireless access network. In particular, we propose a new multicast tree construction and aggregation mechanism based on the unique property of prime numbers. Performance evaluation results show that the proposed scheme reduces both bandwidth consumption and forwarding time. 相似文献
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首先对IPTV马赛克、卡片等视频业务质量问题的原因进行深入分析,并与现有常用的IPTV监测方案对比,提出了一种创新的基于MPEG-TS层和RTP层QoS参数关联的IPTV业务质量分析与故障点定位方法.运维实践表明,该方法实施简便、经济有效,具有较强的推广价值. 相似文献
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Maintaining the quality of videos in resource-intensive IPTV services is challenging due to the nature of packet-based content distribution networks (CDN). Network impairments are unpredictable and highly detrimental to the quality of video content. Quality of the end user experience (QoE) has become a critical service differentiator. An efficient real-time quality assessment service in distribution networks is the foundation of service quality monitoring and management. The perceptual impact of individual impairments varies significantly and is influenced by complex impact factors. Without differentiating the impact of quality violation events to the user experience, existing assessment methodologies based on network QoS such as packet loss rate cannot provide adequate supports for the IPTV service assessment. A discrete perceptual impact evaluation quality assessment (DEQA) framework is introduced in this paper. The proposed framework enables a real-time, non-intrusive assessment service by efficiently recognising and assessing individual quality violation events in the IPTV distribution network. The discrete perceptual impacts to a media session are aggregated for the overall user level quality evaluation. With its deployment scheme the DEQA framework also facilitates efficient network diagnosis and QoE management. To realise the key assessment function of the framework and investigate the proposed advanced packet inspection mechanism, we also introduce the dedicated evaluation testbed—the LA2 system. A subjective experiment with data analysis is also presented to demonstrate the development of perceptual impact assessment functions using analytical inference, the tools of the LA2 system, subjective user tests and statistical modelling. 相似文献
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4G蜂窝网的频谱分配效率难以负担日益增长的移动IPTV服务与大视频流数据,为此提出了蜂窝网支持移动IPTV服务的优化方案,在保持传统语音电话质量的前提下,提高了移动IPTV服务的性能.首先,为语音电话分配较高的频率分配优先级以维护语音电话的QoS(Quality of Service);然后,采用软频谱复用技术来增强频谱的效率,并降低相邻蜂窝之间的频谱干扰;最终,设计了动态频谱分配算法,对相邻蜂窝间边缘频带的频谱分配进行协调与优化,进一步地提高了频谱利用率.仿真结果显示,本频谱分配算法在不降低语音电话服务质量的前提下,明显地提高了移动IPTV服务的性能. 相似文献