共查询到18条相似文献,搜索用时 140 毫秒
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5G超高清视频传输是当前5G应用的重要场景,首先介绍了5G的特点以及媒体应用的场景。详细分析了5G超高清视频传输的技术方案和该技术方案对5G网络的技术要求。提出了两种典型媒体应用场景。最后对5G在新媒体领域的应用进行了展望。 相似文献
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针对超高清视频与5G融合应用遇到的困难,构建一个基于5G通信技术的4K/8K超高清分布式视频处理系统,研究超高清视频开展编解码算法优化、超高清视频5G网络传输需要的大带宽、低时延的QoS质量保障等关键技术,满足5G网络复杂多变场景下多并发超高清视频流的实时处理、传输及显示等方面的应用. 相似文献
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无线视频监控传输技术的研究 总被引:3,自引:0,他引:3
结合无线视频技术在监控系统中的应用需求,通过分析无线视频传输技术,指出当前一些技术的不足之处。针对无线视频传输中带宽资源有限和视频数据量大的问题,研究一种基于带宽-失真模型的无线视频数据传输的控制机制,来避免由于不必要重传而带来的带宽资源浪费,提高系统带宽使用效率,并通过实验对所提机制进行测试,结果表明该机制能有效地降低传输需用的带宽。 相似文献
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常规的物联网应用一般是小流量的M2M应用,传输的数据量很小,原有的2G网络足以实现对这些数据量的支撑。但是,物联网也有大量占用高带宽的应用,如平安城市建设、公共交通监控、应急指挥系统等以视频图像为主的监控业务。本文主要描述了一个基于云平台的物联网专网的开发与设计,给出了系统设计的框架和具体的方案,具有重要的技术参考价值。 相似文献
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5G NSA网络提供了极大的带宽支持,EN-DC技术可以使运营商在5G核心网建设初期,及早地推出5G服务,以缓解某些高带宽需求的应用场景给网络带来的压力.基于多场景业务测试和信令分析,对5G高清视频回传的传统方案和创新方案进行了比较,通过网元配置,实现了5G业务演示,对创新方案进行了验证. 相似文献
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视频信息传输对救灾、应急通信和特殊区域监控有着重要意义,网络的适应性和带宽问题是限制视频监控系统发展的重要因素.无线Mesh网络具有带宽高、易组网等优点,能够提供实时的视频传输服务.首先完成对基于Mesh网络的视频监控系统整体架构设计,通过实验仿真的方法对比几种常用的Mesh网络路由协议性能,根据仿真结果和应用需求,选择AODV作为路由协议方案.然后在DM365硬件平台和嵌入式Linux操作系统平台之上完成视频传感器节点设计.最后对无线Mesh网络多跳带宽性能进行测试,测试结果表明系统可以满足应用需求. 相似文献
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In order to increase the efficiency of mobile video transmission in a 5G network, this paper investigates a cooperative multicast of scalable video using network coding with adaptive modulation and coding over dedicated relay-based cellular networks. Different scalable video layers prefer different protection degrees, and user equipments (UEs) in different locations experience different packet loss rates in wireless networks. Guaranteeing that all UEs experience a certain level of video quality is one of the biggest challenges in scalable video multicast. Using the number of satisfied UEs as a metric, the proposed efficient scalable video multicast based on network-coded cooperation (SVM-NC) scheme, combined with adaptive modulation and coding, enhances the attainable system performance under strict time and bandwidth resource constraints for guaranteed smooth playback. Various simulations were performed for performance evaluation. The proposed scheme ensures that the expected percentage of satisfied UEs approximately achieves the maximum number of UEs in a multicast group by using network-coded cooperation over dedicated relay-based cellular networks. In addition, the peak signal-to-noise ratio metric is asymptotic to the maximum performance of high-resolution video quality offered by service providers. 相似文献
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Yufeng Shan Su Yi Shivkumar Kalyanaraman John W. Woods 《Signal Processing: Image Communication》2009,24(9):718-729
In this paper, we present a two-stage forward error correction (FEC) scheme with an enhanced link-layer protocol especially for multimedia data transmission over wireless LANs. At the application layer, packet-level FEC (stage-one) is added across packets to correct packet losses due to congestion and route disruption. Bit-level FEC (stage-two) is then added to both application packets and stage-one FEC packets to recover bit errors from the link layer. Then at the link layer, header-CRC/FEC is used to enhance protection and to cooperate with the two-stage FEC scheme. The proposed scheme thus provides joint protection across the protocol stack. We explore both its bandwidth efficiency and video performance for the highly efficient and scalable MC-EZBC video codec using the network simulator ns-2. Our results show that the proposed scheme can effectively increase application-layer throughput, reduce both end-to-end transmission delay and application bandwidth fluctuation, and significantly improve video performance. 相似文献
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随着信息化技术的快速发展,5G信息技术在社会各个领域中的应用也越来越广泛。在土地资源管理领域,5G信息技术具有更快的传输速率、更高的带宽、更强的稳定性等优点,能满足土地资源管理信息化建设的需求。此外,5G信息技术还能融合互联网、物联网等技术,为土地资源管理工作提供更多的便利。基于此,文中对5G信息技术在土地资源管理中的应用进行了研究与探索,旨在为相关工作人员提供参考。 相似文献
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Currently, VR video delivery over 5G systems is still a very complicated endeavor. One of the major challenges for VR video streaming is the expectations for low latency that current mobile networks can hardly meet. Network caching can reduce the content delivery latency efficiently. However, current caching schemes cannot obtain ideal results for VR video since it requests the viewport interactively. In this paper, we propose a tiled scalable VR video caching scheme over 5G networks. VR chunks are first encoded into multi-granularity quality layers, and are then partitioned into tiles to facilitate viewport data access. By accommodating the 5G network infrastructure, the tiles are cooperatively cached in a three-level hierarchal system to reduce delivery latency. Furthermore, a quality-adaptive request routing algorithm is designed to cater for the 5G bandwidth dynamics. Experimental results show that the proposed scheme can reduce the transmission latency over conventional constant bitrate video caching schemes. 相似文献
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视频流传输具有带宽高、周期长的特点,使网络带宽成为了制约视频流点播应用发展的主要因素.本文针对现有网络技术条件,充分利用客户端I/O带宽、本地缓存及网络带宽资源,设计了一个适用于大规模点播应用的基于代理的分布式视频点播传输策略.该策略中各本地网络设有一视频流代理服务器用于保存部分视频的部分内容,并按动态批处理的方式来接纳并服务请求用户.视频传输时,服务器与代理端之间采用单播传输机制,在代理与客户端之间采用单播与多播相结合的方式.实验表明该策略可以大大减少对骨干网络带宽的需求,并能为客户端提供理论上的零启动延时服务. 相似文献