电信科学 ›› 2011, Vol. 27 ›› Issue (9): 111-114.doi: 10.3969/j.issn.1000-0801.2011.9.029

• 研究与开发 • 上一篇    下一篇

基于3G技术的无线视频传输系统研究

毛舟扬1,蒋维2,孙晓杰2,孟利民2   

  1. 1 浙江工业大学教育科学与技术学院 杭州 310023
    2 浙江工业大学信息工程学院 杭州 310023
  • 出版日期:2011-09-15 发布日期:2017-06-22
  • 基金资助:
    2010年度浙江省大学生科技创新活动计划资助项目

Design and Implementation of Wireless Video Transmission System

Zhouyang Mao1,Wei Jiang2,Xiaojie Sun2,Limin Meng2   

  1. 1 Education Scientific College，Zhejiang University of Technology，Hangzhou 310023，China
    2 College of Information Engineering，Zhejiang University of Technology，Hangzhou 310023，China
  • Online:2011-09-15 Published:2017-06-22

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摘要：

设计并实现了一个基于RFC通用标准的H.264视频流实时传输系统。为了克服无线信道高误码、低带宽等不利因素，本文提出了通过cdma2000 EV-DO下的UDP／RTP虚拟链路保证实时传输，同时为了弥补AIMD算法的不足，采用Gilbert信道模型估算有效带宽，并通过预测带宽调整发送速率。结果显示，本系统由于引入了RTCP反馈机制，在网络出现堵塞后会自动降低视频发送的帧率，从而保证视频的实时传输。

关键词: H.264, EV-DO, RTP, RTCP

Abstract:

A real-time H.264 video stream transmission system that based on standard RFC is designed and implemented in this paper. In order to overcome the adverse factors as high bit error and low bandwidth through the wireless channel，this paper proposes UDP／RTP virtual links that under the cdma2000 EV-DO to ensure real-time transmission. At the meantime，in order to make up the lack of AIMD algorithm，this paper uses Gilbert channel model to estimate the effective bandwidth，and adjusts the sending rate by predicting the bandwidth. The results show that when the network congestion occurs，the system will automatically reduce the video frame rate to ensure real-time video transmission，since the RTCP feedback mechanism is added.

Key words: H.264, EV-DO, RTP, RTCP

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