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Design and Implementation of Wireless Video Server Based on the 3G Communication Network

Author: XieNa
Tutor: TianBin；ZhangFang
School: Xi'an University of Electronic Science and Technology
Course: Software Engineering
Keywords: Wireless video HARQ Video compression technology
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 165
Quote: 2
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Abstract


Video server as an important source of access to information , has penetrated into the military, transportation , security and other areas of the national economy and the people's livelihood . Communication technology to carry video services also experienced enormous changes, has now entered the 3G era . Fast transfer of huge amount of video information , to support high compression technology and high-speed communications technology . This paper, the design and implementation of a 3G communications technology - based wireless video server . The video server to the distal end camera input analog video through the A / D converter is converted to a digital video signal , the digital video signal based on the H.264 standard video compression , resulting in a high compression ratio using TI dedicated multimedia processing chip DM6446 compressed stream , high compression code spread output to final adoption of 3G wireless communication module . For to overcome 3G wireless network , multipath fading , burst errors , bandwidth undulating shortcomings, to improve the transmission reliability , this paper introduces a hybrid automatic retransmission (HARQ) transmission mechanism , HARQ is a combination of FEC and ARQ to improve the communication the reliability of the technology . The actual test environment for different coding rate and transmission strategy , the use of the CIF image , the peak signal-to-noise ratio PSNR standard test the performance and functionality of the video server , the video server has a good network adaptability .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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