Optimization Design of Video Communication in 3G Network

Considering the characteristics of low bandwidth channel and large jitter of CDMA2000 3G network,a system design based on H.264 hardware Codec was optimized for realizing real-time video communication in 3G network.The design includes the live-video pre-processor,the H.264 Codec,a ARM9 CPU and a network transmission module.The image is AD converted by pre-processor and sampled,then compressed to CIF resolution.The CPU will comprehensively optimize the settings and adjust the QP parameters and the GOP structure,and then the data is compressed by hardware Codec and then transported in the network by RTP package.When decoding the data received from the network,the hardware Codec will sort and restore the data directly for display.Experimental results show that the optimized system can effectively reduce the bit rate of the image data and reduce the transmission bandwidth requirement,achieving the design purpose of real-time communication in 3G network.