This paper investigates the intra refresh techniques for video transmission in wireless scenario. Twostate Markov model is proposed to simulate the fading wireless channel. Taking feedback information into account, we analyze the channel distortion due to the burst errors. An improved intra refresh scheme is then proposed for optimal selection of coding mode for each Macroblock (MB) in rate-distortion framework. The propo sedscheme can stop error propagation and reduce channel distortion effectively. Simulations using TMN10 show that our scheme obtains improved performance with respect to error resilience for wireless video communication.
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