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Due to the fruitful and diversified contents of multimedia traffic and susceptible circumstances of wireless communications, using Unequal Error Protection (UEP) is now an active research subject. In this paper the authors propose an error rate weighted transmission scheme that combines both the convolution coding and non-uniform QAM schemes for transmitting H.264/AVC video data, which takes into consideration the non-uniformly distributed importance of Intracoded frame (I-frame) and Predictive coded frame (P frame) as well as the sensitivity of the coded bitstream against transmission errors. The non-uniform QAM constellations are used to give different degrees of the error protection, the transmission system is evaluated under AWGN .Simulation results indicated that the strategy produces a significant improvement into the Peak Signal-to-Noise Ratio (PSNR).
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