MAP decoding with random interleaver for MPEG-4 image indoor wireless transmission system

摘要

Here, the investigation of the performance of MAP decoding with random interleaver for MPEG-4 image transmission system is described and analyzed. The performance evaluation is shown by setting MAP decoder to match the priori statistic of zerotree symbol sequence of the “Lena” image. In this work, we successfully reduce the computation of the random interleaver process by omitting the calculation of the interleaving matrix P. In some cases, despite the computational reduction, the slight improvement of about 0.5-1 dB in PSNR can still be obtained.