A New Unequal Error Protection Technique Based on the Mutual Information of the MPEG-4 Video Frames over Wireless Networks

The performance of video transmission over wireless channels is limited by thechannel noise. thus many error resilience tools have been incorporated into the mpeg-4video compression method. in addition to these tools, the unequal error protection (uep)technique has been proposed to protect the different parts in an mpeg-4 video packet withdifferent channel coding rates based on the rate compatible punctured convolutional(rcpc) codes. however, it is still not powerful enough for the noisy channels. to providemore robust mpeg-4 video transmission, this paper proposes a modified unequal errorprotection technique based on the mutual information of two video frames. in the proposedtechnique, the dynamic channel coder rates are determined online based on the mutualinformation of two consecutive video frames. with this technique, irregular and highmotion areas that are more sensitive to errors can get more protection. simulation resultsshow that the proposed technique enhances both subjective visual quality and average peaksignal to noise ratio (psnr) about 2.5 db, comparing to the traditional uep method.