Abstract
In recent years the importance of video communication has been increased many folds. In this paper, we propose an information significance biased bit allocation technique for rate distortion optimisation. First MPEG-2 compressed bitstreams are separated in different layers. Each layer effect in received quality due to channel constrains decides the priority of the layer and the required level of Unequal Error Protection (UEP). Results indicate that Joint Source Channel Coding (JSCC) with UEP for three-layer (I, B, P frames) defined as UEP3 can lead better acceptable quality of video in noisy environment compared to 1-layer Equal Error Protection (EEP) and 2-layer (Base layer and Enhancement Layer) UEP2 coding approach. Further PSNR of UEP3 method can be improved using layering of I frame Blocks. Blocks are classified into strong informative and marginal informative category by considering the local variance and grey scale gradient distribution and protection are assigned.
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