A Study on the Reliable Video Transmission Through Source/Channel Combined Optimal Quantizer for EREC Based Bitstream

Current outburst needs for multimedia communication over error prone network such as mobile channel pose many challenging problems. One of the most important issues is the error handling technique for transmitted bitstream including video because the errors severely propagate through spatio-temporal direction in video and thus may cause serious degradation in reconstructed video quality. In order to prevent such devastating error effects, error resilient entropy coding (EREC) technique was applied to the proposed scheme in this paper. We analyze the error propagation in EREC based on a specific searching pattern, and then develop an estimation technique for the probability of a basic coding unit being in error at its decoding. Then we approximate the estimated probability to model the end-to-end degradation by the function of generated number of bits for each basic coding unit. Based on the approximation, we propose a new optimal quantization scheme, in order to make the transmitted video more resilient to the channel erros. Our method is optimal in the sense that the distortion