Design of error-resilient M-description codec over wireless broadcasting networks

A practical error-resilient M-description codec scheme is designed to combat the bit errors of the wireless broadcasting networks and raise the quality of the reconstructed signal. The signal is coded into large number of mutually refinable descriptions by robust staggered M-description scalar quantizer (RSMDSQ). Then an index assignment method is used to enhance the error-resilient capacity of any subset of all generated descriptions by enlarging the hamming distance of the codewords. Accordingly, at the terminal, an enhanced decoding scheme is used to recover the signal utilizing the robust correlation among the descriptions. Simple simulations have been done on MATLAB.