A NEW FAMILY OF EMBEDDED MULTIPLE DESCRIPTION SCALAR QUANTIZERS (MA-L5)

Author(s) : Augustin Ion Gavrilescu (Dept. of Electronics and Information Processing (ETRO), Belgium) Adrian Munteanu (Dept. of Electronics and Information Processing (ETRO), Belgium) Jean Cornelis (Dept. of Electronics and Information Processing (ETRO), Belgium) Peter Schelkens (Dept. of Electronics and Information Processing (ETRO), Belgium)

Abstract : A new family of Embedded Multiple Description Scalar Quantizers (EMDSQ) that supports the progressive transmission of images over variable-bandwidth error-prone channels is proposed in this paper. A control mechanism that allows for tuning the redundancy between the two descriptions for each quantization level is also designed. The employed mechanism enables the control of the tradeoff between the coding efficiency and error-resilience, and provides an increased robustness by improving the error resilience in the most important layers of the embedded bit-streams. Instantiations of the proposed family are incorporated in a wavelet-based embedded coding system, and the redundancy-control mechanism is practically demonstrated. Experimental results show that the proposed EMDSQ outperform the state-of-the-art Multiple Description Uniform Scalar Quantizers (MDUSQ) previously proposed in literature for error-resilient progressive image transmission.

Menu