Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Joint Source-Channel Coding Based on Cosine-Modulated Filter Banks for Erasure-Resilient Signal Transmission Slavica Marinkovic | EURASIP Journal on Applied Signal Processing 2005 4 510-524 2005 Hindawi Publishing Corporation Joint Source-Channel Coding Based on Cosine-Modulated Filter Banks for Erasure-Resilient Signal Transmission Slavica Marinkovic IRISA-INRIA Campus Universitaire de Beaulieu 35042 Rennes Cedex France Em ail Christine Guillemot IRISA-INRIA Campus Universitaire de Beaulieu 35042 Rennes Cedex France Email Received 2 April 2004 Revised 18 August 2004 Recommended for Publication by Helmut Boelcskei This paper examines erasure resilience of oversampled filter bank OFB codes focusing on two families of codes based on cosine-modulated filter banks CMFB . We first revisit OFBs in light of filter bank and frame theory. The analogy with channel codes is then shown. In particular for paraunitary filter banks we show that the signal reconstruction methods derived from the filter bank theory and from coding theory are equivalent even in the presence of quantization noise. We further discuss frame properties of the considered OFB structures. Perfect reconstruction PR for the CMFB-based OFBs with erasures is proven for the case of erasure patterns for which PR depends only on the general structure of the code and not on the prototype filters. For some of these erasure patterns the expression of the mean-square reconstruction error is also independent of the filter coefficients. It can be expressed in terms of the number of erasures and of parameters such as the number of channels and the oversampling ratio. The various structures are compared by simulation for the example of an image transmission system. Keywords and phrases frames filter banks source coding channel coding erasure channels Internet communication. 1. INTRODUCTION The advent of multimedia communication over packet-switched IP networks is creating challenging problems in the area of coding. Due to the real-time nature of data streams multimedia delivery usually makes
