Design Issues on Error Resilient Transmission of Video & Image: Multi Description Coding for Wireless Sensor Network
نویسندگان
چکیده
Transmission of video signals & high definition (HD) and super high definition (SHD) image coding require scalability and progressibility & embededness. Transmision over wireless channels has to cope with the high probability and burstyness of errors introduced by Gaussian noise, linear distortions, and fading. For such environment, Multi description coding (MDC) which incorporates error resilience is an important issue. In the first section the algorithms of Multiple description coding (MDC) based on the lower-tree wavelet (LTW) are studied, suitable for real-time applications of video delivery. These are based on different quantizers to the wavelet coefficients according to the quardtrees & the other is based on the structure unanimity of the two descriptions generated from wavelet coefficients according to the bit plane. In the second section Multiple description coding (MDC) algorithms based on poly-phase Sampling using SPIHT wavelet transform. And in the third section pixel interleaving MD image framework (A so-called SlepianWolf set partitioning in hierarchical tree SW-SPIHT). Keywords-— MDC , SPIHT, Wavelet Transform, Polyphase Sampling.
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