A multiple description method for wavelet based image coding

We propose a new multiple description method for wavelet transform coded images. The partitioning of the coefficients at the encoder is combined with concealment at the decoder to produce descriptions. An optimal concealment method for wavelet coefficients is derived based on statistical characteristics. Concealment in LL subband is treated differently and is based on its smoothness property. We have designed a coder for wireless image transmission which emphasizes the need for source and channel coding interaction based on residual redundancy. Optimal channel rate allocation is derived depending upon source significance and channel state information. Simulations for wireless transmission have shown promising results.

• Type: Conference
• Year: 2002
• Where: ICIP
• Authors: A. C. Ashwin, K. R. Ramakrishnan, S. H. Srinivasan
• Keywords: Channel Coding Interaction, ICIP 2002, Image Processing, Optimal Channel Rate, Optimal Concealment Method