Title :
A multiple description method for wavelet based image coding
Author :
Ashwin, A.C. ; Ramakrishnan, K.R. ; Srinivasan, S.H.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
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 the 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.
Keywords :
channel coding; image coding; optimisation; packet radio networks; smoothing methods; source coding; transform coding; visual communication; wavelet transforms; channel coding; channel state information; coder design; coefficients partitioning; decoder; encoder; multiple description method; optimal channel rate allocation; optimal concealment method; packet based transmission system; residual redundancy; simulations; smoothness property; source coding; source significance; statistical characteristics; subband; wavelet based image coding; wavelet coefficients; wavelet transform coded images; wireless image transmission; wireless transmission; Ash; Bandwidth; Channel coding; Channel state information; Decoding; Image coding; Image communication; Redundancy; Wavelet coefficients; Wavelet transforms;
Conference_Titel :
Image Processing. 2002. Proceedings. 2002 International Conference on
Print_ISBN :
0-7803-7622-6
DOI :
10.1109/ICIP.2002.1040049
