Downsampling-based multiple description image coding using optimal filtering

bstract. In this paper, a multiple description image coding cheme is proposed to facilitate the transmission of images over edia with possible packet loss. The proposed method is based on nding the optimal reconstruction filter coefficients that will be used o reconstruct lost descriptions. For this purpose initially, the original mage is downsampled and each subimage is coded using standard PEG. These decoded images are then mapped to the original imge size using the optimal filters. Multiple descriptions consist of oded down-sampled images and the corresponding optimal recontruction filter coefficients. It is shown that the proposed method rovided better results compared to standard interpolation filters i.e., bicubic and bilinear). © 2008 SPIE and IS&T. DOI: 10.1117/1.2976420