A New Algorithm For Reconstruction of Lost Blocks Using Discrete Wavelet Transform

Abstract

A new algorithm for reconstruction of a completely lost blocks using the 1-D discrete wavelet transform is proposed in this paper. Fading in wireless channels can cause the entire transmission of block-coded images to be received with errors and causing the information of the block to be lost. Instead of using common retransmission query protocols, the error block is substituted from pixel values of the neighborhood of the lost block. The proposed algorithm does not require a DC estimation method. While most of the previuosly reconstruction methods assume that the DC value is available or a DC estimation is required.