An Error Concealment Algorithm Using Discrete Wavelet Transform


Abstract:A new algorithm for error concealment of a completely lost blocks using the 1-Ddiscrete wavelet transform is proposed in this paper. The transmission of block-codedimages, fading in wireless channels can cause errors in entire blocks and consequentlycauses the loss of information of the block. Instead of using common retransmissionquery protocols, the error block is substituted for pixel values of the neighborhood ofthe lost block.The proposed algorithm does not require a DC estimation method. While most of thepreviously error concealment methods assume that the DC value is available or DCestimation is required.