Two-dimensional soft-input source decoding for robust transmission of compressed images

The transmission of compressed images over highly corrupted channels is addressed. The implicit residual redundancy inherent in the quantised subband images and the bit-reliability information at the channel output are utilised for error protection. As a novelty a known estimation technique is extended to the two-dimensional case, where both horizontal and vertical correlations are exploited. Especially for very noisy channels the quality of the reconstructed image is greatly increased compared to one-dimensional approaches.