Reconstruction of missing blocks in JPEG picture transmission

The paper deals with error concealment in block-coded image transmission over noisy channels. In particular, it proposes a novel algorithm for missing block reconstruction in the frequency domain. In fact, damaged blocks are recovered by interpolating the DCT coefficients of available neighboring blocks. Coefficient interpolation is investigated in four different variants; median and edge-based interpolation are chosen for their capabilities in high-quality reconstruction. Experimental results show a good performance in homogeneous and textured regions, as well as in blocks containing edges.

[1]  Ness B. Shroff,et al.  A Bayesian approach to error concealment in encoded video streams , 1996, Proceedings of 3rd IEEE International Conference on Image Processing.

[2]  Yao Wang,et al.  Maximally smooth image recovery in transform coding , 1993, IEEE Trans. Commun..

[3]  Yao Wang,et al.  Signal loss recovery in DCT-based image and video codecs , 1991, Other Conferences.