Title :
Reconstruction of missing blocks in JPEG picture transmission
Author :
Ancis, M. ; Giusto, D.D.
Author_Institution :
Lab. of Multimedia Commun., Cagliari Univ., Italy
Abstract :
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
Keywords :
discrete cosine transforms; frequency-domain analysis; image coding; image reconstruction; image sequences; interpolation; transform coding; visual communication; DCT coefficients; JPEG picture transmission; block-coded image transmission; damaged blocks recovery; edge-based interpolation; error concealment; frequency domain; homogeneous regions; median-based interpolation; missing blocks reconstruction; noisy channels; textured regions; Degradation; Discrete cosine transforms; Filtering; Frequency domain analysis; Image communication; Image reconstruction; Interpolation; Multimedia communication; Statistics; Video sequences;
Conference_Titel :
Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-5582-2
DOI :
10.1109/PACRIM.1999.799533
