Reconstruction of missing blocks in JPEG picture transmission

Author

Ancis, M. ; Giusto, D.D.

Author_Institution

Lab. of Multimedia Commun., Cagliari Univ., Italy

fYear

1999

fDate

1999

Firstpage

288

Lastpage

291

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-5582-2

Type

conf

DOI

10.1109/PACRIM.1999.799533

Filename

799533