Title :
Error resilient pre-/post-filtering for DCT-based block coding systems
Author :
Tu, Cliengjie ; Tran, Trac D. ; Liang, Jie
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
Pre-/post-filtering can be attached to a DCT-based block coding system to improve coding efficiency as well as to mitigate blocking artifacts. Previously designed pre-/post-filters are optimized to maximize coding efficiency solely. For image and video communication over unreliable channels, those pre-/post-filters are sensitive to transmission errors. This paper addresses the problem of designing pre-/post-filters which are more error resilient. A family of pre-/post-filters are designed to provide desired trade-offs between coding efficiency and robustness to transmission errors. These filters achieve superior reconstruction performance without sacrificing much coding performance.
Keywords :
data compression; discrete cosine transforms; encoding; filtering theory; image coding; transform coding; DCT-based block coding systems; blocking artifacts; coding efficiency; coding performance; discrete cosine transform; error resilient pre-/post-filtering; image communication; post-filters; pre-filters; robustness; transmission errors; video communication; Block codes; Compaction; Computer errors; Decoding; Design optimization; Discrete cosine transforms; Filters; Image reconstruction; Robustness; Video compression;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1199225
