DocumentCode :
302188
Title :
GenLOT-design and application for transform-based image coding
Author :
Rautmann, Steffent ; Nguyen, Truong Q.
Author_Institution :
Inst. fur Nachrichtentech., Tech. Univ. Dresden, Germany
Volume :
1
fYear :
1995
fDate :
Oct. 30 1995-Nov. 1 1995
Firstpage :
41
Abstract :
Wavelet transform with symmetric basis functions has emerged as the next-generation standard for still-image compression. Wavelet methods outperform the current JPEG standard (block transform based on DCT) at low bit rates, since the DCT-based transform suffers from blocking effects due to its short basis functions. GenLOT is a new linear-phase block orthogonal transform which drastically reduces the blocking effects at low bit rates. We present the theory, structure and design methods for GenLOT. In particular, GenLOTs that perform well in image compression are discussed. We compare the performance of GenLOTs, in both objective and subjective measures, to the symmetric wavelet transforms. For a certain class of images, GenLOTs outperform the symmetric wavelet transforms.
Keywords :
band-pass filters; code standards; data compression; filtering theory; image coding; telecommunication standards; transform coding; wavelet transforms; DCT; JPEG standard; block transform; blocking effects reduction; design methods; filter banks; linear-phase block orthogonal transform; low bit rates; objective measures; performance; still image compression standard; subjective measures; symmetric basis functions; symmetric wavelet transforms; transform based image coding; wavelet methods; Bit rate; Code standards; Discrete cosine transforms; Filter bank; Fingerprint recognition; Finite impulse response filter; Image coding; Symmetric matrices; Transform coding; Wavelet transforms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 1995. 1995 Conference Record of the Twenty-Ninth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
ISSN :
1058-6393
Print_ISBN :
0-8186-7370-2
Type :
conf
DOI :
10.1109/ACSSC.1995.540510
Filename :
540510
Link To Document :
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