Title :
A performance study of DCT and subband image codecs with zero-zone quantizers
Author :
Ramkumar, M. ; Akansu, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
fDate :
31 May-3 Jun 1998
Abstract :
It has been shown that zero-zone quantizers offer very good R-D tradeoffs, especially at low bit rates, in spite of their simplicity in implementation and concept. The performance of such codecs for still and moving images have been reported for a dyadic 10-band subband coder. In this paper we extend those results to other subband image codecs, and DCT, and compare their performances
Keywords :
discrete cosine transforms; image coding; quantisation (signal); DCT; R-D tradeoffs; bit rates; moving images; still images; subband image codecs; zero-zone quantizers; Bit rate; Codecs; Compaction; Computational complexity; Discrete cosine transforms; Equations; Filters; Quantization; Rate-distortion;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.694422
