DocumentCode
2604248
Title
Improved Chen-Smith image coder
Author
Rubino, Eduardo M. ; Malvar, Henrique S. ; De Queiroz, Ricardo L.
Author_Institution
Dept. de Engenharia Eletrica, Brasilia Univ., Brazil
fYear
1993
fDate
3-6 May 1993
Firstpage
267
Abstract
An image compression system based on transform coding and zonal sampling is presented. It is based on the Chen-Smith coder, but with an improved technique for transform coefficient quantization and the replacement of the discrete cosine transform (DCT) by the lapped orthogonal transform (LOT). The system leads to signal-to-noise ratios that are from 1.5 to 2.0 dB above those obtained with the standard JPEG algorithm, for a wide variety of test images and compression rates
Keywords
data compression; image coding; image sampling; transform coding; Chen-Smith image coder; compression rates; image compression system; lapped orthogonal transform; signal-to-noise ratios; test images; transform coding; transform coefficient quantization; zonal sampling; Bismuth; Bit rate; Code standards; Decoding; Discrete cosine transforms; Discrete transforms; Image coding; Quantization; Signal processing algorithms; Transform coding;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location
Chicago, IL
Print_ISBN
0-7803-1281-3
Type
conf
DOI
10.1109/ISCAS.1993.393709
Filename
393709
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