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Author Chan, K.W. ♦ Chan, K.L.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1994
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Image coding ♦ Bit rate ♦ Signal synthesis ♦ Signal analysis ♦ Image reconstruction ♦ Switches ♦ Quantization ♦ Decoding ♦ Filters ♦ Cities and towns
Abstract A block adaptive SBC is combined with an adaptive AMBTC for near perfect reconstruction. The input images are decomposed into 4 subbands and are individually coded by AMBTC. The AMBTC will adapt to the signal variance and switch the output from 1 to 4 levels dynamically. Its performance is further optimized by Dynamic Range Tuning (DRT) and Central Aggregate Optimization (CAO). To avoid costly high precision coder, the lowest frequency band is further split into a coded subband and a residue one. All bands are coded by the same coder. Bit allocation is furnished by the dynamic adaptability of AMBTC, and a bit-reduction scheme derived from signal statistics of respective subbands. This 5-band coding system eliminates the blockiness and the jagged edge artifact completely. The simulation result also leads the closest one by a great margin.
Description Author affiliation: Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong (Chan, K.W.; Chan, K.L.)
ISBN 0780318625
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1994-08-22
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 379.78 kB
Page Count 5
Starting Page 422
Ending Page 426

Source: IEEE Xplore Digital Library