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Design of Visual Quantizer for very low Bit-rate Coding on JPEG2000  

Kim, Dong-Hyeok (Department of Information and Communication Engineering, Dongguk University)
Jeon, Joon-Hyeon (Department of Information and Communication Engineering, Dongguk University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.47, no.4, 2010 , pp. 69-78 More about this Journal
Abstract
The irreversible 9/7 JPEG2000, which is one of sub-band coding techniques, has a problem of severe picture quality distortion at the edge and the background caused by the quantization error below 0.15bpp. In this paper, to solve such problems we propose a VQ(Visual Quantizer) based on L-pdf(Laplace probability density function) statistical characteristics of high frequency sub-bands. The proposed VQ is designed by visual parameter for improving the subjective quality and weighting parameter for increasing the compression ratio. A proposed method, based on 9/7 JPEG2000 scheme, gives the high subjective quality to reconstructed images below 0.15bpp and provides minimum MSE(Mean-Squared Error) regardless of the compression ratio.
Keywords
JPEG2000; DWT; SBC; Quantizer; Visual Quantizer;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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