NDLI: Optimal subband coding with Lloyd-Max quantization

Content Provider	IEEE Xplore Digital Library
Author	Strintzis, M.G. Tzovaras, D.
Copyright Year	1996
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Thessaloniki Univ., Greece (Strintzis, M.G.)
Abstract	A new method is presented for the analysis of the effects of Lloyd-Max quantization in subband filter banks and for the optimal design of such filter banks. A rigorous statistical model of a vector Lloyd-Max quantizer is established first, consisting of a linear time-invariant filter followed by additive noise uncorrelated with the input. On the basis of this model, an expression for this variance of the error of a subband coder using Lloyd-Max quantizers is explicitly determined. Given analysis filters which statistically separate the subbands, it is shown that this variance is minimized if the synthesis filters are chosen, which would achieve perfect reconstruction in lossless coding. The globally optimum filter bank, minimizing the coder error variance, is further obtained by proper choice of its analysis filters. The results are evaluated experimentally in the realistic setting of a logarithmically split subband image coding scheme.
Starting Page	621
Ending Page	624
File Size	404735
Page Count	4
File Format	PDF
ISBN	0780332598
DOI	10.1109/ICIP.1996.559573
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-09-19
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quantization Filter bank Additive noise Image reconstruction Signal analysis Signal synthesis Bit rate Vectors Nonlinear filters Analysis of variance
Content Type	Text
Resource Type	Article

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