TWO-DIMENSIONAL VECTOR QUANTIZER WITH VARIABLE LENGTH LOSSLESS CODE FOR LAPLACIAN SOURCE

Abstract

The main aim of this paper is to apply variable length lossless code on output points of the two-dimensional vector quantizer for Laplacian source. This problem is not yet solved in the literature. In this paper two-dimensional quantizer is designed using Helmert transform and its optimization is done. New lossless code is introduced. It is very simple but very close to the ideal code since it gives the bit-rate very close to the entropy. It is applied on the two-dimensional quantizer. It is shown that our two-dimensional quantizer can achieve the same performances as scalar uniform and nonuniform quantizers, but using much smaller number of points per dimension. Therefore, two-dimensional quantizer has smaller execution complexity.

http://dx.doi.org/10.5755/j01.itc.40.2.428