IMAGE-CODING WITH UNIFORM AND PIECEWISE-UNIFORM VECTOR QUANTIZERS

New lattice vector quantizer design procedures for nonuniform sources that yield excellent performance while retaining the structure require d for fast quantization are described. Analytical methods for truncati ng and scaling lattices to be used in vector quantization are given, a nd an analytical technique for piecewise-linear multidimensional compa nding is presented, The uniform and piecewise-uniform lattice vector q uantizers are then used to quantize the discrete cosine transform coef ficients of images, and their objective and subjective performance and complexity are contrasted with other lattice vector quantizers and wi th LBG training-mode designs.