Title :
Image coding with uniform and piecewise-uniform vector quantizers
Author :
Jeong, Dae Gwon ; Gibson, Jerry D.
Author_Institution :
Dept. of Avionics Eng., Hankuk Aviation Univ., Kyunggi, South Korea
fDate :
2/1/1995 12:00:00 AM
Abstract :
New lattice vector quantizer design procedures for nonuniform sources that yield excellent performance while retaining the structure required for fast quantization are described. Analytical methods for truncating and scaling lattices to be used in vector quantization are given, and an analytical technique for piecewise-linear multidimensional companding is presented. The uniform and piecewise-uniform lattice vector quantizers are then used to quantize the discrete cosine transform coefficients of images, and their objective and subjective performance and complexity are contrasted with other lattice vector quantizers and with LBG training-mode designs
Keywords :
discrete cosine transforms; image coding; piecewise-linear techniques; vector quantisation; LBG training mode; analytical methods; complexity; discrete cosine transform coefficients; fast quantization; image coding; lattice vector quantizer; nonuniform sources; objective performance; performance; piecewise-linear multidimensional companding; piecewise-uniform lattice; piecewise-uniform vector quantizers; subjective performance; uniform vector quantizers; vector quantization; Aerospace electronics; Computational modeling; Discrete cosine transforms; Helium; Image coding; Laplace equations; Lattices; Multidimensional systems; Piecewise linear techniques; Vector quantization;
Journal_Title :
Image Processing, IEEE Transactions on
