Vector quantization and signal compression
Vector quantization and signal compression
IEEE Transactions on Information Theory
A fast exact GLA based on code vector activity detection
IEEE Transactions on Image Processing
A fast search algorithm for vector quantization using L2-norm pyramid of codewords
IEEE Transactions on Image Processing
A fast vector quantization encoding method for image compression
IEEE Transactions on Circuits and Systems for Video Technology
Pattern Recognition Letters
Visualization of vector quantization
ISCGAV'06 Proceedings of the 6th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
A fast VQ codebook generation algorithm via pattern reduction
Pattern Recognition Letters
PREACO: A fast ant colony optimization for codebook generation
Applied Soft Computing
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Vector quantization (VQ) is a well-known compression method. In the encoding phase, given a block represented as a vector, searching the closest codeword in the codebook is a time-consuming task. An efficient law-of-cosine-based search algorithm for VQ is presented in this correspondence. In our proposed algorithm, some new formulae and a dynamic rule for selecting the fixed vector are presented to speed up the search process. Experimental results reveal that our proposed search algorithm has better execution-time when compared to the current result by Mielikainen and the previous result by Huang et al.