Vector quantization using global codebook technique

Authors:
H. B. Kekre;T. K. Sarode;K. Raut;R. Tahiliani
Affiliations:
NMIMS University, Mumbai, India;TSEC Bandra(W), Mumbai, India;Thadomal Shahani Engineering College, Bandra(W), Mumbai, India;Thadomal Shahani Engineering College, Bandra(W), Mumbai, India
Venue:
Proceedings of the International Conference & Workshop on Emerging Trends in Technology
Year:
2011

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Abstract

Vector Quantization is a technique of compressing data based on grouping blocks having similar data. These blocks are called Code Vectors and all the code vectors grouped together is called a Codebook. The key to VQ data compression is a good codebook. In order to reduce bandwidth overhead it is necessary to generate Global Codebook for a particular class of images. Otherwise local codebook has to be transferred every time before the transmission of image. In this paper various global codebook generation algorithms for vector quantization for color images are presented.