VQ Codebook Searching Algorithm Based on Correlation Property
Fundamenta Informaticae
Fast search algorithm for vector quantization
Proceedings of the International Conference on Advances in Computing, Communication and Control
VQ Codebook Searching Algorithm Based on Correlation Property
Fundamenta Informaticae
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A fast search algorithm for vector quantization (VQ) is presented. This approach provides a practical solution to the implementation of a multilevel search based on a special designed directed graph (DG). An algorithm is also given of the optimal DG for any given practical source. Simulation results obtained from applying this approach to still images have shown that it can reduce the searching complexity to 3% of the exhaustive search vector quantization (ESVQ) while introducing only negligible searching errors. It has also been shown that the searching complexity is close to a linear growth with the bit rate rather than an exponential growth in ESVQ,