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Fast nearest-neighbor search based on Voronoi projections and its application to vector quantization encoding

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2 Author(s)
Ramasubramanian, V. ; Comput. Syst. & Commun. Group, Tata Inst. of Fundamental Res., Bombay ; Paliwal, K.K.

In this work, we consider two fast nearest-neighbor search methods based on the projections of Voronoi regions, namely, the box-search method and the cell-partition search method. We provide their comprehensive study in the contest of vector quantization encoding. We show that the use of principal component transformation reduces the complexity of Voronoi-projection based search significantly for data with high degree of correlation across their components

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Speech and Audio Processing, IEEE Transactions on  (Volume:7 ,  Issue: 2 )