Fast search method for nearest neighbor vector quantization

Fast search method for nearest neighbor vector quantization

1. Field of the Invention A fast search method for searching for an optimum codeword for nearest neighbor vector quantization. An upper boundary value and a lower boundary value between which an optimum codeword will exist in a codebook are calculated using a distortion of a designated element in an...

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Hauptverfasser: Lee, Nam-Il, Kim, Yong-Serk, Hwang, Seong-Kyu, Kang, Sang-Won, Chi, Sang-Hyun
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Sprache:eng
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creator Lee, Nam-Il
Kim, Yong-Serk
Hwang, Seong-Kyu
Kang, Sang-Won
Chi, Sang-Hyun
description 1. Field of the Invention A fast search method for searching for an optimum codeword for nearest neighbor vector quantization. An upper boundary value and a lower boundary value between which an optimum codeword will exist in a codebook are calculated using a distortion of a designated element in an input vector and an experimentally determined threshold. Further, a start point and an end point for codebook search are determined using a binary search method from a codebook rearranged in descending order, and a full search scheme is applied only within a search range calculated by the determined start point and end point, thereby determining an optimum codeword for nearest neighbor vector quantization.
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Field of the Invention A fast search method for searching for an optimum codeword for nearest neighbor vector quantization. An upper boundary value and a lower boundary value between which an optimum codeword will exist in a codebook are calculated using a distortion of a designated element in an input vector and an experimentally determined threshold. Further, a start point and an end point for codebook search are determined using a binary search method from a codebook rearranged in descending order, and a full search scheme is applied only within a search range calculated by the determined start point and end point, thereby determining an optimum codeword for nearest neighbor vector quantization.</abstract><oa>free_for_read</oa></addata></record>
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title Fast search method for nearest neighbor vector quantization
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