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Initial codebook method of vector quantisation in Hadamard domain

Initial codebook method of vector quantisation in Hadamard domain

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  • Author(s): S.X. Chen 1  and  F.W. Li 1
    • View affiliations
    • Affiliations: 1: Communication and Information Engineering College, Chongqing University of Posts and Telecommunications (CQUPT), ChongQing, People's Republic of China
  • Source: Volume 46, Issue 9, 29 April 2010, p. 630 – 631
    DOI:  10.1049/el.2010.3573 , Print ISSN 0013-5194, Online ISSN 1350-911X
© The Institution of Engineering and Technology
Published

To deal with the problem that the initialisation method based on random selection may provide a suboptimal codebook of vector quantisation (VQ); an improved method is proposed. In the proposed method, Hadamard transform is performed on training vectors, and then the transformed vectors are sorted according to their first elements. The ordered transformed vectors are partitioned into groups. The initial codebook is composed of the mid vector of each ordered group. This method has a better performance and can be used as the initialisation method of VQ to improve and speed up codebook design.

Inspec keywords: Hadamard codes; vector quantisation; Hadamard transforms

Other keywords: vector quantisation; random selection; initial codebook method; Hadamard domain; Hadamard transform; initialisation method

Subjects: Codes; Integral transforms

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