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IEICE TRANSACTIONS on Information

Noise Robust Speaker Identification Using Sub-Band Weighting in Multi-Band Approach

Sungtak KIM, Mikyong JI, Youngjoo SUH, Hoirin KIM

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Summary :

Recently, many techniques have been proposed to improve speaker identification in noise environments. Among these techniques, we consider the feature recombination technique for the multi-band approach in noise robust speaker identification. The conventional feature recombination technique is very effective in the band-limited noise condition, but in broad-band noise condition, the conventional feature recombination technique does not provide notable performance improvement compared with the full-band system. Even though the speech is corrupted by the broad-band noise, the degree of the noise corruption on each sub-band is different from each other. In the conventional feature recombination for speaker identification, all sub-band features are used to compute multi-band likelihood score, but this likelihood computation does not use a merit of multi-band approach effectively, even though the sub-band features are extracted independently. Here we propose a new technique of sub-band likelihood computation with sub-band weighting in the feature recombination method. The signal to noise ratio (SNR) is used to compute the sub-band weights. The proposed sub-band-weighted likelihood computation makes a speaker identification system more robust to noise. Experimental results show that the average error reduction rate (ERR) in various noise environments is more than 24% compared with the conventional feature recombination-based speaker identification system.

Publication
IEICE TRANSACTIONS on Information Vol.E90-D No.12 pp.2110-2114
Publication Date
2007/12/01
Publicized
Online ISSN
1745-1361
DOI
10.1093/ietisy/e90-d.12.2110
Type of Manuscript
LETTER
Category
Speech and Hearing

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