• Title/Summary/Keyword: Cellular phone speech DB

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A Study on the Context-dependent Speaker Recognition Adopting the Method of Weighting the Frame-based Likelihood Using SNR (SNR을 이용한 프레임별 유사도 가중방법을 적용한 문맥종속 화자인식에 관한 연구)

  • Choi, Hong-Sub
    • MALSORI
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    • no.61
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    • pp.113-123
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    • 2007
  • The environmental differences between training and testing mode are generally considered to be the critical factor for the performance degradation in speaker recognition systems. Especially, general speaker recognition systems try to get as clean speech as possible to train the speaker model, but it's not true in real testing phase due to environmental and channel noise. So in this paper, the new method of weighting the frame-based likelihood according to frame SNR is proposed in order to cope with that problem. That is to make use of the deep correlation between speech SNR and speaker discrimination rate. To verify the usefulness of this proposed method, it is applied to the context dependent speaker identification system. And the experimental results with the cellular phone speech DB which is designed by ETRI for Koran speaker recognition show that the proposed method is effective and increase the identification accuracy by 11% at maximum.

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Performance Improvement of Voting-based Speaker Identification System by using the Observation Confidence (관측신뢰도 적용에 의한 투표기법 기반의 화자인식시스템의 성능향상)

  • Choi, Hong-Sub
    • Speech Sciences
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    • v.15 no.2
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    • pp.79-88
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    • 2008
  • Recently demands for the speech technology-based products targeted for the mobile terminals such as cellular phones and PDA are rapidly increasing. And voting-based speaker identification algorithm is known to have a good performance in the mobile environment, since it works well with small amount of speaker training data. In this paper, we proposed a method to improve the performance of this voting based speaker identification system by using the observation confidence value which is derived from the function of SNR each frame. The proposed method is evaluated with ETRI cellular phone DB which is made for the speaker recognition task. The experimental results show that the proposed method has better performance of 2-3% identification rate than the conventional GMM method.

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