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Noisy Speech Recognition Based on Noise-Adapted HMMs Using Speech Feature Compensation
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  • Noisy Speech Recognition Based on Noise-Adapted HMMs Using Speech Feature Compensation
  • Noisy Speech Recognition Based on Noise-Adapted HMMs Using Speech Feature Compensation
저자명
Chung. Yong-Joo
간행물명
信號處理·시스템學會 論文誌
권/호정보
2014년|15권 2호|pp.37-41 (5 pages)
발행정보
한국신호처리시스템학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

The vector Taylor series (VTS) based method usually employs clean speech Hidden Markov Models (HMMs) when compensating speech feature vectors or adapting the parameters of trained HMMs. It is well-known that noisy speech HMMs trained by the Multi-condition TRaining (MTR) and the Multi-Model-based Speech Recognition framework (MMSR) method perform better than the clean speech HMM in noisy speech recognition. In this paper, we propose a method to use the noise-adapted HMMs in the VTS-based speech feature compensation method. We derived a novel mathematical relation between the train and the test noisy speech feature vector in the log-spectrum domain and the VTS is used to estimate the statistics of the test noisy speech. An iterative EM algorithm is used to estimate train noisy speech from the test noisy speech along with noise parameters. The proposed method was applied to the noise-adapted HMMs trained by the MTR and MMSR and could reduce the relative word error rate significantly in the noisy speech recognition experiments on the Aurora 2 database.