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Speech Parameters for the Robust Emotional Speech Recognition

감정에 강인한 음성 인식을 위한 음성 파라메터

  • 김원구 (군산대학교 전기공학과)
  • Received : 2010.09.10
  • Accepted : 2010.12.01
  • Published : 2010.12.01

Abstract

This paper studied the speech parameters less affected by the human emotion for the development of the robust speech recognition system. For this purpose, the effect of emotion on the speech recognition system and robust speech parameters of speech recognition system were studied using speech database containing various emotions. In this study, mel-cepstral coefficient, delta-cepstral coefficient, RASTA mel-cepstral coefficient and frequency warped mel-cepstral coefficient were used as feature parameters. And CMS (Cepstral Mean Subtraction) method were used as a signal bias removal technique. Experimental results showed that the HMM based speaker independent word recognizer using vocal tract length normalized mel-cepstral coefficient, its derivatives and CMS as a signal bias removal showed the best performance of 0.78% word error rate. This corresponds to about a 50% word error reduction as compare to the performance of baseline system using mel-cepstral coefficient, its derivatives and CMS.

Acknowledgement

Supported by : 한국연구재단

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