Proceedings of the KSPS conference (대한음성학회:학술대회논문집)

The Korean Society Of Phonetic Sciences And Speech Technology (대한음성학회)
권호 표지

Improvement of Speech Recognition Performance in Running Car by Considering Wind Noise

바람잡음을 고려한 자동차에서의 음성인식 성능 향상

  • Lee, Ki-Hoon (Department of Electronic Engineering, Chonbuk National University) ;
  • Lee, Chul-Hee (Department of Electronic Engineering, Chonbuk National University) ;
  • Kim, Chong-Kyo (Department of Electronic Engineering, Chonbuk National University)
  • 이기훈 (전북대학교 전자 공학과) ;
  • 이철희 (전북대학교 전자 공학과) ;
  • 김종교 (전북대학교 전자 공학과)
  • Published : 2004.05.06
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Abstract

This paper describes an efficient method for improving the noise-robustness in speech recognition in a running car by considering wind noise. In driving car, mainly three kind of noises engine noise, tire noise and wind noise, are severely affect recognition performance. Especially wind noise is an important factor in driving car with window opened. We analyzed wind noise in various driving conditions that are 60, 80, 100 km/h with window fully opened, window half opened. We clarified that the recognition rate is significantly degenerated when the wind noise components in the frequency range above 200 Hz are large. We developed a preprocessing method to improve the noise robustness despite of wind noise. We adaptively changed the cutoff frequency of the front-end high-pass filter from 100 through 200 Hz according to the level of the wind noise components. By this method, the recognition rate is considerably improved for all kind of driving conditions

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