Proceedings of the KSPS conference (대한음성학회:학술대회논문집)

The Korean Society Of Phonetic Sciences And Speech Technology (대한음성학회)
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Enhanced source controlled variable bit-rate scheme in a waveform interpolation coder

Source controlled variable bit-rate scheme을 이용한 파형 보간 부호화기의 음질 개선 기법

  • Cho, Keun-Seok (Speech and Audio Information Lab, Information and Communication Univ.) ;
  • Yang, Hee-Sik (Speech and Audio Information Lab, Information and Communication Univ.) ;
  • Jeong, Sang-Bae (Speech and Audio Information Lab, Information and Communication Univ.) ;
  • Hahn, Min-Soo (Speech and Audio Information Lab, Information and Communication Univ.)
  • 조근석 (한국정보통신대학교 음성음향정보연구실) ;
  • 양희식 (한국정보통신대학교 음성음향정보연구실) ;
  • 정상배 (한국정보통신대학교 음성음향정보연구실) ;
  • 한민수 (한국정보통신대학교 음성음향정보연구실)
  • Published : 2007.05.18
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Abstract

This paper proposes the methods to enhance the speech quality of source controlled variable bit-rate coder based on the waveform interpolation. The methods are to estimate and generate the parameters that are not transmitted from encoder to decoder by the repetition and extrapolation schemes. For the performance evaluation, the PESQ(Perceptual Evaluation of Speech Quality) scores are measured. The experimental results shows that our proposed method outperforms the conventional source controlled variable bit-rate coder. Especially, the performance of the extrapolation method is better than that of the repetition method.

Keywords