대한음성학회:학술대회논문집 (Proceedings of the KSPS conference)

대한음성학회 (The Korean Society Of Phonetic Sciences And Speech Technology)
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Spline 코드북 기반의 spectral folding을 이용한 대역폭 확장 방법

Bandwidth Expansion Method Using Spline Codebook Based Spectral Folding

  • 박지훈 (한국정보통신대학교 음성/음향 정보연구실) ;
  • 한승호 (한국정보통신대학교 음성/음향 정보연구실) ;
  • 양희식 (한국정보통신대학교 음성/음향 정보연구실) ;
  • 정상배 (한국정보통신대학교 음성/음향 정보연구실) ;
  • 한민수 (한국정보통신대학교 음성/음향 정보연구실)
  • Park, Ji-Hoon (Speech and Audio Information Lab., Information and Communications Univ.) ;
  • Han, Seung-Ho (Speech and Audio Information Lab., Information and Communications Univ.) ;
  • Yang, Hee-Sik (Speech and Audio Information Lab., Information and Communications Univ.) ;
  • Jeong, Sang-Bae (Speech and Audio Information Lab., Information and Communications Univ.) ;
  • Hahn, Min-Soo (Speech and Audio Information Lab., Information and Communications Univ.)
  • 발행 : 2006.11.17
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초록

Quality of narrowband speech $(0{\sim}4kHz)$ can be enhanced by the bandwidth expansion technique, by which the high- band components are estimated. This paper proposes the bandwidth expansion method using the spline codebook based spectral folding. For the performance evaluation, the PESQ(Perceptual Evaluation of Speech Quality) scores are measured as the objective measurement In addition, the MOS (Mean Opinion Score) and the preference tests are performed as the subjective measurement. The results show our proposed method outperforms the existing spline based one.

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