Bandwidth extension of narrowband speech using cepstral analysis

Author

Soon, I.Y. ; Yeo, C.K.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

fYear

2004

fDate

20-22 Oct. 2004

Firstpage

242

Lastpage

245

Abstract

This paper describes a vector quantization based algorithm that extends the bandwidth of narrowband speech into wideband speech. Cepstral analysis is used to represent the spectral envelope information and the wideband excitation is generated using fullwave rectification with spectral whitening. Objective and subjective tests conducted show great improvement in speech quality over the original narrowband speech. The algorithm can be implemented as a postprocessor without the need for any side information.

Keywords

cepstral analysis; interpolation; signal reconstruction; speech enhancement; vector quantisation; cepstral analysis; enhancement algorithm; envelope extension; fullwave rectification; interpolated VQ; narrowband speech bandwidth extension; nonlinear excitation generation; postprocessor; signal reconstruction; spectral envelope information; spectral whitening; speech quality; vector quantization; wideband excitation; wideband speech; Bandwidth; Cepstral analysis; Frequency; Hidden Markov models; Narrowband; Network synthesis; Speech analysis; Speech enhancement; Telephony; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Multimedia, Video and Speech Processing, 2004. Proceedings of 2004 International Symposium on

Print_ISBN

0-7803-8687-6

Type

conf

DOI

10.1109/ISIMP.2004.1434045

Filename

1434045