Transformation of narrowband speech into wideband speech with aid of zero crossings rate

Author

Soon, I.Y. ; Koh, S.N. ; Yeo, Chai Kiat ; Ngo, W.H.

Author_Institution

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

Volume

38

Issue

24

fYear

2002

fDate

11/21/2002 12:00:00 AM

Firstpage

1607

Lastpage

1608

Abstract

An innovative technique, for narrowband to wideband transformation of speech signals, is proposed. The zero crossings rate is used to adaptively control the gain of the synthesised upper band speech leading to significant performance improvement over an existing technique. Results are in fact comparable to more complex techniques. The technique can be implemented at the receiving end alone as it does not require any side information to be transmitted and can be easily implemented using finite impulse response digital filters.

Keywords

FIR filters; digital filters; filtering theory; signal reconstruction; speech processing; speech synthesis; adaptive gain control; finite impulse response digital filters; narrowband speech transformation; reconstructed wideband signal; sampled narrowband speech files; speech intelligibility; speech synthesis; speech transmission systems; synthesised upper band speech; unvoiced signals; voiced signals; wideband speech; zero crossings rate;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20021040

Filename

1106147