A noise suppresser for the AMR speech codec and evaluation test results based on 3GPP specifications

Author

Furuta, S. ; Takahashi, S.

Author_Institution

Inf. Technol. R & D Center, Mitsubishi Electr. Corp., Kanagawa, Japan

fYear

2002

Firstpage

159

Lastpage

161

Abstract

We propose a noise suppresser (AMR-NS) for the 3GPP standard AMR (adaptive multirate) speech codec. The proposed AMR-NS method is based on spectral subtraction and is structured from spectral amplitude suppression and spectral subtraction that are adaptively controlled by the input signal. The subjective evaluation results based on 3GPP performance requirements (3GPP TS26.077) in a third party testing laboratory show that the proposed AMR-NS has satisfied all the requirements for Japanese and English speech materials. It has also satisfied all the objective evaluation requirements.

Keywords

3G mobile communication; acoustic noise; adaptive codes; conformance testing; interference suppression; random noise; signal denoising; spectral analysis; speech codecs; speech coding; variable rate codes; AMR speech codec; English speech; Japanese speech; adaptive multirate speech codec; babble noise; car noise; noise suppresser; noise suppressor; objective evaluation; spectral amplitude suppression; spectral subtraction; street noise; Acoustic noise; Delay; Laboratories; Noise figure; Noise level; Noise measurement; Performance evaluation; Speech codecs; Speech enhancement; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Speech Coding, 2002, IEEE Workshop Proceedings.

Print_ISBN

0-7803-7549-1

Type

conf

DOI

10.1109/SCW.2002.1215757

Filename

1215757