Reconstruction of missing speech frames using sub-band excitation

Author

Clüver, Kai ; Noll, Peter

Author_Institution

Inst. fur Fernmeldetech., Tech. Univ. Berlin, Germany

fYear

1996

fDate

18-21 Jun 1996

Firstpage

277

Lastpage

280

Abstract

A new reconstruction method for frame erasures in speech transmission is presented which is based on parameterization of the speech signal by means of linear prediction (LPC) and voicing analysis. The problem of generating partially voiced substitute speech signals is solved by performing separate voicing decisions in sub-bands. The method yields considerable improvements compared with silence substitution for frame erasure ratios of up to 10% or even 20%. The combination of the reconstruction method with adaptive speech coders showed virtually the same good results for forward adaptation, whereas a higher degradation is caused by backward-adaptive coders

Keywords

adaptive systems; linear predictive coding; speech coding; speech processing; vocoders; LPC; adaptive speech coders; backward adaptive coders; forward adaptation; frame erasure ratios; frame erasures; linear prediction coding; missing speech frames reconstruction; partially voiced substitute speech signals; reconstruction method; silence substitution; speech signal; speech transmission; subband excitation; voicing analysis; voicing decisions; Communication networks; Degradation; Extrapolation; Linear predictive coding; Personal communication networks; Phase change materials; Reconstruction algorithms; Signal analysis; Signal generators; Speech analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Time-Frequency and Time-Scale Analysis, 1996., Proceedings of the IEEE-SP International Symposium on

Conference_Location

Paris

Print_ISBN

0-7803-3512-0

Type

conf

DOI

10.1109/TFSA.1996.547467

Filename

547467