Improved channel coding and estimation for adaptive multirate (AMR) speech transmission

Author

Hindelang, Thomas ; Kaindl, Markus ; Hagenauer, Joachim ; Schmautz, Max ; Xu, Wen

Author_Institution

Inst. for Commun. Eng., Munich Univ. of Technol., Munich, Germany

Volume

2

fYear

2000

fDate

2000

Firstpage

1210

Abstract

A variable channel coding scheme for adaptive multirate (AMR) speech transmission over mobile radio channels is proposed. Although it was developed for the GSM, the basic concept of variable channel coding can be adopted to other digital radio systems like UMTS. The AMR concept allows almost wire-line speech quality even for poor channel conditions by dynamically splitting the gross bit rate between source (speech) and channel coding according to the channel quality

Keywords

adaptive codes; cellular radio; channel coding; convolutional codes; digital radio; forward error correction; parameter estimation; speech coding; speech intelligibility; telecommunication channels; variable rate codes; voice communication; AMR concept; FEC; GSM; UMTS; adaptive multirate speech transmission; channel coding; channel estimation; channel quality; digital radio systems; forward error correction; gross bit rate; in-band transmission; mobile radio channels; poor channel conditions; recursive systematic convolutional codes; source coding; variable channel coding; wire-line speech quality; Bit rate; Channel coding; Digital communication; GSM; Mobile communication; Protection; Redundancy; Speech codecs; Speech coding; Telecommunication standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851317

Filename

851317