Design and description of CS-ACELP: a toll quality 8 kb/s speech coder

Author

Salami, Redwan ; Laflamme, Claude ; Adoul, Jean-Pierre ; Kataoka, Akitoshi ; Hayashi, Shinji ; Moriya, Takehiro ; Lamblin, Claude ; Massaloux, Dominique ; Proust, Stéphane ; Kroon, Peter ; Shoham, Yair

Author_Institution

Dept. of Electr. Eng., Sherbrooke Univ., Que., Canada

Volume

6

Issue

2

fYear

1998

fDate

3/1/1998 12:00:00 AM

Firstpage

116

Lastpage

130

Abstract

This paper describes the 8 kb/s speech coding algorithm G.729 which has been standardized by ITU-T. The algorithm is based on a conjugate-structure algebraic CELP (CS-ACELP) coding technique and uses 10 ms speech frames. The codec delivers toll-quality speech (equivalent to 32 kb/s ADPCM) for most operating conditions. This paper describes the coder structure in detail and discusses the reasons behind certain design choices. A 16-b fixed-point version has been developed as part of Recommendation G.729 and a summary of the subjective test results based on a real-time implementation of this version are presented

Keywords

algebraic codes; linear predictive coding; speech codecs; telecommunication standards; 16 kbit/s; 16-b fixed-point version; 8 kbit/s; CS-ACELP; ITU-T; Recommendation G.729; codec; conjugate-structure algebraic CELP; description; design; real-time implementation; speech coding algorithm G.729; standard; subjective test results; toll quality 8 kb/s speech coder; toll-quality speech; Decoding; Personal communication networks; Robustness; Signal design; Speech analysis; Speech codecs; Speech coding; Standardization; Telecommunications; Testing;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.661471

Filename

661471