Title :
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
fDate :
3/1/1998 12:00:00 AM
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;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
