Title :
A candidate proposal for a 3GPP adaptive multi-rate wideband speech codec
Author :
Erdmann, Christoph ; Vary, Peter ; Fischer, Kyrill ; Xu, Wen ; Marke, Matthias ; Fingscheidt, Tim ; Varga, Imre ; Kaindl, Markus ; Quinquis, Catherine ; Kövesi, Balázs ; Massaloux, Dominique
Author_Institution :
Aachen Univ. of Technol., Germany
Abstract :
This paper describes an adaptive multi-rate wideband (AMR-WB) speech codec proposed for the GSM system and also for the evolving third generation (3G) mobile speech services. The speech codec is based on SB-CELP (splitband-code-excited linear prediction) with five modes operating bit rates from 24 kbit/s down to 9.1 kbit/s. The respective channel coding schemes are based on RSC (recursive systematic code) and UEP (unequal error protection). Both, source and channel codec are designed as homogenous as possible to guarantee robust transmission on current and future mobile radio channels
Keywords :
adaptive signal processing; cellular radio; channel coding; linear predictive coding; source coding; speech codecs; speech coding; 3GPP AMR-WB standardization; 3GPP speech codec; 9.1 to 24 kbit/s; GSM system; SB-CELP; adaptive multi-rate wideband speech codec; channel codec; channel coding; mobile radio channels; recursive systematic code; source codec; splitband-code-excited linear prediction; third generation mobile speech services; unequal error protection; Bandwidth; Bit rate; GSM; Land mobile radio; Proposals; Robustness; Speech codecs; Standardization; Telecommunication standards; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.941025
