Title :
The adaptive multirate wideband speech codec: system characteristics, quality advances, and deployment strategies
Author :
Ojala, Pasi ; Lakaniemi, Ari ; Lepänaho, Henrik ; Jokimies, Matti
Author_Institution :
Nokia Res. Center
fDate :
5/1/2006 12:00:00 AM
Abstract :
Wideband speech is the major differentiation and attraction of third-generation network services in both the circuit and packet switched domain. Increased audio bandwidth introduces a significant leap in perceived quality of service compared to currently utilized narrowband telephony in second-generation mobile communications and the PSTN. The adaptive multirate wideband (AMR-WB) speech codec is the service enabler for improved user experience. It is an established 3GPP and ITU-T wideband speech codec standard and represents the state-of-the-art in speech quality as well as robustness in error prone radio channels. It is also the first codec algorithm standardized for wideband speech for mobile communications
Keywords :
3G mobile communication; adaptive codes; adaptive signal processing; broadband networks; data compression; speech codecs; speech coding; wireless channels; QoS; adaptive multirate wideband speech codec; deployment strategies; mobile communications; quality of service; radio channels; third-generation network services; Bandwidth; Communication switching; Mobile communication; Narrowband; Packet switching; Quality of service; Speech codecs; Switching circuits; Telephony; Wideband;
Journal_Title :
Communications Magazine, IEEE
DOI :
10.1109/MCOM.2006.1637948
