Nokia wideband speech coding proposal selected as CDMA2000 standard
New technology to enable high-quality voice over CDMA2000 networks adopted by 3GPP2
Nokia today announced its latest contribution to CDMA technology as its proposal for standardizing a CDMA2000 wideband speech codec was selected by the 3GPP2 from a field of five competing proposals. The new Variable-Rate Multi-Mode Wideband speech codec (VMR-WB) offers superior wideband speech quality at data rates comparable to current narrowband speech codecs, resulting in highly intelligible and natural speech that represents a quantum leap over the quality of both today's wireless and wireline networks.
The VMR-WB standard is not only fully compliant with the CDMA2000 rate-set II but is also interoperable with the AMR-WB standard selected by the 3GPP for use in GSM/WCDMA networks. The interoperability between CDMA2000 and WCDMA networks that is enabled by the VMR-WB technology allows high-value voice services to be used between mobile customers across the globe, regardless of the network standard that each customer is using.
The VMR-WB codec is engineered to guarantee a high level of performance under severe channel error and background noise conditions to allow the delivery of a variety of applications under a wide range of conditions. Some of the applications made substantially more compelling by VMR-WB include mobile-to-mobile wideband voice calls, voice over IP (VoIP), mobile or fixed network audio conferencing, point-to-point and multi-point business applications, multimedia streaming and videoconferencing.