On the architecture, operation, and applications of VMR-WB: the new cdma2000 wideband speech coding standard
Sassan Ahmadi, Milan Jelinek · IEEE Communications Magazine · 2006
This article is an overview of the architecture and operation of the VMR-WB5 a source- and network-controlled variable-rate multimode codec designed for robust processing of wideband speech. To enable a smooth transition from legacy narrowband voice services, VMR-WB is also capable of processing conventional telephone-bandwidth speech. The VMR-WB codec is interoperable with AMR-WB at certain bit rates, thus eliminating quality degradation and additional delay due to transcoding