A Scalable Wideband Speech Coder for Mobile Ad Hoc Networks
Yuhong Yang, Ruimin Hu, Haojun Al, Yunfan Luo · 2006
Achieving effective voice communication over mobile ad hoc networks (MANETs) offers both new challenges and opportunities for speech coding. This paper investigates a new 13.6 kb/s subband structure bandwidth scalable (SB-SWS) scheme for MANETs, which is based on a high-quality narrowband speech coder, the 11.8 kb/s G.729 Annex E, with the higher band using a bandwidth extension (BWE) approach to reduce bit rate required. The performance of the scalable coder is tested for MANETs with a simulation test. The results demonstrate that the scalable approach contributes to effective and reliable voice communication in MANETs