| Publisher | Institute of Electrical and Electronics Engineers | ||
|---|---|---|---|
| Format | 250.3KB PDF | Date added | 25 Aug 2004 |
| Topics | VoIP - IP Telephony, Voice Recognition, Mobile - Wireless Communications | ||
| Downloads | 90 | ||
To address the challenging task of achieving effective voice communication over Mobile Ad hoc NETworks (MANETs), it introduces a new Multiple Description (MD) speech coder based on the AMR-WB standard. The MD coder splits the bitstream of the AMR-WB coder into two redundant sub-streams by directly selecting overlapping subsets of encoded data generated for each frame. The sub-streams are transmitted on different network paths. When both sub-streams arrive at the decoder, an output identical to that of AMR-WB is recovered. If only one substream arrives at the decoder, degraded but still acceptable speech quality is obtained. The performance of the multiple description coding system is tested for MANETS with a network simulator and an informal listening test.
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