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A Multiple Description Speech Coder Based on AMR-WB for Mobile Ad Hoc Networks
Overview 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.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | August 2004 | ||
| Format | White Papers | ||
| Topics | |||
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