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A Transcoding-Free Multiple Description Coder for Voice over Mobile Ad-Hoc Networks

9 years 5 months ago
A Transcoding-Free Multiple Description Coder for Voice over Mobile Ad-Hoc Networks
— We propose a new multiple description (MD) coder design based on the Adaptive Multi-Rate Wideband (AMRWB) coder that can support transcoding-free communication between an ad-hoc network and another network that supports the AMR-WB codec. The encoder of the MD coder consists of the standard AMR-WB coder and a bit-stream splitting block that splits the AMR-WB bit-stream into two balanced descriptions. The decoder consists of a bit-stream substitution block that substitutes the missing bits, when only one description is received, to construct a valid AMR-WB frame that can be decoded using the standard AMR-WB decoder. We show that the performance of the new MD coder is better than a previous non-transcodingfree MD coder based on AMR-WB when transcoding is required and it is significantly better than using a single description of AMR-WB over the ad-hoc network supporting transcoding-free communication. I. VOICE OVER AD-HOC NETWORKS Mobile Ad-hoc Networks (MANETs) are formed by mobile w...
Jagadeesh Balam, Jerry D. Gibson
Added 01 Jun 2010
Updated 01 Jun 2010
Type Conference
Year 2008
Where WCNC
Authors Jagadeesh Balam, Jerry D. Gibson
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