Non-intrusive single-ended speech quality assessment in VoIP
Speech Communication
Energy efficient implementation of G.729 for wireless VoIP application
ICAIT '08 Proceedings of the 2008 International Conference on Advanced Infocomm Technology
Smart softphone device for the network quality parameters discovery and measurement
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
Performance analysis of perceptual speech quality and modules design for management over IP network
HCI'07 Proceedings of the 12th international conference on Human-computer interaction: intelligent multimodal interaction environments
Analytical and experimental comparison of packet loss recovery methods based on AMR-WB for VoIP
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Comparison and optimization of packet loss recovery methods based on AMR-WB for VoIP
Speech Communication
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We present a source-driven approach to packet marking for speech transmission over packet networks implementing the Differentiated Services model. Packets generated by the speech coder are examined: if deemed perceptually critical, they are marked as premium and sent on a "virtual wire;" otherwise, they are sent as regular best-effort traffic. Applied to speech coded with the ITU-T 8 kb/s speech coding standard G.729, the proposed source-driven packet marking scheme outperforms source-transparent techniques and provides clearly better perceptual quality than the unprotected case sending as little as 1/5 of the coded bitstream as premium traffic.