Queuing analysis of simple FEC schemes for voice over IP
Computer Networks: The International Journal of Computer and Telecommunications Networking
Source-driven packet marking for speech transmission over differentiated-services networks
ICASSP '01 Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02
LSP-based multiple-description coding for real-time low bit-rate voice over IP
IEEE Transactions on Multimedia
Achievable rates for multiple descriptions
IEEE Transactions on Information Theory
Priority discarding of speech in integrated packet networks
IEEE Journal on Selected Areas in Communications
A survey of packet loss recovery techniques for streaming audio
IEEE Network: The Magazine of Global Internetworking
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AMR-WB codec, which has been standardized for wideband speech conversational applications, has a broad range of potential applications in the migration of wireless and wireline networks towards a single converged IP network. Forward error control (FEC) and multiple description coding (MDC) are two promising techniques to make the transmission robust against packet loss in Voice over IP (VoIP). However, how to achieve the optimal reconstructed speech quality with these methods for AMR-WB under different packet loss rate conditions is still an open problem. In this paper, we compare the performance of various FEC and MDC schemes for the AMR-WB codec both analytically and experimentally. Based on the comparison results, some advantageous configurations of FEC and MDC for the AMR-WB codec are obtained, and hence an optimization system is proposed by selecting the optimal packet loss recovery scheme in accordance with the variable network conditions. Subjective AB test results show that the optimization can lead to obvious improvements of the perceived speech quality in the IP environment.