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AMR mode selection enhancement in 3G networks

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Abstract

This paper describes methods for mode selection in multirate speech codecs, such as the AMR (Adaptive Multi-Rate), that is the mandatory speech codec selected in 3GPP (3rd Generation Partnership Project) defined mobile networks. Originally, the multirate functionality has been developed for coping with changing radio conditions. The algorithms described in this paper find applicability in IP-based mobile networks, where speech encoded data is encapsulated using the RTP (Real Time Protocol). The main advantages offered by these techniques are improved speech quality and congestion control along the network path between two mobile terminals.

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Authors and Affiliations

  1. Nokia Corporation, P.O. Box 88, 33721, Tampere, Finland

    Igor D. D. Curcio, Juha Kalliokulju & Miikka Lundan

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  1. Igor D. D. Curcio
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  2. Juha Kalliokulju
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  3. Miikka Lundan
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Correspondence to Igor D. D. Curcio.

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Curcio, I.D.D., Kalliokulju, J. & Lundan, M. AMR mode selection enhancement in 3G networks. Multimed Tools Appl 28, 259–281 (2006). https://doi.org/10.1007/s11042-006-7714-9

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