This file was created by the TYPO3 extension bib --- Timezone: CEST Creation date: 2024-07-04 Creation time: 10-28-04 --- Number of references 1 inproceedings 2012-aktas-new2an-AnAdaptiveCodecSwitchingSchemeforSIPbasedVoIP-conference Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012) 2012 8 27 1-12 Contemporary Voice-Over-IP (VoIP) systems typically ne- gotiate only one codec for the entire VoIP session life time. However, as different codecs perform differently well under certain network conditions like delay, jitter or packet loss, this can lead to a reduction of quality if those conditions change during the call. This paper makes two core contributions: First, we compare the speech quality of a set of stan- dard VoIP codecs given different network conditions. Second, we propose an adaptive end-to-end based codec switching scheme that fully conforms to the SIP standard. Our evaluation with a real-world prototype based on Linphone shows that our codec switching scheme adapts well to changing network conditions, improving overall speech quality. crawler fileadmin/papers/2012/2012-aktas-new2an-codecswitching.pdf Online LNCS Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012), St. Pettersburg, Russia. St. Pettersburg, Russia 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012) 27-29 August, 2012 en 978-3-642-32685-1 10.1007/978-3-642-32686-8_32 1 IsmetAktas FlorianSchmidt EliasWeingaertner Caj-JulianSchnelke KlausWehrle