Contemporary Voice-Over-IP (VoIP) systems typically negotiate 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 standard 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.
- VoIP communication
- Codec Switching
This is a preview of subscription content, access via your institution.
Tax calculation will be finalised at checkout
Purchases are for personal use onlyLearn about institutional subscriptions
Unable to display preview. Download preview PDF.
Casetti, C., De Martin, J.C., Meo, M.: Framework for the analysis of adaptive voice over ip. In: 2000 IEEE International Conference on Communications, pp. 821–826 (June 2000)
ITU-T P.862: Perceptual evaluation of speech quality (pesq): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs (2001)
Mazurczyk, W., Kotulski, Z.: Adaptive voip with audio watermarking for improved call quality and security. Journal of Information Assurance and Security 2(3), 226–234 (2007)
Ng, S.L., Hoh, S., Singh, D.: Effectiveness of adaptive codec switching voip application over heterogeneous networks. In: 2005 2nd International Conference on Mobile Technology, Applications and Systems, pages 7 (November 2005)
Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., Schooler, E.: SIP: Session Initiation Protocol. RFC 3261 (Proposed Standard) (June 2002); Updated by RFCs 3265, 3853, 4320, 4916, 5393, 5621, 5626, 5630, 5922, 5954, 6026, 6141
Wbest: a bandwidth estimation tool for IEEE 802.11 wireless networks, http://web.cs.wpi.edu/~claypool/papers/wbest/
Yee, Y.C., Choong, K.N., Low, A.L.Y., Tan, S.W.: Sip-based proactive and adaptive mobility management framework for heterogeneous networks. J. Netw. Comput. Appl. 31, 771–792 (2008)
Editors and Affiliations
© 2012 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Aktas, I., Schmidt, F., Weingärtner, E., Schnelke, CJ., Wehrle, K. (2012). An Adaptive Codec Switching Scheme for SIP-Based VoIP. In: Andreev, S., Balandin, S., Koucheryavy, Y. (eds) Internet of Things, Smart Spaces, and Next Generation Networking. ruSMART NEW2AN 2012 2012. Lecture Notes in Computer Science, vol 7469. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32686-8_32
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-32685-1
Online ISBN: 978-3-642-32686-8