A generic algorithm for mid-call audio codec switching

Haytham Assem; Mohamed Adel; Brendan Jennings; David Malone; Jonathan Dunne; Pat O'Sullivan

A generic algorithm for mid-call audio codec switching

Haytham Assem, Mohamed Adel, Brendan Jennings, David Malone, Jonathan Dunne, Pat O'Sullivan

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

7 Citations (Scopus)

Abstract

We present and evaluate an algorithm that performs in-call selection of the most appropriate audio codec given prevailing conditions on the network path between the endpoints of a voice call. We have studied the behaviour of different codecs under varying network conditions, in doing so deriving the impairment factors for non-ITU-T codecs so that the E-model can be used to assess voice call quality for them. Moreover, we have studied the drawbacks of codec switching from the end user perception point of view; our switching algorithm seeks to minimise this impact. We have tested our algorithm on different packages that contain a selection of the most commonly used codecs: G.711, SILK, ILBC, GSM and SPEEX. Our results show that in many typical network scenarios, our switching codecs mid-call algorithm results in better Quality of Experience (QoE) than would have been achieved had the initial codec been used throughout the call.

Original language	English
Title of host publication	Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013
Pages	1276-1281
Number of pages	6
Publication status	Published - 2013
Externally published	Yes
Event	2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013 - Ghent, Belgium Duration: 27 May 2013 → 31 May 2013

Publication series

Name	Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013

Conference

Conference	2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013
Country/Territory	Belgium
City	Ghent
Period	27/05/13 → 31/05/13

Keywords

Audio Codecs
Codec Switching
E-model
VoIP

Cite this

Assem, H., Adel, M., Jennings, B., Malone, D., Dunne, J., & O'Sullivan, P. (2013). A generic algorithm for mid-call audio codec switching. In Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013 (pp. 1276-1281). Article 6573177 (Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013).

@inproceedings{a7e2e92752014306a0292eb4bd5994b0,

title = "A generic algorithm for mid-call audio codec switching",

abstract = "We present and evaluate an algorithm that performs in-call selection of the most appropriate audio codec given prevailing conditions on the network path between the endpoints of a voice call. We have studied the behaviour of different codecs under varying network conditions, in doing so deriving the impairment factors for non-ITU-T codecs so that the E-model can be used to assess voice call quality for them. Moreover, we have studied the drawbacks of codec switching from the end user perception point of view; our switching algorithm seeks to minimise this impact. We have tested our algorithm on different packages that contain a selection of the most commonly used codecs: G.711, SILK, ILBC, GSM and SPEEX. Our results show that in many typical network scenarios, our switching codecs mid-call algorithm results in better Quality of Experience (QoE) than would have been achieved had the initial codec been used throughout the call.",

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author = "Haytham Assem and Mohamed Adel and Brendan Jennings and David Malone and Jonathan Dunne and Pat O'Sullivan",

year = "2013",

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isbn = "9783901882517",

series = "Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013",

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note = "2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013 ; Conference date: 27-05-2013 Through 31-05-2013",

}

Assem, H, Adel, M, Jennings, B, Malone, D, Dunne, J & O'Sullivan, P 2013, A generic algorithm for mid-call audio codec switching. in Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013., 6573177, Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013, pp. 1276-1281, 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013, Ghent, Belgium, 27/05/13.

A generic algorithm for mid-call audio codec switching. / Assem, Haytham; Adel, Mohamed; Jennings, Brendan et al.
Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013. 2013. p. 1276-1281 6573177 (Proceedings of the 2013 IFIP/IEEE International Symposium on Integrated Network Management, IM 2013).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Adel, Mohamed

AU - Jennings, Brendan

AU - Malone, David

AU - Dunne, Jonathan

AU - O'Sullivan, Pat

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AB - We present and evaluate an algorithm that performs in-call selection of the most appropriate audio codec given prevailing conditions on the network path between the endpoints of a voice call. We have studied the behaviour of different codecs under varying network conditions, in doing so deriving the impairment factors for non-ITU-T codecs so that the E-model can be used to assess voice call quality for them. Moreover, we have studied the drawbacks of codec switching from the end user perception point of view; our switching algorithm seeks to minimise this impact. We have tested our algorithm on different packages that contain a selection of the most commonly used codecs: G.711, SILK, ILBC, GSM and SPEEX. Our results show that in many typical network scenarios, our switching codecs mid-call algorithm results in better Quality of Experience (QoE) than would have been achieved had the initial codec been used throughout the call.

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A generic algorithm for mid-call audio codec switching

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Keywords

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