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TR 26.935 (SA4)
Packet Switched (PS) conversational multimedia applications –
Performance characterisation of default codecs

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V14.0.0 (PDF)    2017/03    189 p.
V13.0.0    2015/12    189 p.
V12.0.0    2014/09    188 p.
V11.0.0    2012/09    188 p.
V10.0.0    2011/04    188 p.
V9.0.0    2009/12    188 p.
V8.0.0    2008/12    188 p.
V7.2.0    2007/12    188 p.
V6.0.0    2004/06    102 p.

Rapporteur:  Dr. Jung, Kyunghun
See also:  –

This TR provides information on the performances of default speech codecs in packet switched conversational multimedia applications. The codecs under test are AMR-NB (Adaptive Multi-Rate Narrowband) and AMR-WB (Adaptive Multi-Rate Wideband). In addition, several ITU-T codecs (G.723.1, G.729, G.722 and G.711) are included in the testing. Experimental test results from the speech quality testing are reported to illustrate the behaviour of these codecs.

The results give information of the performance of PS conversational multimedia applications under various operating and transmission conditions (e.g., considering radio transmission errors, IP packet losses, end-to-end delays, and several types of background noise). The performance results can be used e.g. as guidance for network planning and to appropriately adjust the radio network parameters.


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1   Scope   PDF-p. 7
2   References
3   Abbreviations   PDF-p. 8
4   GeneralOverview   PDF-p. 9
5   Test bed and test plan for Phase 1
6   Test bed and test plan for Phase 2   PDF-p. 20
7   Analysis of test results for DCH channels for Phase 1 and 2      Up

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