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TR 26.935SA4
Packet Switched (PS) Conversational Multimedia Applications –
Performance Characterisation of Default Codecs

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V15.0.0 (PDF)  2018/06  187 p.
V14.0.0  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

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.

full Table of Contents for  TR 26.935  Word version:   15.0.0

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1  ScopeWord-p. 8
2  References
3  AbbreviationsWord-p. 9
4  General OverviewWord-p. 10
5  Test bed and test plan for Phase 1
6  Test bed and test plan for Phase 2Word-p. 21
7  Analysis of test results for DCH channels for Phase 1 and 2Up
8  Performance characterisation of VoIMS over HSDPA/EUL channels
9  Conclusions
A  Conversation test composite dependent variable scores by condition and LabWord-p. 75
B  Instructions to subjectsWord-p. 77
C  Example Scenarios for the conversation testWord-p. 78
D  Test Plan for the AMR Narrow-Band Packet Switched Conversation TestWord-p. 80
E  Test Plan for the AMR Wide-Band Packet Switched Conversation TestWord-p. 97
F  Test plan for Packet Switched Conversation Tests for Comparison of Quality Offered by Different Speech CodersWord-p. 114
G  Test Plan for Global Analysis of PSS Conversation TestsWord-p. 126
H  Test Plan for Performance characterisation of VoIMS over HSDPA/EUL channels; listening only testsWord-p. 132
I  Illustrative scheme for jitter buffer managementWord-p. 136
J  Test processing for listening only testsWord-p. 146
K  Radio network simulation for HSDPA/EUL performance characterizationWord-p. 152
L  Test Plan for the AMR NB/WB Conversation Test in UMTS over HSDPA/EULWord-p. 156
M  Change historyWord-p. 188

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