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Technical Specification Group Services and System Aspects TSGS#22(03)0679 Meeting #22, Maui, Hawaii, USA, 15-18 December 2003 Agenda Item: 7.4.3 3GPP TSG-SA4 Meeting #29 Tdoc S4-030747 Tampere, November 24 – 28. Source: TSG SA WG4 (France Telecom RD) Title: Test plan for 3G packet switched conversation tests - Phase 2: Comparison of quality offered by different speech coders. Document For: Approval Agenda Item: 7.4.3 1 Introduction This document proposes a conversation test plan to compare the quality obtained with several different speech coders, over packet switched networks. The different speech coders used in this test are Adaptive Multi-Rate Narrow-Band (AMR-NB), in modes 6.7 kbit/s and 12.2 kbit/s, Adaptive Multi-Rate Wide-Band (AMR-WB), in modes 12.65 kbit/s and 15.85 kbit/s, ITU-T G.723.1, in mode 6.4 kbit/s, ITU-T G.729, in mode 8 kbit/s, ITU-T G.722, in mode 64 kbit/s, with packet loss concealment and, ITU-T G.711, with packet loss concealment. As there is no standardized packet loss concealment, plc for G.711 and G.722 are proprietary algorithms. The simulated network will include two values of IP packet loss. The test will be done in one test laboratory, only, but in two different languages. This discussion gives references, conventions and contacts, section 3 details the test methodology, including test arrangement and test procedure, Annex A contains the instructions for the subjects participating to the conversation tests. Annex B contains the description of results to be provided to the Analysis Laboratory (if any) by the testing laboratories. Annex C contains the list of statistical comparisons to be performed. 2. References, Conventions, and Contacts 2.1Perma