ETSI TR 126 901 V4.0.1 (2001-04) Technical Report Universal Mobile Telecommunications System (UMTS); AMR wideband speech codec; Feasibility study report (3GPP TR 26.901 version 4.0.1 Release 4) 3GPP TR 26.901 version 4.0.1 Release 4 1 ETSI TR 126 901 V4.0.1 (2001-04) Reference DTR/TSGS-0426901Uv4 Keywords UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.:+33492944200 Fax:+33493654716 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). 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These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under www.etsi.org/key . ETSI 3GPP TR 26.901 version 4.0.1 Release 4 3 ETSI TR 126 901 V4.0.1 (2001-04) Contents Foreword......................................................................................................................................................5 Introduction..................................................................................................................................................5 1 Scope..................................................................................................................................................6 2 References..........................................................................................................................................6 3 Definitions and abbreviations..............................................................................................................7 3.1 Definitions........................................................................................................................................................ 7 3.2 Abbreviations................................................................................................................................................... 7 4 Goals of AMR wideband codec...........................................................................................................8 5 Terminology.......................................................................................................................................8 6 Overview............................................................................................................................................9 6.1 Benefits............................................................................................................................................................ 9 6.2 Basic operation................................................................................................................................................. 9 6.3 Application scenarios........................................................................................................................................ 9 6.4 Development Timescales .................................................................................................................................. 9 7 Standardization background..............................................................................................................10 7.1 GSM .............................................................................................................................................................. 10 7.1.1 EDGE ....................................................................................................................................................... 10 7.2 3GPP.............................................................................................................................................................. 10 7.3 ITU-T............................................................................................................................................................. 11 7.3.1 ITU-T new wideband activity around 16 kbit/s........................................................................................... 11 8 Feasibility aspects for GSM full-rate traffic channel..........................................................................12 8.1 Basis for the feasibility study .......................................................................................................................... 12 8.2 Speech quality performance............................................................................................................................ 13 8.2.1 Benefit of wideband over narrowband........................................................................................................ 13 8.2.2 Wideband coding performance for clean speech (below 14.4 kbit/s) ........................................................... 13 8.2.3 Wideband coding performance under background noise conditions (below 14.4 kbit/s)............................... 14 8.2.4 Wideband coding performance under several channel conditions (below 14.4 kbit/s).................................. 14 8.2.5 Wideband coding performance under tandeming conditions (below 14.4 kbit/s) ......................................... 15 8.2.6 Wideband coding at modes above 14.4 kbit/s............................................................................................. 15 8.2.7 ITU-T standardization information relevant to AMR-WB feasibility study ................................................. 15 8.2.8 Summary................................................................................................................................................... 15 8.3 Performance requirements specification .......................................................................................................... 15 8.4 Design constraints........................................................................................................................................... 15 9 Feasibility aspects for other channels ................................................................................................16 9.1 EDGE channels .............................................................................................................................................. 16 9.2 GSM multi-slot channels................................................................................................................................. 16 9.3 3G channels.................................................................................................................................................... 16 10 Development phases .........................................................................................................................16 11 Open issues and risks........................................................................................................................17 12 Conclusions......................................................................................................................................17 13 Recommendations ............................................................................................................................17 Annex A: Executive Summary and Recommendations ...........................................................................18 A.1 Introduction......................................................................................................................................18 A.2 Benefits ............................................................................................................................................18