ETSI TR 101 329-7 V1.1.1 (2000-11) Technical Report TIPHON; Design Guide; Part 7: Design Guide for Elements of a TIPHON connection from an end-to-end speech transmission performance point of view 2 ETSI TR 101 329-7 V1.1.1 (2000-11) Reference DTR/TIPHON-05011 Keywords internet, IP, network, performance, protocol, quality, speech, voice 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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ETSI 3 ETSI TR 101 329-7 V1.1.1 (2000-11) Contents Intellectual Property Rights ..........................................................................................................................5 Foreword......................................................................................................................................................5 1 Scope..................................................................................................................................................6 2 References..........................................................................................................................................6 3 Definitions, symbols and abbreviations ...............................................................................................6 3.1 Definitions .................................................................................................................................................. 6 3.2 Abbreviations.............................................................................................................................................. 7 4 General Considerations.......................................................................................................................8 4.1 Transmission planning................................................................................................................................. 8 4.2 User interaction........................................................................................................................................... 8 4.3 Maintenance................................................................................................................................................ 9 4.4 Verification................................................................................................................................................. 9 5 Guidance on main Transmission Parameters .......................................................................................9 5.1 Loudness Ratings ........................................................................................................................................ 9 5.1.1 General Considerations .......................................................................................................................... 9 5.1.2 IP Terminals .......................................................................................................................................... 9 5.1.3 IP Gateways........................................................................................................................................... 9 5.1.4 Network Elements.................................................................................................................................. 9 5.2 Mean One-Way Delay............................................................................................................................... 10 5.2.1 General Considerations ........................................................................................................................ 10 5.2.1.1 Delay Jitter..................................................................................................................................... 10 5.2.2 IP Terminals ........................................................................................................................................ 10 5.2.3 IP Gateways......................................................................................................................................... 10 5.2.4 Network Elements................................................................................................................................ 11 5.3 Echo Loss, Echo Cancellation.................................................................................................................... 11 5.3.1 General Considerations ........................................................................................................................ 11 5.3.2 IP Terminals ........................................................................................................................................ 11 5.3.3 IP Gateways......................................................................................................................................... 11 5.3.4 Network Elements................................................................................................................................ 11 5.4 Coding Distortion...................................................................................................................................... 12 5.4.1 General Considerations ........................................................................................................................ 12 5.4.2 IP Terminals ........................................................................................................................................ 12 5.4.3 IP Gateways......................................................................................................................................... 12 5.4.4 Network Elements................................................................................................................................ 12 5.5 Speech Processing other than Coding......................................................................................................... 13 5.5.1 General Considerations ........................................................................................................................ 13 5.5.2 IP Terminals ........................................................................................................................................ 13 5.5.3 IP Gateways......................................................................................................................................... 13 5.5.4 Network Elements................................................................................................................................ 13 5.6 Transcoding in Network Elements ............................................................................................................. 13 6 Calculation Examples related to the Main Transmission Parameters..................................................14 6.1 Examples with respect to Loudness Ratings............................................................................................... 15 6.2 Examples with respect to Mean One-way Delay......................................................................................... 15 6.2.1 Delay due to speech processing and packetization.................................................................................16 6.2.2 Planning examples regarding the occurrence of long delay.................................................................... 18 6.2.2.1 Introduction.................................................................................................................................... 18 6.2.2.1.1 Application of the Advantage Factor A with respect to the following examples .......................... 18 6.2.2.1.2 Distinction between different communication situations for the following examples with regard to the grade of interactivity between the two parties......................................................... 19 6.2.2.1.3 Introduction of an additional Equipment Impairment Factor with respect to double-talk situations for the following examples......................................................................................... 19 6.2.2.1.4 Purpose and general structure of the following examples............................................................ 20 6.2.2.2 Connections to regions to which significantly shorter delay is available ("Competition") ................. 21 ETSI 4 ETSI TR 101 329-7 V1.1.1 (2000-11) 6.2.2.2.1 Speech transmission performance as