TR 102 716 2 V1 1 1 Speech and multimedia Transmission

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2 ETSI TR 102 716 2 V1 1 1 2010 03,DTR STQ 00132 2. analysis interoperability quality voice,650 Route des Lucioles. F 06921 Sophia Antipolis Cedex FRANCE,Tel 33 4 92 94 42 00 Fax 33 4 93 65 47 16. Siret N 348 623 562 00017 NAF 742 C,Association but non lucratif enregistr e la. Sous Pr fecture 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. In case of dispute the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive. within ETSI Secretariat, Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at. http portal etsi org tb status status asp, If you find errors in the present document please send your comment to one of the following services. http portal etsi org chaircor ETSI support asp,Copyright Notification. No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2010. All rights reserved,TM TM TM TM, DECT PLUGTESTS UMTS TIPHON the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered.
for the benefit of its Members, 3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered. for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. 3 ETSI TR 102 716 2 V1 1 1 2010 03,Intellectual Property Rights 4. Foreword 4,2 References 5,2 1 Normative references 5. 2 2 Informative references 5,3 Abbreviations 5,4 Context 6. 5 Platform presentation 6,6 Presentation of test conditions 7.
6 1 Indicator description 7,6 1 1 Post Dialling Delay 7. 6 1 2 Listening speech quality 7,6 1 3 Listening speech quality stability 8. 6 1 4 End to end delay 8,6 1 5 End to end delay variation 8. 6 1 6 Level of active speech signal at reception 8. 6 1 7 Noise level at reception 9,6 1 8 DTMF integrity 9. 6 2 Description of the methodology 9,6 3 Pie diagram presentation 10.
7 Overview of results obtained in October 2009 11,8 Overview of results obtained during one year 14. 8 1 Post Dialling Delay 15,8 2 Listening speech quality 16. 8 3 Listening speech quality stability 17,8 4 End to end delay 18. 8 5 End to end delay variation 19,8 6 Noise level at reception 20. 9 Conclusion 22,History 23,4 ETSI TR 102 716 2 V1 1 1 2010 03.
Intellectual Property Rights, IPRs essential or potentially essential to the present document may have been declared to ETSI The information. pertaining to these essential IPRs if any is publicly available for ETSI members and non members and can be found. in ETSI SR 000 314 Intellectual Property Rights IPRs Essential or potentially Essential IPRs notified to ETSI in. respect of ETSI standards which is available from the ETSI Secretariat Latest updates are available on the ETSI Web. server http webapp etsi org IPR home asp, Pursuant to the ETSI IPR Policy no investigation including IPR searches has been carried out by ETSI No guarantee. can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 or the updates on the ETSI Web. server which are or may be or may become essential to the present document. This Technical Report TR has been produced by ETSI Technical Committee Speech and multimedia Transmission. Quality STQ, The present document is part 2 of a multi part deliverable covering Guidelines objectives and results of speech quality. analysis in the context of interworking Plugtests for multiplay services as identified below. Part 1 Guidelines and objectives,Part 2 Results,5 ETSI TR 102 716 2 V1 1 1 2010 03. The present document presents the results obtained on 2 technological watch platforms on Triple Play offerings The. determinate indicators and the used measurement methods are presented in part 1 of this multi part deliverable i 6. The results shown come from a survey of various service performance and show the applicability of the method. provided in the part 1 of this multi part deliverable i 6 intended for Plugtests. 2 References, References are either specific identified by date of publication and or edition number or version number or.
non specific, For a specific reference subsequent revisions do not apply. Non specific reference may be made only to a complete document or a part thereof and only in the following. if it is accepted that it will be possible to use all future changes of the referenced document for the. purposes of the referring document,for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at. http docbox etsi org Reference, NOTE While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee. their long term validity,2 1 Normative references, The following referenced documents are indispensable for the application of the present document For dated. references only the edition cited applies For non specific references the latest edition of the referenced document. including any amendments applies,Not applicable,2 2 Informative references.
The following referenced documents are not essential to the use of the present document but they assist the user with. regard to a particular subject area For non specific references the latest version of the referenced document including. any amendments applies, i 1 ETSI EG 202 765 2 Speech Processing Transmission and Quality Aspects STQ QoS and. network performance metrics and measurement methods Part 2 Transmission Quality Indicator. combining Voice Quality Metrics, i 2 ITU T Recommendation P 862 Perceptual evaluation of speech quality PESQ An objective. method for end to end speech quality assessment of narrow band telephone networks and speech. i 3 ITU T Recommendation P 862 1 Mapping function for transforming P 862 raw result scores to. i 4 ITU T Recommendation P 56 Objective measurement of active speech level. i 5 ITU T Recommendation P 505 One view visualization of speech quality measurement results. 6 ETSI TR 102 716 2 V1 1 1 2010 03, i 6 ETSI TR 102 716 1 Speech and multimediaTransmission Quality STQ Guidelines objectives. and results of speech quality analysis in the context of interworking Plugtests for multiplay. services Part 1 Guidelines and objectives,3 Abbreviations. For the purposes of the present document the following abbreviations apply. ADSL Asymmetric Digital Subscriber Line,CPE Customer Premise Equipment.
DTMF Dual Tone Multi Frequency,HGW Home GateWay,NOTE Referenced also as Residential Gateway. IP Internet Protocol,IPTV IP TeleVision, NOTE System where a digital television service is delivered using Internet Protocol. ISP Internet Service Provider, ITU T International Telecommunication Union Telecommunication standardization sector. MGCP Media Gateway Control Protocol,MOS Mean Opinion Score. MOS LQON Mean Opinion Store Listening Quality Objective Narrowband. PDD Post Dialling Delay,PESQ Perceptual Evaluation of Speech Quality.
PSTN Public Switched Telephone Network,SIP Session Initiation Protocol. VoIP Voice over Internet Protocol, To have an overview of the performances of Triple Play offers deployed in France and used by customers several. platforms dedicated to technological watch on Triple Play offerings were organized These platforms consist in. installing in the same place all the offers proposed by different ISP to residential customer The offer subscriptions are. made from the point of view of the user Particular care is taken to make sure that the ISP cannot be aware of the real. use of these offers This is an important point because in such way we can objectively determine the quality offered to. the users In fact if the ISP is aware that an offer is made as part of a platform it is then possible that the operator will. adjust or optimize the functioning of this offer, The results presented in the present document concern the performances of VoIP service associated to Triple Play. offers implemented on two technological watch platforms installed in France. The results are not obtained during Plugtests but the implemented methodology and the indicators are perfectly in. accordance with elements presented in part 1 of this multi part document i 6 The interest of these results is to give an. overview of the performance of deployed telephony services and not an overview of the performance of the prototype. on a test platform,5 Platform presentation, The technological watch platform N 1 is installed in a city of less than 250 000 residents whereas the platform N 2 is. installed in a city of less than 25 000 people If we position these 2 measurement points in the area categories defined in. EG 202 765 2 i 1 platform N 1 is a measurement point in category N 2 and platform N 2 is a measurement point in. category N 1,7 ETSI TR 102 716 2 V1 1 1 2010 03,The platform N 1 is characterized by.
Implementation of 7 offers concerning 7 different ISPs. Each offer proposes 3 services Internet access VoIP and IPTV. Access to services is obtained by an Home GateWay HGW. Access to the network can be ADSL or cable type depending on the ISP. Distance between HGW and first digital equipment is about 350 meters Length of the ADSL line. A PSTN access line is available for the speech quality analyses. For VoIP services codec G 711 is implemented on each offer. Signalization protocol is not identical on all the offers depending of ISP H 323 SIP or MGCP are. implemented,The platform N 2 is characterized by, Implementation of 6 offers concerning 6 different ISP. Each offer proposes 2 services Internet access and VoIP. Access to services is obtained by an Home GateWay, For all offers only ADSL technology is deployed to access to the network. Distance between HGW and first digital equipment is about 2 000 meters Length of the ADSL line. A PSTN access line is available for the speech quality analyses. For VoIP services 2 codecs are implemented G 711 and G 726 32 kbps. Signalization protocol is not identical on all the offers depending of ISP H 323 SIP or MGCP are. implemented,Platform N 1 Platform N 2, 7 offers ISP1 IPS2 ISP3 ISP4 ISP6 ISP7 ISP8 6 offers ISP1 ISP3 ISP4 ISP5 ISP7 ISP8. Access technology to network ADSL and cable Access technology to network ADSL. Distance to first digital equipment 350 m Distance to first digital equipment 2 000 m. Codec deployed G 711 Codec deployed G 711 and G 726 32 kbps. To note that between the 2 platforms there is 5 common ISP ISP1 ISP3 ISP4 ISP7 and ISP8. 6 Presentation of test conditions, The indicators and the implemented method are identical for the two platforms. Concerning the tests there is no difference between the offers and between the platforms That allows the comparison. of performances between the offers of the same platform and globally comparison of performances between the two. 6 1 Indicator description,The determined indicators are the following ones.
8 ETSI TR 102 716 2 V1 1 1 2010 03,6 1 1 Post Dialling Delay. Definition Post Dialling Delay is the time interval between the end of dialling by the caller and the. reception back by him of the appropriate ringing tone or recorded announcement This. indicator characterizes only the caller part of the call configuration. Assessment method Several measurements are performed sequentially and the mean value of measurement. results represents the determined value of the indicator. Unit Millisecond,6 1 2 Listening speech quality, Definition Represents the intrinsic quality of speech signal after transmission This indicator takes into. account the degradations generated on the signal by the transmission links. Assessment method Voice quality is evaluated by using the ITU T Recommendation P 862 i 2 with the mapping. functions according to ITU T Recommendation P 862 1 i 3. Several MOS scores are determined in series during the same call So listening speech. quality performance during the call is defined by the mean value of MOS LQON. measurements in the same transmission way, The voice quality indicator is determined in the two transmission directions by alternating the. transmission way at each MOS score determination, For each transmission direction 10 analyses are performed As the duration of the voice. sample for speech analysis is about 20 seconds and a MOS score is determined every. 30 seconds the duration of a test call is about 10 minutes. Unit Note between 1 very bad and 5 excellent determines on MOS LQON scale. 6 1 3 Listening speech quality stability, Definition This metric represents the stability of the voice quality during a communication of several.
minutes long This indicator takes into account the signal degradation due to the. transmission links, Assessment method The MOS scores determined for speech quality evaluation are used to calculate the indicator. Speech and multimedia Transmission Quality STQ Guidelines objectives and results of speech quality analysis in the context of interworking Plugtests for multiplay services Part 2 Results ETSI 2 ETSI TR 102 716 2 V1 1 1 2010 03 Reference DTR STQ 00132 2 Keywords analysis interoperability quality voice ETSI 650 Route des Lucioles F 06921 Sophia Antipolis Cedex FRANCE Tel 33 4 92

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