1、 ETSI ES 202 737 V1.5.1 (2017-01) Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband VoIP terminals (handset and headset) from a QoS perspective as perceived by the user ETSI STANDARD ETSI ETSI ES 202 737 V1.5.1 (2017-01) 2 Reference RES/STQ-242 Keywords narro
2、wband, quality, speech, telephony, terminal, VoIP ETSI 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 enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important noti
3、ce The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authoriza
4、tion of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be a
5、ware 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 https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following
6、services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF versio
7、n shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI register
8、ed for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI 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. ETSI ETSI ES 202 737 V1.5.1 (2017-01) 3 Contents Intellectual
9、 Property Rights 5g3Foreword . 5g3Modal verbs terminology 5g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbreviations . 8g34 General considerations . 9g34.1 Default coding algorith
10、m 9g34.2 End-to-end considerations 10g35 Test equipment . 10g35.1 IP half channel measurement adaptor . 10g35.2 Environmental conditions for tests . 10g35.3 Accuracy of measurements and test signal generation . 11g35.4 Network impairment simulation . 11g35.5 Acoustic environment . 12g35.6 Influence
11、of terminal delay on measurements 12g36 Requirements and associated measurement methodologies . 13g36.1 Notes 13g36.2 Test setup 13g36.2.1 General 13g36.2.2 Setup for handsets and headsets 14g36.2.3 Position and calibration of HATS . 14g36.2.4 Test signal levels . 15g36.2.5 Setup of background noise
12、 simulation 15g36.3 Coding independent parameters . 15g36.3.1 Send frequency response 15g36.3.2 Send Loudness Rating (SLR) 16g36.3.3 Mic mute . 17g36.3.4 Linearity range for SLR 17g36.3.5 Send distortion 18g36.3.6 Out-of-band signals in send direction . 19g36.3.7 Send noise . 19g36.3.8 Sidetone Mask
13、ing Rating STMR (mouth to ear) 20g36.3.9 Sidetone delay . 20g36.3.10 Terminal Coupling Loss weighted (TCLw) 21g36.3.11 Stability loss 21g36.3.12 Receive frequency response 22g36.3.13 Receive Loudness Rating (RLR) 25g36.3.14 Receive distortion . 25g36.3.15 Out-of-band signals in receive direction . 2
14、6g36.3.16 Minimum activation level and sensitivity in receive direction . 27g36.3.17 Receive noise 27g36.3.18 Automatic level control in receive 27g36.3.19 Double talk performance 27g36.3.19.1 General 27g36.3.19.2 Attenuation range in send direction during double talk AH,S,dt28g36.3.19.3 Attenuation
15、 range in receive direction during double talk AH,R,dt. 29g3ETSI ETSI ES 202 737 V1.5.1 (2017-01) 4 6.3.19.4 Detection of echo components during double talk 29g36.3.19.5 Minimum activation level and sensitivity of double talk detection . 31g36.3.20 Switching characteristics 31g36.3.20.1 Note . 31g36
16、.3.20.2 Activation in send direction 31g36.3.20.3 Silence suppression and comfort noise generation 31g36.3.21 Background noise performance 32g36.3.21.1 Performance in send direction in the presence of background noise . 32g36.3.21.2 Speech quality in the presence of background noise . 32g36.3.21.3 Q
17、uality of background noise transmission (with far end speech) 33g36.3.22 Quality of echo cancellation . 34g36.3.22.1 Temporal echo effects . 34g36.3.22.2 Spectral echo attenuation 34g36.3.22.3 Occurrence of artefacts . 35g36.3.22.4 Variable echo path. 35g36.3.23 Variant impairments; network dependan
18、t . 36g36.3.23.1 Clock accuracy send 36g36.3.23.2 Clock accuracy receive . 37g36.3.23.3 Send delay variation 37g36.3.24 Send and receive delay - round trip delay . 38g36.4 Codec specific requirements. 39g36.4.1 Objective listening speech quality MOS-LQO in send direction 39g36.4.2 Objective listenin
19、g quality MOS-LQO in receive direction . 40g36.4.3 Quality of jitter buffer adjustment 42g3Annex A (informative): Processing delays in VoIP terminals 44g3Annex B (informative): Example IP delay variation . 47g3Annex C (informative): Bibliography . 48g3History 49g3ETSI ETSI ES 202 737 V1.5.1 (2017-01
20、) 5 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 Prop
21、erty 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 (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR sea
22、rches, 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. Foreword This ETSI Standard (ES) has been produced by ETS
23、I Technical Committee Speech and multimedia Transmission Quality (STQ). Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules
24、(Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction Traditionally, the analogue and digital telephones were interfacing switched-circuit 64 kbit/s PCM networks. With the fast growth of IP networ
25、ks, terminals directly interfacing packet-switched networks (VoIP) are being rapidly introduced. Such IP network edge devices may include gateways, specifically designed IP phones, soft phones or other devices connected to the IP based networks and providing telephony service. Since the IP networks
26、will be in many cases interworking with the traditional PSTN and private networks, many of the basic transmission requirements have to be harmonised with specifications for traditional digital terminals. However, due to the unique characteristics of the IP networks including packet loss, delay, etc.
27、 new performance specifications, as well as appropriate measuring methods, will have to be developed. Terminals are getting increasingly complex, advanced signal processing is used to address the IP specific issues. Also, the VoIP terminals may use other than 64 kbit/s PCM (Recommendation ITU-T G.71
28、1 7) speech algorithms. The advanced signal processing of terminals is targeted to speech signals. Therefore, wherever possible speech signals are used for testing in order to achieve mostly realistic test conditions and meaningful results. The present document provides speech transmission performan
29、ce for narrowband VoIP handset and headset terminals. NOTE: Requirement limits are given in tables, the associated curve when provided is given for illustration. ETSI ETSI ES 202 737 V1.5.1 (2017-01) 6 1 Scope The present document provides speech transmission performance requirements for 4 kHz narro
30、wband VoIP handset and headset terminals; it addresses all types of IP based terminals, including wireless and soft phones. In contrast to other standards which define minimum performance requirements it is the intention of the present document to specify terminal equipment requirements which enable
31、 manufacturers and service providers to enable good quality end-to-end speech performance as perceived by the user. In addition to basic testing procedures, the present document describes advanced testing procedures taking into account further quality parameters as perceived by the user. It is the i
32、ntention of the present document to describe terminal performance parameters in such way that the remaining variation of parameters can be assessed purely by the E-model. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or
33、version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be
34、 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. The following referenced documents are necessary for the application of the present document. 1 ETSI EN 300 726: “Digita
35、l cellular telecommunications system (Phase 2+) (GSM); Enhanced Full Rate (EFR) speech transcoding (GSM 06.60)“. 2 ETSI TS 126 171: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Speech codec speech processing functions; Adaptive Multi
36、-Rate - Wideband (AMR-WB) speech codec; General description (3GPP TS 26.171)“. 3 Recommendation ITU-T G.107: “The E-model: a computational model for use in transmission planning“. 4 Recommendation ITU-T G.108: “Application of the E-model: A planning guide“. 5 Recommendation ITU-T G.109: “Definition
37、of categories of speech transmission quality“. 6 Recommendation ITU-T G.122: “Influence of national systems on stability and talker echo in international connections“. 7 Recommendation ITU-T G.711: “Pulse code modulation (PCM) of voice frequencies“. 8 Recommendation ITU-T G.723.1: “Dual rate speech
38、coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s“. 9 Recommendation ITU-T G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)“. 10 Recommendation ITU-T G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear pre
39、diction (CS-ACELP)“. 11 Recommendation ITU-T G.729.1: “G.729-based embedded variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. ETSI ETSI ES 202 737 V1.5.1 (2017-01) 7 12 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 13 Re
40、commendation ITU-T P.57: “Artificial ears“. 14 Recommendation ITU-T P.58: “Head and torso simulator for telephonometry“. 15 Recommendation ITU-T P.64: “Determination of sensitivity/frequency characteristics of local telephone systems“. 16 Recommendation ITU-T P.79: “Calculation of loudness ratings f
41、or telephone sets“. 17 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 18 Recommendation ITU-T P.380: “Electro-acoustic measurements on headsets“. 19 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. 20 Recommendat
42、ion ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 21 Recommendation ITU-T P.581: “Use of head and torso simulator for hands-free and handset terminal testing“. 22 IEC 61260-1: “Electroacoustics - Octave-band and fractional-octave-band filters - Pa
43、rt 1: Specifications“. 23 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) terminology“. 24 ETSI ES 202 739: “Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband VoIP terminals (handset and headset) from a QoS perspective as perceived by the user“. 25 ETSI
44、 TS 103 224: “Speech and multimedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database“. 26 Recommendation ITU-T P.863: “Perceptual objective listening quality assessment“. 27 Recommendation ITU-T P.863.1: “Application guide for R
45、ecommendation ITU-T P.863“. 28 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 29 IETF RFC 3550: “RTP: A Transport Protocol for Real-Time Applications“. 2.2 Informative references References are either specific (identified by date of publicat
46、ion and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the t
47、ime of publication ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI EG 201 377-1: “Speech and multimedia Transmission Quality (S
48、TQ); Specification and measurement of speech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-way speech quality across networks“. i.2 ETSI EG 202 425: “Speech Processing, Transmission and Quality Aspects (STQ); Definition and implementation of VoIP refe
49、rence point“. ETSI ETSI ES 202 737 V1.5.1 (2017-01) 8 i.3 ETSI EG 202 396-3: “Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission - Objective test methods“. i.4 NIST Net. NOTE: Available at https:/www-x.antd.nist.gov/itg/nistnet/. i.5 Netem. NOTE: Available at http:/www.linuxfoundation.org/en/Net:Netem. i.6 Trace Control for Netem (TCN): “A. Keller, Trace Control for Netem, Semester Thesis SA-2006-15, ETH
