1、 ETSI ES 202 737 V1.4.1 (2015-03) 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 V1.4.1 (2015-03) 2 Reference RES/STQ-202 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
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6、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 version shall no
7、t be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2015. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the
8、 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 V1.4.1 (2015-03) 3 Contents Intellectual Property
9、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 . 9g34 General considerations . 9g34.1 Default Coding Algorithm 9g34.2 E
10、nd-to-end considerations 10g34.3 Parameters to be investigated . 10g34.3.1 Basic parameters . 10g34.3.2 Further Parameters with respect to Speech Processing Devices . 10g35 Test equipment . 11g35.1 IP half channel measurement adaptor . 11g35.2 Environmental conditions for tests . 11g35.3 Accuracy of
11、 measurements and test signal generation . 11g35.4 Network impairment simulation . 11g35.5 Influence of terminal delay on measurements 12g36 Acoustic environment. 12g37 Requirements and associated Measurement Methodologies 13g37.1 Test setup 13g37.1.1 Setup for handsets and headsets 14g37.1.2 Positi
12、on and calibration of HATS . 14g37.1.3 Test Signal Levels . 14g37.1.4 Setup of background noise simulation 14g37.2 Coding independent parameters . 15g37.2.1 Send Frequency response 15g37.2.2 Send Loudness Rating 16g37.2.3 Void 17g37.2.4 Linearity Range for SLR . 17g37.2.5 Send Distortion . 18g37.2.6
13、 Out-of-Band Signals in Send direction . 18g37.2.7 Send Noise 19g37.2.8 Sidetone Masking Rating STMR (Mouth to ear) 19g37.2.9 Sidetone delay . 20g37.2.10 Terminal Coupling Loss weighted (TCLw) 20g37.2.11 Stability Loss 21g37.2.12 Receive Frequency Response . 22g37.2.13 Receive Loudness Rating 24g37.
14、2.14 Receive Distortion 25g37.2.15 Out-of-band signals in receive direction . 26g37.2.16 Minimum activation level and sensitivity in Receive direction 26g37.2.17 Receive Noise . 26g37.2.18 Automatic Level Control in Receive 26g37.2.19 Double Talk Performance . 27g37.2.19.1 Attenuation Range in Send
15、Direction during Double Talk AH,S,dt. 27g37.2.19.2 Attenuation Range in Receive Direction during Double Talk AH,R,dt28g3ETSI ETSI ES 202 737 V1.4.1 (2015-03) 4 7.2.19.3 Detection of Echo Components during Double Talk 29g37.2.19.4 Minimum activation level and sensitivity of double talk detection . 30
16、g37.2.20 Switching characteristics 30g37.2.20.1 Activation in Send Direction . 30g37.2.20.2 Silence Suppression and Comfort Noise Generation 31g37.2.21 Background Noise Performance . 31g37.2.21.1 Performance in send direction in the presence of background noise . 31g37.2.21.2 Speech Quality in the P
17、resence of Background Noise 32g37.2.21.3 Quality of Background Noise Transmission (with Far End Speech) 33g37.2.22 Quality of echo cancellation . 33g37.2.22.1 Temporal echo effects . 33g37.2.22.2 Spectral Echo Attenuation . 34g37.2.22.3 Occurrence of Artefacts 34g37.2.23 Variant Impairments; Network
18、 dependant 34g37.2.23.1 Send and receive delay - Round trip delay 34g37.2.23.2 Quality of Jitter buffer adjustment 36g37.3 Codec Specific Requirements. 36g37.3.1 Send Delay 36g37.3.2 Receive delay 38g37.3.3 Objective Listening Speech Quality MOS-LQO in Send direction 39g37.3.4 Objective Listening Qu
19、ality MOS-LQO in Receive direction 39g37.3.4.1 Efficiency of Packet Loss Concealment (PLC) . 41g37.3.4.2 Efficiency of Delay Variation Removal 41g37.3.4.3 Quality of Jitter buffer adjustment 41g3Annex A (informative): Processing delays in VoIP terminals 43g3Annex B (informative): Bibliography . 46g3
20、Annex C (informative): Example IP Delay variation 47g3History 48g3ETSI ETSI ES 202 737 V1.4.1 (2015-03) 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 public
21、ly 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 W
22、eb server (http:/ipr.etsi.org). 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
23、become, essential to the present document. Foreword This ETSI Standard (ES) has been produced by ETSI 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 n
24、ot“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (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 te
25、lephones were interfacing switched-circuit 64 kbit/s PCM networks. With the fast growth of IP networks, 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 othe
26、r devices connected to the IP based networks and providing telephony service. Since the IP networks will be in many cases interworking with the traditional PSTN and private networks, many of the basic transmission requirements have to be harmonized with specifications for traditional digital termina
27、ls. However, due to the unique characteristics of the IP networks including packet loss, delay, etc. new performance specification, 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 sp
28、ecific issues. Also, the VoIP terminals may use other than 64 kbit/s PCM (Recommendation ITU-T G.711 8) 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
29、test conditions and meaningful results. The present document provides speech transmission performance 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 V1.4.1 (2015-03) 6
30、 1 Scope The present document provides speech transmission performance requirements for 4 kHz narrowband 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
31、it is the intention of the present document to specify terminal equipment requirements which enable 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 test
32、ing procedures taking into account further quality parameters as perceived by the user. It is the intention 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 ref
33、erences References are either specific (identified by date of publication 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 reference document (including any amendments) applies. R
34、eferenced 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. The following referenc
35、ed documents are necessary for the application of the present document. 1 ETSI I-ETS 300 245-2: “Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 2: PCM A-law handset telephony“. 2 ETSI EN 300 726: “Digital cellular telecommunications system (Phase 2
36、+) (GSM); Enhanced Full Rate (EFR) speech transcoding (GSM 06.60)“. 3 ETSI TS 126 171: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); AMR speech codec, wideband; General description (3GPP TS 26.171 version 6.0.0 Release 6)“. 4 Recommendatio
37、n ITU-T G.107: “The E-model: a computational model for use in transmission planning“. 5 Recommendation ITU-T G.108: “Application of the E-model: A planning guide“. 6 Recommendation ITU-T G.109: “Definition of categories of speech transmission quality“. 7 Recommendation ITU-T G.122: “Influence of nat
38、ional systems on stability and talker echo in international connections“. 8 Recommendation ITU-T G.711: “Pulse code modulation (PCM) of voice frequencies“. 9 Recommendation ITU-T G.723.1: “Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s“. 10 Recommendation ITU
39、-T G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)“. 11 Recommendation ITU-T G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP)“. ETSI ETSI ES 202 737 V1.4.1 (2015-03) 7 12 Recommendation ITU-T G.729.1:
40、 “G.729-based embedded variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. 13 Recommendation ITU-T G.1020: “Performance parameter definitions for quality of speech and other voiceband applications utilizing IP networks“. 14 Recommendation ITU-T P.50:
41、“Artificial voices“. 15 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 16 Recommendation ITU-T P.57: “Artificial ears“. 17 Recommendation ITU-T P.58: “Head and torso simulator for telephonometry“. 18 Recommendation ITU-T P.64: “Determination of sensitivity/frequency chara
42、cteristics of local telephone systems“. 19 Recommendation ITU-T P.79: “Calculation of loudness ratings for telephone sets“. 20 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 21 Recommendation ITU-T P.380: “Electro-acoustic measuremen
43、ts on headsets“. 22 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. NOTE: At the publication date of the present document, annex C to P.501 is available as P.501, Amendment 2. 23 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex
44、test signals“. 24 Recommendation ITU-T P.581: “Use of head and torso simulator for hands-free and handset terminal testing“. 25 Recommendation ITU-T P.862: “Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks
45、and speech codecs“. 26 IEC 61260: “Electroacoustics - Octave-band and fractional-octave-band filters“. 27 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) terminology“. 28 ETSI ES 202 739: “Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband VoIP terminals
46、 (handset and headset) from a QoS perspective as perceived by the user“. 29 ETSI ES 202 396-1: “Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database“. 30 Recommend
47、ation ITU-T P.863: “Perceptual objective listening quality assessment“. 31 Recommendation ITU-T P.863.1: “Application guide for Recommendation ITU-T P.863“. 32 ETSI ES 202 718: “Speech and multimedia Transmission Quality (STQ); Transmission Requirements for IP-based Narrowband and Wideband Home Gate
48、ways and Other Media Gateways from a QoS Perspective as Perceived by the User“. 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-spec
49、ific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. ETSI ETSI ES 202 737 V1.4.1 (2015-03) 8 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 TR 102 648-1: “Speech Processing, Transmission and Quality Aspects
