1、 ETSI TS 103 740 V1.2.1 (2017-07) Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband wireless terminals (handsfree) from a QoS perspective as perceived by the user TECHNICAL SPECIFICATION ETSI ETSI TS 103 740 V1.2.1 (2017-07)2 Reference RTS/STQ-231-4 Keywords sp
2、eech, terminal 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 notice The present document can be down
3、loaded 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 authorization of ETSI. In case of any existi
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6、ople/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 not be modified without the
7、 written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI regist
8、ered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 103 740 V1.2.1 (2017-07)3 Contents Intellectual Property Rights 5g3Forew
9、ord . 5g3Modal verbs terminology 5g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 8g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbreviations . 8g34 Configurations and interfaces . 9g34.0 Introduction 9g34.1 Access networks . 9g3
10、4.2 Additional (radio) links between the terminal and external electroacoustical devices . 10g35 Test Configurations 10g35.1 Set-up interface 10g35.2 Set-up for terminals 10g35.2.0 Introduction. 10g35.2.1 Hand-held terminal . 11g35.2.2 Vehicle mounted hands-free . 11g35.2.3 Desktop hands-free termin
11、al . 11g35.2.4 Additional test setup for handsfree function with softphone 12g35.2.4.0 Introduction . 12g35.2.4.1 Softphone including speakers and microphone . 13g35.2.4.2 Softphone with separate speakers . 14g35.2.5 Test setup for variable echo path 15g35.3 Acoustical environment 15g35.4 Test signa
12、ls . 15g35.5 Calibration and test signal level . 16g35.5.1 Send 16g35.5.2 Receive . 17g35.5.3 Setup of background noise simulation 17g35.6 Environmental conditions for tests . 18g35.7 Accuracy of test equipment 18g35.8 Power feeding conditions . 19g35.9 Influence of terminal delay on measurements 19
13、g36 Codec independent requirements and associated Measurement Methodologies 19g36.1 Send and receive frequency response . 19g36.1.1 Send frequency response 19g36.1.2 Receive frequency response 20g36.1.2.1 Handheld terminal . 20g36.1.2.2 Void. 22g36.1.2.3 Softphone (computer-based terminals) . 22g36.
14、1.2.4 Desktop Terminal 22g36.2 Send and receive loudness ratings 23g36.2.1 Send Loudness Ratings . 23g36.2.2 Microphone (Mic) mute 23g36.2.3 Receive Loudness Ratings 24g36.3 Send and receive noise . 25g36.3.1 Send Noise 25g36.3.2 Receive Noise . 25g3ETSI ETSI TS 103 740 V1.2.1 (2017-07)4 6.4 Send an
15、d receive distortion 26g36.4.0 General 26g36.4.1 Send distortion 26g36.4.2 Receive distortion . 27g36.5 Terminal Coupling Loss . 27g36.6 Stability Loss (or similar parameters) 28g36.7 Double talk performance 29g36.7.0 Introduction. 29g36.7.1 Attenuation Range in Send Direction during Double Talk . 2
16、9g36.7.2 Attenuation Range in Receive Direction during Double Talk 31g36.7.3 Detection of echo components during double Talk 31g36.7.4 Minimum activation level and sensitivity of double talk detection 33g36.8 Switching parameters . 33g36.8.0 Clarification 33g36.8.1 Activation in Send Direction 33g36
17、.8.2 Minimum activation level and sensitivity in Receive direction 34g36.8.3 Automatic level control 34g36.8.4 Silence Suppression and Comfort Noise Generation 34g36.9 Background noise performance 34g36.9.1 Performance in send direction in the presence of background noise 34g36.9.2 Speech Quality in
18、 the Presence of Background Noise 35g36.9.3 Quality of Background Noise Transmission (with Far End Speech) 36g36.10 Quality of echo cancellation . 36g36.10.1 Temporal echo effects . 36g36.10.2 Spectral Echo Attenuation 37g36.10.3 Occurrence of Artefacts 37g36.10.4 Variable echo path 38g36.11 Send an
19、d receive delay or round trip delay 38g36.12 Objective listening Quality in send and receive direction 40g37 Codec dependent requirements and associated Measurement Methodologies . 40g37.1 Speech Coders 40g37.2 void . 41g37.3 Objective listening Quality in send and receive direction 41g37.3.1 Object
20、ive listening speech quality MOS-LQO in send direction 41g37.3.2 Objective listening quality MOS-LQO in receive direction . 41g37.4 Network conditions for electrical-acoustical measurements (speech samples) 42g38 Requirements and associated Measurement Methodologies (with an additional radio link be
21、tween the terminal and external electroacoustical devices) 42g3Annex A (informative): Bibliography . 43g3History 44g3ETSI ETSI TS 103 740 V1.2.1 (2017-07)5 Intellectual Property Rights Essential patents IPRs essential or potentially essential to the present document may have been declared to ETSI. T
22、he 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 f
23、rom 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 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
24、 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are i
25、ndicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Techn
26、ical Specification (TS) 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 not“, “can“ and “cannot“ are to be interpreted as des
27、cribed 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 The present document covers wireless speech terminals. It aims to enhance the interoperability
28、 and end-to-end quality with all other types of terminals. The advanced signal processing of terminals is targeted to speech signals. Therefore, wherever possible speech signals are used for testing in order to archive mostly realistic test conditions and meaningful results. ETSI ETSI TS 103 740 V1.
29、2.1 (2017-07)6 1 Scope The present document provides speech transmission performance requirements for wireless terminals; it addresses all types of wireless terminals, including softphones. The present document addresses handsfree function of wide band wireless terminals. In contrast to other standa
30、rds which define minimum performance requirements 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 whatever be the radio link (terminal
31、s may implement different radio links with the access network). When an additional radio link between the terminal and external electroacoustical devices is used (e.g. Bluetoothlink), the present document will address the overall quality. In the present document objective measurement methodologies a
32、nd requirements for wireless speech terminals are given. In addition to basic testing procedures, the present document describes advanced testing procedures taking into account further quality parameters as perceived by the user. The requirements available in the present document will ensure a high
33、compatibility across access networks with all types of terminals. It is the aim to optimize the listening and talking quality, conversational performance, as well as the use in noisy environment. Related requirements and test methods will be defined in the present document. For all the functions, th
34、e present document will consider the limitations in audio performance due to different form factors (e.g. size, shape). Terminals which are not intended to be connected to public networks are outside the scope of the present document. 2 References 2.1 Normative references References are either speci
35、fic (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 referenced document (including any amendments) applies. Referenced documents which are not
36、found to be publicly available in the expected location might be found at https:/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
37、the application of the present document. 1 Void. 2 ETSI TS 103 224: “Speech and multimedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database“. 3 Recommendation ITU-T G.122: “Influence of national systems on stability and talker e
38、cho in international connections“. 4 Recommendation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. 5 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“. 6 Recommendation ITU-T G.131: “Talker ech
39、o and its control“. ETSI ETSI TS 103 740 V1.2.1 (2017-07)7 7 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 8 Recommendation ITU-T P.58: “Head and torso simulator for telephonometry“. 9 Recommendation ITU-T P.79 and Corrigendum 2 (2001): “Calculation of loudness ratings f
40、or telephone sets“. 10 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 11 Recommendation ITU-T P.341: “Transmission characteristics for wideband digital loudspeaking and hands-free telephony terminals“. 12 Recommendation ITU-T P.501:
41、“Test signals for use in telephonometry“. 13 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 14 Recommendation ITU-T P.581: “Use of head and torso simulator (HATS) for hands-free and handset terminal testing“. 15 IEC 61260 (all parts)
42、: “Electroacoustics - Octave-band and fractional-octave-band filters“. 16 Recommendation ITU-T G.711.1: “Wideband embedded extension for G.711 pulse code modulation“. 17 Recommendation ITU-T G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. 18 ETSI
43、 TS 126 171 (V6.0.0): “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)“. 19 IEC 61672 (all parts): “Electroacoustics - Sound level meters“. 20 ETSI TS 10
44、3 106: “Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise: Background noise transmission for mobile terminals-objective test methods“. 21 Recommendation ITU-T P.1110: “Wideband hands-free communication in motor vehicles“. 22 ETSI TS 126
45、441 (V12.0.0): “Universal Mobile Telecommunications System (UMTS); LTE; EVS Codec General Overview (3GPP TS 26.441 version 12.0.0 Release 12)“. 23 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 24 Recommendation ITU-T P.863: “Perceptual obje
46、ctive listening quality assessment“. 25 Recommendation ITU-T P.863.1: “Application guide for Recommendation ITU-T P.863“. ETSI ETSI TS 103 740 V1.2.1 (2017-07)8 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or no
47、n-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 time of publication, ETSI cannot guarantee their lo
48、ng 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 Void. i.2 ETSI EG 201 377-1: “Speech and multimedia Transmission Quality (STQ); Specification and measurement of s
49、peech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-way speech quality across networks“. i.3 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) terminology“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: artificial ear: device for the calibration of earphones incorporating an acoustic coupler and a calibrated microphone for the measurement of the sound pressure and having an over
