1、 ETSI TS 103 738 V1.2.1 (2017-07) Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband wireless terminals (handsfree) from a QoS perspective as perceived by the user TECHNICAL SPECIFICATION ETSI ETSI TS 103 738 V1.2.1 (2017-07)2 Reference RTS/STQ-231-2 Keywords
2、speech, 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 do
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6、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 not be modified without t
7、he 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 regi
8、stered 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 103 738 V1.2.1 (2017-07)3 Contents Intellectual Property Rights 5g3For
9、eword . 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 Configurations and interfaces . 9g34.0 Introduction 9g34.1 Access networks . 9
10、g34.2 Additional (radio) links between the terminal and external electroacoustical devices . 9g35 Test Configurations 10g35.1 Set-up interface 10g35.2 Set-up for terminals 10g35.2.0 General 10g35.2.1 Handheld terminal 10g35.2.2 Vehicle mounted hands-free . 11g35.2.3 Desktop hands-free terminal . 11g
11、35.2.4 Additional test setup for hands-free function with softphone . 12g35.2.4.0 General 12g35.2.4.1 Softphone including speakers and microphone . 12g35.2.4.2 Softphone with separate speakers . 13g35.2.5 Test setup for variable echo path 15g35.3 Acoustical environment 15g35.4 Test signals . 15g35.5
12、 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 19g36 Codec in
13、dependent 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) . 22g36.1.2.4 Deskto
14、p Terminal 22g36.2 Send and receive loudness ratings 23g36.2.1 Send Loudness Ratings . 23g36.2.2 Microphone (Mic) mute 24g36.2.3 Receive Loudness Ratings 24g36.3 Send and receive noise . 25g36.3.1 Send Noise 25g36.3.2 Receive Noise . 25g3ETSI ETSI TS 103 738 V1.2.1 (2017-07)4 6.4 Send and receive di
15、stortion 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 28g36.7.0 General 28g36.7.1 Attenuation Range in Send Direction during Double Talk . 29g36.7.2 Attenuati
16、on Range in Receive Direction during Double Talk 30g36.7.3 Detection of echo components during double Talk 31g36.7.4 Minimum activation level and sensitivity of double talk detection 32g36.8 Switching parameters . 32g36.8.0 Introduction. 32g36.8.1 Activation in Send Direction 32g36.8.2 Minimum activ
17、ation level and sensitivity in Receive direction 33g36.8.3 Automatic level control 33g36.8.4 Silence Suppression and Comfort Noise Generation 33g36.9 Background noise performance 33g36.9.1 Performance in send direction in the presence of background noise 33g36.9.2 Speech Quality in the Presence of B
18、ackground Noise 34g36.9.3 Quality of Background Noise Transmission (with Far End Speech) 35g36.10 Quality of echo cancellation . 36g36.10.1 Temporal echo effects . 36g36.10.2 Spectral Echo Attenuation 36g36.10.3 Occurrence of Artefacts 37g36.10.4 Variable echo path 37g36.11 Send and receive delay or
19、 round trip delay 37g36.12 Objective listening Quality in send and receive direction 39g37 Codec dependent requirements and associated Measurement Methodologies . 39g37.1 Speech Coders 39g37.2 Void. . 40g37.3 Objective listening Quality in send and receive direction 40g37.3.1 Objective listening spe
20、ech quality MOS-LQO in send direction 40g37.3.2 Objective listening quality MOS-LQO in receive direction . 41g38 Requirements and associated Measurement Methodologies (with an additional radio link between the terminal and external electroacoustical devices) 41g3Annex A (informative): Bibliography .
21、 42g3History 43g3ETSI ETSI TS 103 738 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. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members an
22、d 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 (https:/ipr.etsi.org/)
23、. 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 prese
24、nt 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 indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/o
25、r 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 Technical Specification (TS) has been produced by ETSI Technical Committee Speech and multimedia Transmis
26、sion 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 (Verbal forms for the expression of provisions). “mu
27、st“ 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 and end-to-end quality with all other types of terminals. The advanced signal processing of termina
28、ls 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. ETSI ETSI TS 103 738 V1.2.1 (2017-07)6 1 Scope The present document provides speech transmission performance requirements fo
29、r wireless terminals; it addresses all types of wireless terminals, including softphones. This part addresses handsfree function of narrow band wireless terminals. In contrast to other standards which define minimum performance requirements it is the intention of the present document to specify term
30、inal 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 (terminals may implement different radio links with the access network). When an additional radio link between the te
31、rminal and external electroacoustical devices is used (e.g. Bluetoothlink), the standard will address the overall quality. In the present document objective measurement methodologies and requirements for wireless speech terminals are given. In addition to basic testing procedures, the present docume
32、nt 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 compatibility across access networks with all types of terminals. It is the aim to optimize the listening and talkin
33、g 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, the standard will consider the limitations in audio performance due to different form factors (e.g. size, shape). Term
34、inals 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 specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, on
35、ly 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 found at https:/docbox.etsi.org/Reference/. NOTE: While any
36、 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 TS 126 171 (V6.0.0): “Digital cellular telecommunications system (Phase 2+);
37、 Universal Mobile Telecommunications System (UMTS); AMR speech codec, wideband; General description (3GPP TS 26.171 version 6.0.0 Release 6)“. 2 Recommendation ITU-T G.122: “Influence of national systems on stability and talker echo in international connections“. 3 Void. 4 Recommendation ITU-T G.711
38、: “Pulse code modulation (PCM) of voice frequencies“. 5 Recommendation ITU-T G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)“. ETSI ETSI TS 103 738 V1.2.1 (2017-07)7 6 Recommendation ITU-T G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code
39、-excited linear prediction (CS-ACELP)“. 7 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“. 8 Void. 9 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 10 Recommendation IT
40、U-T P.58: “Head and torso simulator for telephonometry“. 11 Recommendation ITU-T P.79: “Calculation of loudness ratings for telephone sets“. 12 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 13 Recommendation ITU-T P.342: “Transmissi
41、on characteristics for narrow-band digital loudspeaking and hands-free telephony terminals“. 14 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. 15 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 16 Recommendation
42、 ITU-T P.581: “Use of head and torso simulator (HATS) for hands-free terminal testing“. 17 Recommendation ITU-T O.41: “Psophometer for use on telephone-type circuits“. 18 IEC 61260: “Electroacoustics - Octave-band and fractional-octave-band filters“. 19 ETSI TS 146 010: “Digital cellular telecommuni
43、cations system (Phase 2+); Full-rate speech; Transcoding (3GPP TS 46.010 Release 9)“. 20 ETSI TS 146 060: “Digital cellular telecommunications system (Phase 2+); Enhanced Full Rate (EFR) speech transcoding (3GPP TS 46.060 Release 9)“. 21 ETSI TS 103 106 (03-2013) (V1.2.1): “Speech and multimedia Tra
44、nsmission Quality (STQ); Speech quality performance in the presence of background noise: Background noise transmission for mobile terminals-objective test methods“. 22 Recommendation ITU-T P.863: “Perceptual objective listening quality assessment“. 23 Recommendation ITU-T P.863.1: “Application guide
45、 for Recommendation ITU-T P.863“. 24 ETSI TS 126 441 (V12.0.0): “Universal Mobile Telecommunications System (UMTS); LTE; EVS Codec General Overview (3GPP TS 26.441 version 12.0.0 Release 12)“. 25 ETSI TS 103 224: “Speech and multimedia Transmission Quality (STQ); A sound field reproduction method fo
46、r terminal testing including a background noise database“. 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-specific references, the
47、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 long term validity. The following referenced documents are not necessary for the application of the pres
48、ent document but they assist the user with regard to a particular subject area. i.1 Void. ETSI ETSI TS 103 738 V1.2.1 (2017-07)8 i.2 Recommendation ITU-T P.1100: “Narrowband hands-free communication in motor vehicles“. i.3 IEC 61672 (Edition 1.0): “Electroacoustics - Sound level meters“. i.4 Void. i
49、.5 Void. i.6 ETSI EG 201 377-1: “Speech and multimedia Transmission Quality (STQ); Specification and measurement of speech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-way speech quality across networks“. i.7 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: artificial ear: dev
