1、 ETSI TS 103 739 V1.2.1 (2017-07) Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband wireless terminals (handset and headset) from a QoS perspective as perceived by the user TECHNICAL SPECIFICATION ETSI ETSI TS 103 739 V1.2.1 (2017-07)2 Reference RTS/STQ-231-3 K
2、eywords 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 c
3、an 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 authorization of ETSI. In case of
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6、tsi.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 not be modified w
7、ithout the 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 E
8、TSI registered 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 103 739 V1.2.1 (2017-07)3 Contents Intellectual Property Right
9、s 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 Configurations and interfaces . 9g34.1 Introduction 9g34.2 Access netw
10、orks . 9g34.3 Additional (radio) links between the terminal and external electroacoustical devices . 9g35 Test Configurations 9g35.1 Set-up interface 9g35.2 Set-up for terminals 10g35.3 Acoustical environment 11g35.4 Test signals . 11g35.5 Calibration 11g35.6 Environmental conditions for tests . 13g
11、35.7 Accuracy of test equipment 13g35.8 Power feeding conditions . 14g35.9 Influence of terminal delay on measurements 14g36 Codec independent requirements and associated Measurement Methodologies 14g36.1 Send and receive frequency response . 14g36.1.1 Send frequency response 14g36.1.2 Receive frequ
12、ency response 16g36.2 Send and receive loudness ratings 19g36.2.1 Send Loudness Rating (SLR) 19g36.2.2 Microphone (mic) mute 19g36.2.3 Receive Loudness Rating (RLR) 19g36.2.4 LR stability . 20g36.3 Sidetone parameters . 20g36.3.1 Introduction. 20g36.3.2 SideTone Masking Rating (STMR) 20g36.3.3 Sidet
13、one delay . 21g36.4 Send and receive noise . 22g36.4.1 Send noise . 22g36.4.2 Receive noise 22g36.5 Send and receive distortion 23g36.5.1 Introduction. 23g36.5.2 Send Distortion . 23g36.5.3 Receive distortion . 23g36.6 Stability loss . 24g36.7 Terminal Coupling Loss . 25g36.8 Double talk performance
14、 26g36.8.1 Introduction. 26g36.8.2 Attenuation Range in Send Direction during Double Talk AH,S,dt27g36.8.3 Attenuation Range in Receive Direction during Double Talk AH,S,dt. 28g36.8.4 Detection of echo components during double Talk 28g3ETSI ETSI TS 103 739 V1.2.1 (2017-07)4 6.8.5 Minimum activation
15、level and sensitivity of double talk detection 30g36.9 Switching parameters . 31g36.9.1 Activation in Send Direction 31g36.9.2 Minimum activation level and sensitivity in Receive direction 31g36.9.3 Automatic level control 31g36.9.4 Silence Suppression and Comfort Noise Generation 31g36.9.5 Non Line
16、ar Processing 32g36.10 Background noise performance 32g36.10.1 Performance in send direction in the presence of background noise 32g36.10.2 Speech Quality in the Presence of Background Noise 33g36.10.3 Quality of Background Noise Transmission (with Far End Speech) 33g36.11 Quality of echo cancellati
17、on . 34g36.11.1 Temporal echo effects . 34g36.11.2 Spectral Echo Attenuation 35g36.11.3 Occurrence of Artefacts 35g36.11.4 Variable echo path 35g36.12 Send and receive delay or round trip delay 36g36.13 Objective listening Quality in send and receive direction 38g37 Codec dependent requirements and
18、associated Measurement Methodologies . 38g37.1 Speech Coders 38g37.2 Objective listening Quality in send and receive direction 39g37.2.1 Objective listening speech quality MOS-LQO in send direction 39g37.2.2 Objective listening quality MOS-LQO in receive direction . 39g38 Requirements and associated
19、 Measurement Methodologies (with an additional radio link between the terminal and external electroacoustical devices) 40g3Annex A (informative): Bibliography . 41g3History 42g3ETSI ETSI TS 103 739 V1.2.1 (2017-07)5 Intellectual Property Rights Essential patents IPRs essential or potentially essenti
20、al 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
21、 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 searches, has been carried out by ETSI. No guarantee can be given as to t
22、he 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. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
23、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/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organiz
24、ations associated with those trademarks. Foreword This Technical 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“,
25、 “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). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction The present document covers wirele
26、ss speech terminals. It aims to enhance the interoperability 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 achieve realistic test condit
27、ions and meaningful results. ETSI ETSI TS 103 739 V1.2.1 (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 handset and headset functi
28、ons of wideband wireless terminals. Differently from other standards 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 perform
29、ance 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 terminal and external electroacoustical devices is used (e.g. Bluetooth link), the present document will address the overall qua
30、lity. In the present document objective measurement methodologies and 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
31、 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 talking quality, conversational performance, as well as the use in noisy environments. Related requirements and test method
32、s will be defined in the present document. For all the functions, the 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 documen
33、t. 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, only the cited version applies. For non-specific references, the latest version of the referenced document (in
34、cluding 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 hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long
35、term validity. The following referenced documents are necessary for the application of the present document. 1 Void. 2 Void. 3 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 4 Recommendation ITU-T P.57: “Artificial ears“. 5 Recommendation ITU-T P.58: “Head and torso simul
36、ator for telephonometry“. 6 Recommendation ITU-T P.64: “Determination of sensitivity/frequency characteristics of local telephone systems“. 7 Recommendation ITU-T P.79: “Calculation of loudness ratings for telephone sets“. ETSI ETSI TS 103 739 V1.2.1 (2017-07)7 8 Recommendation ITU-T P.340: “Transmi
37、ssion characteristics and speech quality parameters of hands-free terminals“. 9 Recommendation ITU-T P.380: “Electro-acoustic measurements on headsets“. 10 Recommendation ITU-T P.501 Amendment 1 (2012): “Test signals for use in telephonometry“. 11 Recommendation ITU-T P.502: “Objective test methods
38、for speech communication systems using complex test signals“. 12 Recommendation ITU-T P.581: “Use of head and torso simulator for hands-free terminal testing“. 13 IEC 61672: “Electroacoustics - Sound Level Meters“. 14 IEC 61260: “Electroacoustics - Octave-band and fractional-octave-band filters“. 15
39、 ETSI 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)“. 16 Recommendation ITU-T G.729.1: “G.729 based embedded variable bit-rate co
40、der: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. 17 Recommendation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. 18 Recommendation ITU-T G.711.1: “Wideband embedded extension for ITU-T G.711 pulse code modulation“. 19 Recommendation ITU-T G.722.2: “Wideband codi
41、ng of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. 20 ETSI TS 103 106: “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 Recomme
42、ndation ITU-T P.311: “Transmission characteristics for wideband digital handset and headset telephones“. 22 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)“. 23 ETSI TS 103 224: “Speech and mult
43、imedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database“. 24 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 25 Recommendation ITU-T P.863: “Perceptual objective listenin
44、g quality assessment“. 26 Recommendation ITU-T P.863.1: “Application guide for Recommendation ITU-T P.863“. 27 Recommendation ITU-T G.122: “Influence of national systems on stability and talker echo in international connections“. 2.2 Informative references References are either specific (identified
45、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. NOTE: While any hyperlinks included in this clause
46、were valid at the time of publication, ETSI cannot guarantee their long term validity. ETSI ETSI TS 103 739 V1.2.1 (2017-07)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 E
47、G 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“. 3 Definitions and abbreviations 3.1 Definitions For the purposes
48、 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 overall acoustic impedance similar to that of the median
49、adult human ear over a given frequency band codec: combination of an analogue-to-digital encoder and a digital-to-analogue decoder operating in opposite directions of transmission in the same equipment diffuse field equalization: equalization of the HATS sound pick-up, equalization of the difference, in dB, between the spectrum level of the acoustic pressure at the ear Drum Reference Point (DRP) and the spectrum level of the acoustic pressure at the HATS Reference Point (HRP) in a diffuse sound field with the HATS absen
