1、 ETSI TS 103 737 V1.2.1 (2017-07) Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband wireless terminals (handset and headset) from a QoS perspective as perceived by the user TECHNICAL SPECIFICATION ETSI ETSI TS 103 737 V1.2.1 (2017-07)2 Reference RTS/STQ-231-1
2、 Keywords 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
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7、 without 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
8、 ETSI 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 103 737 V1.2.1 (2017-07)3 Contents Intellectual Property Rig
9、hts 5g3Foreword . 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 ne
10、tworks . 9g34.2 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 Setup for handsets and headsets 11g35.2.2 Setup of variable echo path . 11g35.3 Acoustical
11、 environment 11g35.4 Test signals . 12g35.5 Calibration 12g35.6 Environmental conditions for tests . 14g35.7 Accuracy of test equipment 14g35.8 Power feeding conditions . 14g35.9 Influence of terminal delay on measurements 14g36 Codec independent requirements and associated Measurement Methodologies
12、 15g36.1 Send and receive frequency response . 15g36.1.1 Send frequency response 15g36.1.2 Receive frequency 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.
13、3 Sidetone parameters . 20g36.3.0 Introduction. 20g36.3.1 Sidetone Masking Rating (STMR) . 20g36.3.2 Sidetone delay . 21g36.4 Send and receive noise . 22g36.4.1 Send noise. 22g36.4.2 Receive noise 22g36.5 Send and receive distortion 23g36.5.0 Introduction. 23g36.5.1 Send Distortion . 23g36.5.2 Recei
14、ve distortion . 24g36.6 Stability loss and TCLw . 24g36.6.1 Stability loss 24g36.6.2 Terminal Coupling Loss weighted (TCLw) 25g36.7 Double talk performance 26g3ETSI ETSI TS 103 737 V1.2.1 (2017-07)4 6.7.0 Introduction. 26g36.7.1 Attenuation Range in Send Direction during Double Talk AH,S,dt. 26g36.7
15、.2 Attenuation Range in Receive Direction during Double Talk AH,R,dt. 27g36.7.3 Detection of echo components during double Talk 28g36.7.4 Minimum activation level and sensitivity of double talk detection 29g36.8 Switching parameters . 29g36.8.1 Activation in Send Direction 29g36.8.2 Minimum activati
16、on level and sensitivity in Receive direction 30g36.8.3 Automatic level control 30g36.8.4 Silence Suppression and Comfort Noise Generation 30g36.9 Background noise performance 30g36.9.1 Performance in send direction in the presence of background noise 30g36.9.2 Speech Quality in the Presence of Back
17、ground Noise 31g36.9.3 Quality of Background Noise Transmission (with Far End Speech) 32g36.10 Quality of echo cancellation . 33g36.10.1 Temporal echo effects . 33g36.10.2 Spectral Echo Attenuation 33g36.10.3 Occurrence of Artifacts . 34g36.11 Send and receive delay - round trip delay 34g36.12 Objec
18、tive listening Quality in send and receive direction 36g36.13 Variable echo path 36g37 Codec dependent requirements and associated Measurement Methodologies . 36g37.1 Speech Coders 36g37.2 Objective listening speech quality 37g37.2.1 Objective listening speech quality MOS-LQO in send direction 37g37
19、.2.2 Objective listening quality MOS-LQO in receive direction . 37g38 Requirements and associated Measurement Methodologies (with an additional radio link between the terminal and external electroacoustical devices) 38g3Annex A (informative): Bibliography . 39g3History 40g3ETSI ETSI TS 103 737 V1.2.
20、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 and non-members, and can be found in ETSI SR
21、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/). Pursuant to the ETSI IPR Policy, no inves
22、tigation, 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 present document. Trademarks The present documen
23、t 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/or tradename. Mention of those trademarks in
24、 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 Transmission Quality (STQ). Modal verbs terminology
25、 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). “must“ and “must not“ are NOT allowed in ETSI
26、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 terminals is targeted to speech signals. Therefore
27、, wherever possible speech signals are used for testing in order to achieve mostly realistic test conditions and meaningful results. ETSI ETSI TS 103 737 V1.2.1 (2017-07)6 1 Scope The present document provides speech transmission performance requirements for wireless terminals; it addresses all type
28、s of wireless terminals, including softphones. This part addresses handset and headset functions 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 terminal equipment requirements whic
29、h 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 terminal and external electroacous
30、tical 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 document describes advanced testing pr
31、ocedures 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 talking quality, conversational perfor
32、mance, 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). Terminals which are not intended to
33、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, only the cited version applies. Fo
34、r 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 hyperlinks included in this cla
35、use 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 Recommendation ITU-T P.50: “Artificial voices“. 2 Recommendation ITU-T P.56: “Objective measurement of active spe
36、ech level“. 3 Recommendation ITU-T P.57: “Artificial ears“. 4 Recommendation ITU-T P.58: “Head and torso simulator for telephonometry“. 5 Recommendation ITU-T P.64: “Determination of sensitivity/frequency characteristics of local telephone systems“. 6 Recommendation ITU-T P.79: “Calculation of loudn
37、ess ratings for telephone sets“. 7 Recommendation ITU-T P.310: “Transmission characteristics for telephone band (300-3400 Hz) digital telephones“. ETSI ETSI TS 103 737 V1.2.1 (2017-07)7 8 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“
38、. 9 Recommendation ITU-T P.380: “Electro-acoustic measurements on headsets“. 10 Recommendation ITU-T P.501 (2012): “Test signals for use in telephonometry“. 11 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 12 Recommendation ITU-T P.
39、581: “Use of head and torso simulator (HATS) for hands-free terminal testing“. 13 Recommendation ITU-T G.122: “Influence of national systems on stability and talker echo in international connections“. 14 IEC 61260-1: “Electroacoustics - Octave-band and fractional-octave-band filters. - Part 1: Speci
40、fication“. 15 IEC 61672-1: “Electroacoustics - Sound level meters - Part 1: Specifications“. 16 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)“. 17 Recommenda
41、tion 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“. 18 Recommendation ITU-T G.711: “Pulse code modulation (PCM) of voice frequencies“. 19 Recommendation ITU-T G.726: “40, 32, 24, 16 kbit/s Adaptive Differentia
42、l Pulse Code Modulation (ADPCM)“. 20 Recommendation ITU-T G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP)“. 21 ETSI TS 146 060: “Digital cellular telecommunications system (Phase 2+); (GSM); Enhanced Full Rate (EFR) speech transcodin
43、g (3GPP TS 46.060)“. 22 ETSI TS 146 010: “Digital cellular telecommunications system (Phase 2+); (GSM); Full rate speech; Transcoding (3GPP TS 46.010)“. 23 Recommendation ITU-T P.863: “Perceptual objective listening quality assessment“. 24 Recommendation ITU-T P.863.1: “Application Guide for Recomme
44、ndation ITU-T P.863“. 25 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“. 26 ETSI TS 103 224: “Speech and multimedia Transmission Quality (ST
45、Q); A sound field reproduction method for terminal testing including a background noise database“. 27 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 28 ETSI TS 126 441: “Universal Mobile Telecommunications System (UMTS); LTE; EVS Codec Gener
46、al Overview (3GPP TS 26.441)“. ETSI ETSI TS 103 737 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 non-specific. For specific references, only the cited version applies. For non-specific refer
47、ences, 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 long term validity. The following referenced documents are not necessary for the application
48、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 (STQ); Specification and measurement of speech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-
49、way speech quality across networks“. 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 overall acoustic impedance similar to that of the median adult human ear over a given frequency band codec: combination of an analogue-to-digital encoder and a digital-to-analogue
