1、 ETSI ES 202 739 V1.5.1 (2017-01) Speech and multimedia Transmission Quality (STQ); Transmission requirements for wideband VoIP terminals (handset and headset) from a QoS perspective as perceived by the user ETSI STANDARD ETSI ETSI ES 202 739 V1.5.1 (2017-01) 2 Reference RES/STQ-244 Keywords quality
2、, speech, telephony, terminal, VoIP, wideband 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 T
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7、all not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered f
8、or the 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 202 739 V1.5.1 (2017-01) 3 Contents Intellectual Pro
9、perty 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 . 8g34 General considerations . 9g34.1 Coding algorithm 9g34.2 End
10、-to-end considerations 9g35 Test equipment . 10g35.1 IP half channel measurement adaptor . 10g35.2 Environmental conditions for tests . 10g35.3 Accuracy of measurements and test signal generation . 10g35.4 Network impairment simulation . 11g35.5 Acoustic environment . 12g35.6 Influence of terminal d
11、elay on measurements 12g36 Requirements and associated measurement methodologies . 12g36.1 Notes 12g36.2 Test setup 13g36.2.1 General 13g36.2.2 Setup for handsets and headsets 13g36.2.3 Position and calibration of HATS . 14g36.2.4 Test signal levels . 14g36.2.5 Setup of background noise simulation 1
12、4g36.3 Coding independent parameters . 15g36.3.1 Send frequency response 15g36.3.2 Send Loudness Rating (SLR) 16g36.3.3 Mic mute . 16g36.3.4 Linearity range for SLR 17g36.3.5 Send distortion 17g36.3.6 Out-of-band signals in send direction . 18g36.3.7 Send noise . 19g36.3.8 SideTone Masking Rating ST
13、MR (mouth to ear) . 19g36.3.9 Sidetone delay . 20g36.3.10 Terminal Coupling Loss (TCL) 20g36.3.11 Stability loss 21g36.3.12 Receive frequency response 22g36.3.13 Receive Loudness Rating (RLR) 24g36.3.14 Receive distortion . 25g36.3.15 Out-of-band signals in receive direction . 26g36.3.16 Minimum act
14、ivation level and sensitivity in receive direction . 26g36.3.17 Receive noise 26g36.3.18 Automatic level control in receive 27g36.3.19 Double talk performance 27g36.3.19.1 General 27g36.3.19.2 Attenuation range in send direction during double talk AH,S,dt27g36.3.19.3 Attenuation range in receive dir
15、ection during double talk AH,R,dt28g3ETSI ETSI ES 202 739 V1.5.1 (2017-01) 4 6.3.19.4 Detection of echo components during double talk 29g36.3.19.5 Minimum activation level and sensitivity of double talk detection . 30g36.3.20 Switching characteristics 30g36.3.20.1 Note . 30g36.3.20.2 Activation in s
16、end direction 31g36.3.20.3 Silence suppression and comfort noise generation 31g36.3.21 Background noise performance 31g36.3.21.1 Performance in send in the presence of background noise 31g36.3.21.2 Speech quality in the presence of background noise . 32g36.3.21.3 Quality of background noise transmis
17、sion (with far end speech) 33g36.3.22 Quality of echo cancellation . 34g36.3.22.1 Temporal echo effects . 34g36.3.22.2 Spectral echo attenuation 34g36.3.22.3 Occurrence of artefacts . 35g36.3.22.4 Variable echo path. 35g36.3.23 Variant impairments; network dependant . 36g36.3.23.1 Clock accuracy sen
18、d 36g36.3.23.2 Clock accuracy receive . 36g36.3.23.3 Send delay variation 36g36.3.24 Send and receive delay - round trip delay . 37g36.4 Codec specific requirements. 39g36.4.1 Objective listening speech quality MOS-LQO in send direction 39g36.4.2 Objective listening quality MOS-LQO in receive direct
19、ion . 40g36.4.3 Quality of jitter buffer adjustment 41g3Annex A (informative): Processing delays in VoIP terminals 43g3Annex B (informative): Optimum frequency responses for wideband transmission in receive direction - underlying subjective experiments 46g3Annex C (informative): Bibliography . 48g3H
20、istory 49g3ETSI ETSI ES 202 739 V1.5.1 (2017-01) 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 publicly available for ETSI members and non-members, and can
21、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/). Pursuant to the ETSI
22、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 present document. Foreword T
23、his 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 not“, “can“ and “cannot“ are to be interpreted as desc
24、ribed 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 telephones were interfacing switched-circuit 64 kbit/s
25、PCM networks. With the fast growth of IP networks, wideband terminals providing higher audio-bandwidth and 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 other devic
26、es 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 harmonised with specifications for traditional digital terminals. How
27、ever, 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 specific
28、issues. 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 test conditions and meaningful results. The present document provides speech transmission performance requirements
29、for wideband VoIP handset and headset terminals. NOTE: Requirement limits are given in tables, the associated curve when provided is given for illustration. ETSI ETSI ES 202 739 V1.5.1 (2017-01) 6 1 Scope The present document provides speech transmission performance requirements for 8 kHz wideband V
30、oIP 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 it is the intention of the present document to specify terminal equipment requirements which enable manufa
31、cturers 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 testing procedures taking into account further quality parameters as perceived by the user. 2 References 2.1 N
32、ormative 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 (including any amendment
33、s) applies. Referenced 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 foll
34、owing referenced documents are necessary for the application of the present document. 1 Recommendation ITU-T G.107: “The E-model, a computational model for use in transmission planning“. 2 Recommendation ITU-T G.108: “Application of the E-model: A planning guide“. 3 Recommendation ITU-T G.109: “Defi
35、nition of categories of speech transmission quality“. 4 Void. 5 Recommendation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. 6 Recommendation ITU-T G.722.1: “Low-complexity coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss“. 7 Recommendation ITU-T G.729.1: “G.7
36、29 based Embedded Variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. 8 Recommendation ITU-T P.56: “Objective measurement of active speech level“. 9 Recommendation ITU-T P.57: “Artificial ears“. 10 Recommendation ITU-T P.58: “Head and torso simulator
37、for telephonometry“. 11 Recommendation ITU-T P.64: “Determination of sensitivity/frequency characteristics of local telephone systems“. 12 Recommendation ITU-T P.79: “Calculation of loudness ratings for telephone sets“. 13 Recommendation ITU-T P.340: “Transmission characteristics and speech quality
38、parameters of hands-free terminals“. 14 Recommendation ITU-T P.380: “Electro-acoustic measurements on headsets“. 15 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. ETSI ETSI ES 202 739 V1.5.1 (2017-01) 7 16 Recommendation ITU-T P.502: “Objective test methods for speech communic
39、ation systems using complex test signals“. 17 Recommendation ITU-T P.581: “Use of head and torso simulator (HATS) for hands-free terminal testing“. 18 IEC 61260-1: “Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications“. 19 TIA-920.130-A: “Telecommunications Tele
40、phone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones with Headset“. 20 ETSI TS 103 224: “Speech and multimedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database“. 21 Recommendation ITU-T P.8
41、63: “Perceptual objective listening quality assessment“. 22 Recommendation ITU-T P.863.1: “Application Guide for Recommendation ITU-T P.863“. 23 ETSI ES 202 737: “Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband VoIP terminals (handset and headset) from a Qo
42、S perspective as perceived by the user“. 24 Recommendation ITU-T P.1010: “Fundamental voice transmission objectives for VoIP terminals and gateways“. 25 Recommendation ITU-T G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. 26 IETF RFC 3550: “RTP:
43、A Transport Protocol for Real-Time Applications“. 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 latest ve
44、rsion 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 present docum
45、ent 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-way speech quality a
46、cross networks“. i.2 ETSI EG 202 425: “Speech Processing, Transmission and Quality Aspects (STQ); Definition and implementation of VoIP reference point“. i.3 ETSI EG 202 396-3: “Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise; Part 3:
47、Background noise transmission - Objective test methods“. i.4 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) Terminology“. i.5 NIST Net. NOTE: Available at https:/www-x.antd.nist.gov/itg/nistnet/. i.6 Netem. NOTE: Available at http:/www.linuxfoundation.org/en/Net:Netem. ETSI ETSI ES 202 739
48、V1.5.1 (2017-01) 8 i.7 DAGA 2008: “Testing Wideband Terminals“, March 10-13, Dresden, Proceedings. Poschen S., Kettler F., Raake A., Spors S. i.8 Trace Control for Netem (TCN): “A. Keller, Trace Control for Netem, Semester Thesis SA-2006-15, ETH Zrich, 2006“. i.9 ETSI ES 202 739 (V1.2.1): “Speech Pr
49、ocessing, Transmission and Quality Aspects (STQ); Transmission requirements for wideband VoIP terminals (handset and headset) from a QoS perspective as perceived by the user“. 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
