1、 ETSI TS 103 740 V1.1.2 (2010-09)Technical Specification Speech and multimedia Transmission Quality (STQ);Transmission requirementsfor wideband wireless terminals (handsfree)from a QoS perspective as perceived by the userETSI ETSI TS 103 740 V1.1.2 (2010-09)2Reference RTS/STQ-00166-4 Keywords speech
2、, 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 Individual copies of the present doc
3、ument can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of disp
4、ute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other E
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6、tten permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2010. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of
7、its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registere
8、d and owned by the GSM Association. ETSI ETSI TS 103 740 V1.1.2 (2010-09)3Contents Intellectual Property Rights 5g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbrevia
9、tions . 8g34 Configurations and interfaces . 8g34.1 Access networks . 8g34.2 Additional (radio) links between the terminal and external electroacoustical devices . 9g35 Test Configurations 9g35.1 Set-up interface 9g35.2 Set-up for terminals 9g35.2.1 Hand-held terminal . 10g35.2.2 Vehicle mounted han
10、ds-free . 10g35.2.3 Desktop hands-free terminal . 11g35.2.4 Additional test setup for handsfree function with softphone 12g35.2.4.1 Softphone including speakers and microphone . 12g35.2.4.2 Softphone with separate speakers . 13g35.3 Acoustical environment 14g35.4 Test signals . 14g35.5 Calibration a
11、nd test signal level . 15g35.5.1 Send 15g35.5.2 Receive . 15g35.5.3 Setup of background noise simulation 16g35.6 Environmental conditions for tests . 16g35.7 Accuracy of test equipment 17g35.8 Power feeding conditions . 17g35.9 Influence of terminal delay on measurements 17g36 Codec independent requ
12、irements and associated Measurement Methodologies 18g36.1 Send and receive frequency response . 18g36.1.1 Send frequency response 18g36.1.2 Receive frequency response 19g36.1.2.1 Handheld terminal . 19g36.1.2.2 Vehicle mounted hands-free 20g36.1.2.3 Softphone (computer-based terminals) . 21g36.1.2.4
13、 Desktop Terminal 21g36.2 Send and receive loudness ratings 22g36.2.1 Send Loudness Ratings . 22g36.2.2 Receive Loudness Ratings 22g36.2.2.1 Handheld terminal . 22g36.2.2.2 Vehicle mounted hands-free 23g36.2.2.3 Softphone (computer-based terminals) . 23g36.2.2.4 Desktop Terminal 23g36.3 Send and rec
14、eive noise . 24g36.3.1 Send Noise 24g36.3.2 Receive Noise . 24g36.4 Send and receive distortion 24g36.4.1 Send distortion 25g3ETSI ETSI TS 103 740 V1.1.2 (2010-09)46.4.2 Receive distortion . 25g36.5 TCLw (or similar parameters) 26g36.5.1 Handheld Terminal . 26g36.5.2 Vehicle mounted hands-free . 27g
15、36.5.3 Softphone (computer-based terminals) . 27g36.5.4 Desktop Terminal . 27g36.6 Stability Loss (or similar parameters) 28g36.7 Double talk performance 28g36.7.1 Attenuation Range in Send Direction during Double Talk . 28g36.7.2 Attenuation Range in Receive Direction during Double Talk 30g36.7.3 D
16、etection of echo components during double Talk 31g36.7.4 Minimum activation level and sensitivity of double talk detection 32g36.8 Switching parameters . 32g36.8.1 Activation in Send Direction 33g36.8.2 Minimum activation level and sensitivity in Receive direction 34g36.8.3 Automatic level control 3
17、4g36.8.4 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 the Presence of Background Noise 35g36.9.3 Quality of Background Noise Transmission (with Far End Spe
18、ech) 36g36.9.4 Quality of Background Noise Transmission (with Near End Speech) 36g36.10 Quality of echo cancellation . 37g36.10.1 Temporal echo effects . 37g36.10.2 Spectral Echo Attenuation 37g36.10.3 Occurrence of Artefacts 38g36.11 Send and receive delay or round trip delay 38g36.12 Objective lis
19、tening Quality in send and receive direction 40g37 Codec dependent requirements and associated Measurement Methodologies . 40g37.1 Speech Coders 40g37.2 Send and receive delay or round trip delay 40g37.3 Objective listening Quality in send and receive direction 40g38 Requirements and associated Meas
20、urement Methodologies (with an additional radio link between the terminal and external electroacoustical devices) 40g3Annex A (informative): Bibliography . 41g3History 42g3ETSI ETSI TS 103 740 V1.1.2 (2010-09)5Intellectual Property Rights IPRs essential or potentially essential to the present docume
21、nt 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 to ETSI in respect of E
22、TSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). 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 existen
23、ce 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 This Technical Specification (TS) has been produced by ETSI Technical Committee Speech and multimedia Transmission Quality (STQ)
24、. 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. ETSI ETSI TS 103 740 V1.1.2 (2010-09)61 Scope The present document provides speech transmission performance requirements for wireles
25、s 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 standards which define minimum performance requirements it is the intention of the present document to specify term
26、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 ter
27、minal and external electroacoustical devices is used (e.g. Bluetooth link), the present document 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 presen
28、t 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 compatibility across access networks with all types of terminals. It is the aim to optimize the listening an
29、d 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, the present document will consider the limitations in audio performance due to different form factors (e.g. si
30、ze, shape). Terminals which are not intended to be connected to public networks are outside the scope of the present document. 2 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 ci
31、ted version applies. For non-specific references, the latest version of the reference document (including any amendments) 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
32、included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI EG 202 396-1: “Speech and multimedia Transmission Quality (STQ);
33、 Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database“. 2 ITU-T Recommendation G.122: “Influence of national systems on stability and talker echo in international connections“. 3 ITU-T Recommendation G.722: “7 kHz
34、 audio-coding within 64 kbit/s“. 4 ITU-T Recommendation G.729.1: “G.729-based Embedded Variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. 5 ITU-T Recommendation G.131: “Talker echo and its control“. ETSI ETSI TS 103 740 V1.1.2 (2010-09)76 ITU-T Recom
35、mendation P.50: “Artificial voices“. 7 ITU-T Recommendation P.56: “Objective measurement of active speech level“. 8 ITU-T Recommendation P.58: “Head and torso simulator for telephonometry“. 9 ITU-T Recommendation P.79 and Corrigendum 2 (2001): “Calculation of loudness ratings for telephone sets“. 10
36、 ITU-T Recommendation P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 11 ITU-T Recommendation P.341: “Transmission characteristics for wideband (150-7 000 Hz) digital hands-free telephony terminals“. 12 ITU-T Recommendation P.501: “Test signals for use in
37、 telephonometry“. 13 ITU-T Recommendation P.581: “Use of head and torso simulator (HATS) for hands-free and handset terminal testing“. 14 ISO 3 (1973): “Preferred numbers - Series of preferred numbers“. 15 ITU-T Recommendation G.711.1: “Wideband embedded extension for G.711 pulse code modulation“. 1
38、6 ITU-T Recommendation G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. 17 IEC 61672: “Electroacoustics - Sound level meters“. 2.2 Informative references The following referenced documents are not necessary for the application of the present docum
39、ent but they assist the user with regard to a particular subject area. i.1 ITU-T Recommendation P.502: “Objective test methods for speech communication systems using complex test signals“. i.2 ETSI EG 202 396-3: “Speech Processing, Transmission and Quality Aspects (STQ); Speech Quality performance i
40、n the presence of background noise Part 3: Background noise transmission - Objective test methods“. i.3 ITU-T Recommendation 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
41、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
42、 of an analogue-to-digital encoder and a digital-to-analogue decoder operating in opposite directions of transmission in the same equipment freefield equalization: artificial head is equalized in such a way that for frontal sound incidence in anechoic conditions the frequency response of the artific
43、ial head is flat ETSI ETSI TS 103 740 V1.1.2 (2010-09)8freefield reference point: point located in the free sound field, at least in 1,5 m distance from a sound source radiating in free air (in case of a head and torso simulator HATS in the center of the artificial head with no artificial head prese
44、nt) handsfree telephony terminal: telephony terminal using a loudspeaker associated with an amplifier as a telephone receiver and which can be used without a handset Head And Torso Simulator (HATS) for telephonometry: manikin extending downward from the top of the head to the waist, designed to simu
45、late the sound pick-up characteristics and the acoustic diffraction produced by a median human adult and to reproduce the acoustic field generated by the human mouth Mouth Reference Point (MRP): is located on axis and 25 mm in front of the lip plane of a mouth simulator nominal setting of the volume
46、 control: when a receive volume control is provided, the setting which is closest to the nominal RLR softphone: speech communication system based upon a computer 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: a.c. alternative current CSS Composite Sour
47、ce Signal DECT Digital Enhanced Cordless Telecommunications DRP ear Drum Reference Point EL Echo Loss HATS Head And Torso Simulator HFRP Hands Free Reference Point HFT Hands-Free Terminal LE Earcap Leakage NOTE: See ITU-T Recommendation P.79 9. MOS-LQOy Mean Opinion Score - Listening Quality Objecti
48、ve MRP Mouth Reference PointNOTE: See ITU-T Recommendation P.800.1 i.3. NLP Non Linear Processor PN Pseudo Noise POI Point Of Interconnect QoS Quality of Service RLR Receive Loudness Rating SLR Send Loudness Rating TCLw Terminal Coupling Loss (weighted) TELR Talker Echo Loudness Rating VoDN Voice ov
49、er Data Network 4 Configurations and interfaces The present document is intended to be applicable for different wireless access networks and for additional radio links. 4.1 Access networks The present document applies to any wireless terminal whatever the access network, e.g. GSM, UMTS, DECT, Bluetooth, WIFI, WIMAX, CDMA, etc. ETSI ETSI TS 103 740 V1.1.2 (2010-09)94.2 Additional (radio) links between the terminal and external electroacoustical devices The present document also applies when an additional radio link exists between t
