1、 ETSI TS 103 738 V1.1.2 (2010-09)Technical Specification Speech and multimedia Transmission Quality (STQ); Transmission requirements fornarrowband wireless terminals (handsfree)from a QoS perspective as perceived by the userETSI ETSI TS 103 738 V1.1.2 (2010-09)2Reference RTS/STQ-00166-2 Keywords spe
2、ech, 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
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6、written 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
7、of 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 regist
8、ered and owned by the GSM Association. ETSI ETSI TS 103 738 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 . 8g33.1 Definitions 8g33.2 Abbre
9、viations . 8g34 Configurations and interfaces . 8g34.1 Access networks . 9g34.2 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
10、hands-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 Calibratio
11、n and test signal level . 15g35.5.1 Send 15g35.5.2 Receive . 15g35.5.3 Setup of background noise simulation 15g35.6 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 r
12、equirements 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 21g36.1.2.3 Softphone (computer-based terminals) . 22g36.1.
13、2.4 Desktop Terminal 22g36.2 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 24g36.3 Send and
14、receive noise . 24g36.3.1 Send Noise 24g36.3.2 Receive Noise . 24g36.4 Send and receive distortion 25g36.4.1 Send distortion 25g3ETSI ETSI TS 103 738 V1.1.2 (2010-09)46.4.2 Receive distortion . 25g36.5 TCLw (or similar parameters) 26g36.5.1 Handheld, Softphone or Desktop Terminal 26g36.5.2 Vehicle m
15、ounted hands-free . 27g36.6 Stability Loss (or similar parameters) 27g36.7 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 Detection of echo components during double Talk 30g36.7.
16、4 Minimum activation level and sensitivity of double talk detection 32g36.8 Switching parameters . 32g36.8.1 Activation in Send Direction 32g36.8.2 Minimum activation level and sensitivity in Receive direction 33g36.8.3 Automatic level control 33g36.8.4 Silence Suppression and Comfort Noise Generati
17、on 33g36.9 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 34g36.9.3 Quality of Background Noise Transmission (with Far End Speech) 35g36.9.4 Quality of Background Noise Transmission
18、 (with Near End Speech) 36g36.10 Quality of echo cancellation . 36g36.10.1 Temporal echo effects . 36g36.10.2 Spectral Echo Attenuation 36g36.10.3 Occurrence of Artefacts 37g36.11 Send and receive delay or round trip delay 37g36.12 Objective listening Quality in send and receive direction 39g37 Code
19、c dependent requirements and associated Measurement Methodologies . 39g37.1 Speech Coders 39g37.2 Send and receive delay or round trip delay 40g37.3 Objective listening Quality in send and receive direction 40g38 Requirements and associated Measurement Methodologies (with an additional radio link be
20、tween the terminal and external electroacoustical devices) 40g3Annex A (informative): Bibliography . 41g3History 42g3ETSI ETSI TS 103 738 V1.1.2 (2010-09)5Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pert
21、aining 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 ETSI standards“, which is available from the ETSI Secret
22、ariat. 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 existence of other IPRs not referenced in ETSI SR 000 314 (or
23、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). Introduction The present document covers wireless spe
24、ech terminals. It aims to enhance the interoperability and end-to-end quality with all other types of terminals. ETSI ETSI TS 103 738 V1.1.2 (2010-09)61 Scope The present document provides speech transmission performance requirements for wireless terminals; it addresses all types of wireless termina
25、ls, 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 terminal equipment requirements which enable manufacturers and servi
26、ce 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 electroacoustical devices is used (e.g. Blue
27、tooth link), 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 procedures taking into account fu
28、rther 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 performance, as well as the use in no
29、isy 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 be connected to public networks
30、 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 cited version applies. For non-specific references, the latest version of the ref
31、erence 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 included in this clause were valid at the time of publication ETSI cannot guara
32、ntee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI TS 126 171: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); AMR speech codec, wideba
33、nd; General description (3GPP TS 26.171 version 6.0.0 Release 6)“. 2 ITU-T Recommendation G.122: “Influence of national systems on stability and talker echo in international connections“. 3 ITU-T Recommendation G.131: “Talker echo and its control“. 4 ITU-T Recommendation G.711: “Pulse code modulatio
34、n (PCM) of voice frequencies“. 5 ITU-T Recommendation G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)“. ETSI ETSI TS 103 738 V1.1.2 (2010-09)76 ITU-T Recommendation G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear predicti
35、on (CS-ACELP)“. 7 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“. 8 ITU-T Recommendation P.50: “Artificial voices“. 9 ITU-T Recommendation P.56: “Objective measurement of active speech level“. 10
36、 ITU-T Recommendation P.58: “Head and torso simulator for telephonometry“. 11 ITU-T Recommendation P.79: “Calculation of loudness ratings for telephone sets“. 12 ITU-T Recommendation P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 13 ITU-T Recommendation
37、P.342: “Transmission characteristics for narrow-band digital loudspeaking and hands-free telephony terminals“. 14 ITU-T Recommendation P.501: “Test signals for use in telephonometry“. 15 ITU-T Recommendation P.502: “Objective test methods for speech communication systems using complex test signals“.
38、 16 ITU-T Recommendation P.581: “Use of head and torso simulator (HATS) for hands-free terminal testing“. 17 ITU-T Recommendation O.41: “Psophometer for use on telephone-type circuits“. 18 ISO 3 (1973): “Preferred numbers - Series of preferred numbers“. 19 ETSI TS 146 010: “Digital cellular telecomm
39、unications 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)“. 2.2 Informative references The following referenced documents
40、are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ITU-T Recommendation P.64: “Determination of sensitivity/frequency characteristics of local telephone systems“. i.2 ITU-T Recommendation P.1100: “Narrowband hands-free
41、 communication in motor vehicles“. i.3 IEC 61672 (Edition 1.0): “Electroacoustics - Sound level meters“. i.4 ETSI EG 202 396-1: “Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and backgro
42、und noise database“. i.5 ETSI EG 202 396-3: “Speech Processing, Transmission and Quality Aspects (STQ); Speech Quality performance in the presence of background noise Part 3: Background noise transmission - Objective test methods“. . ETSI ETSI TS 103 738 V1.1.2 (2010-09)83 Definitions and abbreviati
43、ons 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 impe
44、dance 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 decoder operating in opposite directions of transmission in the same equipment freefield equalization: artificial head is equalized in such a
45、 way that for frontal sound incidence in anechoic conditions the frequency response of the artificial head is flat 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 Simulato
46、r (HATS) for telephonometry: manikin extending downward from the top of the head to the waist, designed to simulate 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 (
47、MRP): point located on axis and 25 mm in front of the lip plane of a mouth simulator nominal setting of the volume 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 th
48、e purposes of the present document, the following abbreviations apply: a.c. alternative current AH,S,dtattenuation range in send direction during double talk AMR Adaptive Multi-Rate codec CS Composite Source CSS Composite Source Signal DECT Digital Enhanced Cordless Telecommunications DFT Discrete F
49、ourrier Transform DRP Drum Reference Point DRP ear Drum Reference Point EL Echo lossGSM Global System for Mobile communication HATS Head And Torso Simulator HF Hands Free HFRP Hands Free Reference Point MRP Mouth Reference Point NB Narrow bandPLC Packet Loss Concealment PN Pseudo random noisePOI Point Of Interconnect QoS Quality of Service RLR max Receive Loudness Rating corresponding to the maximum setting of the volume control RLR Receive Loudness Rating SLR Send Loudness Rating TCLwTerminal Coupling Loss (weighted) TCLwst
