1、 ETSI ES 202 718 V1.3.1 (2017-09) Speech and multimedia Transmission Quality (STQ); Transmission Requirements for IP-based Narrowband and Wideband Home and Network Media Gateways from a QoS Perspective as Perceived by the User ETSI STANDARD ETSI ETSI ES 202 718 V1.3.1 (2017-09) 2 Reference RES/STQ-2
2、52 Keywords QoS, speech 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 ca
3、n 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 a
4、ny existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may
5、 be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https:/portal.et
6、si.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 wi
7、thout 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 ET
8、SI 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 ES 202 718 V1.3.1 (2017-09) 3 Contents Intellectual Property Right
9、s 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 . 9g34 General considerations . 10g34.1 Default Coding Algorithm 10g34.2 End-
10、to-end considerations 10g34.3 Parameters to be investigated . 11g34.3.1 Applicability of parameters to different MGWs . 11g35 Test equipment . 12g35.1 IP half channel measurement adaptor . 12g35.2 Environmental conditions for tests . 12g35.3 Accuracy of measurements and test signal generation . 13g3
11、5.4 Network impairment simulation . 13g36 Requirements and associated Measurement Methodologies 14g36.0 General . 14g36.1 Test setup 14g36.1.0 General 14g36.1.1 Setup for Media Gateways with 4-wire interface . 15g36.1.2 Setup for Media Gateways with 2-wire interface . 15g36.1.3 Setup for Media Gatew
12、ays with Wireless Access . 16g36.1.4 Setup for IP-to-IP Media Gateways 17g36.1.5 Test Signal Levels . 17g36.1.6 Background noise simulation 17g36.1.7 Echo paths . 18g36.2 Coding independent parameters . 19g36.2.1 Send Frequency response 19g36.2.2 Circuit Loudness Rating in Send 20g36.2.3 Linearity R
13、ange for CLR (SND) . 20g36.2.4 Send Distortion . 22g36.2.5 Spurious Out-of-Band Signals in Send direction 22g36.2.6 Send Noise 23g36.2.7 Receive Frequency Response . 23g36.2.8 Circuit Loudness Rating in Receive . 24g36.2.9 Linearity Range for CLR (RCV) 25g36.2.10 Receive Distortion 26g36.2.11 Out-of
14、-Band Signals Wideband to Narrowband Transcoding 27g36.2.12 Spurious Out-of-band Signals Narrowband to Wideband Transcoding 27g36.2.13 Minimum Activation Level and Sensitivity in Receive Direction 28g36.2.14 Receive Noise . 28g36.2.15 Double Talk Performance . 29g36.2.15.0 General 29g36.2.15.1 Atten
15、uation Range in Send Direction during Double Talk AH,S,dt. 29g36.2.15.2 Attenuation Range in Receive Direction during Double Talk AH,R,dt30g36.2.15.3 Detection of Echo Components during Double Talk 31g3ETSI ETSI ES 202 718 V1.3.1 (2017-09) 4 6.2.15.4 Minimum Activation Level and Sensitivity of Doubl
16、e Talk Detection 33g36.2.16 Switching Characteristics . 33g36.2.16.0 General 33g36.2.16.1 Activation in Send Direction . 34g36.2.16.2 Activation in Receive Direction 34g36.2.16.3 Silence Suppression and Comfort Noise Generation 35g36.2.17 Background Noise Performance . 35g36.2.17.0 General 35g36.2.1
17、7.1 Performance in Send Direction in the Presence of Background Noise . 35g36.2.17.2 Quality of Speech with Background Noise . 36g36.2.17.3 Quality of Background Noise Transmission (with Far End Speech) 37g36.2.17.4 Quality of Background Noise Transmission (with Near End Speech) 38g36.2.18 Quality o
18、f Echo Cancellation 38g36.2.18.0 General 38g36.2.18.1 Echo Performance According to Recommendation ITU-T G.168 38g36.2.18.2 Terminal Coupling Loss (TCLw, NB) 39g36.2.18.3 Terminal Coupling Loss (TCL, WB) 39g36.2.18.4 Temporal Echo Effects 40g36.2.18.5 Spectral Echo Attenuation . 41g36.2.18.6 Occurre
19、nce of Artefacts 41g36.2.18.7 Variable Echo Paths 41g36.2.19 Variant Impairments; Network dependant 42g36.2.19.1 Clock Accuracy Send 42g36.2.19.2 Clock Accuracy Receive . 42g36.2.19.3 Send Packet Delay Variation. 42g36.2.20 Immunity to DTMF False Detection in Send Direction 43g36.2.21 Send and recei
20、ve delay - round trip delay . 43g36.3 Codec Specific Requirements. 44g36.3.1 Objective Listening Speech Quality MOS-LQO in Send direction 44g36.3.2 Objective Listening Quality MOS-LQO in Receive direction 45g36.3.3 Quality of Jitter buffer adjustment 48g3Annex A (informative): Impulse Response of a
21、Narrowband and Wideband DECT PP 50g3Annex B (normative): Test signal for immunity to DTMF false detection in send direction 52g3Annex C (informative): Example IP Delay variation 53g3Annex D (informative): Bibliography . 54g3History 55g3ETSI ETSI ES 202 718 V1.3.1 (2017-09) 5 Intellectual Property Ri
22、ghts 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 000 314: “Intellectual Property Right
23、s (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 investigation, including IPR searches, has
24、 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 document may include trademarks and/or trade
25、names 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 the present document does not consti
26、tute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This 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“,
27、“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 deliverables except when used in direct citatio
28、n. Introduction Traditionally, the analogue and digital telephones were interfacing switched-circuit 64 kbit/s PCM networks. With the fast growth of IP networks, packet-switched networks (VoIP) interfacing PSTN networks and mobile networks, as well as different types of IP-terminals, are being rapid
29、ly introduced. Different types of gateways are used to interconnect to such IP networks. 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 harmonized between these different types of network
30、 from an end-to-end perspective, including specifications for the edge points. The present document covers IP-based narrowband and wideband home and network media gateways. It aims to enhance the interoperability and end-to-end quality. In contrast to other standards which define minimum performance
31、 requirements, it is the intention of the present document to specify gateway equipment requirements which enable manufacturers and service providers to enable end-to-end speech performance as perceived by the user. These requirements are absolutely necessary to ensure a good quality, but they are n
32、ot sufficient. They have to be combined with requirements (and associated relevant measurement methods) for other elements in the transmission chain (core IP network, PSTN, terminals), as well as for the whole mouth-to-ear transmission path. ETSI ETSI ES 202 718 V1.3.1 (2017-09) 6 1 Scope The presen
33、t document provides speech transmission performance requirements for narrowband and wideband media gateways from a QoS perspective as perceived by the user. Media gateways can be network or home based, they may include a transcoding function. The present document covers the following types of IP-bas
34、ed media gateways: ATA (Analogue Terminal Adapter), home gateway IP to POTS ITA (ISDN Terminal Adapter), home gateway IP to ISDN IAD (Integrated Access device), home router including ATA or ITA Network based ATA and ITA Carrier grade media gateway, network gateway IP to TDM IP-to-IP media gateway, n
35、etwork gateway with transcoding and/or other media processing New Generation DECT Fixed part with IP interface (only parameters not covered by New Generation DECT) Interfaces of media gateways used together with terminals as a system (i.e. connected via Ethernet or with a proprietary interface) are
36、excluded in the present document and should be measured according to the relevant terminal standard. If a media gateway includes more than one interface type (e.g. POTS and ISDN), each interface has to be dealt with differently. The requirements available in the present document will ensure a high c
37、ompatibility with IP-and TDM-based fixed and wireless terminals and networks, including DECT and mobile terminals. It is the aim to optimize interoperability, the listening and talking quality and the conversational performance. Related requirements and test methods are defined in the present docume
38、nt. The present document does not apply to media gateways with 4-wire analogue interfaces. The requirements for MGWs with respect to voiceband data (VBD) are out of scope in the present document. These requirements are covered in ETSI TS 102 929 i.5. 2 References 2.1 Normative references References
39、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 amendments) applies. Referenced document
40、s 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 term validity. The following referenced documents ar
41、e necessary for the application of the present document. 1 ETSI EN 300 726: “Digital cellular telecommunications system (Phase 2+) (GSM); Enhanced Full Rate (EFR) speech transcoding (GSM 06.60)“. 2 ETSI TS 126 171 (V6.0.0): “Digital cellular telecommunications system (Phase 2+); Universal Mobile Tel
42、ecommunications System (UMTS); AMR speech codec, wideband; General description (3GPP TS 26.171 version 6.0.0 Release 6)“. ETSI ETSI ES 202 718 V1.3.1 (2017-09) 7 3 Recommendation ITU-T G.107: “The E-model, a computational model for use in transmission planning“. 4 Recommendation ITU-T G.108, includi
43、ng amendments 1 and 2: “Application of the E-model: A planning guide“. 5 Recommendation ITU-T G.109: “Definition of categories of speech transmission quality“. 6 Recommendation ITU-T G.100.1: “The use of the decibel and of relative levels in speechband telecommunications“. 7 Recommendation ITU-T G.1
44、11: “Loudness Ratings (LRs) in an international connection“. 8 Recommendation ITU-T G.122: “Influence of national systems on stability and talker echo in international connections“. 9 Recommendation ITU-T G.711: “Pulse code modulation (PCM) of voice frequencies“. 10 Recommendation ITU-T G.723.1: “Du
45、al rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s“. 11 Recommendation ITU-T G.726: “40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)“. 12 Recommendation ITU-T G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-ex
46、cited linear prediction (CS-ACELP)“. 13 Recommendation 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“. 14 Void. 15 Recommendation ITU-T P.863.1: “Application guide for Recommendation ITU-T P.863“. 16 Recommenda
47、tion ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 17 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. 18 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 19 Rec
48、ommendation ITU-T P.56: “Objective measurement of active speech level“. 20 IEC 61260-1: “Electroacoustics - Octave-band and fractional-octave-band filters. - Part 1: Specification“. 21 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) terminology“. 22 ETSI TS 102 971: “Access and Terminals (AT
49、); Public Switched Telephone Network (PSTN); Harmonized specification of physical and electrical characteristics of a 2-wire analogue interface for short line interface“. 23 ETSI ES 201 970: “Access and Terminals (AT); Public Switched Telephone Network (PSTN); Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented Network Termination Point (NTP)“. 24 Recommendation ITU-T G.168: “Digital network echo cancellers“. 25 Recommendation ITU-T P.863: “Perceptual objective lis
