1、 ETSI ES 202 718 V1.2.1 (2014-10) Speech and multimedia Transmission Quality (STQ); Transmission Requirements for IP-based Narrowband and Wideband Home Gateways and Other Media Gateways from a QoS Perspective as Perceived by the User ETSI STANDARD ETSI ETSI ES 202 718 V1.2.1 (2014-10) 2Reference RES
2、/STQ-214 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 docum
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6、upport.asp 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 without the written authorizati
7、on of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2014. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are T
8、rade 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 202 718 V1.2.1 (2014-10) 3Contents Intellectual Property Rights 5g3Foreword . 5g3Modal verbs terminolog
9、y 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-to-end considerations 10g34.3 Parameters
10、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 . 13g35.4 Network impairment simulation . 13g36
11、 Requirements and associated Measurement Methodologies 14g36.1 Test setup 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 Gateways with Wireless Access . 16g36.1.4 Setup for IP-to-IP Media Gateways 16g36.
12、1.5 Test Signal Levels . 17g36.1.6 Background noise simulation 17g36.1.7 Echo paths . 17g36.2 Coding independent parameters . 18g36.2.1 Send Frequency response 18g36.2.2 Circuit Loudness Rating in Send 19g36.2.3 Linearity Range for CLR (SND) . 19g36.2.4 Send Distortion . 21g36.2.5 Spurious Out-of-Ba
13、nd Signals in Send direction 21g36.2.6 Send Noise 22g36.2.7 Receive Frequency Response . 22g36.2.8 Circuit Loudness Rating in Receive . 23g36.2.9 Linearity Range for CLR (RCV) 23g36.2.10 Receive Distortion 25g36.2.11 Out-of-Band Signals Wideband to Narrowband Transcoding 25g36.2.12 Spurious Out-of-b
14、and Signals Narrowband to Wideband Transcoding 26g36.2.13 Minimum Activation Level and Sensitivity in Receive Direction 27g36.2.14 Receive Noise . 27g36.2.15 Double Talk Performance . 27g36.2.15.1 Attenuation Range in Send Direction during Double Talk AH,S,dt. 28g36.2.15.2 Attenuation Range in Recei
15、ve Direction during Double Talk AH,R,dt29g36.2.15.3 Detection of Echo Components during Double Talk 30g36.2.15.4 Minimum Activation Level and Sensitivity of Double Talk Detection 32g36.2.16 Switching Characteristics . 32g3ETSI ETSI ES 202 718 V1.2.1 (2014-10) 46.2.16.1 Activation in Send Direction .
16、 33g36.2.16.2 Activation in Receive Direction 34g36.2.16.3 Silence Suppression and Comfort Noise Generation 34g36.2.17 Background Noise Performance . 35g36.2.17.1 Performance in Send Direction in the Presence of Background Noise . 35g36.2.17.2 Quality of Speech with Background Noise . 36g36.2.17.3 Q
17、uality of Background Noise Transmission (with Far End Speech) 37g36.2.17.4 Quality of Background Noise Transmission (with Near End Speech) 37g36.2.18 Quality of Echo Cancellation 38g36.2.18.1 Echo Performance According to Recommendation ITU-T G.168 38g36.2.18.2 Terminal Coupling Loss (TCLw, NB) 38g3
18、6.2.18.3 Terminal Coupling Loss (TCL, WB) 39g36.2.18.4 Temporal Echo Effects 39g36.2.18.5 Spectral Echo Attenuation . 40g36.2.18.6 Occurrence of Artefacts 40g36.2.19 Variant Impairments; Network dependant 41g36.2.19.1 Clock Accuracy Send 41g36.2.19.2 Clock Accuracy Receive . 41g36.2.19.3 Send Delay
19、Variation 41g36.2.20 Immunity to DTMF False Detection in Send Direction 42g36.3 Codec Specific Requirements. 42g36.3.1 Roundtrip delay 42g36.3.1.1 Send Delay 43g36.3.1.2 Receive delay 44g36.3.2 Delay for IP-to-IP MGW 46g36.3.3 Objective Listening Speech Quality MOS-LQO in Send direction 46g36.3.4 Ob
20、jective Listening Quality MOS-LQO in Receive direction 47g36.3.4.1 Efficiency of Packet Loss Concealment (PLC) . 49g36.3.4.2 Quality of Jitter buffer adjustment 49g3Annex A (informative): Impulse Response of a Narrowband and Wideband DECT PP 51g3Annex B (normative): Test signal for immunity to DTMF
21、false detection in send direction 53g3Annex C (informative): Example IP Delay variation 54g3Annex D (informative): Bibliography . 55g3History 56g3ETSI ETSI ES 202 718 V1.2.1 (2014-10) 5Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared
22、 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 ETSI standards“, which is
23、available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). 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 S
24、R 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 ETSI Standard (ES) has been produced by ETSI Technical Committee Speech and multimedia Transmission Quality (STQ). Modal verbs terminology In the present document “
25、shall“, “shall not“, “should“, “should not“, “may“, “may not“, “need“, “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 deliver
26、ables except when used in direct citation. 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 differen
27、t types of IP-terminals, are being rapidly 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
28、between these different types of network from an end-to-end perspective, including specifications for the edge points. The present document covers IP-based narrowband and wideband home gateways and other media gateways. It aims to enhance the interoperability and end-to-end quality. In contrast to o
29、ther standards which define minimum performance 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 nec
30、essary to ensure a good quality, but they are not 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 E
31、S 202 718 V1.2.1 (2014-10) 61 Scope The present 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
32、 document covers the following types of IP-based 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, netwo
33、rk gateway IP to TDM IP-to-IP media gateway, network 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
34、Ethernet or with a proprietary interface) are 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 availabl
35、e in the present document will ensure a high compatibility 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
36、test methods are defined in the present document. 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 TS 102 929 i.7. 2 Refere
37、nces 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 reference document (including any amendments) applies. Refe
38、renced 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. 2.1 Normative references
39、 The following referenced documents are 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: “Digital cellular telecommunications system (Ph
40、ase 2+); Universal Mobile Telecommunications System (UMTS); AMR speech codec, wideband; General description (3GPP TS 26.171 version 6.0.0 Release 6)“. ETSI ETSI ES 202 718 V1.2.1 (2014-10) 73 Recommendation ITU-T G.107: “The E-model, a computational model for use in transmission planning“. 4 Recomme
41、ndation ITU-T G.108, including 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“
42、. 7 Recommendation ITU-T G.111: “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 Recom
43、mendation ITU-T G.723.1: “Dual 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
44、-structure algebraic-code-excited 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 Recommendation ITU-T G.1020: “Performance parameter definitions for quality
45、of speech and other voiceband applications utilizing IP networks“. 15 Recommendation ITU-T P.863.1: “Application guide for Recommendation ITU-T P.863“. 16 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 17 Recommendation ITU-T P.501:
46、“Test signals for use in telephonometry“. 18 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using complex test signals“. 19 ISO 3 (1973): “Preferred numbers - Series of preferred numbers“. 20 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) terminology“.
47、21 ETSI TS 102 971: “Access and Terminals (AT); Public Switched Telephone Network (PSTN); Harmonized specification of physical and electrical characteristics of a 2-wire analogue interface for short line interface“. 22 ETSI ES 201 970: “Access and Terminals (AT); Public Switched Telephone Network (P
48、STN); Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented Network Termination Point (NTP)“. 23 Recommendation ITU-T G.168: “Digital network echo cancellers“. 24 Recommendation ITU-T P.863: “Perceptual objective listening quality assessment“. 25 Recommen
49、dation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. 26 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“. 27 Recommendation ITU-T G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. ETSI ETSI ES 202 718 V1.2.1 (2014-10) 82.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with
