1、 ETSI ES 202 739 V1.4.1 (2015-03) 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 V1.4.1 (2015-03) 2 Reference RES/STQ-204 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、 modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2015. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the ben
8、efit 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 V1.4.1 (2015-03) 3 Contents Intellectual Property Righ
9、ts 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-to-end co
10、nsiderations 9g34.3 Parameters to be investigated . 10g34.3.1 Basic parameters . 10g34.3.2 Further parameters with respect to speech processing devices . 10g35 Test equipment . 10g35.1 IP half channel measurement adaptor . 10g35.2 Environmental conditions for tests . 11g35.3 Accuracy of measurements
11、 and test signal generation . 11g35.4 Network impairment simulation . 11g35.5 Influence of terminal delay on measurements 12g36 Acoustic environment. 12g37 Requirements and associated measurement methodologies . 13g37.1 Test setup 13g37.1.1 Setup for handsets and headsets 13g37.1.2 Position and cali
12、bration of HATS . 14g37.1.3 Test signal levels . 14g37.1.4 Setup of background noise simulation 14g37.2 Coding independent parameters . 15g37.2.1 Send Frequency response 15g37.2.2 Send Loudness Rating (SLR) 16g37.2.3 Void 17g37.2.4 inearity range for SLR 17g37.2.5 Send distortion 18g37.2.6 Send nois
13、e . 18g37.2.7 SideTone Masking Rating STMR (mouth to ear) . 19g37.2.8 Sidetone delay . 19g37.2.9 Terminal Coupling Loss . 20g37.2.10 Stability loss 20g37.2.11 Receive frequency response 21g37.2.12 Receive Loudness Rating (RLR) 24g37.2.13 Receive distortion . 25g37.2.14 Minimum activation level and s
14、ensitivity in receive direction . 25g37.2.15 Receive noise 25g37.2.16 Automatic gain control in receive . 26g37.2.17 Double talk Performance 26g37.2.17.1 Attenuation range in send direction during double talk AH,S,dt26g37.2.17.2 Attenuation range in receive direction during double talk AH,R,dt27g37.
15、2.17.3 Detection of echo components during double talk 28g37.2.17.4 Minimum activation level and sensitivity of double talk detection . 29g3ETSI ETSI ES 202 739 V1.4.1 (2015-03) 4 7.2.18 Switching characteristics 29g37.2.18.1 Activation in send direction 30g37.2.18.2 Silence Suppression and Comfort
16、Noise Generation 30g37.2.19 Background noise performance 30g37.2.19.1 Performance in send in the presence of background noise 30g37.2.19.2 Speech quality in the presence of background noise . 31g37.2.19.3 Quality of background noise transmission (with far end speech) 32g37.2.20 Quality of echo cance
17、llation . 33g37.2.20.1 Temporal echo effects . 33g37.2.20.2 Spectral Echo Attenuation . 33g37.2.20.3 Occurrence of Artefacts 34g37.2.21 Variant Impairments; Network Dependant . 34g37.2.21.1 Send and Receive delay-Round trip delay 34g37.2.21.2 Void. 35g37.2.21.3 Quality of jitter buffer adjustment .
18、35g37.3 Codec Specific Requirements. 36g37.3.1 Send Delay 36g37.3.2 Receive delay 37g37.3.3 Objective listening speech quality MOS-LQOM in send direction 38g37.3.4 Objective listening quality MOS-LQOM in receive direction 39g37.3.4.1 Efficiency of Packet Loss Concealment (PLC) . 40g37.3.4.2 Efficien
19、cy of delay variation removal . 40g37.3.4.3 Quality of Jitter buffer adjustment 40g3Annex A (informative): Processing delays in VoIP terminals 42g3Annex B (informative): Bibliography . 45g3Annex C (informative): Optimum Frequency Responses for Wideband Transmission in Receive Direction - Underlying
20、Subjective Experiments . 46g3History 48g3ETSI ETSI ES 202 739 V1.4.1 (2015-03) 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 mem
21、bers 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 Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi
22、.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 SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the
23、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 “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ a
24、re 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 citation. Introduction Traditionally, the analogue and digital telephones were interfacing
25、 switched-circuit 64 kbit/s 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
26、, soft phones or other devices 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 harmonized with specifications for tradit
27、ional digital terminals. However, 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
28、 to address the IP specific 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 transmissi
29、on performance requirements 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 V1.4.1 (2015-03) 6 1 Scope The present document provides speech transmission performance requi
30、rements for 8 kHz wideband VoIP 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 requ
31、irements which enable manufacturers 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
32、the user. 2 References 2.1 Normative 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 reference docume
33、nt (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 guarantee their l
34、ong term validity. The following referenced documents are necessary for the application of the present document. 1 ETSI I-ETS 300 245-5: “Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 5: Wideband (7 kHz) handset telephony“. 2 Recommendation ITU-T
35、G.107: “The E-model, a computational model for use in transmission planning“. 3 Recommendation ITU-T G.108: “Application of the E-model: A planning guide“. 4 Recommendation ITU-T G.109: “Definition of categories of speech transmission quality“. 5 Void. 6 Recommendation ITU-T G.711: “Pulse code modul
36、ation (PCM) of voice frequencies“. 7 Recommendation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. 8 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“. 9 Recommendation ITU-T G.729.1: “G.729 based Embedded Variable
37、bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729“. 10 Recommendation ITU-T G.1020: “Performance parameter definitions for quality of speech and other voiceband applications utilizing IP networks“. 11 Recommendation ITU-T P.50: “Artificial voices“. 12 Recommen
38、dation ITU-T P.56: “Objective measurement of active speech level“. 13 Recommendation ITU-T P.57: “Artificial ears“. 14 Recommendation ITU-T P.58: “Head and torso simulator for telephonometry“. 15 Recommendation ITU-T P.64: “Determination of sensitivity/frequency characteristics of local telephone sy
39、stems“. ETSI ETSI ES 202 739 V1.4.1 (2015-03) 7 16 Recommendation ITU-T P.79: “Calculation of loudness ratings for telephone sets“. 17 Recommendation ITU-T P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 18 Recommendation ITU-T P.380: “Electro-acoustic me
40、asurements on headsets“. 19 Recommendation ITU-T P.501: “Test signals for use in telephonometry“. NOTE: At the publication date of the present document, annex C to P.501 is available as P.501, Amendment 2. 20 Recommendation ITU-T P.502: “Objective test methods for speech communication systems using
41、complex test signals“. 21 Recommendation ITU-T P.581: “Use of head and torso simulator (HATS) for hands-free terminal testing“. 22 Recommendation ITU-T P.862: “Perceptual Evaluation of Speech Quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networ
42、ks and speech codecs“. 23 IEC 61260: “Electroacoustics - Octave-band and fractional-octave-band filters“. 24 TIA/EIA L16-256: “TIA-920, Transmission Requirements for Wideband Digital Wireline Telephones, Telecommunications Industry Association“. 25 ETSI ES 202 396-1: “Speech and multimedia Transmiss
43、ion Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database“. 26 Recommendation ITU-T P.863: “Perceptual objective listening quality assessment“. 27 Recommendation ITU-T P.863.1: “Application Guide for
44、 Recommendation ITU-T P.863“. 28 ETSI ES 202 718: “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“. 29 Recommendation ITU-T G.723.1: “Dual rate spe
45、ech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s“. 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-specifi
46、c references, the latest version of the reference 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 applic
47、ation of the present document 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 fo
48、r one-way speech quality across 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
49、background noise; Part 3: Background noise transmission - Objective test methods“. i.4 Recommendation ITU-T P.800.1: “Mean Opinion Score (MOS) Terminology“. ETSI ETSI ES 202 739 V1.4.1 (2015-03) 8 i.5 ETSI TR 102 648-1: “Speech Processing, Transmission and Quality Aspects (STQ); Test Methodologies for ETSI Test Events and Results; Part 1: VoIP Speech Quality Testing“. i.6 NIST net. NOTE: Available at http:/snad.ncsl.nist.gov/itg/nistnet/. i.7 Netem. NOTE: Available at http:/www.linuxfoundation.org/en/Ne
