1、 ETSI TR 143 058 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Characterisation, test methods and quality assessment for handsfree Mobile Stations (MSs) (3GPP TR 43.058 version 15.0.0 Release 15) TECHNICAL REPORT GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TR 1
2、43 058 V15.0.0 (2018-07)13GPP TR 43.058 version 15.0.0 Release 15Reference RTR/TSGS-0443058vf00 Keywords GSM 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 enregistr
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9、ciation. ETSI ETSI TR 143 058 V15.0.0 (2018-07)23GPP TR 43.058 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publ
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14、hip Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI ident
15、ities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “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 expres
16、sion of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 143 058 V15.0.0 (2018-07)33GPP TR 43.058 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope
17、6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Characteristics, test methods and quality assessment . 7g34.1 Environmental conditions for a car type handsfree Mobile Station . 7g34.1.1 Data available on real use environment 7g34.1.1.1 Reverberatio
18、n and echo . 7g34.1.1.2 Sources and types of noise. Level and Spectra of the noise 8g34.1.1.2.1 Noise due to engine, tyres and moving situations . 8g34.1.1.2.2 Noise due to equipment inside the cars . 13g34.1.1.2.3 Signal to noise ratio in the car situation . 14g34.1.1.3 Noise and echo 15g34.1.2 Env
19、ironment for testing handsfree mobile station 17g34.1.2.1 Classification of handsfree mobile terminals 17g34.1.2.2 Vehicle simulator 17g34.1.2.2.1 Cost estimation for a vehicle simulator for handsfree testing 17g34.1.2.3 Advisory text for installation of handsfree MS in a vehicle environment . 18g34
20、.1.2.4 Test environment . 18g34.1.2.4.1 Anechoic room 18g34.1.2.4.2 “ Real use “ situation (Handsfree in a real car or in a car simulator) . 18g34.1.3 Measurements on a GSM handsfree telephone - Influence of the environment and the test conditions on frequency responses and loudness ratings . 19g34.
21、2 Delay in handsfree terminals implemented with signal processing techniques 22g34.2.1 Signal processing techniques for acoustic echo cancelling and noise reduction . 22g34.2.2 Examples of delays due to signal processing techniques 22g34.2.2.1 Data produced by Matra Communication . 22g34.2.2.2 Data
22、produced by Ericsson 23g34.3 Speech quality assessment 24g34.3.1 General - Factors affecting the speech quality of the GSM system and derivatives . 24g34.3.2 Main Assessment Criteria for Handsfree processing used in GSM mobile environment . 27g34.3.3 Evaluation Methodology for Full-Duplex Acoustic E
23、cho Controllers developed within the FREETEL-Esprit project 28g34.3.3.1 Objective Evaluation procedure 28g34.3.3.1.1 Objective Evaluation methodology of AEC devices . 29g34.3.3.1.2 Test Signals used from the FREETEL-Esprit Database 32g34.3.3.2 Adapted objective evaluation procedure to a GSM Handsfre
24、e mobile . 32g34.3.3.2.1 Motivation of an adapted evaluation procedure 32g34.3.3.2.2 Objective evaluation procedure for prototyping the GSM Handsfree AEC algorithms 33g34.3.3.2.3 Proposed Objective-Subjective Evaluation procedure. 35g34.3.3.2.4 Derived Evaluation schemes for Handsfree mobile telepho
25、nes . 35g34.3.4 Subjective tests . 38g34.3.4.1 Subjective opinion tests . 38g34.3.4.1.1 Listening opinion tests . 38g34.3.4.1.2 Conversation Opinion Tests 38g34.3.4.1.3 Proposed test method . 38g34.3.4.2 Subjective tests extracted from “Ultimate test set“ . 39g3Annex A: Subjective Tests from UTS . 4
26、1g3ETSI ETSI TR 143 058 V15.0.0 (2018-07)43GPP TR 43.058 version 15.0.0 Release 15Annex B: Bibliography 45g3B.1 References of TD presented in SMG2/ad hoc 03.50 meetings. 45g3B.2 References from subclause 4.1 . 45g3B.3 References from subclause 4.2.1 46g3B.4 References from subclause 4.3.1 46g3B.5 Re
27、ferences from subclause 4.3.3 46g3Annex C (informative): Change history . 47g3History 48g3ETSI ETSI TR 143 058 V15.0.0 (2018-07)53GPP TR 43.058 version 15.0.0 Release 15Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present docum
28、ent are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where:
29、x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incr
30、emented when editorial only changes have been incorporated in the document. ETSI ETSI TR 143 058 V15.0.0 (2018-07)63GPP TR 43.058 version 15.0.0 Release 151 Scope The present document gives some guidelines to implement test methods and to evaluate the transmission quality of handsfree Mobile Station
31、s (MSs). The normative characteristics and test methods for handsfree Mobile Stations (MSs are defined in GSM 03.50). The present document gives additional data. It includes summaries of texts or contributions presented and discussed during the meetings of ad hoc group SMG2/03.50 on environmental co
32、nditions, speech processing and quality assessment for handsfree Mobile Station. The items covered by this report are mainly. - Environmental conditions for handsfree Mobile Stations. - Speech processing techniques and consequences on delay. - Speech quality assessment for handsfree implementing aco
33、ustic echo cancellation and noise reduction. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-s
34、pecific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Rele
35、ase as the present document. 1 I-ETS 300 245-3: “Integrated Services Digital Network (ISDN);Technical characteristics of telephony terminals; Part 3: Pulse Code Modulation (PCM) A-law“. 2 ITU-T Recommendation G.113: “Transmission Impairments Quantisation Distortion“. 3 ITU-T Recommendation G.114: “T
36、ransmission Impairments, Delay“. 4 ITU-T Recommendation G.165: “Performances of Network Echo Cancellers“. 5 ITU-T Recommendation G.167: “Performance of acoustic echo control devices“. 6 ITU-T Recommendation G.711: “64 kbit/s Pulse Code Modulation (PCM)“. 7 ITU-T Recommendation G.721: “32 kbit/s Adap
37、tive Differential Pulse Code Modulation (ADPCM)“. 8 ITU-T Recommendation G.728: “16 kbit/s Low Delay CELP“. 9 ITU-T Recommendation G.729: “8 kbit/s ACELP“. 10 ITU-T Recommendation G.731: “Echo“. 11 ITU-T Recommendation P.50: “Artificial Voices“. 12 ITU-T Recommendation P.58: “Head and Torso Simulato
38、r (HATS) for telephonometry“. 13 ITU-T Recommendation P.340: “Transmission Characteristics of Handsfree Telephones“. 14 ITU-T Handbook On Telephonometry, Geneva 1987. 15 GSM 03.50: “Digital cellular telecommunications system (Phase 2+); Transmission planning aspects of the speech service in the GSM
39、Public Land Mobile Network (PLMN) system“. ETSI ETSI TR 143 058 V15.0.0 (2018-07)73GPP TR 43.058 version 15.0.0 Release 153 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: Terminal Coupling Loss (TCL): frequency depen
40、dent coupling loss between the receiving port and sending port of a terminal due to: - acoustical coupling at the user interface; - electrical coupling due to crosstalk in the handset cord or within the electrical circuits; - seismic coupling through the mechanical parts of the terminal. NOTE 1: The
41、 receiving port and the sending port of a digital voice terminal is a 0 dBr point. NOTE 2: The coupling at the user interface depends on the conditions of use. Weighted Terminal Coupling Loss (TCLW): weighted Terminal Coupling Loss using the weighting of CCITT Recommendation G.122. 3.2 Abbreviations
42、 For the purposes of the present document, the following abbreviations apply: HATS Head and Torso Simulator MRP Mouth Reference PointRLR Receive Loudness Rating SLR Send Loudness Rating TCL Terminal Coupling LossTCLw Weighted Terminal Coupling Loss 4 Characteristics, test methods and quality assessm
43、ent 4.1 Environmental conditions for a car type handsfree Mobile Station 4.1.1 Data available on real use environment 4.1.1.1 Reverberation and echo a) From Background acoustic noise reduction in mobile telephony (see subclause B.2 reference 1). The reverberation times determined from the impulse re
44、sponse inside the cabin are in the order of 25 ms. b) From Speech enhancement for mobile telephony (see subclause B.2 reference 2). The reverberation time, determined from the impulse response, is around 30ms (it is assumed that the long impulse of the source - a small loudspeaker - may explain why
45、this result is greater that value determined by, reference 1 of subclause B.2. c) From Contribution lamlioration des performances dun radiotelephone mains-libres commande vocale (see subclause B.2 reference 3). The reverberance, in this report, is not defined directly by the reverberation time, but
46、by the part of impulse response energy (from0 to t), relative to total energy, as a time function. ETSI ETSI TR 143 058 V15.0.0 (2018-07)83GPP TR 43.058 version 15.0.0 Release 15Table 1 Time (ms) Loss (dB). R25 Loss (dB). 505 10 10.2 9.220 22.5 20.230 32.5 30.54.1.1.2 Sources and types of noise. Lev
47、el and Spectra of the noise 4.1.1.2.1 Noise due to engine, tyres and moving situations a) From Acoustic noise analysis and speech enhancement for mobile radio applications (see subclause B.2 reference 4). - Test conditions. - Car: Alfa Romeo Alfetta 200J. - Supercardioid directional microphones. - M
48、icrophone positions: 3 Measurement positions (Front seats, driver and passenger head positions. Middle of rear seat, passenger head position). In these 3 positions, the signals are almost the same. - Signal analysis: DFT analysis. Table 2 Testing conditions Vehicle speed (km/h) Engine rate (r.p.m.)
49、Road pavement a 0 4000 asphaltb 100 0 asphalt - Noise - in testing condition “ a “: a very high peak of energy appears around 120 Hz, at the fundamental frequency of the four strokes four cylinders engine noise. The noise power spectrum decreases hardly between this frequency and 3 kHz. - in testing condition “ b “: (gear in neutral position, engine kept off), the peak of power in low frequency region disappears and the noise power between 1 kHz and 6 kHz increases considerably relative to condition “ a “. b) From Background
