1、 ETSI TR 1Digital cellular telecoCharacterisation, tesfor handsfr(3GPP TR 43.0TECHNICAL REPORT 143 058 V13.0.0 (2016communications system (Phatest methods and quality assesfree Mobile Stations (MSs) .058 version 13.0.0 Release 13GLOBAL SYSTEMOBILE COMMUN16-01) hase 2+); sessment 13) TEM FOR ICATIONS
2、RETSI ETSI TR 143 058 V13.0.0 (2016-01)13GPP TR 43.058 version 13.0.0 Release 13Reference RTR/TSGS-0443058vd00 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 luc
3、ratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can 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
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12、he present document. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership 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 ref
13、erences to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will n
14、ot“, “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 citation. ETSI ETSI TR 143 058 V13.0.0 (2016-01)33GPP TR 43.058 v
15、ersion 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 Characteristics, test methods and quality assessment . 7g34.1 Environmen
16、tal conditions for a car type handsfree Mobile Station . 7g34.1.1 Data available on real use environment 7g34.1.1.1 Reverberation 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
17、 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 Environment 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 veh
18、icle simulator for handsfree testing 17g34.1.2.3 Advisory text for installation of handsfree MS in a vehicle environment . 18g34.1.2.4 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
19、 handsfree telephone - Influence of the environment and the test conditions on frequency responses and loudness ratings . 19g34.2 Delay in handsfree terminals implemented with signal processing techniques 22g34.2.1 Signal processing techniques for acoustic echo cancelling and noise reduction . 22g34
20、.2.2 Examples of delays due to signal processing techniques 22g34.2.2.1 Data produced by Matra Communication . 22g34.2.2.2 Data 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 Assessmen
21、t Criteria for Handsfree processing used in GSM mobile environment . 27g34.3.3 Evaluation Methodology for Full-Duplex Acoustic Echo 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
22、.3.3.1.2 Test Signals used from the FREETEL-Esprit Database 32g34.3.3.2 Adapted objective evaluation procedure to a GSM Handsfree mobile . 33g34.3.3.2.1 Motivation of an adapted evaluation procedure 33g34.3.3.2.2 Objective evaluation procedure for prototyping the GSM Handsfree AEC algorithms 33g34.3
23、.3.2.3 Proposed Objective-Subjective Evaluation procedure. 35g34.3.3.2.4 Derived Evaluation schemes for Handsfree mobile telephones . 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 Pro
24、posed test method . 38g34.3.4.2 Subjective tests extracted from “Ultimate test set“ . 39g3ETSI ETSI TR 143 058 V13.0.0 (2016-01)43GPP TR 43.058 version 13.0.0 Release 13Annex A: Subjective Tests from UTS . 41g3Annex B: Bibliography 45g3B.1 References of TD presented in SMG2/ad hoc 03.50 meetings. 45
25、g3B.2 References from subclause 4.1 . 45g3B.3 References from subclause 4.2.1 46g3B.4 References from subclause 4.3.1 46g3B.5 References from subclause 4.3.3 46g3Annex C (informative): Change history . 47g3History 48g3ETSI ETSI TR 143 058 V13.0.0 (2016-01)53GPP TR 43.058 version 13.0.0 Release 13For
26、eword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document 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-re
27、leased by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: 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 digi
28、t is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 143 058 V13.0.0 (2016-01)63GPP TR 43.058 version 13.0.0 Release 131 Scope The prese
29、nt document gives some guidelines to implement test methods and to evaluate the transmission quality of handsfree Mobile Stations (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 include
30、s summaries of texts or contributions presented and discussed during the meetings of ad hoc group SMG2/03.50 on environmental conditions, speech processing and quality assessment for handsfree Mobile Station. The items covered by this report are mainly. - Environmental conditions for handsfree Mobil
31、e Stations. - Speech processing techniques and consequences on delay. - Speech quality assessment for handsfree implementing acoustic echo cancellation and noise reduction. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the pre
32、sent document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. 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 documen
33、t (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release 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
34、(PCM) A-law“. 2 ITU-T Recommendation G.113: “Transmission Impairments Quantisation Distortion“. 3 ITU-T Recommendation G.114: “Transmission Impairments, Delay“. 4 ITU-T Recommendation G.165: “Performances of Network Echo Cancellers“. 5 ITU-T Recommendation G.167: “Performance of acoustic echo contro
35、l devices“. 6 ITU-T Recommendation G.711: “64 kbit/s Pulse Code Modulation (PCM)“. 7 ITU-T Recommendation G.721: “32 kbit/s Adaptive 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 Recomme
36、ndation G.731: “Echo“. 11 ITU-T Recommendation P.50: “Artificial Voices“. 12 ITU-T Recommendation P.58: “Head and Torso Simulator (HATS) for telephonometry“. 13 ITU-T Recommendation P.340: “Transmission Characteristics of Handsfree Telephones“. 14 ITU-T Handbook On Telephonometry, Geneva 1987. 15 GS
37、M 03.50: “Digital cellular telecommunications system (Phase 2+); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system“. ETSI ETSI TR 143 058 V13.0.0 (2016-01)73GPP TR 43.058 version 13.0.0 Release 133 Definitions and abbreviations 3.1 Definitions Fo
38、r the purposes of the present document, the following terms and definitions apply: Terminal Coupling Loss (TCL): frequency dependent 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
39、the handset cord or within the electrical circuits; - seismic coupling through the mechanical parts of the terminal. NOTE 1: The 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 Ter
40、minal Coupling Loss (TCLW): weighted Terminal Coupling Loss using the weighting of CCITT Recommendation G.122. 3.2 Abbreviations 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 Lo
41、udness Rating TCL Terminal Coupling LossTCLw Weighted Terminal Coupling Loss 4 Characteristics, test methods and quality assessment 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 acou
42、stic noise reduction in mobile telephony (see subclause B.2 reference 1). The reverberation times determined from the impulse response 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
43、the impulse response, is around 30ms (it is assumed that the long impulse of the source - a small loudspeaker - may explain why 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 v
44、ocale (see subclause B.2 reference 3). The reverberance, in this report, is not defined directly by the reverberation time, but by the part of impulse response energy (from0 to t), relative to total energy, as a time function. ETSI ETSI TR 143 058 V13.0.0 (2016-01)83GPP TR 43.058 version 13.0.0 Rele
45、ase 13Table 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. Level 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
46、(see subclause B.2 reference 4). - Test conditions. - Car: Alfa Romeo Alfetta 200J. - Supercardioid directional microphones. - Microphone positions: 3 Measurement positions (Front seats, driver and passenger head positions. Middle of rear seat, passenger head position). In these 3 positions, the sig
47、nals are almost the same. - Signal analysis: DFT analysis. Table 2 Testing conditions Vehicle speed (km/h) Engine rate (r.p.m.) 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 fo
48、ur 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 co
49、nsiderably relative to condition “ a “. b) From Background acoustic noise reduction in mobile telephony (see subclause B.2 reference 1) - Test conditions. Measurements were made in a typical mid-size North American car. - Noise spectrum. see figure 1. ETSI ETSI TR 143 058 V13.0.0 (2016-01)93GPP TR 43.058 version 13.0.0 Release 13Figure 1: Noise spectrum The noise power spectrum inside the cabin is mainly located in very low frequencies (below 250 Hz). Comparing the noise outside and inside the cabin, it appears that the c
