1、 ETSI EG 202 396-3 V1.7.1 (2018-03) Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission - Objective test methods ETSI GUIDE ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 2 Reference REG/STQ-270 Keywords noi
2、se, QoS, quality, 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 c
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7、ithout the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2018. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTETMare trademarks of
8、ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 3 Contents Intellectual Property Ri
9、ghts 5g3Foreword . 5g3Modal verbs terminology 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 6g33 Symbols and abbreviations . 8g33.1 Symbols 8g33.2 Abbreviations . 8g34 Speech signals to be used . 9g35 Selection of the data within the scope of the wideband obj
10、ective model: Experts evaluation . 10g35.1 Selection process 10g35.2 Results 10g35.3 French database 11g36 Description of the wideband objective test method . 11g36.1 Introduction 11g36.2 Speech sample preparation and nomenclature 12g36.2.1 Speech sample preparation . 12g36.2.2 Nomenclature 15g36.3
11、Additional Training data 16g36.4 Principles of Relative Approach and Relative Approach 16g36.5 Objective N-MOS. 19g36.5.1 Introduction. 19g36.5.2 Description of N-MOS algorithm . 20g36.5.3 Comparing subjective and objective N-MOS results 23g36.6 Objective S-MOS . 24g36.6.1 Introduction. 24g36.6.2 De
12、scription of S-MOS Algorithm . 25g36.6.3 Comparing Subjective and Objective S-MOS Results 28g36.7 Objective G-MOS. 29g36.7.1 Description of G-MOS Algorithm 29g36.7.2 Comparing subjective and objective G-MOS results 30g37 Validation of the Wideband Objective Test Method 31g37.1 Introduction 31g37.2 E
13、TSI EG 202 396-2 Database Results Analysis . 33g37.2.1 Comparing subjective and objective N-MOS results 33g37.2.2 Comparing subjective and objective S-MOS results 33g37.2.3 Comparing Subjective and Objective G-MOS Results . 34g37.3 Orange Validation Database results Analysed . 35g37.3.0 Introduction
14、. 35g37.3.1 Comparing subjective and objective N-MOS results 35g37.3.2 Comparing subjective and objective S-MOS results 35g37.3.3 Comparing Subjective and Objective G-MOS Results . 36g38 Objective Model for Narrowband Applications . 37g38.0 Introduction 37g38.1 File pre-processing . 37g38.2 Adaptati
15、on of the Calculations . 38g38.3 Prediction results 38g3Annex A: Detailed post evaluation of listening test results 40g3ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 4 Annex B: Results of PESQ and TOSQA2001 - Analysis of ETSI EG 202 396-2 database 43g3Annex C: Comparison of objective MOS versus auditory M
16、OS for the complete STF 294 database . 50g3Annex D: Comparison of objective MOS versus auditory MOS for rejected conditions 52g3Annex E: Void 54g3Annex F: Detailed STF 294 subjective and objective validation test results 55g3Annex G: Void 58g3Annex H: Extension of the Speech Quality Test Method to N
17、arrowband: Adaptation, Training and Validation . 59g3Annex I: Void 61g3Annex J: Summary of Czech samples not used for model training 62g3J.0 Introduction 62g3J.1 Selection process - Czech database 62g3J.2 General differences between the databases 64g3J.3 Comparison of the objective method results fo
18、r Czech and French samples . 67g3J.4 Czech conditions results analysis . 72g3J.4.1 Comparing subjective and objective N-MOS results . 72g3J.4.2 Comparing subjective and objective S-MOS results 72g3J.4.3 Comparing Subjective and Objective G-MOS Results. 73g3J.5 Language Dependent Robustness of G-MOS.
19、 74g3J.6 Regression Coefficients for Czech data . 75g3J.7 Post selection 76g3Annex K: Relative Approach Non-Linear Transformation . 80g3Annex L: Bibliography 81g3History 82g3ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 5 Intellectual Property Rights Essential patents IPRs essential or potentially essenti
20、al to normative deliverables 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 Rights (IPRs); Essential, or potentially Essential, IPRs notifi
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22、 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 tradenames which are asserted and/or registered by their owners
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24、izations associated with those trademarks. Foreword This ETSI Guide (EG) has been produced by ETSI Technical Committee Speech and multimedia Transmission Quality (STQ). The present document is a deliverable of ETSI Specialized Task Force (STF) 294 entitled: “Improving the quality of eEurope wideband
25、 speech applications by developing a performance testing and evaluation methodology for background noise transmission“. The present document is part 3 of a multi-part deliverable covering Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise
26、, as identified below: Part 1: “Background noise simulation technique and background noise database“; Part 2: “Background noise transmission - Network simulation - Subjective test database and results“; Part 3: “Background noise transmission - Objective test methods“. Modal verbs terminology In the
27、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 expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used
28、in direct citation. ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 6 1 Scope The present document aims to identify and define testing methodologies which can be used to objectively evaluate the performance of narrowband and wideband terminals and systems for speech communication in the presence of backgrou
29、nd noise. Background noise is a problem in mostly all situations and conditions and need to be taken into account in both, terminals and networks. The present document provides information about the testing methods applicable to objectively evaluate the speech quality in the presence of background n
30、oise. The present document includes: The description of the experts post evaluation process chosen to select the subjective test data being within the scope of the objective methods. The results of the performance evaluation of the currently existing methods described in Recommendations ITU-T P.862
31、i.16 and P.862.1 i.17 and in TOSQA2001 i.19 which is chosen for the evaluation of terminals in the framework of ETSI VoIP speech quality test events i.8, i.9, i.10 and i.11. The method which is applicable to objectively determine the different parameters influencing the speech quality in the presenc
32、e of background noise taking into account: - the speech quality; - the background noise transmission quality; - the overall quality. The present document is to be used in conjunction with: - ETSI ES 202 396-1 i.1 which describes a recording and reproduction setup for realistic simulation of backgrou
33、nd noise scenarios in lab-type environments for the performance evaluation of terminals and communication systems. - ETSI EG 202 396-2 i.2 which describes the simulation of network impairments and how to simulate realistic transmission network scenarios and which contains the methodology and results
34、 of the subjective scoring for the data forming the basis of the present document. - French speech sentences as defined in Recommendation ITU-T P.501 i.13 for wideband and English speech sentences as defined in Recommendation ITU-T P.501 i.13 for narrowband. 2 References 2.1 Normative references Nor
35、mative references are not applicable in the present document. 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-specific references, t
36、he latest version of the referenced 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 application of the p
37、resent document but they assist the user with regard to a particular subject area. i.1 ETSI ES 202 396-1: “Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database“. E
38、TSI ETSI EG 202 396-3 V1.7.1 (2018-03) 7 i.2 ETSI EG 202 396-2: “Speech Processing, Transmission and Quality Aspects (STQ); Speech Quality performance in the presence of background noise; Part 2: Background Noise Transmission - Network Simulation - Subjective Test Database and Results“. i.3 Recommen
39、dation ITU-T P.835: “Subjective test methodology for evaluating speech communication systems that include noise suppression algorithm“. i.4 Recommendation ITU-T P.800: “Methods for subjective determination of transmission quality“. i.5 Recommendation ITU-T P.831: “Subjective performance evaluation o
40、f network echo cancellers“. i.6 Genuit, K.: “Objective Evaluation of Acoustic Quality Based on a Relative Approach“, InterNoise 96, Liverpool, UK. i.7 Recommendation ITU-T SG 12 Contribution 34: “Evaluation of the quality of background noise transmission using the “Relative Approach“. i.8 ETSI 2nd S
41、peech Quality Test Event: “Anonymized Test Report“, ETSI Plugtests, HEAD acoustics, T-Systems Nova. NOTE: Available at http:/www.etsi.org/WebSite/OurServices/Plugtests/History.aspx. Also available as ETSI TR 102 648-3. i.9 ETSI 3rd Speech Quality Test Event: “Anonymized Test Report “IP Gateways“. NO
42、TE: Available at http:/www.etsi.org/WebSite/OurServices/Plugtests/History.aspx. i.10 ETSI 3rd Speech Quality Test Event: “Anonymized Test Report “IP Phones“. i.11 ETSI 4th Speech Quality Test Event: “Anonymized Test Report “IP Gateways and IP Phones“. NOTE: Available at http:/www.etsi.org/WebSite/Ou
43、rServices/Plugtests/History.aspx. i.12 F. Kettler, H.W. Gierlich, F. Rosenberger: “Application of the Relative Approach to Optimize Packet Loss Concealment Implementations“, DAGA, March 2003, Aachen, Germany. i.13 Recommendation ITU-T P.501: “Test Signals for Use in Telephonometry“. i.14 R. Sottek,
44、K. Genuit: “Models of Signal Processing in human hearing“, International Journal of Electronics and Communications (AE) volume 59, 2005, p. 157-165. NOTE: Available at http:/www.elsevier.de/aeue. i.15 SAE International - Document 2005-01-2513: “Tools and Methods for Product Sound Design of Vehicles“
45、 R. Sottek, W. Krebber, G. Stanley. i.16 Recommendation ITU-T P.862: “Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrowband telephone networks and speech codecs“. i.17 Recommendation ITU-T P.862.1: “Mapping function for transformin
46、g P.862 raw result scores to MOS-LQO“. i.18 Recommendation ITU-T P.862.2: “Wideband extension to Recommendation P.862 for the assessment of wideband telephone networks and speech codecs“. i.19 Recommendation ITU-T SG 12 Contribution 19: “Results of objective speech quality assessment of wideband spe
47、ech using the Advanced TOSQA2001“. i.20 Recommendation ITU-T G.722: “7 kHz audio-coding within 64 kbit/s“. i.21 Recommendation ITU-T G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. i.22 Recommendation ITU-T P.56: “Objective measurement of active
48、speech level“. i.23 Recommendation ITU-T P.57: “Artificial ears“. ETSI ETSI EG 202 396-3 V1.7.1 (2018-03) 8 i.24 M. Spiegel: “Theory and problems of statistics“, McGraw Hill, 1998. i.25 Void. i.26 M. Kendall: “Rank correlation methods“, Charles Griffin Speech quality performance in the presence of b
49、ackground noise: Background noise transmission for mobile terminals-objective test methods“. i.33 Hastie T.; Tibshirani R. and Friedman J.: “The Elements of Statistical Learning: Data Mining, Inference, and Prediction“, New York: Springer-Verlag, 2001. i.34 ETSI EG 202 396-3 (V1.1.1 to V1.3.1): “Speech Processing, Transmission and Quality Aspects (STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission - Objective test methods“. 3 Sy
