On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2014
|
| Schriftenreihe: | Forschungsberichte aus dem Arbeitsbereich Nachrichtentechnik der Universität Bremen
26 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis Inhaltsverzeichnis |
| Beschreibung: | 279 S. Ill., graph. Darst. 210 mm x 148 mm, 431 g |
| ISBN: | 9783844027778 |
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Datensatz im Suchindex
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|---|---|
| adam_text | CONTENTS
PREFACE III
1 INTRODUCTION 1
1.1 OVERVIEW 1
1.2 FOCUS, OUTLINE AND MAIN CONTRIBUTIONS 5
1.3 NOTATION 6
2 BASICS 9
2.1 FUNDAMENTALS OF ROOM ACOUSTICS 9
2.1.1 ROOM IMPULSE RESPONSES 9
2.1.2 TIME- AND FREQUENCY-DOMAIN PROPERTIES OF RIRS . . . 11
2.1.3 STOCHASTIC RIR MODELLING 13
2.1.4 ROOM REVERBERATION TIME AND ENERGY DECAY CURVE . 14
2.1.5 CRITICAL DISTANCE 15
2.1.6 Z-DOMAIN PROPERTIES OF ROOM IMPULSE RESPONSES . . . 17
2.2 MULTI-DELAY FILTERING 18
2.3 CHAPTER SUMMARY 26
3 ACOUSTIC ECHO CANCELLATION 27
3.1 OBJECTIVE QUALITY MEASURES FOR AEC ALGORITHMS 33
3.1.1 AEC SYSTEM MISALIGNMENT 34
3.1.2 ECHO RETURN LOSS ENHANCEMENT (ERLE) 35
3.2 GRADIENT ALGORITHMS FOR SYSTEM IDENTIFICATION 36
3.2.1 THE LMS AND NLMS ALGORITHM 38
3.2.2 PROPORTIONATE FILTER UPDATE 39
3.3 POST-FILTERS FOR RESIDUAL ECHO SUPPRESSION 50
3.4 CHAPTER SUMMARY 59
HTTP://D-NB.INFO/1050256964
VI
TABLE OF CONTENTS
4 DEREVERBERATION BY LISTENING-ROOM COMPENSATION 61
4.1 LITERATURE SURVEY ON SPEECH DEREVERBERATION 64
4.1.1 INVERSE FILTERING 64
4.1.2 MULTI-CHANNEL INVERSE FILTERING 65
4.1.3 EQUALIZATION 66
4.1.4 DEREVERBERATION BY MEANS OF SPATIAL FILTERING 67
4.1.5 BLIND DEREVERBERATION APPROACHES 68
4.1.6 COMBINED APPROACHES 68
4.2 ASSESSMENT OF QUALITY FOR LRC 69
4.2.1 SUBJECTIVE LISTENING TESTS 72
4.2.2 CORRELATION ANALYSIS 76
4.3 LISTENING-ROOM COMPENSATION 83
4.4 LEAST-SQUARES EQUALIZATION 84
4.4.1 SINGLE CHANNEL LS-EQUALIZER 85
4.4.2 ROBUSTNESS ISSUES 93
4.4.3 MIMO LS-EQUALIZER 96
4.5 GRADIENT ALGORITHMS FOR LISTENING-ROOM COMPENSATION . . . 104
4.5.1 THE FILTERED-X LMS 105
4.5.2 THE MODIFIED FILTERED-X LMS 107
4.5.3 THE DECOUPLED FILTERED-X LMS 108
4.5.4 SIMULATION RESULTS 115
4.6 WEIGHTED LEAST-SQUARES EQUALIZATION 118
4.7 ROOM IMPULSE RESPONSE SHAPING 121
4.7.1 SPECTRAL POST PROCESSING 123
4.7.2 JOINT TIME-FREQUENCY PROCESSING 125
4.8 RATING OF THE SOUND SAMPLES 126
4.9 CHAPTER SUMMARY 130
5 COMBINATIONS OF SYSTEMS FOR AEC AND LRC 131
5.1 SYSTEM IDENTIFICATION BY AEC FILTERS 132
5.1.1 LRC PERFORMANCE IN DEPENDENCE OF THE AEC 133
5.1.2 INCREASING LRC ROBUSTNESS BASED ON THE AEC .... 136
*5.1.3 POST FILTER FOR SYSTEM IDENTIFICATION 141
5.2 AEC PERFORMANCE IN DEPENDENCE OF LRC SYSTEM 143
*5.2.1 PERFORMANCE OF INNER AEC IN DEPENDENCE OF EQUALIZER 143
5.2.2 PERFORMANCE OF PROPORTIONATE UPDATE SCHEMES .... 145
5.3 COMBINED SYSTEM (LRC FILTER, INNER AND OUTER AEC) .... 150
*5.4 CHAPTER SUMMARY 154
TABLE OF CONTENTS
VII
6 SUMMARY AND POSSIBLE FUTURE WORK 155
6.1 SUMMARY 155
6.2 POSSIBLE FUTURE WORK 157
APPENDIX 159
A OBJECTIVE QUALITY MEASURES FOR LRC 161
A.L CHANNEL-BASED MEASURES 161
A. 1.1 DEFINITION 162
A.1.2 CLARITY 163
A.1.3 CENTRAL TIME (CT) 164
A. 1.4 DIRECT-TO-REVERBERATION-RATIO (DRR) 165
A.1.5 SPECTRAL VARIANCE 165
A.1.6 SPECTRAL FLATNESS MEASURE (SFM) 167
A.2 SIGNAL-BASED QUALITY MEASURES 168
A.2.1 SEGMENTAL SIGNAL-TO-REVERBERATION RATIO (SSRR) . . .168
A.2.2 FREQUENCY-WEIGHTED SSRR (FWSSRR) 169
A.2.3 WEIGHTED SPECTRAL SLOPE (WSS) 170
A.2.4 LOG-SPECTRAL DISTORTION (LSD) 170
A.2.5 LPC-BASED QUALITY MEASURES 171
A.2.6 PSYCHOACOUSTICALLY MOTIVATED QUALITY MEASURES .... 172
B DETAILS OF SUBJECTIVE LISTENING TESTS 193
C CORRELATIONS OF OBJECTIVE AND SUBJECTIVE DATA 207
D MATHEMATICAL PROOFS AND DETAILS 219
D.L PROOF OF G
H
G
= G 219
D.2 PROOF OF G E
AE
CM =
AEC
[^]
AND G
H
Y[]
= Y[] 220
SYMBOLS AND ABBREVIATIONS 221
LITERATURE 234
INDEX 277
|
| any_adam_object | 1 |
| author | Götze, Stefan |
| author_facet | Götze, Stefan |
| author_role | aut |
| author_sort | Götze, Stefan |
| author_variant | s g sg |
| building | Verbundindex |
| bvnumber | BV042235441 |
| classification_rvk | ZN 6070 |
| ctrlnum | (OCoLC)878980571 (DE-599)DNB1050256964 |
| dewey-full | 621.38284 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.38284 |
| dewey-search | 621.38284 |
| dewey-sort | 3621.38284 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
| format | Thesis Book |
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| id | DE-604.BV042235441 |
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| indexdate | 2024-07-10T01:16:01Z |
| institution | BVB |
| isbn | 9783844027778 |
| language | English |
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| physical | 279 S. Ill., graph. Darst. 210 mm x 148 mm, 431 g |
| publishDate | 2014 |
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| series2 | Forschungsberichte aus dem Arbeitsbereich Nachrichtentechnik der Universität Bremen |
| spelling | Götze, Stefan Verfasser aut On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems Stefan Goetze Aachen Shaker 2014 279 S. Ill., graph. Darst. 210 mm x 148 mm, 431 g txt rdacontent n rdamedia nc rdacarrier Forschungsberichte aus dem Arbeitsbereich Nachrichtentechnik der Universität Bremen 26 Zugl.: Bremen, Univ., Diss., 2013 Nachhall (DE-588)4171018-6 gnd rswk-swf Adaptives Filter (DE-588)4141377-5 gnd rswk-swf Freisprecheinrichtung (DE-588)4240971-8 gnd rswk-swf Telekonferenz (DE-588)4195321-6 gnd rswk-swf Akustische Signalverarbeitung (DE-588)4283234-2 gnd rswk-swf Echokompensation (DE-588)4504012-6 gnd rswk-swf Sprachübertragung (DE-588)4129249-2 gnd rswk-swf Übertragungsqualität (DE-588)4394621-5 gnd rswk-swf Impulsantwort (DE-588)4383898-4 gnd rswk-swf Raumakustik (DE-588)4048567-5 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Telekonferenz (DE-588)4195321-6 s Freisprecheinrichtung (DE-588)4240971-8 s Raumakustik (DE-588)4048567-5 s Nachhall (DE-588)4171018-6 s Echokompensation (DE-588)4504012-6 s Akustische Signalverarbeitung (DE-588)4283234-2 s Impulsantwort (DE-588)4383898-4 s Adaptives Filter (DE-588)4141377-5 s Sprachübertragung (DE-588)4129249-2 s Übertragungsqualität (DE-588)4394621-5 s DE-604 Forschungsberichte aus dem Arbeitsbereich Nachrichtentechnik der Universität Bremen 26 (DE-604)BV012847543 26 DE-101 pdf/application http://d-nb.info/1050256964/04 Inhaltsverzeichnis DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027673676&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Götze, Stefan On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems Forschungsberichte aus dem Arbeitsbereich Nachrichtentechnik der Universität Bremen Nachhall (DE-588)4171018-6 gnd Adaptives Filter (DE-588)4141377-5 gnd Freisprecheinrichtung (DE-588)4240971-8 gnd Telekonferenz (DE-588)4195321-6 gnd Akustische Signalverarbeitung (DE-588)4283234-2 gnd Echokompensation (DE-588)4504012-6 gnd Sprachübertragung (DE-588)4129249-2 gnd Übertragungsqualität (DE-588)4394621-5 gnd Impulsantwort (DE-588)4383898-4 gnd Raumakustik (DE-588)4048567-5 gnd |
| subject_GND | (DE-588)4171018-6 (DE-588)4141377-5 (DE-588)4240971-8 (DE-588)4195321-6 (DE-588)4283234-2 (DE-588)4504012-6 (DE-588)4129249-2 (DE-588)4394621-5 (DE-588)4383898-4 (DE-588)4048567-5 (DE-588)4113937-9 |
| title | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems |
| title_auth | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems |
| title_exact_search | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems |
| title_full | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems Stefan Goetze |
| title_fullStr | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems Stefan Goetze |
| title_full_unstemmed | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems Stefan Goetze |
| title_short | On the combination of systems for listening-room compensation and acoustic echo cancellation in hands-free teleconference systems |
| title_sort | on the combination of systems for listening room compensation and acoustic echo cancellation in hands free teleconference systems |
| topic | Nachhall (DE-588)4171018-6 gnd Adaptives Filter (DE-588)4141377-5 gnd Freisprecheinrichtung (DE-588)4240971-8 gnd Telekonferenz (DE-588)4195321-6 gnd Akustische Signalverarbeitung (DE-588)4283234-2 gnd Echokompensation (DE-588)4504012-6 gnd Sprachübertragung (DE-588)4129249-2 gnd Übertragungsqualität (DE-588)4394621-5 gnd Impulsantwort (DE-588)4383898-4 gnd Raumakustik (DE-588)4048567-5 gnd |
| topic_facet | Nachhall Adaptives Filter Freisprecheinrichtung Telekonferenz Akustische Signalverarbeitung Echokompensation Sprachübertragung Übertragungsqualität Impulsantwort Raumakustik Hochschulschrift |
| url | http://d-nb.info/1050256964/04 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027673676&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV012847543 |
| work_keys_str_mv | AT gotzestefan onthecombinationofsystemsforlisteningroomcompensationandacousticechocancellationinhandsfreeteleconferencesystems |
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