Enhancement of audio signals by combined acoustic echo cancellation and noise reduction:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Mainz
1999
|
| Ausgabe: | 1. Aufl. |
| Schriftenreihe: | Aachener Beiträge zu digitalen Nachrichtensystemen
11 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zugl.: Aachen, Techn. Hochsch., Diss., 1999 |
| Beschreibung: | X, 142 S. graph. Darst. : 21 cm |
| ISBN: | 3860738305 |
Internformat
MARC
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| 100 | 1 | |a Gustafsson, Nils Anders Stefan |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Enhancement of audio signals by combined acoustic echo cancellation and noise reduction |c vorgel. von Nils Anders Stefan Gustafsson |
| 250 | |a 1. Aufl. | ||
| 264 | 1 | |a Aachen |b Mainz |c 1999 | |
| 300 | |a X, 142 S. |b graph. Darst. : 21 cm | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Aachener Beiträge zu digitalen Nachrichtensystemen |v 11 | |
| 500 | |a Zugl.: Aachen, Techn. Hochsch., Diss., 1999 | ||
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Datensatz im Suchindex
| _version_ | 1807772988697739264 |
|---|---|
| adam_text |
CONTENTS
1
INTRODUCTION
1
2
ACOUSTIC
ECHO
CANCELLATION
5
2.1
OVERVIEW
.
5
2.2
ECHO
CANCELLATION
BY
SYSTEM
IDENTIFICATION
.
7
2.2.1
THE
MODEL
.
7
2.2.2
THE
NLMS
ALGORITHM
.
8
2.3
CONCLUSION
.
11
3
NOISE
REDUCTION
13
3.1
OVERVIEW
.
13
3.2
THE
PRINCIPLES
OF
SPECTRAL
WEIGHTING
.
15
3.2.1
MODEL
ASSUMPTIONS
.
15
3.2.2
FREQUENCY
DOMAIN
REPRESENTATION
.
16
3.2.3
PROBLEM
FORMULATION
.
19
3.2.4
POWER
SPECTRAL
DENSITY
AND
ESTIMATION
PROCEDURES
.
.
21
3.2.5
ANALYSIS/SYNTHESIS
SYSTEM
.
22
3.3
WEIGHTING
RULES
.
24
3.3.1
SPECTRAL
SUBTRACTION
.
25
3.3.2
THE
WIENER
RULE
.
27
3.3.3
THE
WEIGHTING
RULES
OF
EPHRAIM
AND
MALAH
.
30
3.3.4
LIMITING
OF
SNR
ESTIMATES
.
33
3.4
CONCLUSION
.
33
4
PSYCHOACOUSTICALLY
MOTIVATED
NOISE
REDUCTION
35
4.1
OVERVIEW
.
35
4.2
PSYCHOPHYSICAL
ASPECTS
OF
THE
AUDITORY
SYSTEM
.
36
4.2.1
THE
HUMAN
EAR
.
37
4.2.2
AUDITORY
MASKING
.
38
4.2.3
PROCEDURE
FOR
ESTIMATING
THE
MASKED
THRESHOLD
.
41
VIII
CONTENTS
4.3
A
NOVEL
PSYCHOACOUSTICALLY
MOTIVATED
WEIGHTING
RULE
.
42
4.3.1
DEFINITION
OF
SPEECH
AND
NOISE
DISTORTION
.
43
4.3.2
DESIGN
OBJECTIVE:
MASK
THE
NOISE
DISTORTION
.
44
4.3.3
DISCUSSION
OF
H
IND
.
47
4.4
EVALUATION
.
53
4.4.1
INSTRUMENTAL
EVALUATIONS
.
53
4.4.2
COMMENTS
ON
THE
INSTRUMENTAL
MEASURES
.
55
4.4.3
AUDITIVE
EVALUATIONS
.
55
4.4.4
COMPARISON
WITH
A
CONVENTIONAL
WEIGHTING
RULE
.
56
4.5
SPECTROGRAMS
.
58
4.6
CONCLUSION
.
59
5
COMBINED
ECHO
CANCELLATION
AND
NOISE
REDUCTION
65
5.1
OVERVIEW
.
65
5.2
THE
ECHO
CANCELLER
AND
THE
RESIDUAL
ECHO
.
67
5.2.1
THE
WIENER
SOLUTION
.
67
5.2.2
THE
RESIDUAL
ECHO
IN
THE
FREQUENCY
DOMAIN
.
68
5.2.3
MODELLING
THE
ECHO
CANCELLATION
AS
A
TYANSFER
FUNCTION
70
5.3
ESTIMATION
OF
THE
RESIDUAL
ECHO
PSD
.
71
5.3.1
DERIVATION
OF
THE
TRANSFER
FUNCTION
F(FL)
.
71
5.3.2
PROCEDURE
FOR
ESTIMATING
F(FL)
.
72
5.3.3
RESIDUAL
ECHO
PSD
ESTIMATION
.
73
5.4
CORRELATION
CANCELLER
INTERPRETATION
.
73
5.5
REDUCTION
OF
RESIDUAL
ECHO
.
76
5.6
COMBINED
REDUCTION
OF
RESIDUAL
ECHO
AND
NOISE
.
78
5.6.1
DERIVATION
OF
SNR
ESTIMATES
.
78
5.6.2
LIMITING
OF
SNR
ESTIMATES
.
80
5.7
A
PSYCHOACOUSTICALLY
MOTIVATED
ALGORITHM
.
82
5.7.1
PRELIMINARY
CONSIDERATIONS
.
82
5.7.2
DISTORTION
COMPONENTS
.
83
5.7.3
DESIGN
OBJECTIVE:
MASK
THE
RESIDUAL
ECHO
AND
NOISE
DISTORTIONS
.
84
5.7.4
DISCUSSION
OF
H
MD
.
85
5.8
EVALUATION
.
87
5.8.1
INSTRUMENTAL
EVALUATIONS
.
89
5.8.2
AUDITIVE
EVALUATIONS
.
92
5.9
MORE
COMMENTS
ON
THE
COMBINED
REDUCTION
.
94
5.10
COMPLEXITY
.
96
5.11
CONCLUSION
.
98
6
SUMMARY
101
A
DERIVATION
OF
THE
TYANSFER
FUNCTION
F(Q)
105
CONTENTS
IX
B
ALGORITHM
FOR
COMBINED
RESIDUAL
ECHO
AND
NOISE
REDUCTION
109
C
DESCRIPTION
OF
THE
SIMULATION
SYSTEM
113
C.L
SIMULATION
SYSTEM
SOFTWARE
.
113
C.2
SIMULATION
SYSTEM
HARDWARE
.
113
C.3
SIMULATION
SYSTEMS
CONFIGURATION
.
114
C.3.1
THE
NOISE
REDUCTION
SYSTEM
.
114
C.3.2
THE
SYSTEM
FOR
COMBINED
ACOUSTIC
ECHO
CANCELLING
AND
NOISE
REDUCTION
.
115
D
INSTRUMENTAL
MEASUREMENTS
117
D.L
OVERVIEW
.
117
D.2
SIMULATION
SYSTEM
MODIFICATIONS
.
118
D.3
INSTRUMENTAL
MEASURES
.
118
D.3.1
SPEECH
DISTORTION
MEASURES
.
118
D.3.2
ECHO
ATTENUATION
MEASURES
.
121
D.3.3
NOISE
ATTENUATION
MEASURES
.
121
D.3.4
MEASURING
OF
THE
SIGNAL-TO-NOISE
RATIO
.
122
E
EXTENDED
SUMMARY
IN
GERMAN
-
KURZFASSUNG
123
ABBREVIATIONS
AND
PRINCIPAL
SYMBOLS
127
REFERENCES
131 |
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| author | Gustafsson, Nils Anders Stefan |
| author_facet | Gustafsson, Nils Anders Stefan |
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| author_sort | Gustafsson, Nils Anders Stefan |
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| building | Verbundindex |
| bvnumber | BV013074417 |
| classification_tum | ELT 540d |
| ctrlnum | (OCoLC)76029351 (DE-599)BVBBV013074417 |
| discipline | Elektrotechnik |
| edition | 1. Aufl. |
| format | Book |
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| genre | (DE-588)4113937-9 Hochschulschrift gnd-content |
| genre_facet | Hochschulschrift |
| id | DE-604.BV013074417 |
| illustrated | Illustrated |
| indexdate | 2024-08-19T00:17:48Z |
| institution | BVB |
| isbn | 3860738305 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-008908125 |
| oclc_num | 76029351 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM |
| owner_facet | DE-91 DE-BY-TUM |
| physical | X, 142 S. graph. Darst. : 21 cm |
| publishDate | 1999 |
| publishDateSearch | 1999 |
| publishDateSort | 1999 |
| publisher | Mainz |
| record_format | marc |
| series | Aachener Beiträge zu digitalen Nachrichtensystemen |
| series2 | Aachener Beiträge zu digitalen Nachrichtensystemen |
| spelling | Gustafsson, Nils Anders Stefan Verfasser aut Enhancement of audio signals by combined acoustic echo cancellation and noise reduction vorgel. von Nils Anders Stefan Gustafsson 1. Aufl. Aachen Mainz 1999 X, 142 S. graph. Darst. : 21 cm txt rdacontent n rdamedia nc rdacarrier Aachener Beiträge zu digitalen Nachrichtensystemen 11 Zugl.: Aachen, Techn. Hochsch., Diss., 1999 Echokompensation (DE-588)4504012-6 gnd rswk-swf Störunterdrückung (DE-588)4312859-2 gnd rswk-swf Freisprecheinrichtung (DE-588)4240971-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Freisprecheinrichtung (DE-588)4240971-8 s Echokompensation (DE-588)4504012-6 s Störunterdrückung (DE-588)4312859-2 s DE-604 Aachener Beiträge zu digitalen Nachrichtensystemen 11 (DE-604)BV010341350 11 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008908125&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Gustafsson, Nils Anders Stefan Enhancement of audio signals by combined acoustic echo cancellation and noise reduction Aachener Beiträge zu digitalen Nachrichtensystemen Echokompensation (DE-588)4504012-6 gnd Störunterdrückung (DE-588)4312859-2 gnd Freisprecheinrichtung (DE-588)4240971-8 gnd |
| subject_GND | (DE-588)4504012-6 (DE-588)4312859-2 (DE-588)4240971-8 (DE-588)4113937-9 |
| title | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction |
| title_auth | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction |
| title_exact_search | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction |
| title_full | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction vorgel. von Nils Anders Stefan Gustafsson |
| title_fullStr | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction vorgel. von Nils Anders Stefan Gustafsson |
| title_full_unstemmed | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction vorgel. von Nils Anders Stefan Gustafsson |
| title_short | Enhancement of audio signals by combined acoustic echo cancellation and noise reduction |
| title_sort | enhancement of audio signals by combined acoustic echo cancellation and noise reduction |
| topic | Echokompensation (DE-588)4504012-6 gnd Störunterdrückung (DE-588)4312859-2 gnd Freisprecheinrichtung (DE-588)4240971-8 gnd |
| topic_facet | Echokompensation Störunterdrückung Freisprecheinrichtung Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008908125&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV010341350 |
| work_keys_str_mv | AT gustafssonnilsandersstefan enhancementofaudiosignalsbycombinedacousticechocancellationandnoisereduction |