WO1997010586A1 - System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions - Google Patents
System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions Download PDFInfo
- Publication number
- WO1997010586A1 WO1997010586A1 PCT/US1996/014665 US9614665W WO9710586A1 WO 1997010586 A1 WO1997010586 A1 WO 1997010586A1 US 9614665 W US9614665 W US 9614665W WO 9710586 A1 WO9710586 A1 WO 9710586A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- noise
- speech
- filter circuit
- estimate
- energy
- Prior art date
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02168—Noise filtering characterised by the method used for estimating noise the estimation exclusively taking place during speech pauses
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/78—Detection of presence or absence of voice signals
- G10L2025/783—Detection of presence or absence of voice signals based on threshold decision
- G10L2025/786—Adaptive threshold
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0232—Processing in the frequency domain
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Quality & Reliability (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Noise Elimination (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL96325532A PL185513B1 (en) | 1995-09-14 | 1996-09-13 | System for adaptively filtering audio signals in order to improve speech intellegibitity in presence a noisy environment |
BR9610290A BR9610290A (en) | 1995-09-14 | 1996-09-13 | Process to increase speech intelligibility in audio signals apparatus to reduce noise in frames received from digitized audio signals and telecommunications system |
EP96931552A EP0852052B1 (en) | 1995-09-14 | 1996-09-13 | System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions |
DE69613380T DE69613380D1 (en) | 1995-09-14 | 1996-09-13 | SYSTEM FOR ADAPTIVELY FILTERING SOUND SIGNALS TO IMPROVE VOICE UNDER ENVIRONMENTAL NOISE |
AU70784/96A AU724111B2 (en) | 1995-09-14 | 1996-09-13 | System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions |
JP9512112A JPH11514453A (en) | 1995-09-14 | 1996-09-13 | A system for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions |
EE9800068A EE03456B1 (en) | 1995-09-14 | 1996-09-13 | Adaptive filtering system for audio signals to improve speech clarity in noisy environments |
NO981074A NO981074L (en) | 1995-09-14 | 1998-03-11 | Improving speech information in audio signals |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US52800595A | 1995-09-14 | 1995-09-14 | |
US08/528,005 | 1995-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997010586A1 true WO1997010586A1 (en) | 1997-03-20 |
Family
ID=24103874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/014665 WO1997010586A1 (en) | 1995-09-14 | 1996-09-13 | System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP0852052B1 (en) |
JP (1) | JPH11514453A (en) |
KR (1) | KR100423029B1 (en) |
CN (1) | CN1121684C (en) |
AU (1) | AU724111B2 (en) |
BR (1) | BR9610290A (en) |
CA (1) | CA2231107A1 (en) |
DE (1) | DE69613380D1 (en) |
EE (1) | EE03456B1 (en) |
MX (1) | MX9801857A (en) |
NO (1) | NO981074L (en) |
PL (1) | PL185513B1 (en) |
RU (1) | RU2163032C2 (en) |
TR (1) | TR199800475T1 (en) |
WO (1) | WO1997010586A1 (en) |
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Also Published As
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EE9800068A (en) | 1998-08-17 |
TR199800475T1 (en) | 1998-06-22 |
AU724111B2 (en) | 2000-09-14 |
PL325532A1 (en) | 1998-08-03 |
KR100423029B1 (en) | 2004-07-01 |
AU7078496A (en) | 1997-04-01 |
EE03456B1 (en) | 2001-06-15 |
DE69613380D1 (en) | 2001-07-19 |
EP0852052B1 (en) | 2001-06-13 |
RU2163032C2 (en) | 2001-02-10 |
NO981074L (en) | 1998-05-13 |
CA2231107A1 (en) | 1997-03-20 |
MX9801857A (en) | 1998-11-29 |
EP0852052A1 (en) | 1998-07-08 |
CN1121684C (en) | 2003-09-17 |
KR19990044659A (en) | 1999-06-25 |
NO981074D0 (en) | 1998-03-11 |
PL185513B1 (en) | 2003-05-30 |
JPH11514453A (en) | 1999-12-07 |
CN1201547A (en) | 1998-12-09 |
BR9610290A (en) | 1999-03-16 |
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