EP0912974B1 - Procede pour reduire les parasites dans un signal vocal - Google Patents
Procede pour reduire les parasites dans un signal vocal Download PDFInfo
- Publication number
- EP0912974B1 EP0912974B1 EP97930489A EP97930489A EP0912974B1 EP 0912974 B1 EP0912974 B1 EP 0912974B1 EP 97930489 A EP97930489 A EP 97930489A EP 97930489 A EP97930489 A EP 97930489A EP 0912974 B1 EP0912974 B1 EP 0912974B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- masking curve
- noise
- signal
- spectral
- masking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000000873 masking effect Effects 0.000 claims abstract description 55
- 230000003595 spectral effect Effects 0.000 claims abstract description 33
- 230000002829 reductive effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 21
- 238000001228 spectrum Methods 0.000 description 17
- 238000001914 filtration Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005534 acoustic noise Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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
- G10L21/0264—Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques
Definitions
- the invention relates to a method for reducing Interference with a speech signal.
- Measures to suppress "musical tones" at the spectral subtraction are the overestimation of the interference power overcompensation of the disturbance with the disadvantage the increased speech distortion or allowing one relatively high noise level with the disadvantage of only one low noise reduction (e.g. "Enhancement of Speech Corrupted by Acoustic Noise "by Berouti, M .; Schwartz, R .; Makhoul, J .; in Proceedings on ICASSP, pp. 208-211, 1979).
- Methods for linear or non-linear smoothing and thus to suppress the "musical tones” e.g. in “Suppression of Acoustic Noise in Speech Using Spectral Subtraction "by S.F. Boll in IEEE Vol. ASSP-27, No. 2, pp. 113-120.
- An effective non-linear Smoothing with median filtering is in the DE 44 05 723 A1 specified.
- the object of the present invention is an improved Method of reducing speech signal interference specify.
- the invention is essentially based on the fact that signal components, which can only be heard individually through noise reduction appear, recognized as disturbances and afterwards reduced or eliminated by selective damping become.
- the audibility criterion is in is known to exceed a masking curve (masking threshold).
- fl as the predeterminable basic value (also spectral floor), which represents a lower bound for the filter coefficients and is usually 0.1 ⁇ fl ⁇ 0.25. He decides one in the output signal of the spectral subtraction remaining amount of residual noise that the lowering of the Listening threshold limited and so narrowband portions in noise-reduced output signal of the spectral subtraction partially covered. Compliance with a core value fl improves the subjective hearing impression.
- a characteristic used in the method according to the invention is that they in the output signal of the noise reduction process for that human ear perceptible as a disturbance in appearance to step.
- the second concealment curve makes it noticeable quantified for this output signal become.
- the level threshold of second concealment curve exceeding language useful portions in the output signal, which is already in the input signal as exceeding the level of the first masking curve
- the musical tones can be perceived by comparison the perceptible signal components in the output signal and input signal noise reduction as new audible components distinguished and in a subsequent processing step be selectively damped selectively.
- the invention is not for spectral subtraction Noise reduction limited.
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Quality & Reliability (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Noise Elimination (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Claims (9)
- Procédé pour réduire des parasites d'un signal vocal, selon lequel on utilise un procédé de réduction du bruit et on prend en compte conjointement le masquage spectral psycho-acoustique, caractérisé en ce qu'on détermine une première courbe de masquage spectral pour le signal d'entrée, une seconde courbe de masquage spectral pour le signal de sortie du procédé de réduction des parasites, que des composantes nouvellement audibles du signal de sortie du procédé de réduction des parasites, qui dépassent la seconde courbe de masquage et auxquelles n'est opposée aucune composante spectrale correspondante du signal d'entrée, qui dépasse la première courbe de masquage, sont en outre affaiblies de façon sélective.
- Procédé selon la revendication 1, caractérisé par un procédé spectral de soustraction en tant que procédé de réduction des parasites.
- Procédé selon la revendication 2, caractérisé en ce que les composantes nouvellement audibles sont réduites à leur valeur de base par la soustraction spectrale.
- Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce que les composantes nouvellement audibles sont réduites à leur valeur de la courbe de masquage spectral.
- Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les composantes statiques nouvellement audibles du signal de sortie sont exclues de l'affaiblissement sélectif supplémentaire, pendant un intervalle de temps pouvant être prédéterminé.
- Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la seconde courbe de masquage est déterminée à partir du signal de sortie du procédé de réduction des parasites.
- Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la seconde courbe de masquage est dérivée de la première courbe de masquage.
- Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la première courbe de masquage est déterminée à partir du signal d'entrée du procédé de réduction de parasites.
- Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la première courbe de masquage est déterminée à partir de signaux de bruit pendant des pauses de conversation.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629132 | 1996-07-19 | ||
DE19629132A DE19629132A1 (de) | 1996-07-19 | 1996-07-19 | Verfahren zur Verringerung von Störungen eines Sprachsignals |
PCT/EP1997/003482 WO1998003965A1 (fr) | 1996-07-19 | 1997-07-02 | Procede pour reduire les parasites dans un signal vocal |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0912974A1 EP0912974A1 (fr) | 1999-05-06 |
EP0912974B1 true EP0912974B1 (fr) | 2000-04-12 |
Family
ID=7800259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97930489A Expired - Lifetime EP0912974B1 (fr) | 1996-07-19 | 1997-07-02 | Procede pour reduire les parasites dans un signal vocal |
Country Status (8)
Country | Link |
---|---|
US (1) | US6687669B1 (fr) |
EP (1) | EP0912974B1 (fr) |
JP (1) | JP4187795B2 (fr) |
AT (1) | ATE191806T1 (fr) |
CA (1) | CA2260893C (fr) |
DE (2) | DE19629132A1 (fr) |
ES (1) | ES2146107T3 (fr) |
WO (1) | WO1998003965A1 (fr) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7062039B1 (en) | 1999-05-27 | 2006-06-13 | Telefonaktiebolaget Lm Ericsson | Methods and apparatus for improving adaptive filter performance by inclusion of inaudible information |
US7117149B1 (en) * | 1999-08-30 | 2006-10-03 | Harman Becker Automotive Systems-Wavemakers, Inc. | Sound source classification |
DE19957220A1 (de) * | 1999-11-27 | 2001-06-21 | Alcatel Sa | An den aktuellen Geräuschpegel adaptierte Geräuschunterdrückung |
US6473733B1 (en) | 1999-12-01 | 2002-10-29 | Research In Motion Limited | Signal enhancement for voice coding |
JP3566197B2 (ja) * | 2000-08-31 | 2004-09-15 | 松下電器産業株式会社 | 雑音抑圧装置及び雑音抑圧方法 |
US7457750B2 (en) * | 2000-10-13 | 2008-11-25 | At&T Corp. | Systems and methods for dynamic re-configurable speech recognition |
US20040078199A1 (en) * | 2002-08-20 | 2004-04-22 | Hanoh Kremer | Method for auditory based noise reduction and an apparatus for auditory based noise reduction |
US8073689B2 (en) | 2003-02-21 | 2011-12-06 | Qnx Software Systems Co. | Repetitive transient noise removal |
US8326621B2 (en) | 2003-02-21 | 2012-12-04 | Qnx Software Systems Limited | Repetitive transient noise removal |
US8271279B2 (en) | 2003-02-21 | 2012-09-18 | Qnx Software Systems Limited | Signature noise removal |
US7885420B2 (en) * | 2003-02-21 | 2011-02-08 | Qnx Software Systems Co. | Wind noise suppression system |
US7725315B2 (en) * | 2003-02-21 | 2010-05-25 | Qnx Software Systems (Wavemakers), Inc. | Minimization of transient noises in a voice signal |
US7949522B2 (en) | 2003-02-21 | 2011-05-24 | Qnx Software Systems Co. | System for suppressing rain noise |
US7895036B2 (en) * | 2003-02-21 | 2011-02-22 | Qnx Software Systems Co. | System for suppressing wind noise |
US7406412B2 (en) * | 2004-04-20 | 2008-07-29 | Dolby Laboratories Licensing Corporation | Reduced computational complexity of bit allocation for perceptual coding |
US8543390B2 (en) * | 2004-10-26 | 2013-09-24 | Qnx Software Systems Limited | Multi-channel periodic signal enhancement system |
US8306821B2 (en) * | 2004-10-26 | 2012-11-06 | Qnx Software Systems Limited | Sub-band periodic signal enhancement system |
US7680652B2 (en) | 2004-10-26 | 2010-03-16 | Qnx Software Systems (Wavemakers), Inc. | Periodic signal enhancement system |
US8170879B2 (en) * | 2004-10-26 | 2012-05-01 | Qnx Software Systems Limited | Periodic signal enhancement system |
US7949520B2 (en) * | 2004-10-26 | 2011-05-24 | QNX Software Sytems Co. | Adaptive filter pitch extraction |
US7610196B2 (en) * | 2004-10-26 | 2009-10-27 | Qnx Software Systems (Wavemakers), Inc. | Periodic signal enhancement system |
US7716046B2 (en) * | 2004-10-26 | 2010-05-11 | Qnx Software Systems (Wavemakers), Inc. | Advanced periodic signal enhancement |
DE102005001345B4 (de) * | 2004-11-10 | 2013-01-31 | Ask Industries Gmbh | Verfahren und Vorrichtung zur Verarbeitung und Wiedergabe von Audiosignalen |
US8284947B2 (en) * | 2004-12-01 | 2012-10-09 | Qnx Software Systems Limited | Reverberation estimation and suppression system |
US8027833B2 (en) * | 2005-05-09 | 2011-09-27 | Qnx Software Systems Co. | System for suppressing passing tire hiss |
US8170875B2 (en) | 2005-06-15 | 2012-05-01 | Qnx Software Systems Limited | Speech end-pointer |
US8311819B2 (en) * | 2005-06-15 | 2012-11-13 | Qnx Software Systems Limited | System for detecting speech with background voice estimates and noise estimates |
JP4738213B2 (ja) * | 2006-03-09 | 2011-08-03 | 富士通株式会社 | 利得調整方法及び利得調整装置 |
US7844453B2 (en) | 2006-05-12 | 2010-11-30 | Qnx Software Systems Co. | Robust noise estimation |
US8326620B2 (en) | 2008-04-30 | 2012-12-04 | Qnx Software Systems Limited | Robust downlink speech and noise detector |
US8335685B2 (en) * | 2006-12-22 | 2012-12-18 | Qnx Software Systems Limited | Ambient noise compensation system robust to high excitation noise |
US20080231557A1 (en) * | 2007-03-20 | 2008-09-25 | Leadis Technology, Inc. | Emission control in aged active matrix oled display using voltage ratio or current ratio |
DE102007030209A1 (de) * | 2007-06-27 | 2009-01-08 | Siemens Audiologische Technik Gmbh | Glättungsverfahren |
US8850154B2 (en) | 2007-09-11 | 2014-09-30 | 2236008 Ontario Inc. | Processing system having memory partitioning |
US8904400B2 (en) * | 2007-09-11 | 2014-12-02 | 2236008 Ontario Inc. | Processing system having a partitioning component for resource partitioning |
US8694310B2 (en) | 2007-09-17 | 2014-04-08 | Qnx Software Systems Limited | Remote control server protocol system |
US8209514B2 (en) * | 2008-02-04 | 2012-06-26 | Qnx Software Systems Limited | Media processing system having resource partitioning |
US8135140B2 (en) * | 2008-11-20 | 2012-03-13 | Harman International Industries, Incorporated | System for active noise control with audio signal compensation |
US9020158B2 (en) * | 2008-11-20 | 2015-04-28 | Harman International Industries, Incorporated | Quiet zone control system |
US8718289B2 (en) * | 2009-01-12 | 2014-05-06 | Harman International Industries, Incorporated | System for active noise control with parallel adaptive filter configuration |
US8189799B2 (en) * | 2009-04-09 | 2012-05-29 | Harman International Industries, Incorporated | System for active noise control based on audio system output |
US8199924B2 (en) * | 2009-04-17 | 2012-06-12 | Harman International Industries, Incorporated | System for active noise control with an infinite impulse response filter |
US8077873B2 (en) * | 2009-05-14 | 2011-12-13 | Harman International Industries, Incorporated | System for active noise control with adaptive speaker selection |
US9280964B2 (en) * | 2013-03-14 | 2016-03-08 | Fishman Transducers, Inc. | Device and method for processing signals associated with sound |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3639753A1 (de) * | 1986-11-21 | 1988-06-01 | Inst Rundfunktechnik Gmbh | Verfahren zum uebertragen digitalisierter tonsignale |
DE3805946A1 (de) * | 1988-02-25 | 1989-09-07 | Fraunhofer Ges Forschung | Vorrichtung zur ermittlung von charakteristischen parametern aus den eingangs- und ausgangssignalen eines systems fuer die audiosignalverarbeitung |
US5400409A (en) * | 1992-12-23 | 1995-03-21 | Daimler-Benz Ag | Noise-reduction method for noise-affected voice channels |
DE4307688A1 (de) | 1993-03-11 | 1994-09-15 | Daimler Benz Ag | Verfahren zur Geräuschreduktion für gestörte Sprachkanäle |
EP0683916B1 (fr) * | 1993-02-12 | 1999-08-11 | BRITISH TELECOMMUNICATIONS public limited company | Reduction du bruit |
JP3626492B2 (ja) * | 1993-07-07 | 2005-03-09 | ポリコム・インコーポレイテッド | 会話の品質向上のための背景雑音の低減 |
JP3131542B2 (ja) * | 1993-11-25 | 2001-02-05 | シャープ株式会社 | 符号化復号化装置 |
WO1995016259A1 (fr) | 1993-12-06 | 1995-06-15 | Philips Electronics N.V. | Systeme et dispositif de reduction du bruit et unite de radiotelephone mobile |
DE4405723A1 (de) | 1994-02-23 | 1995-08-24 | Daimler Benz Ag | Verfahren zur Geräuschreduktion eines gestörten Sprachsignals |
-
1996
- 1996-07-19 DE DE19629132A patent/DE19629132A1/de not_active Withdrawn
-
1997
- 1997-07-02 WO PCT/EP1997/003482 patent/WO1998003965A1/fr active IP Right Grant
- 1997-07-02 AT AT97930489T patent/ATE191806T1/de not_active IP Right Cessation
- 1997-07-02 US US09/214,910 patent/US6687669B1/en not_active Expired - Lifetime
- 1997-07-02 JP JP50648198A patent/JP4187795B2/ja not_active Expired - Lifetime
- 1997-07-02 CA CA002260893A patent/CA2260893C/fr not_active Expired - Fee Related
- 1997-07-02 DE DE59701446T patent/DE59701446D1/de not_active Expired - Lifetime
- 1997-07-02 EP EP97930489A patent/EP0912974B1/fr not_active Expired - Lifetime
- 1997-07-02 ES ES97930489T patent/ES2146107T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1998003965A1 (fr) | 1998-01-29 |
JP2002509620A (ja) | 2002-03-26 |
ATE191806T1 (de) | 2000-04-15 |
EP0912974A1 (fr) | 1999-05-06 |
DE19629132A1 (de) | 1998-01-22 |
US6687669B1 (en) | 2004-02-03 |
JP4187795B2 (ja) | 2008-11-26 |
DE59701446D1 (de) | 2000-05-18 |
CA2260893A1 (fr) | 1998-01-29 |
CA2260893C (fr) | 2005-05-17 |
ES2146107T3 (es) | 2000-07-16 |
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