EP1304902A1 - Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant - Google Patents

Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant Download PDF

Info

Publication number
EP1304902A1
EP1304902A1 EP01125071A EP01125071A EP1304902A1 EP 1304902 A1 EP1304902 A1 EP 1304902A1 EP 01125071 A EP01125071 A EP 01125071A EP 01125071 A EP01125071 A EP 01125071A EP 1304902 A1 EP1304902 A1 EP 1304902A1
Authority
EP
European Patent Office
Prior art keywords
input signal
frequency range
interference
signal part
synthesized
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.)
Withdrawn
Application number
EP01125071A
Other languages
German (de)
English (en)
Inventor
Roland Dr. Aubauer
Volkmar Hamacher
Stefano Ambrosius Dr. Klinke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP01125071A priority Critical patent/EP1304902A1/fr
Priority to PCT/EP2002/011014 priority patent/WO2003037032A1/fr
Priority to CN02820985.0A priority patent/CN1575620A/zh
Priority to US10/493,283 priority patent/US20050036629A1/en
Publication of EP1304902A1 publication Critical patent/EP1304902A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/453—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback electronically
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/02—Circuits for transducers for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/03—Synergistic effects of band splitting and sub-band processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

Definitions

  • the invention relates to a method for Elimination of interference from a redundant acoustic input signal an acoustic reproduction device such as a cell phone or a hearing aid where the disorder is in a Partial frequency range of a total frequency range of Input signal is concentrated and on a device for Execution of the procedure.
  • spectral Subtraction method To suppress interference signals in acoustic signals is also the use of statistical Noise reduction methods known as spectral Subtraction method, the Wiener filter, method from Ephraim & Malah, R. Martin etc. These methods use the different statistical properties of voice useful signals and interference signals. It is assumed, that an interference signal is significantly more stationary than a voice useful signal. The interference signal component is usually in Speech breaks estimated and continuously frequency-specific from subtracted from the disturbed input signal. The estimate of the Interference is particularly important in the case of a transient fault difficult, especially if the interference signal is higher Level as the useful signal.
  • the invention is based on the object a procedure for interference freeing of a redundant acoustic Signals of an acoustic reproduction device and one To create a device for its implementation, in which the sonic quality of the resulting acoustic Output signal is improved.
  • the removed partial frequency range of the Input signal in which the interference is concentrated, synthesized due to a non-removed Frequency range of the input signal.
  • a partial frequency spectrum can be used to spectrum adjacent to the sub-frequency spectrum synthesize.
  • the one to be retained Input signal part d. H. the essentially not with Part of the total frequency range of the Input signal, with the synthesized sub-frequency range, in which the disturbance falls, merged to face one another output signal with reduced interference produce.
  • the partial frequency range of the input signal is preferably synthesized by means of a bandwidth expansion method.
  • a bandwidth expansion method For example, for an expansion of the bandwidth in the lower frequency range ( ⁇ 300 Hz) from EP 0 994 464 A a restoration of signal components of the lower frequency range of a voice signal limited by a high-pass function to low frequencies is known, the high-pass filtering described being carried out, for example, during voice transmission over a telephone at the remote subscriber.
  • the restoration is done by generating Frequencies in the lower frequency range by a non-linear signal processing, using the subharmonic Frequencies of the signal generated and added to the high-pass signal be added. It should be emphasized that this is in EP 0 994
  • the method described in 464 A does not relieve interference a mobile phone or hearing aid the subject.
  • the new procedure among other things with mobile phones, hands-free devices, Hearing aids and other communication devices that are used for a mobile or use in noisy environments are intended to be used.
  • the synthesized is in step c) Partial frequency range of the input signal to adapt to the maintain input signal part of the input signal filtered. This ensures that the d) merging of these two signal parts taking place leads to a noise-reduced output signal, the Frequency spectrum as good as possible Total frequency spectrum of the useful signal of the input signal corresponds, in particular also in terms of intensity.
  • the characteristics of the in step a) spectral filter used are taken into account because they determine the frequency band to be synthesized. There are special effects for the flank area an inserted filter.
  • Step c) synthesized partial frequency range of the Input signal on the low frequency side of the Total frequency range of the input signal is.
  • the intensities of the disturbances are significantly higher than that Nutzsignalintensticianen.
  • Another advantage of this new process is that that even highly transient disturbances can be removed, which is not possible with spectral subtraction methods.
  • the new method can also be carried out more conveniently with a Gradient microphone can be combined because of its disadvantages, such as pop and flow noise sensitivity can.
  • the device is a Device for detecting whether the input signal in the Blocking range of the filter shows a fault, and has a Switch for bridging the interference suppression means due to a lack of interference in the blocking area of the filter is provided. This ensures that the Interference suppression means can only be switched on if there is actually a fault in the blocked area of the filter located.
  • the Device a device for detecting or estimating a Has intensity of the disturbance and a switch for Bridging the interference suppressant due to the Intensity detection / estimation is provided. This allows it that the interference suppression means only switched on if this is due to the intensity of the disorder is felt necessary.
  • a manual Setting a threshold value for the detection or Estimating the intensity of the user interference for example, a cell phone.
  • Switch for bridging the interference suppressor can preferably also a device for blending the Input signal part in the blocking area of the filter and synthesized signal part, depending on the degree of interference in the Blocking area of the filter can be provided.
  • the invention is based on a Embodiment with reference to the drawing explained in more detail.
  • the drawing shows a block diagram a device for interference suppression of a redundant acoustic input signal.
  • the only drawing figure shows a procedure and Components required to carry out the method improvement of the sound of a person with a disturbance redundant, acoustic input signal 1, such as one Speech signal.
  • Speech signals are inherent in that frequency spectrum present at a certain point in time is completely needed to make a statement about it hit which according to the current frequency spectrum is to be assigned.
  • speech signals are redundant, i. H. part of the frequency spectrum can be omitted, essentially with no loss of information about the total frequency spectrum. This is due to the fact that from the maintained frequency spectrum to the partial frequency spectrum, which was dispensed with, can be inferred.
  • the value of 300 Hz thus forms the cut-off frequency f A of the high-pass filter 2.
  • Both the signal 4 to be maintained and that further on processing signal 5 essentially have none Frequency components in the range below 300 Hz, so that a Interference that is concentrated below 300 Hz from which Input signal 1 is removed.
  • that relates explained embodiment of a fault on the low frequency side of the entire frequency range of the Input signal 1 is concentrated.
  • the next step in the process is that with the High-pass filter 2 removed sub-frequency spectrum synthesize, with the help of the transmitted Frequency spectrum of the signal to be processed 5.
  • the signal 5 to be processed is first one Low-pass filter 6 supplied in the illustrated Embodiment frequencies higher than the 2 kHz strong attenuates.
  • the low-pass filter 6 is for performing the Procedure not mandatory, but simplified signal processing in a non-linear Processing device 7. In particular, by the Use of the non-linear processing device 7 so-called Intermodulation effects occur, the appearance of which by the Low pass filter 6 is reduced or avoided.
  • the non-linear processing device 7 now generates either directly from the signal to be processed 5 or from an output signal of the low-pass filter 6 low frequency spectrum, taking into account the Characteristic of the high-pass filter 2, which is known and in non-linear signal processing immediately is taken into account.
  • the non-linear Processing device 7 is used to restore Amplitudes of the fundamental frequency and / or missing harmonics in Dependency of the underlying speech signal.
  • the one leaving the non-linear processing device 7 The signal thus ideally comprises the fundamental frequency and the missing harmonics of the input signal 1, which in the High pass filter 2, together with the interference, has been removed are.
  • the output signal in the form of a synthesized speech signal from the non-linear processing device 7 is then fed to a bandpass filter 8 which passes frequencies below the cut-off frequency f A of 300 Hz of the high-pass filter 2 and a lower cut-off frequency f B of, for example, 100 Hz.
  • the bandpass filter 8 can also be replaced by a low-pass filter with a cut-off frequency of 300 Hz. If, however, DC voltage components are to be removed from the output signal of the non-linear processing device 7, suitable filtering should be carried out with the bandpass filter 8.
  • An output signal of the bandpass filter 8 becomes one Junction point 9 as an output signal generating device forwarded to the bandwidth extension to the signal part 4 to be retained is added to one noise-reduced output signal 10 to obtain the ideally all the speech useful signal frequencies of the Should have input signal 1 with a suitable amplitude.
  • the device illustrated in the drawing for Relief of the input signal 1 from a disturbance can also be modified in such a way that one on the high-frequency Side of the frequency spectrum of the input signal 1 lying Interference is removed by a low-pass filter, then a non-linear processing unit would be provided, the a bandwidth expansion process towards high frequencies can perform.
  • the bandpass filter 8 would also be through from the figure replace a filter, which at node 9 a appropriate linkage of the synthesized signal part with the allowed to keep signal part 4.
  • the interference can also occur within the overall frequency range of the input signal 1.
  • either the one on the high-frequency side of the disturbance Frequency range of the input signal 1 or that on the low frequency side of the interference lying frequency range of the Input signal 1 for performing a Bandwidth expansion method can be used, where the non-linear processing unit for closing a Frequency gap is used by a bandpass filter instead of High pass filter 2 is brought about.
  • Embodiments of the invention may include means be, depending on external parameters, switching on the device according to the drawing.
  • a hard switch a device for blending the Input signal 1 in the restricted area of the used Filters provided with the synthesized signal part.
  • the degree of cross-fading can vary from the intensity of one the present fault.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Neurosurgery (AREA)
  • Noise Elimination (AREA)
  • Telephone Function (AREA)
EP01125071A 2001-10-22 2001-10-22 Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant Withdrawn EP1304902A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01125071A EP1304902A1 (fr) 2001-10-22 2001-10-22 Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant
PCT/EP2002/011014 WO2003037032A1 (fr) 2001-10-22 2002-10-01 Procede et dispositif pour deparasiter un signal acoustique repetitif
CN02820985.0A CN1575620A (zh) 2001-10-22 2002-10-01 消除冗余音频信号的干扰的方法和装置
US10/493,283 US20050036629A1 (en) 2001-10-22 2002-10-01 Method and device for the interference elimination of a redundant acoustic signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01125071A EP1304902A1 (fr) 2001-10-22 2001-10-22 Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant

Publications (1)

Publication Number Publication Date
EP1304902A1 true EP1304902A1 (fr) 2003-04-23

Family

ID=8179033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01125071A Withdrawn EP1304902A1 (fr) 2001-10-22 2001-10-22 Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant

Country Status (4)

Country Link
US (1) US20050036629A1 (fr)
EP (1) EP1304902A1 (fr)
CN (1) CN1575620A (fr)
WO (1) WO2003037032A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357800B3 (de) * 2003-12-10 2005-05-25 Siemens Audiologische Technik Gmbh Hörgerät mit Störgeräuschunterdrückung und entsprechendes Störgeräuschunterdrückungsverfahren
DE102006020832A1 (de) * 2006-05-04 2007-11-15 Siemens Audiologische Technik Gmbh Verfahren zum Unterdrücken von Rückkopplungen und zur Spektralerweiterung bei Hörvorrichtungen

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7979487B2 (en) * 2007-10-19 2011-07-12 Sennheiser Electronic Gmbh & Co. Kg Microphone device
EP2148526B1 (fr) * 2008-07-24 2020-08-19 Oticon A/S Modification de contenu spectral pour évaluation de canal de réponse robuste
US8924204B2 (en) * 2010-11-12 2014-12-30 Broadcom Corporation Method and apparatus for wind noise detection and suppression using multiple microphones
CN102186132A (zh) * 2010-12-30 2011-09-14 成都天奥信息科技有限公司 一种数字静噪方法
US9721581B2 (en) * 2015-08-25 2017-08-01 Blackberry Limited Method and device for mitigating wind noise in a speech signal generated at a microphone of the device
CN110120229B (zh) * 2018-02-05 2024-09-20 北京三星通信技术研究有限公司 虚拟现实vr音频信号的处理方法及相应设备
US10812119B1 (en) * 2019-06-19 2020-10-20 Nxp B.V. Systems and methods involving interference cancellation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324405A1 (de) * 1983-07-06 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur unterdrueckung von stoersignalen
JPH07143363A (ja) * 1993-11-15 1995-06-02 Matsushita Electric Ind Co Ltd 雑音低減回路
JPH08102871A (ja) * 1994-09-30 1996-04-16 Matsushita Electric Ind Co Ltd 雑音低減装置
EP0994464A1 (fr) * 1998-10-13 2000-04-19 Koninklijke Philips Electronics N.V. Procédé destiné à génére un signal large bande a partir d'un signal en bande étroite, appareil pour realiser un tel procédé et equipement téléphonique comportant un tel appareil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910000368B1 (ko) * 1984-09-12 1991-01-24 마쯔시다덴기산교 가부시기가이샤 비선형 신호처리장치
US5825898A (en) * 1996-06-27 1998-10-20 Lamar Signal Processing Ltd. System and method for adaptive interference cancelling
US6563803B1 (en) * 1997-11-26 2003-05-13 Qualcomm Incorporated Acoustic echo canceller
US6829360B1 (en) * 1999-05-14 2004-12-07 Matsushita Electric Industrial Co., Ltd. Method and apparatus for expanding band of audio signal
US6785382B2 (en) * 2001-02-12 2004-08-31 Signalworks, Inc. System and method for controlling a filter to enhance speakerphone performance
US6549629B2 (en) * 2001-02-21 2003-04-15 Digisonix Llc DVE system with normalized selection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324405A1 (de) * 1983-07-06 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur unterdrueckung von stoersignalen
JPH07143363A (ja) * 1993-11-15 1995-06-02 Matsushita Electric Ind Co Ltd 雑音低減回路
JPH08102871A (ja) * 1994-09-30 1996-04-16 Matsushita Electric Ind Co Ltd 雑音低減装置
EP0994464A1 (fr) * 1998-10-13 2000-04-19 Koninklijke Philips Electronics N.V. Procédé destiné à génére un signal large bande a partir d'un signal en bande étroite, appareil pour realiser un tel procédé et equipement téléphonique comportant un tel appareil

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 08 30 August 1996 (1996-08-30) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357800B3 (de) * 2003-12-10 2005-05-25 Siemens Audiologische Technik Gmbh Hörgerät mit Störgeräuschunterdrückung und entsprechendes Störgeräuschunterdrückungsverfahren
US7574012B2 (en) 2003-12-10 2009-08-11 Siemens Audiologische Technik Gmbh Hearing aid with noise suppression, and operating method therefor
DE102006020832A1 (de) * 2006-05-04 2007-11-15 Siemens Audiologische Technik Gmbh Verfahren zum Unterdrücken von Rückkopplungen und zur Spektralerweiterung bei Hörvorrichtungen
EP1853089A3 (fr) * 2006-05-04 2007-12-26 Siemens Audiologische Technik GmbH Méthode pour la suppression de la rétroaction et pour l'éxpansion spéctrale pour des appareils de correction auditive
US8571243B2 (en) 2006-05-04 2013-10-29 Siemens Audiologische Technik Gmbh Method for suppressing feedback and for spectral extension in hearing devices
DE102006020832B4 (de) * 2006-05-04 2016-10-27 Sivantos Gmbh Verfahren zum Unterdrücken von Rückkopplungen bei Hörvorrichtungen

Also Published As

Publication number Publication date
CN1575620A (zh) 2005-02-02
WO2003037032A1 (fr) 2003-05-01
US20050036629A1 (en) 2005-02-17

Similar Documents

Publication Publication Date Title
DE19747885B4 (de) Verfahren zur Reduktion von Störungen akustischer Signale mittels der adaptiven Filter-Methode der spektralen Subtraktion
DE60116255T2 (de) Rauschunterdückungsvorrichtung und -verfahren
DE69428119T2 (de) Verringerung des hintergrundrauschens zur sprachverbesserung
EP1853089B2 (fr) Méthode pour la suppression de la rétroaction et pour l'éxpansion spéctrale pour des appareils de correction auditive
DE60004539T2 (de) Teilband-unterdrückung einer akustischen rückkopplung in hörgeräten
DE2526034A1 (de) Hoerhilfeverfahren und vorrichtung zur durchfuehrung des verfahrens
EP0668007B1 (fr) Appareil radiotelephonique mobile a dispositif mains libres
DE2207141C3 (de) Schaltungsanordnung zur Unterdrückung unerwünschter Sprachsignale mittels eines vorhersagenden Filters
DE69730721T2 (de) Verfahren und vorrichtungen zur geräuschkonditionierung von signalen welche audioinformationen darstellen in komprimierter und digitalisierter form
DE10017646A1 (de) Geräuschunterdrückung im Zeitbereich
EP1456839B1 (fr) Procede et dispositif de suppression de signaux perturbateurs periodiques
EP3375204B1 (fr) Traitement de signal audio dans un véhicule
EP1189419B1 (fr) Procede et appareil pour eliminer l'interference d'un haut-parleur sur de signaux de microphone
EP1304902A1 (fr) Procédé et dispositif pour la suppression du bruit dans un signal acoustique redondant
DE60317368T2 (de) Nichtlinearer akustischer echokompensator
DE102013011761A1 (de) Kraftfahrzeug mit einer Freisprecheinrichtung und Verfahren zur Erzeugung eines Frequenzganges für Freisprecheinrichtungen
WO2001047335A2 (fr) Procede pour eliminer des composantes de signaux parasites dans un signal d'entree d'un systeme auditif, mise en oeuvre dudit procede et appareil auditif
EP1705952A2 (fr) Appareil auditif et procédé pour la réduction de bruits de vent
DE102015204253B4 (de) Verfahren zur frequenzabhängigen Rauschunterdrückung eines Eingangssignals sowie Hörgerät
EP1062487B1 (fr) Dispositif a microphone pour la reconnaissance vocale dans des conditions spatiales variables
DE3027953A1 (de) Elektro-akustisches hoergeraet mit adaptiver filterschaltung
DE10025655B4 (de) Verfahren zum Entfernen einer unerwünschten Komponente aus einem Signal und System zum Unterscheiden zwischen unerwünschten und erwünschten Signalkomponenten
AT507844B1 (de) Methode zur trennung von signalpfaden und anwendung auf die verbesserung von sprache mit elektro-larynx
DE4445983C2 (de) Verfahren zur Rauschunterdrückung und Vorrichtungen zur Durchführung der Verfahren
DE10114015A1 (de) Verfahren zum Betrieb eines Hörhilfe- und/oder Gehörschutzgerätes sowie Hörhilfe- und/oder Gehörschutzgerät

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030616

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070501