EP1655998A2 - Procédé de génération de signaux stéréo pour sources séparées et système acoustique correspondant - Google Patents

Procédé de génération de signaux stéréo pour sources séparées et système acoustique correspondant Download PDF

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Publication number
EP1655998A2
EP1655998A2 EP05110440A EP05110440A EP1655998A2 EP 1655998 A2 EP1655998 A2 EP 1655998A2 EP 05110440 A EP05110440 A EP 05110440A EP 05110440 A EP05110440 A EP 05110440A EP 1655998 A2 EP1655998 A2 EP 1655998A2
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EP
European Patent Office
Prior art keywords
filters
signals
microphone
transfer functions
filter device
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.)
Granted
Application number
EP05110440A
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German (de)
English (en)
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EP1655998B1 (fr
EP1655998A3 (fr
Inventor
Henning Dr. Puder
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Sivantos GmbH
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Siemens Audioligische Technik GmbH
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Publication of EP1655998A3 publication Critical patent/EP1655998A3/fr
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Publication of EP1655998B1 publication Critical patent/EP1655998B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems

Definitions

  • the present invention relates to a method for generating stereo signals in each case for at least two sound sources. Moreover, the present invention relates to a corresponding acoustic system for generating stereo signals. In particular, the present invention relates to hearing aids or hearing aids.
  • a method for generating one mono signal each upon receipt of a plurality of sound sources for each of them is from the article J. Benesty, Y. Huang: Adaptive Signal Processing: Applications in Real-World Problems, Springer-Verlag: Berlin, New York, pages 195- 223, 2003 known.
  • the BSS (Blind Source Separation) methods presented there can separate spatially separated but temporally superimposed sources and reproduce them one at a time.
  • Such a BSS method can be used, for example, in the case of a binaural supply or especially in the case of a binaural directional microphone, with one microphone signal each being used by the right and left hearing device.
  • the BSS method provides only one mono signal for each of the separate sources. If the hearing aid wearer were to receive this signal identically on both hearing aids, he or she could perceive the sources very well separated, but their spatial localization would not be possible. For this purpose, the signals presented on the right and left should differ by the interaural level and transit time differences customary for natural signals.
  • the object of the present invention is therefore to propose a method for better perceptibility of separate sound sources.
  • a corresponding acoustic system should be specified.
  • this object is achieved by a method for generating stereo signals in each case for at least two separated sound sources, by performing a blind source separation of at least two microphone signals for obtaining transfer functions of filters of a first filter device, determining transfer functions of filters of a second filter device with the aid of the transfer functions the filter of the first filter device, wherein their transfer functions each correspond to the quotient of a power density spectral component of the respective sound source and the total power density spectrum of the respective microphone signal, and filtering the at least two microphone signals each with at least two filters of the second filter device, so that two stereo signals are obtained for each microphone signal ,
  • the invention proposes a method for generating stereo signals in each case for at least two separated sound sources, by performing blind source separation of at least two microphone signals by means of a first filter device for obtaining two mono output signals and filtering each of the mono output signals respectively with at least two second filters of a second filter device, whose transfer functions are calculated from the transfer functions of the filters of the first filter device, so that two stereo signals are obtained for each mono output signal.
  • the transfer functions can be calculated from the sound sources to the microphones and multiplied by the mono output signals, from which the transfer functions of the second filters can be obtained.
  • the invention provides an acoustic system for generating stereo signals in each case for at least two separate sound sources, with a microphone device for providing at least two microphone signals, a first filter device for blind source separation of the at least two microphone signals to obtain the transfer functions of filters of the first filter device, a second Filter means for filtering each of the microphone signals, so that two stereo signals can be generated for each microphone signal, and a computing means for determining the transfer functions of filters of the second filter means using the transfer functions of the filter of the first filter means, wherein their transfer functions each of the quotient of a power density spectral component of the respective Sound source and the total power density spectrum of the respective microphone signal correspond.
  • an acoustic system for generating stereo signals respectively for at least two separate sound sources, comprising a microphone means for providing at least two microphone signals, a first filter means for blind source separation of the at least two microphone signals gaining the transfer functions of filters of the first filter means and obtaining two Mono output signals, a second filter device for filtering each of the mono output signals, so that two stereo signals can be generated for each mono output signal, and a computing device for determining the transfer functions of filters of the second filter device by means of the transfer functions of the filters of the first filter device.
  • the method according to the invention and the acoustic system according to the invention advantageously make it possible to estimate the signals to be separated, for example for each hearing device, head set or the like.
  • the first and second filters are realized by Wiener filters. These can be designed adaptively.
  • BSS For the realization of a binaural directional microphone with stereo or binaural reproduction, a BSS method is used. In general, BSS methods can be explained with reference to FIG. To this is again referred to the article by J. Benesty and Y. Huang. Accordingly, the signal transmission from two signal sources to two microphones is described by the signal model SIG. Further processing from the microphones to the output is represented by a BSS model BSS.
  • the signals s1 (k) of the first signal source and the signals s2 (k) of the second signal source are respectively transmitted to both microphones, where k represents sampling times.
  • the transmission functions in the spectral range for the individual transmission paths can be symbolized by signal model filter H ij ( ⁇ ) .
  • the signals of the two signal sources are superimposed additively to the microphone signals x1 (k) and x2 (k) .
  • the BSS model according to FIG. 1 is used.
  • W ij ( ⁇ ) from the microphone signals x1 (k) and x2 (k) a mono output signal y1 (k) and y2 (k) is determined for each source.
  • each of the two microphone signals provides a contribution to the respective output signal.
  • BSS methods now determine the filter values W 11 ( ⁇ ), W 12 ( ⁇ ), W 21 ( ⁇ ) and W 22 ( ⁇ ) .
  • Unknown are the signal model filters H 11 ( ⁇ ), H 12 ( ⁇ ), H 21 ( ⁇ ) and H 22 ( ⁇ ) and the (complex) weights c 1 ( ⁇ ) and c 2 ( ⁇ ) of the signals after separation .
  • the above matrix equation can now be solved for H 11 ( ⁇ ), H 12 ( ⁇ ), H 21 ( ⁇ ) and H 22 ( ⁇ ) .
  • the aim is to obtain stereo signals that are transmitted to the right and left hearing aids and allow the hearing aid wearer a spatial perception.
  • the Wiener filters are calculated for the BSS method.
  • the output signals y1 (k) and y2 (k) of the BSS method are no longer needed for further processing.
  • the filter G now filters the left microphone signal x1 (k) and the right microphone signal x2 (k) so that the stereo output signals z1links (k), z1right (k), z2links (k) and z2right (k) for the binaural Supply or stereo supply result.
  • the left microphone signal x1 (k) is filtered for this purpose by the filter units G 11 ( ⁇ ) and G 12 ( ⁇ ) .
  • the right-hand microphone signal x2 (k) is filtered by the filter units G 21 ( ⁇ ) and G 22 ( ⁇ ) to the stereo signals of the individual sound sources for the right channel.
  • S s1s1 ( ⁇ ) and S s2s2 ( ⁇ ) denote the power density spectra of the two signal sources.
  • the output signals of the BSS method y1 (k), y2 (k) (Y1 ( ⁇ ) and Y2 ( ⁇ ) in the spectral range) are further processed by the filter device H.
  • the mono output signal y2 (k) goes through the two filters H 12 ( ⁇ ) and H 22 ( ⁇ ) are filtered so that the stereo output signals z21inks (k) and z2right (k) result for the signal source S 2 .
  • the filters W ij ( ⁇ ) implicitly estimated in the BSS method are used to calculate the filters H ij ( ⁇ ) which describe the transfer functions from the sources to the microphones. Multiplying these according to the above equations with the estimated mono signals Y1 ( ⁇ ) and Y2 ( ⁇ ) , one obtains the desired binaural signals. This calculation is possible since the compensation factors c1 and c2 missing for the determination of the filter values H ij ( ⁇ ) and the source signals S1 ( ⁇ ) and S2 ( ⁇ ) cancel each other out in the multiplication.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Neurosurgery (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)
EP05110440.4A 2004-11-08 2005-11-08 Procédé de génération de signaux stéréo pour sources séparées et système acoustique correspondant Not-in-force EP1655998B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004053790A DE102004053790A1 (de) 2004-11-08 2004-11-08 Verfahren zur Erzeugung von Stereosignalen für getrennte Quellen und entsprechendes Akustiksystem

Publications (3)

Publication Number Publication Date
EP1655998A2 true EP1655998A2 (fr) 2006-05-10
EP1655998A3 EP1655998A3 (fr) 2006-10-11
EP1655998B1 EP1655998B1 (fr) 2014-10-15

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EP05110440.4A Not-in-force EP1655998B1 (fr) 2004-11-08 2005-11-08 Procédé de génération de signaux stéréo pour sources séparées et système acoustique correspondant

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Country Link
US (1) US7831052B2 (fr)
EP (1) EP1655998B1 (fr)
DE (1) DE102004053790A1 (fr)
DK (1) DK1655998T3 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912474A1 (fr) 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive et prothèse auditive
WO2008043731A1 (fr) 2006-10-10 2008-04-17 Siemens Audiologische Technik Gmbh Procédé de fonctionnement d'une aide auditive et aide auditive
DE102006047983A1 (de) * 2006-10-10 2008-04-24 Siemens Audiologische Technik Gmbh Verarbeitung eines Eingangssignals in einem Hörgerät
DE102006047986A1 (de) * 2006-10-10 2008-04-24 Siemens Audiologische Technik Gmbh Verarbeitung eines Eingangssignals in einer Hörhilfe
EP1962556A2 (fr) 2007-02-22 2008-08-27 Siemens Audiologische Technik GmbH Procédé d'amélioration de la prise de conscience spatiale et dispositif auditif correspondant
EP2018079A1 (fr) 2007-07-20 2009-01-21 Siemens Audiologische Technik GmbH Procédé de traitement du signal dans une aide auditive
US8325957B2 (en) 2006-10-10 2012-12-04 Siemens Audiologische Technik Gmbh Hearing aid and method for operating a hearing aid
US8705751B2 (en) 2008-06-02 2014-04-22 Starkey Laboratories, Inc. Compression and mixing for hearing assistance devices
US9031242B2 (en) 2007-11-06 2015-05-12 Starkey Laboratories, Inc. Simulated surround sound hearing aid fitting system
US9185500B2 (en) 2008-06-02 2015-11-10 Starkey Laboratories, Inc. Compression of spaced sources for hearing assistance devices
US9485589B2 (en) 2008-06-02 2016-11-01 Starkey Laboratories, Inc. Enhanced dynamics processing of streaming audio by source separation and remixing
CN110675892A (zh) * 2019-09-24 2020-01-10 北京地平线机器人技术研发有限公司 多位置语音分离方法和装置、存储介质、电子设备

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* Cited by examiner, † Cited by third party
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EP1912472A1 (fr) * 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive and prothèse auditive
DE102007010601A1 (de) 2007-03-05 2008-09-25 Siemens Audiologische Technik Gmbh Hörsystem mit verteilter Signalverarbeitung und entsprechendes Verfahren
WO2010004473A1 (fr) * 2008-07-07 2010-01-14 Koninklijke Philips Electronics N.V. Amélioration audio
EP2211563B1 (fr) 2009-01-21 2011-08-24 Siemens Medical Instruments Pte. Ltd. Procédé et système de séparation aveugle de sources pour améliorer l'estimation d'interférence dans un filtrage de Wiener binaural
DK2234415T3 (da) * 2009-03-24 2012-02-13 Siemens Medical Instr Pte Ltd Fremgangsmåde og akustisk signalbearbejdningssystem til binaural støjreduktion
DE102013207149A1 (de) * 2013-04-19 2014-11-06 Siemens Medical Instruments Pte. Ltd. Steuerung der Effektstärke eines binauralen direktionalen Mikrofons
EP3588979B1 (fr) * 2018-06-22 2020-09-23 Sivantos Pte. Ltd. Procédé permettant d'améliorer une directivité de signal dans un instrument d'aide auditive

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EP1326478A2 (fr) * 2003-03-07 2003-07-09 Phonak Ag Procédé de génération des signaux de commande, procédé de transmission des signaux de commande et une prothèse auditive
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EP1509065A1 (fr) * 2003-08-21 2005-02-23 Bernafon Ag Procédé de traitement de signaux audio

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US6526148B1 (en) * 1999-05-18 2003-02-25 Siemens Corporate Research, Inc. Device and method for demixing signal mixtures using fast blind source separation technique based on delay and attenuation compensation, and for selecting channels for the demixed signals

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US6704369B1 (en) * 1999-08-16 2004-03-09 Matsushita Electric Industrial Co., Ltd. Apparatus and method for signal separation and recording medium for the same
EP1326478A2 (fr) * 2003-03-07 2003-07-09 Phonak Ag Procédé de génération des signaux de commande, procédé de transmission des signaux de commande et une prothèse auditive
EP1509065A1 (fr) * 2003-08-21 2005-02-23 Bernafon Ag Procédé de traitement de signaux audio

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1912474A1 (fr) 2006-10-10 2008-04-16 Siemens Audiologische Technik GmbH Procédé pour le fonctionnement d'une prothèse auditive et prothèse auditive
US8325954B2 (en) 2006-10-10 2012-12-04 Siemens Audiologische Technik Gmbh Processing an input signal in a hearing aid
DE102006047983A1 (de) * 2006-10-10 2008-04-24 Siemens Audiologische Technik Gmbh Verarbeitung eines Eingangssignals in einem Hörgerät
DE102006047982A1 (de) * 2006-10-10 2008-04-24 Siemens Audiologische Technik Gmbh Verfahren zum Betreiben einer Hörfilfe, sowie Hörhilfe
DE102006047986A1 (de) * 2006-10-10 2008-04-24 Siemens Audiologische Technik Gmbh Verarbeitung eines Eingangssignals in einer Hörhilfe
US8325957B2 (en) 2006-10-10 2012-12-04 Siemens Audiologische Technik Gmbh Hearing aid and method for operating a hearing aid
WO2008043731A1 (fr) 2006-10-10 2008-04-17 Siemens Audiologische Technik Gmbh Procédé de fonctionnement d'une aide auditive et aide auditive
US8331591B2 (en) 2006-10-10 2012-12-11 Siemens Audiologische Technik Gmbh Hearing aid and method for operating a hearing aid
US8194900B2 (en) 2006-10-10 2012-06-05 Siemens Audiologische Technik Gmbh Method for operating a hearing aid, and hearing aid
EP1912471A3 (fr) * 2006-10-10 2011-05-11 Siemens Audiologische Technik GmbH Traitement d'un signal d'entrée dans une prothése auditive
DE102006047986B4 (de) * 2006-10-10 2012-06-14 Siemens Audiologische Technik Gmbh Verarbeitung eines Eingangssignals in einem Hörgerät
US8199949B2 (en) 2006-10-10 2012-06-12 Siemens Audiologische Technik Gmbh Processing an input signal in a hearing aid
EP1962556A3 (fr) * 2007-02-22 2009-05-06 Siemens Audiologische Technik GmbH Procédé d'amélioration de la prise de conscience spatiale et dispositif auditif correspondant
EP1962556A2 (fr) 2007-02-22 2008-08-27 Siemens Audiologische Technik GmbH Procédé d'amélioration de la prise de conscience spatiale et dispositif auditif correspondant
EP2018079A1 (fr) 2007-07-20 2009-01-21 Siemens Audiologische Technik GmbH Procédé de traitement du signal dans une aide auditive
DE102007033877B3 (de) * 2007-07-20 2009-02-05 Siemens Audiologische Technik Gmbh Verfahren zur Signalverarbeitung in einer Hörhilfe
US8515107B2 (en) 2007-07-20 2013-08-20 Siemens Audiologische Technik Gmbh Method for signal processing in a hearing aid
US9031242B2 (en) 2007-11-06 2015-05-12 Starkey Laboratories, Inc. Simulated surround sound hearing aid fitting system
US8705751B2 (en) 2008-06-02 2014-04-22 Starkey Laboratories, Inc. Compression and mixing for hearing assistance devices
US9185500B2 (en) 2008-06-02 2015-11-10 Starkey Laboratories, Inc. Compression of spaced sources for hearing assistance devices
US9332360B2 (en) 2008-06-02 2016-05-03 Starkey Laboratories, Inc. Compression and mixing for hearing assistance devices
US9485589B2 (en) 2008-06-02 2016-11-01 Starkey Laboratories, Inc. Enhanced dynamics processing of streaming audio by source separation and remixing
US9924283B2 (en) 2008-06-02 2018-03-20 Starkey Laboratories, Inc. Enhanced dynamics processing of streaming audio by source separation and remixing
CN110675892A (zh) * 2019-09-24 2020-01-10 北京地平线机器人技术研发有限公司 多位置语音分离方法和装置、存储介质、电子设备

Also Published As

Publication number Publication date
US7831052B2 (en) 2010-11-09
US20060120535A1 (en) 2006-06-08
DK1655998T3 (en) 2015-01-19
DE102004053790A1 (de) 2006-05-18
EP1655998B1 (fr) 2014-10-15
EP1655998A3 (fr) 2006-10-11

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