EP1077013A1 - Verfahren und einrichtung zum betrieb von sprachunterstützten systemen in kraftfahrzeugen - Google Patents
Verfahren und einrichtung zum betrieb von sprachunterstützten systemen in kraftfahrzeugenInfo
- Publication number
- EP1077013A1 EP1077013A1 EP99924872A EP99924872A EP1077013A1 EP 1077013 A1 EP1077013 A1 EP 1077013A1 EP 99924872 A EP99924872 A EP 99924872A EP 99924872 A EP99924872 A EP 99924872A EP 1077013 A1 EP1077013 A1 EP 1077013A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voice
- signal
- microphone
- loudspeaker
- acoustic
- 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
Links
Classifications
-
- 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
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
Definitions
- the invention relates to a method and a device for operating voice-assisted systems, such as communication and / or speech / intercom systems in motor vehicles, in which speech signals are recorded and passed on to at least one loudspeaker via a multiple microphone arrangement, according to the preamble of claims 1 and 7.
- Methods of this type are used in motor vehicles on the one hand for voice-assisted two-way operation, or else to support voice-input-controlled electronic or electrical assemblies.
- the basic problem here is that.
- a corresponding background noise is present in the motor vehicle. This covers the voice commands.
- Intercom and intercom systems in motor vehicles are predominantly advantageous for large vehicles, minibuses and the like. However, they can also be used in normal passenger cars.
- voice-controlled input units for electrical components in the vehicle suppressing the background noise or filtering out the voice command is of particular importance.
- EP 0078014 B1 discloses a speech recognition device for a motor vehicle, in which the amplifier system of the speech recognition device reports or feeds via sensors whether the engine is in operation and / or the vehicle is moving. Then a level control is then used to try to filter the voice command out of the background noise.
- a filtering is known from WO 97/34290, in which periodic interference signals are filtered out, in which their period is determined and interfered by means of a generator, so that the speech signal remains.
- a method is known from DE 4106405C 2 in which noise is subtracted from the speech signal, a plurality of microphones being used.
- DE 3925589 A1 discloses the use of a multiple microphone arrangement, one of the microphones being arranged in the engine compartment and another in the passenger compartment when used in a motor vehicle. The two signals are then subtracted.
- the disadvantage here is that only the engine noise or the actual operating noise of the vehicle itself is subtracted from the overall signal in the passenger compartment. Specific background noises are not taken into account here.
- the invention is therefore based on the object of developing a method and a device of the generic type in such a way that feedbacks and instabilities which occur when a plurality of microphones and loudspeakers are arranged are suppressed.
- the invention is based both on the method and on the installation of a communication and / or intercom device in motor vehicles. It is also known to arrange a multiple microphone arrangement, to also record voice and noise signals and to subtract the noise signals from the overall signal, so that the voice signal remains filtered.
- the essence of the invention is that the respective microphone signal is first shifted in frequency by a small amount ⁇ F, and is only then given to the speaker or speakers or to the input of a voice-controlled device.
- the frequency shift according to the invention which is carried out here at a defined point and is not arbitrary, supports filtering on the one hand and feedback, ie the echo signal, is also coupled out.
- the method according to the invention and the device according to the invention which relate to the interconnection of the individual elements with one another, elegantly eliminate feedback effects. Since the feedback as such always occurs when the microphone location and loudspeaker location are close together, which is compulsorily the case in motor vehicles, the elimination of this feedback is of considerable importance in the application mentioned. This applies not only in the case of two-way communication, in which electro-acoustic feedback is uncomfortable for the occupants, but is also of particular importance when using voice-controlled input interfaces of electrical or electronic components on the motor vehicle. This only applies if the entire arrangement in the vehicle includes both microphones and loudspeakers, and the voice-controlled input to electrical devices is also carried out via this. Feedback and the resulting overloads can cause considerable malfunctions and misinterpretations of the voice command even with intelligent input interfaces. Depending on the application, this also poses a security risk.
- the simultaneous noise elimination can also be carried out simultaneously.
- the figure shows the basic structure as well as the mode of operation, so that both the procedural measures and the interconnection of the individual elements according to the device can be recognized in their logical entirety from the figure itself.
- the vehicle interior is divided into two subspaces, namely the front and the rear.
- the microphone M 1 picks up the speech signal there and possibly noise signals.
- the noise signal consists of the background noise in the passenger compartment resulting from the operation of the vehicle. These can be engine noises, wind noises and rolling noises, but also acoustic echo signals from the other sub-area and the like.
- the sum signal from speech and noise backdrop contained at M 1 is fed to a first summation point S 1.
- This summation point is then also a correspondingly processed signal from a acoustic model AM 1 in front.
- the subtraction signal generated in the acoustic model AM 1 originates from the signal already received in the rear part of the vehicle and already frequency-shifted.
- AM 2 represents the acoustic model for the rear compartment of the passenger compartment.
- the transmission of a voice message from the rear compartment of the passenger cell via M 2 to the front compartment of the passenger cell via L 2 takes place in an analogous manner.
- the microphone M 2 registers the voice message together with the background noise in the rear compartment of the passenger compartment and transmits it to the summation point S 2, at which the overall acoustic signal recorded via M 1, i.e. the echo and background noise, is subtracted.
- the echo-free signal generated in this way by the microphone M 2 is then likewise fed to a frequency shifting device F 2, which in turn carries out a frequency shift by an amount ⁇ F.
- ⁇ F for example 5 Hz.
- the result or the signal processed in this way is in turn fed to the front compartment of the passenger compartment, namely the loudspeaker L 2 positioned there.
- the frequency shift for the transmission from front to back can also be differentiated from that frequency shift from back to front.
- noise signal subtraction is also added. This can be taken into account in a suitable manner in the respective acoustic models AM1 and AM 2.
- the further components necessary for this, such as noise signal microphones, are not shown further.
- each acoustic input signal from M 1 and also from M 2, before it is further processed and fed to the loudspeakers L 2 and L 1, is composed of echo and other noises
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)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Circuit For Audible Band Transducer (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19820000 | 1998-05-06 | ||
DE19820000 | 1998-05-06 | ||
DE19827134 | 1998-06-18 | ||
DE19827134A DE19827134A1 (de) | 1998-05-06 | 1998-06-18 | Verfahren und Einrichtung zum Betrieb von sprachunterstützten Systemen in Kraftfahrzeugen |
PCT/EP1999/003031 WO1999057938A1 (de) | 1998-05-06 | 1999-05-04 | Verfahren und einrichtung zum betrieb von sprachunterstützten systemen in kraftfahrzeugen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1077013A1 true EP1077013A1 (de) | 2001-02-21 |
EP1077013B1 EP1077013B1 (de) | 2002-03-06 |
Family
ID=26045962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99924872A Expired - Lifetime EP1077013B1 (de) | 1998-05-06 | 1999-05-04 | Verfahren und einrichtung zum betrieb von sprachunterstützten systemen in kraftfahrzeugen |
Country Status (5)
Country | Link |
---|---|
US (1) | US7010129B1 (de) |
EP (1) | EP1077013B1 (de) |
JP (1) | JP2002514775A (de) |
ES (1) | ES2174611T3 (de) |
WO (1) | WO1999057938A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7467084B2 (en) | 2003-02-07 | 2008-12-16 | Volkswagen Ag | Device and method for operating a voice-enhancement system |
US7760889B2 (en) | 2004-08-10 | 2010-07-20 | Volkswagen Ag | Speech support system for a vehicle |
US7912228B2 (en) | 2003-07-18 | 2011-03-22 | Volkswagen Ag | Device and method for operating voice-supported systems in motor vehicles |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3886391B2 (ja) * | 2002-02-15 | 2007-02-28 | シャープ株式会社 | カード型装置、及び、それを備えた電子機器 |
US8537030B2 (en) * | 2010-02-15 | 2013-09-17 | Ford Global Technologies, Llc | Pedestrian alert system and method |
US9628930B2 (en) | 2010-04-08 | 2017-04-18 | City University Of Hong Kong | Audio spatial effect enhancement |
JP6111955B2 (ja) * | 2013-09-27 | 2017-04-12 | アンデン株式会社 | 車両接近通報装置 |
JP6231042B2 (ja) * | 2015-03-24 | 2017-11-15 | 本田技研工業株式会社 | 能動騒音抑制システム、及び車両用能動騒音抑制システム |
US9595253B2 (en) | 2015-03-24 | 2017-03-14 | Honda Motor Co., Ltd. | Active noise reduction system, and vehicular active noise reduction system |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870292A (ja) | 1981-10-22 | 1983-04-26 | 日産自動車株式会社 | 車両用音声認識装置 |
JPH0746791B2 (ja) * | 1985-07-17 | 1995-05-17 | 日本電信電話株式会社 | ハウリング抑圧回路 |
EP0304257A3 (de) | 1987-08-19 | 1989-09-27 | McGregor, Thomas | Sprachverstärkungseinrichtung |
DE3925589C2 (de) * | 1989-08-02 | 1994-03-17 | Blaupunkt Werke Gmbh | Verfahren und Anordnung zur Störbefreiung von Sprachsignalen |
DE4106405C2 (de) | 1990-03-23 | 1996-02-29 | Ricoh Kk | Geräuschunterdrückungseinrichtung für ein Spracherkennungsystem |
GB9026906D0 (en) * | 1990-12-11 | 1991-01-30 | B & W Loudspeakers | Compensating filters |
DE4203436A1 (de) | 1991-02-06 | 1992-08-13 | Koenig Florian | Datenreduzierte sprachkommunikation |
DE4227826C2 (de) | 1991-08-23 | 1999-07-22 | Hitachi Ltd | Digitales Verarbeitungsgerät für akustische Signale |
JP2760373B2 (ja) * | 1995-03-03 | 1998-05-28 | 日本電気株式会社 | 雑音消去装置 |
DE19524847C1 (de) | 1995-07-07 | 1997-02-13 | Siemens Ag | Vorrichtung zur Verbesserung gestörter Sprachsignale |
US5903819A (en) | 1996-03-13 | 1999-05-11 | Ericsson Inc. | Noise suppressor circuit and associated method for suppressing periodic interference component portions of a communication signal |
US5920834A (en) * | 1997-01-31 | 1999-07-06 | Qualcomm Incorporated | Echo canceller with talk state determination to control speech processor functional elements in a digital telephone system |
DE19705471C2 (de) | 1997-02-13 | 1998-04-09 | Sican F & E Gmbh Sibet | Verfahren und Schaltungsanordnung zur Spracherkennung und zur Sprachsteuerung von Vorrichtungen |
US5893056A (en) * | 1997-04-17 | 1999-04-06 | Northern Telecom Limited | Methods and apparatus for generating noise signals from speech signals |
US6098040A (en) * | 1997-11-07 | 2000-08-01 | Nortel Networks Corporation | Method and apparatus for providing an improved feature set in speech recognition by performing noise cancellation and background masking |
-
1999
- 1999-05-04 JP JP2000547814A patent/JP2002514775A/ja active Pending
- 1999-05-04 ES ES99924872T patent/ES2174611T3/es not_active Expired - Lifetime
- 1999-05-04 WO PCT/EP1999/003031 patent/WO1999057938A1/de active IP Right Grant
- 1999-05-04 US US09/674,839 patent/US7010129B1/en not_active Expired - Lifetime
- 1999-05-04 EP EP99924872A patent/EP1077013B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9957938A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7467084B2 (en) | 2003-02-07 | 2008-12-16 | Volkswagen Ag | Device and method for operating a voice-enhancement system |
US7912228B2 (en) | 2003-07-18 | 2011-03-22 | Volkswagen Ag | Device and method for operating voice-supported systems in motor vehicles |
US7760889B2 (en) | 2004-08-10 | 2010-07-20 | Volkswagen Ag | Speech support system for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
ES2174611T3 (es) | 2002-11-01 |
WO1999057938A1 (de) | 1999-11-11 |
US7010129B1 (en) | 2006-03-07 |
EP1077013B1 (de) | 2002-03-06 |
JP2002514775A (ja) | 2002-05-21 |
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