KR20100029591A - Speech recognition system of vehicle for using multi microphone - Google Patents

Speech recognition system of vehicle for using multi microphone Download PDF

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Publication number
KR20100029591A
KR20100029591A KR1020080088426A KR20080088426A KR20100029591A KR 20100029591 A KR20100029591 A KR 20100029591A KR 1020080088426 A KR1020080088426 A KR 1020080088426A KR 20080088426 A KR20080088426 A KR 20080088426A KR 20100029591 A KR20100029591 A KR 20100029591A
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KR
South Korea
Prior art keywords
voice
vehicle
microphone
signal
ambient
Prior art date
Application number
KR1020080088426A
Other languages
Korean (ko)
Inventor
안진호
Original Assignee
엘지이노텍 주식회사
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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020080088426A priority Critical patent/KR20100029591A/en
Publication of KR20100029591A publication Critical patent/KR20100029591A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
    • B60R16/0373—Voice control
    • 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
    • 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
    • G10L25/84—Detection of presence or absence of voice signals for discriminating voice from noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor

Abstract

The present invention relates to an in-vehicle speech recognition system using multiple microphones.

The present invention is mounted on a vehicle, a voice microphone mounted on a portion of the vehicle to receive a passenger's voice, and mounted on a portion of the vehicle and mounted so as to be spaced apart from the voice microphone to receive ambient sound and a portion of the vehicle. It provides a voice recognition system in the vehicle using a multiple microphone including a voice source sound extraction unit for removing the ambient noise signal and extracting only the voice signal by receiving the passenger's voice signal and ambient noise signal output from the voice microphone and the ambient sound microphone, respectively do.

Accordingly, the present invention can extract only the voice signal by separating the passenger's voice signal, the wind noise signal, the engine noise signal, and the road noise signal, thereby improving the voice recognition rate.

Description

Speech recognition system of vehicle for using multi microphone

The present invention relates to an in-vehicle speech recognition system using multiple microphones.

In general, the in-vehicle voice recognition system using a single microphone has a problem that the voice recognition rate is lowered due to the inflow of the passenger's voice and ambient noise into a single microphone.

That is, while the vehicle moves, wind noise caused by wind, engine noise caused by engine operation, and road noise caused by road contact are generated.

Therefore, the conventional in-vehicle voice recognition system using a single microphone has a problem that the voice recognition rate is significantly lowered because it is difficult to separate the passenger's voice signal and wind noise signal, engine noise signal, road noise signal.

SUMMARY OF THE INVENTION An object of the present invention is to provide a voice recognition system in a vehicle using multiple microphones that can improve voice recognition rate by extracting only a voice signal by separating a passenger's voice signal, a wind noise signal, an engine noise signal, and a road noise signal. It is in

In order to achieve the above object, the present invention provides a vehicle, a voice microphone mounted on a part of the vehicle to receive a passenger's voice, and an ambient sound microphone mounted on a part of the vehicle and spaced apart from the voice microphone to receive ambient sound. And a voice original sound extracting unit mounted on a portion of the vehicle to receive the voice signal and the ambient noise signal of the occupant respectively output from the voice microphone and the ambient acoustic microphone to remove the ambient noise signal and extract only the voice signal.

According to the in-vehicle speech recognition system using the multiple microphone of the present invention made as described above, the following effects can be obtained.

By separating the passenger's voice signal, the wind noise signal, the engine noise signal, and the road noise signal and extracting only the voice signal, there is an effect of improving the voice recognition rate.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram showing an in-vehicle voice recognition system using multiple microphones according to an embodiment of the present invention, Figure 2 is a block diagram showing an in-vehicle voice recognition system using a multiple microphone according to an embodiment of the present invention to be.

3 is a block diagram illustrating an in-vehicle voice recognition system using multiple microphones according to another embodiment of the present invention, and FIG. 4 shows a state in which the voice microphone and the ambient acoustic microphone shown in FIG. 3 are mounted in a vehicle. It is a plan view for.

1 to 4, in-vehicle voice recognition systems 100, 200, and 300 using multiple microphones according to embodiments of the present invention may include a vehicle 400, a voice microphone 102, and an ambient acoustic microphone 104. , 206, 308, and the original speech extraction unit 110, and the like.

The voice microphone 102 is mounted to a part of the vehicle 400 so as to receive a passenger's voice. In this case, as shown in FIG. 4, the voice microphone 102 may be mounted on a steering wheel of the vehicle 400.

However, the present invention is not limited thereto, and the voice microphone 102 may be mounted on an eye mirror or an instrument panel in proximity to the driver.

The ambient acoustic microphones 104, 206, and 308 are mounted to a portion of the vehicle 400, but are mounted to be spaced apart from the voice microphone 102 to receive ambient sound.

That is, the ambient acoustic microphones 104, 206, and 308 may include any one or two or more of a wind noise recognition microphone, an engine noise recognition microphone, and a road noise recognition microphone.

Hereinafter, for convenience of description, the ambient acoustic microphones 104, 206, and 308 will be divided into wind noise recognition microphones 104, engine noise recognition microphones 206, and road surface noise recognition microphones 308.

In this case, the wind noise recognition microphone 104 may be mounted close to the window of the vehicle 400 and may be mounted close to the rearview mirror.

That is, the wind noise recognition microphone 104 is preferably a position that can recognize the wind noise by the wind while moving.

In addition, the engine noise recognition microphone 206 may be mounted in the engine room of the vehicle 400.

That is, the engine noise recognition microphone 206 is preferably a position that can recognize the engine noise by the operation of the engine.

In addition, the road noise recognition microphone 308 may be mounted on the bottom surface of the vehicle 400.

That is, the road noise recognition microphone 308 is preferably a position that can recognize the road noise due to the road contact.

Meanwhile, a plurality of ambient acoustic microphones 104, 206, and 308 may be mounted to a portion of the vehicle 400 to further reduce ambient noise.

The voice source sound extracting unit 110 is mounted on a part of the vehicle 400 and receives the passenger's voice signal and the ambient noise signal output from the voice microphone 102 and the ambient sound microphones 104, 206, and 308, respectively, and the ambient noise. It is equipped to remove the signal and extract only the voice signal.

Here, the voice source sound extracting unit 110 may be mounted inside the voice microphone 102 and the ambient sound microphones 104, 206, and 308, and the voice microphone 102 and the ambient sound microphones 104, 206, and 308. ) And spaced apart from each other.

In this case, the audio source sound extracting unit 110 may include an analog / digital (A / D) converter 110a and a noise signal filtering unit 110b.

The analog-to-digital converter 110a is provided to convert the passenger's voice signal and the ambient noise signal into a digital signal, and the noise signal filtering means 110b is the passenger's voice signal digitally processed by the analog-to-digital converter 110a. And receiving the ambient noise signal to remove the ambient noise signal.

That is, the noise signal filtering means 110b is provided to cancel the input pulse of the ambient noise signal digitally processed by the analog-digital converter 110a and to supply only the input pulse of the voice signal.

As such, the in-vehicle voice recognition system 100, 200, 300 using multiple microphones according to embodiments of the present invention includes a separate voice microphone 102 and an ambient acoustic microphone 104, 206, 308, A voice original sound extraction unit 110 is included.

Therefore, the in-vehicle speech recognition system 100, 200, 300 using multiple microphones according to the embodiments of the present invention separates the passenger's voice signal, the wind noise signal, the engine noise signal, the road noise signal, and extracts only the voice signal. The voice recognition rate can be improved.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is a block diagram showing an in-vehicle speech recognition system using multiple microphones according to an embodiment of the present invention.

2 is a block diagram showing an in-vehicle voice recognition system using multiple microphones according to another embodiment of the present invention.

3 is a block diagram showing an in-vehicle speech recognition system using multiple microphones according to another embodiment of the present invention.

4 is a plan view illustrating a state in which the voice microphone and the ambient acoustic microphone shown in FIG. 3 are mounted in a vehicle;

Description of the main parts of the drawing

100, 200, 300: voice recognition system 102: voice microphone

104: wind noise recognition microphone 110: original sound extraction unit

110a: A / D Converter

110b: noise signal filtering means 206: engine noise recognition microphone

308: road noise recognition microphone 400: vehicle

Claims (7)

Vehicle A voice microphone mounted on a part of the vehicle and receiving a passenger's voice; An ambient acoustic microphone mounted on a portion of the vehicle and mounted to be spaced apart from the voice microphone to receive ambient sound; A plurality of audio original sound extracting units mounted on a portion of the vehicle to receive the passenger's voice signal and the ambient noise signal respectively output from the voice microphone and the ambient acoustic microphone to remove the ambient noise signal and extract only the voice signal; In-vehicle voice recognition system using microphone. The method of claim 1, The voice original sound extraction unit, An analog / digital converter for converting the passenger's voice signal and the ambient noise signal into a digital signal; And a noise signal filtering means for receiving the passenger's voice signal and the ambient noise signal digitally processed by the analog-to-digital converter and removing the ambient noise signal. The method of claim 1, The voice microphone is in-vehicle voice recognition system using multiple microphones, characterized in that mounted on the steering wheel of the vehicle. The method of claim 1, The ambient acoustic microphone is in-vehicle voice recognition system using a multiple microphone, characterized in that any one or more of wind noise recognition microphone, engine noise recognition microphone, road noise recognition microphone. The method of claim 4, wherein The wind noise recognition microphone is in-vehicle voice recognition system using multiple microphones, characterized in that mounted close to the window of the vehicle. The method of claim 4, wherein The engine noise recognition microphone is an in-vehicle voice recognition system using multiple microphones, characterized in that mounted to the engine room of the vehicle. The method of claim 4, wherein The road noise recognition microphone is an on-vehicle voice recognition system using multiple microphones, characterized in that mounted on the bottom surface of the vehicle.
KR1020080088426A 2008-09-08 2008-09-08 Speech recognition system of vehicle for using multi microphone KR20100029591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080088426A KR20100029591A (en) 2008-09-08 2008-09-08 Speech recognition system of vehicle for using multi microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080088426A KR20100029591A (en) 2008-09-08 2008-09-08 Speech recognition system of vehicle for using multi microphone

Publications (1)

Publication Number Publication Date
KR20100029591A true KR20100029591A (en) 2010-03-17

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KR1020080088426A KR20100029591A (en) 2008-09-08 2008-09-08 Speech recognition system of vehicle for using multi microphone

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9870770B2 (en) 2014-11-10 2018-01-16 Hyundai Motor Company Voice recognition device and method in vehicle
US10762897B2 (en) 2016-08-12 2020-09-01 Samsung Electronics Co., Ltd. Method and display device for recognizing voice

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9870770B2 (en) 2014-11-10 2018-01-16 Hyundai Motor Company Voice recognition device and method in vehicle
US10762897B2 (en) 2016-08-12 2020-09-01 Samsung Electronics Co., Ltd. Method and display device for recognizing voice

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