CN109104670A - A kind of audio frequency apparatus and its spatial noise reduction method, system - Google Patents
A kind of audio frequency apparatus and its spatial noise reduction method, system Download PDFInfo
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- CN109104670A CN109104670A CN201810955454.2A CN201810955454A CN109104670A CN 109104670 A CN109104670 A CN 109104670A CN 201810955454 A CN201810955454 A CN 201810955454A CN 109104670 A CN109104670 A CN 109104670A
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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
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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
- H04R2410/00—Microphones
- H04R2410/01—Noise reduction using microphones having different directional characteristics
Abstract
The invention discloses a kind of audio frequency apparatus and its spatial noise reduction methods, system, audio frequency apparatus includes microphone array and trumpet array, microphone array includes multiple the first microphones for being set to different spaces direction, and trumpet array includes multiple the first loudspeaker being arranged in a one-to-one correspondence with the first microphone；This method includes the first voice signal for obtaining each first microphone and being respectively received；First voice signal includes user voice signal and noise sound signal；According to preset sound information and each first voice signal, controls corresponding first loudspeaker and play the inhibition voice signal for being directed to noise sound signal；Inhibiting voice signal includes the reverse phase sound wave for inhibiting corresponding noise sound signal, and preset sound information includes user voice information gathered in advance.The present invention expands the inhibition range of spatial noise in use, enhances noise reduction effect, and also can ensure that the voice signal of user is not suppressed, user-friendly.
Description
Technical field
The present embodiments relate to noise reduction technology field, more particularly to a kind of audio frequency apparatus and its spatial noise reduction method,
System.
Background technique
Everywhere there is noise, such as sound, whistle sound, the construction sound of vehicle driving etc. in people's lives, noise is given
People's lives bring very big puzzlement, will affect human health when serious.With the development of science and technology, active noise reduction techniques are met the tendency of
And give birth to, active noise reduction is to generate the reversed sound wave equal with ambient noise by noise reduction system to offset ambient noise.Currently, existing
It is usually to be made of single microphone and single loudspeaker by the active noise reduction system in technology, it, can only after microphone picks up noise
The reverse phase sound wave opposite with noise phase is issued to offset to noise, still, since noise is being propagated by a loudspeaker
Dispersion can be generated in the process, and noise is frequently not to propagate from a direction, so in the prior art based on single Mike
The noise reduction effect of the active noise reduction system of wind and single loudspeaker is poor, cannot preferably meet user demand.
Summary of the invention
The purpose of the embodiment of the present invention is that a kind of audio frequency apparatus and its spatial noise reduction method, system are provided, in use process
In expand the inhibition range of spatial noise, enhance noise reduction effect, and also can ensure that the voice signal of user is not pressed down
System, offers convenience for user, is conducive to meet user demand.
In order to solve the above technical problems, the embodiment of the invention provides a kind of spatial noise reduction method of audio frequency apparatus, audio
Equipment includes microphone array and trumpet array, and microphone array includes multiple the first Mikes for being set to different spaces direction
Wind, trumpet array include multiple the first loudspeaker being arranged in a one-to-one correspondence with the first microphone；This method comprises:
Obtain the first voice signal that each first microphone is respectively received；First voice signal includes user voice letter
Number and noise sound signal；
According to preset sound information and each first voice signal, controls corresponding first loudspeaker and play for noise sound
The inhibition voice signal of signal；Inhibiting voice signal includes the reverse phase sound wave for inhibiting corresponding noise sound signal, is preset
Acoustic information includes user voice information gathered in advance.
Optionally, audio frequency apparatus further includes the second loudspeaker, and the second loudspeaker are located at trumpet array and microphone array constitutes
The predetermined position of space structure, so that extraneous sound wave is in transmission process preferentially after microphone array and trumpet array
It is transmitted to the second loudspeaker again；
This method further include:
Obtain the audio parameter information of audio file；
The second loudspeaker, which are controlled, according to audio parameter information plays audio sound signal corresponding with audio file.
Second loudspeaker are set to the predetermined position for the space structure that trumpet array and microphone array are constituted by the application,
So that extraneous sound wave is preferentially transmitted to second loudspeaker, energy again in transmission process after microphone array and trumpet array
The audio sound signal for enough ensuring that the second loudspeaker are played is not interfered by noise signal, is conducive to ensure what the second loudspeaker were played
The sound quality of the sound effect of audio sound and entire audio frequency apparatus.
Optionally, the first voice signal further includes audio sound signal；
According to preset sound information and each first voice signal, controls corresponding first loudspeaker and play for noise sound
The process of the inhibition voice signal of signal are as follows:
According to preset sound information, audio parameter information and each first voice signal, controls corresponding first loudspeaker and broadcast
Inhibition voice signal of the widening to noise sound signal.
The application can be realized the identification to user voice signal and audio sound signal, and carry out spatial noise suppression
Inhibited when processed just for noise signal, to avoid weakening useful voice signal in noise suppression process, so as to for
User also can ensure that the life requirement of user while providing quiet living environment, be conducive to the life matter for promoting user
Amount.
Optionally, audio frequency apparatus further includes second microphone, second microphone and the second loudspeaker interval pre-determined distance；
This method further include:
The second sound signal that second microphone receives is obtained, second sound signal includes user voice signal, audio
Voice signal and interference sound signal；
According to preset sound information, audio parameter information and second sound information, controls the second loudspeaker and play for interference
The interference suppression signal of voice signal, interference suppression signal include the reverse phase sound wave for inhibiting interference sound signal.
Received second sound signal is fed back to audio by second microphone and played in circuit by the application, thus
The noise signal of second microphone position is inhibited, to further increase the audio sound message of the second loudspeaker broadcasting
Number audio and audio frequency apparatus overall sound quality.
Optionally, this method further include:
The voice sound signal in noise sound signal is obtained, and extracts the text information in voice sound signal；
Text information is matched with default text information, and controls the first loudspeaker and/or second according to matching result
Loudspeaker issue voice signal corresponding with default text information.
The application is while carrying out spatial noise inhibition, additionally it is possible to some sensitive vocabulary is identified, so that it is guaranteed that user's energy
Enough discovery emergencies in time, so that user takes appropriate measures in time, with further satisfaction user demand.
The embodiment of the invention also provides a kind of audio frequency apparatus, including processing unit and spatial noise reduction structure, spatial noise reductions
Structure includes the microphone array of the input terminal connection of output end and processing unit and the output end of input terminal and processing unit
The trumpet array of connection, so that extraneous sound wave is in transmission process preferentially after microphone array using trumpet array；
Microphone array includes multiple the first microphones for being set to different spaces direction, and trumpet array includes multiple first loudspeaker, respectively
A first microphone is arranged in a one-to-one correspondence with the first loudspeaker；
Each first microphone is respectively used to pick up the first voice signal at respective position, and the first voice signal is sent out
It send to processing unit；
Processing unit obtains and each first sound for being analyzed and processed to each first voice signal received
The corresponding sound wave of signal inhibits signal, and each sound wave inhibition signal is sent to corresponding first loudspeaker；
Each first loudspeaker inhibit signal to play corresponding reverse phase sound wave according to the sound wave being respectively received respectively, to phase
The first voice signal answered is inhibited.
Optionally, microphone array and trumpet array are annular array.
Optionally, audio frequency apparatus further includes the second loudspeaker for playing audio sound signal；Second loudspeaker are located at each
The predetermined position for the space structure that first microphone and each first loudspeaker are constituted, so that extraneous sound wave is in transmission process
Preferentially it is transmitted to the second loudspeaker again after microphone array and trumpet array.
Optionally, audio frequency apparatus further includes second microphone, the interval pre-determined distance of second microphone and the second loudspeaker.
The embodiment of the present invention provides a kind of spatial noise reduction system of audio frequency apparatus accordingly, comprising:
Memory, for storing computer program；
Processor, when for executing computer program the step of the realization such as spatial noise reduction method of above-mentioned audio frequency apparatus.
The embodiment of the invention also provides a kind of computer readable storage medium, it is stored on computer readable storage medium
Computer program, when computer program is executed by processor the step of the realization such as spatial noise reduction method of above-mentioned audio frequency apparatus.
The present invention provides a kind of audio frequency apparatus and its spatial noise reduction method, system, audio frequency apparatus includes microphone array
And trumpet array, microphone array include multiple the first microphones for being set to different spaces direction, trumpet array includes multiple
The first loudspeaker being arranged in a one-to-one correspondence with the first microphone；This method comprises: obtaining what each first microphone was respectively received
First voice signal；First voice signal includes user voice signal and noise sound signal；According to preset sound information and respectively
A first voice signal controls corresponding first loudspeaker and plays the inhibition voice signal for being directed to noise sound signal；Inhibit sound
Signal includes the reverse phase sound wave for inhibiting corresponding noise sound signal, and preset sound information includes user's sound gathered in advance
Message breath.
As it can be seen that the direction in space where each first microphone in the application is different, microphone array is enable to pick up
Voice signal in multiple directions, to expand the spatial dimension of voice pickup, and by receiving to each first microphone
To the first voice signal carry out the first loudspeaker broadcasting that processing control is arranged in a one-to-one correspondence with each first microphone for pressing down
The reverse phase sound wave of corresponding noise sound signal is made, to inhibit to the noise in the multiple directions of space, to expand sky
Between noise inhibition range, enhance noise reduction effect.In addition, in the application when handling each first voice signal,
The user voice signal in each first voice signal can be identified according to preset sound information, and control corresponding
One loudspeaker only play the reverse phase sound wave for noise sound signal, so that it is guaranteed that the voice signal of user is not suppressed, it is user
It offers convenience, is conducive to meet user demand.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow diagram of the spatial noise reduction method of audio frequency apparatus provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of the spatial noise reduction method of another audio frequency apparatus provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of audio frequency apparatus provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of spatial noise reduction structure in Fig. 3；
Fig. 5 is a kind of concrete structure schematic diagram of spatial noise reduction structure in Fig. 3；
Fig. 6 is the structural schematic diagram of another spatial noise reduction structure provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another spatial noise reduction structure provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another spatial noise reduction structure provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another spatial noise reduction structure provided in an embodiment of the present invention；
Figure 10 is the side structure schematic view of Fig. 4；
Figure 11 is a kind of structural schematic diagram of the spatial noise reduction system of audio frequency apparatus provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of audio frequency apparatus and its spatial noise reduction methods, system, expand in use
The inhibition range of spatial noise, enhances noise reduction effect, and also can ensure that the voice signal of user is not suppressed, for
Family offers convenience, and is conducive to meet user demand.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of process signal of spatial noise reduction method of audio frequency apparatus provided in an embodiment of the present invention
Figure.
The audio frequency apparatus includes microphone array and trumpet array, and microphone array includes multiple being set to different spaces side
To the first microphone, trumpet array includes multiple the first loudspeaker being arranged in a one-to-one correspondence with the first microphone；
Wherein, the direction in space difference of each first microphone in microphone array refers to each first microphone
Spatial position distribution can make microphone array realize the voice pickup of multiple directions, and voice pickup range is larger, trumpet array
In the first loudspeaker and microphone array in the first microphone correspond, be not only the one-to-one correspondence of direction in space, and
The noise in the first voice signal that the reverse phase sound wave that first loudspeaker are issued is used to that corresponding first microphone to be inhibited to receive
Voice signal.
The spatial noise reduction method includes:
S110: the first voice signal that each first microphone is respectively received is obtained；First voice signal includes user
Voice signal and noise sound signal；
It is understood that audio frequency apparatus institute includes not only in space noise sound signal, it further include the sound of user
Signal, when extraneous noise sound signal and user voice signal are transferred to the first microphone, each first microphone is picked up
It just include user voice signal and sound message in first voice signal to the first voice signal of respective position
Number.
S120: according to preset sound information and each first voice signal, corresponding first loudspeaker of control are played to be directed to and be made an uproar
The inhibition voice signal of several sound signals；Inhibiting voice signal includes the reverse phase sound for inhibiting corresponding noise sound signal
Wave, preset sound information include user voice information gathered in advance.
It should be noted that illustrating the user when user voice signal and user voice information matches gathered in advance
Voice signal is the sound of " familiar ", will not be inhibited at this time to the sound of " familiar ", to guarantee that user's communication or exchange are suitable
Freely, the application only noise sound signal is inhibited, so as to guarantee user in the case where not by noise jamming into
Row call or exchange, provide good living environment for user.
The embodiment of the present invention is described in detail by taking one of them first voice signal as an example, other each first sound letters
Number treatment process it is all the same, it is specific as follows:
After receiving the first voice signal, first voice signal is known according to user voice information gathered in advance
Not, when identifying in the first voice signal includes user voice signal corresponding with the user voice information gathered in advance,
User voice signal is filtered out from the first voice signal, obtains corresponding noise sound signal, then to the noise sound signal
It is obtained and the noise sound after being handled and (specifically being analyzed parameters such as the frequencies, phase, amplitude of noise sound signal)
The corresponding sound wave of signal inhibits signal, and sound wave inhibition signal is sent to the first loudspeaker corresponding with the first microphone, should
First loudspeaker inhibit signal to play corresponding inhibition voice signal according to the sound wave received, wherein inhibit to wrap in voice signal
Include the reverse phase sound wave for inhibiting noise sound signal, and the reverse phase sound wave preferably with the amplitudes such as noise sound signal, etc.
The sound wave of frequency, antiphase, so as to preferably inhibit corresponding noise sound signal.
Wherein, which is to prestore voiceprint, then according to user voice gathered in advance
When information identifies the first voice signal, by the first voice signal and voiceprint progress sound wave Digital Discrete can be prestored
Point comparison is judged as in the first voice signal when contrast is not less than preset threshold (such as 85%) and includes and default vocal print
The corresponding user voice information of information, the corresponding vocal print of the first voice signal is subtracted and prestores voiceprint, obtained vocal print letter
Breath is that the corresponding voiceprint of noise sound signal obtains so that user voice information be filtered out from the first voice signal
Noise sound signal.
Above-mentioned user voice information gathered in advance specifically can be in a quiet space of comparison to the sound of user
It is acquired, and the voiceprint of the user is stored.
It should also be noted that, since the direction in space where each first microphone in the application is different, so respectively
The acoustic characteristic of first voice signal received by a first microphone is also different, therefore needs through the first loudspeaker pair and its phase
Noise signal in first voice signal received by the first microphone answered is inhibited.That is, to each first sound
It, should be according to the noise sound signal in the first voice signal that n-th of first microphones are sent when sound signal carries out identifying processing
It obtains sound wave and inhibits signal, and sound wave inhibition signal is sent to n-th of first loudspeaker, so that n-th of first loudspeaker foundations
The sound inhibits signal to play and inhibits voice signal.
In addition, the side of parallel processing can be used in the application when being analyzed and processed to each first voice signal
Formula is handled, to improve processing speed.
As it can be seen that the direction in space where each first microphone in the application is different, microphone array is enable to pick up
Voice signal in multiple directions, to expand the spatial dimension of voice pickup, and by receiving to each first microphone
To the first voice signal carry out the first loudspeaker broadcasting that processing control is arranged in a one-to-one correspondence with each first microphone for pressing down
The reverse phase sound wave of corresponding noise sound signal is made, to inhibit to the noise in the multiple directions of space, to expand sky
Between noise inhibition range, enhance noise reduction effect.In addition, in the application when handling each first voice signal,
The user voice signal in each first voice signal can be identified according to preset sound information, and control corresponding
One loudspeaker only play the reverse phase sound wave for noise sound signal, so that it is guaranteed that the voice signal of user is not suppressed, it is user
It offers convenience, is conducive to meet user demand.That is, the application can not only expansion space noise inhibition range, enhancing drop
It makes an uproar effect, additionally it is possible to avoid the sound to " familiar " from inhibiting, bring biggish convenience for the use of user, be conducive to improve
User's quality of life.
Referring to figure 2., Fig. 2 is a kind of process signal of spatial noise reduction method of audio frequency apparatus provided in an embodiment of the present invention
Figure.
The audio frequency apparatus further includes the second loudspeaker, and the second loudspeaker are located at the space knot that trumpet array and microphone array are constituted
The predetermined position of structure, so that extraneous sound wave preferentially passes after microphone array and trumpet array again in transmission process
To the second loudspeaker；
It should be noted that second loudspeaker are for playing audio sound signal.Due in noise transmittance process
It can be picked up by the first microphone in microphone array, and play reverse phase sound wave by corresponding first loudspeaker and noise is pressed down
System, so noise can be weakened in transmittance process, therefore the noise at the position on noise direction of transfer far from noise source compared with
It is weak, so in order to ensure the audio sound signal that the second loudspeaker are played is not interfered by noise signal, second in the present embodiment
Position of the loudspeaker in the spatial noise reduction structure that microphone array and trumpet array are constituted should make extraneous sound wave in transmission process
In be preferentially transmitted to the second loudspeaker again after microphone array and trumpet array, to ensure the audio sound that is played of the second loudspeaker
Sound effect and entire audio frequency apparatus sound quality.
Wherein, the predeterminated position of the application can be determined according to the specific structure of microphone array and trumpet array,
It, should such as when microphone array and trumpet array are circular array, and trumpet array is located at the inside of microphone array
Predeterminated position can be the center position of trumpet array.
The spatial noise reduction method can also include:
S210: the audio parameter information of audio file is obtained；
Specifically, obtaining the audio parameter information of played audio file, the audio when needing to play audio file
Parameter information is specially the characteristic parameters information such as corresponding with audio file voice codec information, including frequency, amplitude, phase,
Each audio file has and its unique corresponding audio parameter information.Audio file be, for example, music file, etc..
S220: the second loudspeaker are controlled according to audio parameter information and play audio sound signal corresponding with audio file；
For example, when audio file is music file, it can be according to audio parameter information control corresponding with the music file
It makes the second loudspeaker and plays corresponding music.
S230: the first voice signal that each first microphone is respectively received is obtained；First voice signal includes user
Voice signal, noise sound signal and audio sound signal；
Specifically, when the second loudspeaker play audio file, in the first voice signal that each first microphone receives
Other than user voice signal and noise sound signal further include audio frequency apparatus itself play audio sound signal (for example,
Music sound signal).Wherein, step S210 and S220 can be executed before step S210.
S240: according to preset sound information, audio parameter information and each first voice signal, corresponding first loudspeaker is controlled
Broadcasting is directed to the inhibition voice signal of noise sound signal, wherein inhibiting voice signal includes for inhibiting corresponding noise
The reverse phase sound wave of voice signal, preset sound information include user voice information gathered in advance.
It should be noted that the application can not only identify the sound letter of " familiar " when inhibiting to spatial noise
Number, additionally it is possible to identify audio sound signal from each first voice signal when playing audio file, and by user voice
Signal and audio sound signal are filtered out from the first voice signal, obtain noise sound signal, then control corresponding first again
Loudspeaker play the inhibition voice signal for being directed to noise sound signal.Can be realized in the present embodiment to useful voice signal (
That is user voice signal and audio sound signal) identification, and when carrying out spatial noise inhibition just for noise signal into
Row inhibits, to avoid weakening useful voice signal in noise suppression process, namely is providing quiet life for user
The life requirement that also can ensure that user while environment is conducive to the quality of life for promoting user.
Specifically, according to preset sound information and audio parameter information can be identified from each first voice signal with
The user voice signal of the preset sound information matches, and identify audio sound signal corresponding with audio parameter information.
Wherein, the introduction in above-mentioned S120 can be found in the specific identification process of user voice, the embodiment of the present invention is no longer described in detail, to sound
The identification of frequency voice signal, since audio sound signal is that the second loudspeaker in audio frequency apparatus play, so can according to
The corresponding audio parameter information of audio file identifies audio sound signal from the first noise signal.
It is understood that in specific identification can first to one in user voice signal and audio sound signal into
After row identification, then another is identified, can also be identified simultaneously, concrete mode the application is without limitation.
Further, which further includes second microphone, second microphone and the second loudspeaker interval pre-determined distance；
Wherein, which can be in 5mm between 3cm, to ensure the eardrum of second microphone no longer the second loudspeaker
It shakes in stroke range, keeps the music sound signal in voice signal acquired in second microphone undistorted.
Correspondingly, the spatial noise reduction method further include:
The second sound signal that second microphone receives is obtained, second sound signal includes user voice signal, audio
Voice signal and interference sound signal；
According to preset sound information, audio parameter information and second sound information, controls the second loudspeaker and play for interference
The interference suppression signal of voice signal, interference suppression signal include the reverse phase sound wave for inhibiting interference sound signal.
It is understood that second microphone setting is being spaced at the second loudspeaker pre-determined distance and is picking up its position
Second sound signal, include the use that the music sound signal that plays of the second loudspeaker, extraneous transmitting come in the second sound signal
Family voice signal and interference sound signal in predetermined position, and by by second sound signal audio play in circuit into
Row feeds back the purpose to realize audio enhancing and noise suppressed to the audio sound signal of broadcasting, is conducive to further increase sound
The overall sound quality of effect and audio frequency apparatus that frequency plays.
Specifically, the second sound signal that second microphone is picked up according to preset sound information and audio parameter information into
Row identification can recognize that user voice information (the user voice information and preset sound information in second sound information
With) and audio parameter information, then again by second sound information user voice information and audio parameter information filter out, energy
Remaining interference sound signal is accessed, and the second loudspeaker are controlled according to the interference sound signal and play interference suppression signal, with
It will pass through corresponding reverse phase sound wave to inhibit interference sound signal.Wherein, the interference sound signal in the embodiment of the present invention
Including the remaining noise sound signal after the inhibition of the first loudspeaker.
Audio sound signal is played by the way of time-sharing multiplex and is done it should also be noted that, can control the second loudspeaker
Inhibition signal is disturbed, the corresponding reverse phase sound wave of interference suppression signal is also inserted into the wave of audio sound signal according to predeterminated frequency
In shape, wherein predeterminated frequency is not less than 20KHz, thus guarantee that human ear is detectable " intermittent " of audio sound signal, with
Guarantee audio.
Further, the spatial noise reduction method further include:
The voice sound signal in noise sound signal is obtained, and extracts the text information in voice sound signal；
Text information is matched with default text information, and controls the first loudspeaker and/or second according to matching result
Loudspeaker issue voice signal corresponding with default text information.
It is understood that can be potentially encountered emergency case in real life, and there can be packet in ambient enviroment
The acoustic information for including some urgent texts, the acoustic information for example including the urgent text such as " kindling ", " help ", in order to allow user
Extraneous these acoustic informations with urgent text transmitted can be heard indoors, and the embodiment of the present invention can also obtain noise
Speech sound information in voice signal, and corresponding text information is extracted from speech sound information, by what is extracted
Text information is matched with pre-stored default text information (such as " kindling ", " help " etc.), can when successful match
Voice signal corresponding with the text information of successful match is played to control the first loudspeaker and/or the second loudspeaker, so as to user's energy
It is enough to hear related text information in time, and take corresponding Strategies for action.The present embodiment while carrying out spatial noise inhibition,
Some sensitive vocabulary can be identified, so that it is guaranteed that user can have found emergency in time, so that user can take phase in time
The measure answered, with further satisfaction user demand.
Referring to figure 3., Fig. 3 is a kind of structural schematic diagram of audio frequency apparatus provided in an embodiment of the present invention.In above-mentioned audio
On the basis of the spatial noise reduction embodiment of the method for equipment, the embodiment of the invention also provides a kind of audio frequency apparatuses, for realizing upper
State the method in embodiment of the method.The equipment includes processing unit 1 and spatial noise reduction structure 2, and spatial noise reduction structure 2 includes output
The loudspeaker for holding the microphone array 21 connecting with the input terminal of processing unit 1 and input terminal to connect with the output end of processing unit 1
Array 22, so that extraneous sound wave is in transmission process preferentially after microphone array 2 using trumpet array 22；Mike
Wind array 21 includes multiple the first microphones 211 for being set to different spaces direction, and trumpet array 22 includes multiple first loudspeaker
221, each first microphone 211 is arranged in a one-to-one correspondence with the first loudspeaker 221；
Each first microphone 211 is respectively used to pick up the first voice signal at respective position, and the first sound is believed
Number it is sent to processing unit 1；
Processing unit 1 obtains and each first sound for being analyzed and processed to each first voice signal received
The corresponding sound wave of sound signal inhibits signal, and each sound wave inhibition signal is sent to corresponding first loudspeaker 221；
Each first loudspeaker 221 inhibit signal to play corresponding reverse phase sound wave according to the sound wave being respectively received respectively, with
Corresponding first voice signal is inhibited.
It should be noted that due to when inhibiting to noise, needing first to receive noise then could be according to receiving
Noise issue inhibit the noise sound wave, so the structure between the microphone array 21 in the application and trumpet array 22 is closed
System, which needs to meet, makes extraneous sound wave in transmission process preferentially after microphone array 2 using trumpet array 22.That is,
The first microphone 211 in microphone array 21 should be located at the front of corresponding first loudspeaker 221, and the first loudspeaker 221 are opposite
It is farther from noise source in corresponding first microphone 211, so as to so that the first microphone 211 receives the first voice signal
Afterwards, processing unit 1 can control the first loudspeaker 221 according to first voice signal and issue corresponding reverse phase sound wave, to the
One voice signal is reversely inhibited.
Specifically, the direction in space of each first microphone 211 in microphone array 21 in the application is different, namely
The spatial position of each first microphone 211 is distributed difference, and microphone array 21 can be made to realize the voice pickup of multiple directions,
Voice pickup range is larger.The first loudspeaker 221 in trumpet array 22 and the first microphone 211 in microphone array 21 are one by one
It is correspondingly arranged, so that the reverse phase sound wave for enabling each first loudspeaker 221 to be issued receives corresponding first microphone 211
The first voice signal inhibited, keep the inhibition range of spatial noise larger.
For example, each first microphone 211 in microphone array 21 forms ball array, in corresponding trumpet array 22
Each first loudspeaker 221 also form ball array, and trumpet array 22 is located at the inside of microphone array 21, so as to
Make extraneous sound wave in transmission process preferentially after microphone array 2 using trumpet array 22.
It should also be noted that, the processing unit 1 in the embodiment of the present invention is to each first voice signal received
It is analyzed and processed and (specifically the parameters such as the frequency, phase, amplitude of the first voice signal is analyzed), obtained and each first
The corresponding sound wave of voice signal inhibits signal, and inhibits signal to control corresponding first loudspeaker 221 according to each sound wave and send out
The process of corresponding reverse phase sound wave may refer to the spatial noise reduction embodiment of the method for above-mentioned audio frequency apparatus out, and the application is herein no longer
It repeats.
In addition, the audio frequency apparatus in the application can be placed on the path that noise transmits in use, such as work as window
When noise reaches interior after outer, which can be placed at window, to carry out noise reduction to the noise transmitted outside window
Processing reduces influence of the noise to indoor environment.
Specifically, the processing unit 1 in the application may include FPGA board, to realize to each first voice signal
Parallel processing, improve processing speed.
- Figure 10 referring to figure 4..Further, the microphone array 21 in the application and trumpet array 22 are circular array
Column.
It should be noted that spatial noise is picked up in multiple directions (360 ° of omnidirections) in order to realize,
Microphone array 21 and trumpet array 22 in the application are both preferably annular array, so as to realize to the full side in 360 ° of space
Upward noise carries out noise reduction process, greatly improves noise reduction range, further increases noise reduction effect.For example, being circular array
(specifically referring to figure 4.), polygon annular array or triangular ring array etc..
Spatial noise reduction structure 2 shown in referring to figure 5., wherein microphone array 21 and trumpet array 22 are circular ring shape
Array.As shown in figure 5, microphone array 21 includes 8 the first microphones 211, respectively MIC1, MIC2, MIC3 ... MIC8, loudspeaker
Array 22 includes 8 the first loudspeaker 221, respectively SPK1, SPK2, SPK3 ... SPK8, it is assumed that noise is by a side accordingly
To transmitting, such as noise is transmitted by the direction of the first microphone MIC2 in Fig. 5, since sound wave is longitudinal wave and Acoustic Wave Propagation can produce
Estranged to dissipate, so MIC2 will pick up noise main lobe first, processing unit 1 controls the first loudspeaker SPK1 according to the noise main lobe and sends out
The noise main lobe is offset for the reverse phase sound wave of the noise main lobe out；Pick up in MIC2 to after noise main lobe, MIC1 and
MIC3 can pick up noise simultaneously and disperse past main lobe and secondary lobe, then send in the first noise signal that will be respectively received
To processing unit 1, processing unit 1 can carry out the analysis of the parameters such as frequency, phase, amplitude according to the waveform received, obtain phase
The sound wave answered inhibits signal, and control SPK1 and SPK3 issues corresponding reverse phase sound wave receives MIC1 and MIC3 the respectively
One voice signal is offset.As it can be seen that noise pass through during transmission MIC1, MIC2 and MIC3 pickup and SPK1,
After the counteracting for the sound wave that SPK2 and SPK3 is issued, noise, which is arbitrarily downgraded, to be reduced rapidly, and remaining noise is equally again by propagation side
The counteracting for the sound wave that the pickup of upward MIC4 and MIC8 and SPK4 and SPK8 are issued, compared to single loudspeaker, the noise reduction system of single Mike
System, the application can be realized the noise pickup and counteracting in 360 ° of space omnidirectional, largely press down to spatial noise
System, greatly improves noise reduction effect.Certainly, when inhibiting to the noise that multiple directions transmit, some direction is passed with above-mentioned
The principle that the noise come is inhibited is identical, and the application is no longer described in detail.
In addition, the microphone array 21 and trumpet array 22 in the application can in the same plane, it can also be in difference
In plane, and microphone array 21 and trumpet array 22 can be with coaxial settings.
Further, audio frequency apparatus further includes the second loudspeaker 3 for playing audio sound signal；Second 3, loudspeaker
In the predetermined position for the space structure that each first microphone 211 and each first loudspeaker 221 are constituted, so that extraneous sound wave
Preferentially it is transmitted to the second loudspeaker 3 again after microphone array 2 and trumpet array 22 in transmission process.
Specifically, the audio frequency apparatus in the application can also be used to play audio sound signal, it specifically can be by the
Two loudspeaker 3 play audio sound signal.Again due in noise transmittance process by the first microphone in microphone array 21
211 pick up, and play reverse phase sound wave by corresponding first loudspeaker 221 and inhibit to noise, so noise is in transmittance process
In can be weakened, therefore on noise direction of transfer far from noise source position at noise it is weaker, so in order to ensure the second loudspeaker
The 3 audio sound signals played are not interfered by noise signal, so the second loudspeaker 3 are in microphone array 21 and trumpet array
Position should make extraneous sound wave in transmission process preferentially by microphone array 2 and loudspeaker in the 22 spatial noise reduction structures 2 constituted
The second loudspeaker 3 are transmitted to after array 22 again.
For example, be annular array in microphone array 21 and trumpet array 22, and in the same plane when, the second loudspeaker
3 can be located at the center position of trumpet array 22.
Wherein, the second loudspeaker 3 play audio sound signal when, processing unit 1 to each first voice signal at
It manages and controls the process that each corresponding first loudspeaker 221 play corresponding reverse phase sound wave and refer in above method embodiment
Relevant portion, details are not described herein by the application.
Further, audio frequency apparatus further includes second microphone 4, and the interval of second microphone 4 and the second loudspeaker 3 is default
Distance.
Wherein, the relative positional relationship of second microphone 4 and the second loudspeaker 3 is referred to Figure 10, second microphone 4 and
The relative position of two loudspeaker 3 is located at second microphone 4 within the scope of the orthographic projection of second loudspeaker 3, and in the application
Linear distance of the pre-determined distance (DL in Figure 10) between second microphone 4 and the second loudspeaker 3, the pre-determined distance can be
5mm in the eardrum vibration stroke range to ensure no longer the second loudspeaker 3 of second microphone 4, makes second microphone 4 between 3cm
Music sound signal in acquired voice signal is undistorted.
Specifically, second microphone 4 and the second loudspeaker 3 can be respectively positioned on the public of microphone array 21 and trumpet array 22
On axis, and second microphone 4 and the second loudspeaker 3 are spaced pre-determined distance.
Wherein, the partial structural diagram in the audio frequency apparatus in the application is shown in Fig. 6-Figure 10 as shown in Fig. 6-Figure 10
The distribution relation of several second loudspeaker 3, second microphone 4, microphone array 21 and trumpet array 22 is gone out, wherein Fig. 6, Fig. 7
It is in the same plane with microphone array 21 shown in Figure 10 and trumpet array 22, and structural schematic diagram shown in Fig. 10 is
Microphone array 21 and trumpet array 22 shown in the side view of structural schematic diagram shown in Fig. 4, Fig. 8 and Fig. 9 are located at difference
Plane.
Certainly, stereo set provided by the embodiment of the present invention and its spatial noise reduction structure 2 are not limited to shown in figure several
Kind structure can not also do particular determination to this, be able to achieve the purpose of the embodiment of the present invention for other specific structures, the application
?.
As it can be seen that the direction in space at 211 place of each first microphone in the application is different, enable microphone array 21
The voice signal in multiple directions is picked up, to expand the spatial dimension of voice pickup, and by each first microphone
211 the first voice signals received carry out the first loudspeaker that processing control is arranged in a one-to-one correspondence with each first microphone 211
221 play the reverse phase sound wave for inhibiting corresponding noise sound signal, to inhibit to the noise in the multiple directions of space,
To expand the inhibition range of spatial noise, enhance noise reduction effect, there is stronger practicability, and cost compared with
It is low.
On the basis of above method embodiment, Figure 11 is please referred to.The embodiment of the present invention provides a kind of audio accordingly
The spatial noise reduction system of equipment, the system include:
Memory 5, for storing computer program；
Processor 6 realizes the step of the spatial noise reduction method such as above-mentioned audio frequency apparatus when for executing the computer program
Suddenly.
It should be noted that the spatial noise reduction system of audio frequency apparatus provided in the embodiment of the present invention, have with it is above-mentioned
The identical beneficial effect of spatial noise reduction method of audio frequency apparatus provided in embodiment of the method.In addition, implementing for the present invention
The specific introduction of the spatial noise reduction method of involved audio frequency apparatus please refers to above method embodiment in example, and the application is herein
It repeats no more.
On the basis of the above embodiments, the embodiment of the invention also provides a kind of computer readable storage mediums, calculate
It is stored with computer program on machine readable storage medium storing program for executing, realizes when computer program is executed by processor such as above-mentioned audio frequency apparatus
The step of spatial noise reduction method.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In the storage medium of any other forms well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of spatial noise reduction method of audio frequency apparatus, which is characterized in that the audio frequency apparatus includes microphone array and loudspeaker
Array, the microphone array include multiple the first microphones for being set to different spaces direction, and the trumpet array includes more
A the first loudspeaker being arranged in a one-to-one correspondence with first microphone；The described method includes:
Obtain the first voice signal that each first microphone is respectively received；First voice signal includes user's sound
Sound signal and noise sound signal；
According to preset sound information and each first voice signal, controls corresponding first loudspeaker and play for the noise
The inhibition voice signal of voice signal；The inhibition voice signal includes the reverse phase sound for inhibiting corresponding noise sound signal
Wave, the preset sound information include user voice information gathered in advance.
2. the spatial noise reduction method of audio frequency apparatus according to claim 1, which is characterized in that the audio frequency apparatus further includes
Second loudspeaker, second loudspeaker are located at the predeterminated position for the space structure that the trumpet array and the microphone array are constituted
Place so that extraneous sound wave be preferentially transmitted to again after the microphone array and the trumpet array in transmission process it is described
Second loudspeaker；
The method also includes:
Obtain the audio parameter information of audio file；
Second loudspeaker, which are controlled, according to the audio parameter information plays audio sound signal corresponding with the audio file.
3. the spatial noise reduction method of audio frequency apparatus according to claim 2, which is characterized in that first voice signal is also
Including the audio sound signal；
It is described according to preset sound information and each first voice signal, control corresponding first loudspeaker and play for described
The process of the inhibition voice signal of noise sound signal are as follows:
According to preset sound information, the audio parameter information and each first voice signal, corresponding first loudspeaker is controlled
Broadcasting is directed to the inhibition voice signal of the noise sound signal.
4. the spatial noise reduction method of audio frequency apparatus according to claim 3, which is characterized in that the audio frequency apparatus further includes
Second microphone, the second microphone and second loudspeaker interval pre-determined distance；
The method also includes:
The second sound signal that the second microphone receives is obtained, the second sound signal includes the user voice letter
Number, the audio sound signal and interference sound signal；
According to the preset sound information, the audio parameter information and the second sound information, second loudspeaker are controlled
The interference suppression signal for being directed to the interference sound signal is played, the interference suppression signal includes for inhibiting the back drop
The reverse phase sound wave of sound signal.
5. the spatial noise reduction method of audio frequency apparatus according to any one of claims 1-4, which is characterized in that the method
Further include:
The voice sound signal in the noise sound signal is obtained, and extracts the text information in the voice sound signal；
The text information is matched with default text information, and according to matching result control first loudspeaker and/or
Second loudspeaker issue voice signal corresponding with the default text information.
6. a kind of audio frequency apparatus, which is characterized in that including processing unit and spatial noise reduction structure, the spatial noise reduction structure includes
The output end of microphone array and input terminal and the processing unit that output end is connect with the input terminal of the processing unit
The trumpet array of connection, so that extraneous sound wave is in transmission process preferentially after the microphone array using the loudspeaker
Array；The microphone array includes multiple the first microphones for being set to different spaces direction, and the trumpet array includes
Multiple first loudspeaker, each first microphone are arranged in a one-to-one correspondence with first loudspeaker；
Each first microphone is respectively used to pick up the first voice signal at respective position, and first sound is believed
Number it is sent to the processing unit；
The processing unit for being analyzed and processed to each first voice signal received, obtain with it is each described
The corresponding sound wave of first voice signal inhibits signal, and inhibits signal to be sent to corresponding first loudspeaker each sound wave
?；
Each first loudspeaker inhibit signal to play corresponding reverse phase sound wave according to the sound wave being respectively received respectively, to phase
The first voice signal answered is inhibited.
7. audio frequency apparatus according to claim 6, which is characterized in that the microphone array and the trumpet array are
Annular array.
8. audio frequency apparatus described according to claim 6 or 7 any one, which is characterized in that the audio frequency apparatus further includes using
In the second loudspeaker for playing audio sound signal；Second loudspeaker are located at each first microphone and each described first
The predetermined position for the space structure that loudspeaker are constituted, so that extraneous sound wave preferentially passes through the microphone array in transmission process
It is transmitted to second loudspeaker again after column and the trumpet array.
9. audio frequency apparatus according to claim 8, which is characterized in that the audio frequency apparatus further includes second microphone, institute
State the interval pre-determined distance of second microphone Yu second loudspeaker.
10. a kind of spatial noise reduction system of audio frequency apparatus characterized by comprising
Memory, for storing computer program；
Processor realizes the sky of the audio frequency apparatus as described in claim 1 to 5 any one when for executing the computer program
Between noise-reduction method the step of.
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| CN111391771A (en) * | 2020-03-25 | 2020-07-10 | 斑马网络技术有限公司 | Method, device and system for processing noise |
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