CN108538280A - A kind of automobile active noise reduction system, method and mobile terminal - Google Patents
A kind of automobile active noise reduction system, method and mobile terminal Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1783—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
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- G—PHYSICS
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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Abstract
The present invention discloses a kind of automobile active noise reduction system, method and mobile terminal, belongs to automobile noise reduction technical field, system includes being set to multiple vehicle audios in car body and the mobile terminal with vehicle audio data connection, and mobile terminal is configured to：Audio collection module, audio analysis processing module, de-noising signal generation module, de-noising signal output module and de-noising signal output module, audio collection module acquisition noise source of sound is given to audio analysis processing module analyzing processing and obtains noise collection of illustrative plates, de-noising signal generation module generates output de-noising signal according to noise collection of illustrative plates, by by original cured apparatus for processing audio be arranged on the mobile terminal of vehicle audio data connection, de-noising signal is obtained by mobile terminal, then utilize the data connection technology between existing mobile terminal and sound equipment, above-mentioned de-noising signal is back to vehicle audio, realize vehicle body noise reduction, using flexible, noise reduction is convenient, the automobile mounted sound equipment use for being not installed with noise reduction system can be directed to.
Description
Technical field
The present invention relates to automobile noise reduction technical fields, more specifically, it relates to a kind of automobile active noise reduction system, method
And mobile terminal.
Background technology
The noise of automobile mostlys come from that road is made an uproar, tire is made an uproar, wind is made an uproar and several aspects such as engine noise, in automobile bodies
Noise control is a part critically important in automotive engineering, and especially controlling all vehicle cabin noise Advanced Sedan Car has very
High requirement.And in the prior art, the noise suppression in automobile bodies is mainly the damping by improving compartment leakproofness, chassis
System, the soundproof effect of enging cabin and the mute tire of selection etc..Above-mentioned technology belongs to passive noise reduction technology, really can
The noise decibel in compartment, but the limitation of its noise reduction are reduced, especially in galloping, the noise in compartment is still
It is so very strong.
It is directed to the above problem, the China that number of patent application is CN00103419.7 and CN201410364521.5 is specially
Profit proposes a kind of noise control system for vehicles and a kind of active noise reducing device suitable for automobile respectively, solves above-mentioned skill
The juche idea of art problem is roughly the same, i.e., by noise signal in Noise Acquisition microphone collecting vehicle, noise reduction chip is divided
Analysis handles noise signal and generates the de-noising signal with noise reverse phase, and de-noising signal is output to automobile through de-noising signal output interface
Sound equipment is amplified, and is overlapped counteracting with internal car noise signal, is achieved the purpose that noise reduction with this.
Above-mentioned solution is mainly shown as that existing vehicle-mounted noise reduction system is whole in practice there is also many shortcomings
The configuration of right very high but acoustic treater is relatively low, extremely limited for the processing capacity of complex environment noise, and reaction is slow, when response
Between it is long, cause treatment effect bad, and promote the cost that above-mentioned processor performance then necessarily increases entire car audio system.
Also, the noise signal analysis processing in above-mentioned solution must be by means of at the microphone and data that are set on car body
It manages the devices such as chip to realize, lacks the interface of connection external noise reduction equipment, using limitation, be mounted with sound equipment still not some
There is the car body for installing above-mentioned denoising device, it is clear that realize that noise reduction is very difficult.For some vehicles with decrease of noise functions
Sound equipment is carried, usually the music stored in users' mobile end is played with the mobile terminal data connection of user when vehicle audio works, broadcasts
The quality put and the data processing chip performance being solidificated in vehicle audio are closely bound up, and with the data processing performance of mobile terminal
It is unrelated, though which results in the configuration of mobile terminal again high influence due to internal car noise if vehicle audio can not be utilized to play
Go out the music of high quality.In above-mentioned technical proposal, the acquisition position of the position of microphone, i.e. sound is fixed, and in car body
The position of portion personnel, the more especially car body with larger space, personnel positions are relatively movable, i.e., when the position of personnel
When changing, therefore the noise reduction region of above-mentioned technical proposal can't follow variation, can not targetedly make in car body
Owner can there are one comfortable environment of quietly riding.
Invention content
It is high for automobile noise reduction conformity of system in practice, application extension limitation, and noise reduction region cannot be according to people
Member position flexibly changes this problem, and the object of the invention one is to propose a kind of automobile active noise reduction system, utilizes external
The sampling and data analysis of internal car noise are realized in mobile terminal, and the data processor carried using mobile terminal obtains opposite in phase
The transmission of above-mentioned de-noising signal is then given to car body sound equipment by de-noising signal, and the power amplifier through automobile audio is amplified, with car
Noise signal is overlapped counteracting, realizes interior decrease of noise functions.Concrete scheme is as follows：
A kind of automobile active noise reduction system, including at least one vehicle audio for being set in car body and with the vehicle audio
The mobile terminal of data connection；
The mobile terminal includes：
Audio collection module is configured for the noise source of sound of acquisition vehicle body, output noise audio signal；
Audio analysis processing module is configured to connect with the audio collection module signal, for receiving the noised audio letter
Number and analyze noise spectrum is calculated；
De-noising signal generation module is configured to the audio analysis processing module data connection, reception and according to the noise
Frequency spectrum generates the de-noising signal for inhibiting noise of and phase identical as the noise frequency and amplitude difference 180 degree；
De-noising signal output module, be configured to the vehicle audio data connection, receive the de-noising signal and output it
It is played out to vehicle audio.
Through the above technical solutions, the audio collection module carried using mobile terminal, such as microphone acquire vehicle body
Noise source of sound, and using mobile terminal carry processor be pocessed so that the data of above-mentioned automobile active noise reduction system
Processing capacity can be guaranteed, and use is more flexible, and control is facilitated to access.Since mobile terminal is not solidificated in car body, move
Moved end can voluntarily acquire the noise source of sound of vehicle body any position according to the setting of user, it is possible thereby to targetedly reduce
The noise of user at one's side, noise reduction are more targeted.Meanwhile audio analysis processing module and de-noising signal generation module being configured
Onto mobile terminal, de-noising signal is exported with normal sound equipment broadcast mode to sound equipment through mobile terminal, mode is simple and reliable so that
Above-mentioned mobile terminal can be suitable for the automobile of current all included sound equipments, can make the automobile of no decrease of noise functions that can have
There are decrease of noise functions, entire automobile active noise reduction system that there is very strong applicability.
Further, the de-noising signal output module includes：
Sound equipment matching module, for detecting the transmission range between the mobile terminal and each vehicle audio；
Sound equipment selecting module, according to the transmission range, matching connection is with the mobile terminal apart from nearest vehicle audio.
Through the above technical solutions, since mobile terminal is movable, position changes with user, therefore, above-mentioned skill
Art scheme enables to mobile terminal to be connect with the vehicle audio away from nearest neighbours so that the vehicle audio drop nearest apart from user
Effect of making an uproar is best, and noise reduction is more targeted, can be given to vehicle body one peace and quiet of all users and comfortably drive environment.
Further, the mobile terminal includes：
Car body information storage module, for storing car body information and benchmark noise reduction information corresponding with the car body information；
Car body information identification module is connect with the audio analysis processing module and car body information storage module signal, according to
Car body noise spectrum identifies car body information, obtains the corresponding benchmark noise reduction information of the car body information；
Car body information collecting device, for acquiring car body information and exporting to the car body information storage module, including man-machine friendship
Mutual module and/or automatically enter module, wherein
Human-computer interaction module, including human-computer interaction interface are used for the input marking car body information according to user and export to described
Car body information storage module；
Module is automatically entered, is connect with the audio analysis processing module signal, the noise spectrum of car body is received, with described
Noise spectrum is marked car body and exports to car body information storage module.
Through the above technical solutions, being directed to each car body storage targetedly as the benchmark noise reduction of noise reduction algorithm class is believed
Breath can make mobile terminal quickly adapt to and in response to the noise circumstance of the car body, shorten using said reference noise reduction information
The time of response.By car body information there are mobile terminal, after when mobile terminal, detection recognizes above-mentioned car body information, then transfer automatically suitable
Together in the benchmark noise reduction information of the car body, shorten the response time, meanwhile, a mobile terminal can store the car body letter of multiple car bodies
Breath and corresponding benchmark noise reduction information, have wide range of applications.
Further, the mobile terminal further includes：
Data sharing module is configured to and the audio collection module and at least one adjacent mobile terminal data connection, reception
And the audio analysis processing module of output noise audio signal at least one adjacent mobile terminal is handled；
Data processing module is configured to and the data sharing module and de-noising signal generation module data connection, reception institute
State the de-noising signal of at least one adjacent mobile terminal feedback, and the de-noising signal that it is generated with the de-noising signal generation module
Algorithm couples are set, coupling de-noising signal is generated and exports to the de-noising signal output module.
Through the above technical solutions, when the acquisition of mobile terminal or handling result are there are when deviation, can combine
The data of other mobile terminals are modified so that the filtration result of noise is more preferable.Meanwhile the data connection between ensureing mobile terminal
Under the premise of efficiency, multiple mobile terminals handle data simultaneously, and it includes the data precision, processing time that can also promote data processing
Whole efficiency inside, even if wherein there are one can ensure noise reduction if mobile terminal breaks down.
Further, in the vehicle audio dress is stored configured with the algorithm for storing this car body benchmark noise reduction information
It sets.
Through the above technical solutions, when a new mobile terminal enters vehicle body, needle can be got in advance
For the said reference noise reduction information algorithm of the car body, the response speed of mobile terminal is promoted.
Based on above-mentioned automobile active noise reduction system, the invention also provides a kind of automobile active denoising methods, including：
Establish the data connection between mobile terminal and vehicle audio；
The noise audio signal of vehicle body is acquired by the mobile terminal and is subject to analyzing processing, is generated and the noise frequency
The de-noising signal for inhibiting noise of and phase identical with amplitude difference 180 degree；
Above-mentioned de-noising signal is transmitted to vehicle audio to play out.
It carries out through the above technical solutions, the audio processing operation of noise is moved on mobile terminal, not only makes full use of
The equipment such as the included processor in mobile terminal and microphone, additionally it is possible to promote the treatment effeciency of noise source of sound, while make one
A little vehicle audios for being fitted without audio processing chip can also carry out noise reduction operation, have the ability of noise reduction.
Further, the method further includes,
The distance between mobile terminal and each vehicle audio are detected, according to the distance between mobile terminal and vehicle audio size,
With the vehicle audio nearest apart from the mobile terminal and the mobile terminal data connection.
It is grasped through the above technical solutions, can more accurate noise reduction targetedly be carried out to the different zones in car body
Make, and noise reduction region is mobile terminal region, i.e. user region, thus, it is possible to provide more comfortable driving to the user
Experience.
Further, the method further includes that the mobile terminal storage inside car body information and the car body information correspond to
Benchmark noise reduction information；
Mobile terminal detection identification car body information, the benchmark noise reduction algorithm for being directed to the car body information is transferred according to car body information, is obtained
Take corresponding noise reduction algorithm；
Analyzing processing is carried out to vehicle body noise according to the noise reduction algorithm.
Through the above technical solutions, being previously stored the benchmark noise reduction information for being directed to specific car body, said reference noise reduction
Information can be pre-set, and can also be to be obtained when being used in the car body for the first time by mobile terminal, obtain in storage in advance
Benchmark noise reduction information is stated, the quick response of mobile terminal is contributed to.
Further, the method further includes,
Establish the data connection between each mobile terminal in car body；
Establish the data connection of at least one mobile terminal and vehicle audio in car body；
Pass through the shared noise reduction algorithm for being directed to the car body noise in one of mobile terminal；
By noise audio signal in one of mobile terminal collecting vehicle, and by above-mentioned noise audio signal share to the shifting
Other mobile terminals of moved end data connection carry out data processing；
At least one de-noising signal that each mobile terminal feedback is acquired with vehicle audio data connection mobile terminal, is calculated according to setting
Method couples noise reduction data, obtains coupling de-noising signal；
Above-mentioned coupling de-noising signal is transmitted to vehicle audio to play out.
Through the above technical solutions, interior mobile terminal can be comprehensively utilized, efficiency and the accuracy of calculating are promoted.
Based on above-mentioned automobile active noise reduction system and method, it is whole with movement that the invention also provides a kind of automobile active noise reductions
End, is configured to,
Communication module for establishing data connection between vehicle audio；
The audio collection module of noise source of sound and output noise audio signal for acquiring vehicle body；
The audio analysis processing module of noise spectrum is calculated for receiving the noise audio signal and analyzing；
For identical as the noise frequency and amplitude according to noise spectrum generation and phase difference 180 degree for inhibiting
The de-noising signal generation module of the de-noising signal of noise；
For with vehicle audio data connection, receive the de-noising signal and output this to the noise reduction that vehicle audio plays out
Signal output module；
Audio analysis processing module for receiving simultaneously output noise audio signal at least one adjacent mobile terminal is handled
Data sharing module；
De-noising signal for receiving at least one adjacent mobile terminal feedback, and by itself and the de-noising signal generation module
The de-noising signal of generation is set algorithm couples, generates coupling de-noising signal and exports to the data of the de-noising signal output module
Processing module；
Sound equipment matching module for detecting transmission range between the mobile terminal and each vehicle audio；
For according to the transmission range, sound equipment of the matching connection with the mobile terminal apart from nearest vehicle audio to select mould
Block.
Through the above technical solutions, so that above-mentioned mobile terminal, such as smart mobile phone, automobile noise reduction system can be suitable for,
Reach good noise reduction.
Compared with prior art, beneficial effects of the present invention are as follows：
（1）By being arranged original cured apparatus for processing audio on the mobile terminal of vehicle audio data connection, pass through shifting
Moved end carrys out acquisition noise source of sound and is subject to analyzing processing to it, obtains de-noising signal, then utilizes existing mobile terminal and sound equipment
Between data connection technology, above-mentioned de-noising signal is back to vehicle audio, realizes vehicle body noise reduction, using flexible, drop
It makes an uproar conveniently, the automobile mounted sound equipment use for being not installed with noise reduction system can be directed to；
（2）By the way that sound equipment matching module and sound equipment selecting module are arranged in mobile terminal so that mobile terminal and its distance are nearest
Vehicle audio connection, not only realize the accurate noise reduction for being directed to different location, while can ensure mobile terminal and vehicle-mounted sound
The timeliness of data transmission between sound；
（3）By the way that data sharing module is arranged in mobile terminal, it is capable of the data processed result of each mobile terminal of comprehensive consideration, obtains
To the most accurately de-noising signal, even if wherein there are one can ensure noise reduction if mobile terminal breaks down；
（4）Different benchmark noise reduction information is stored by being directed to different car bodies in vehicle audio and mobile terminal so that
Each mobile terminal for entering car body can get the noise reduction algorithm for being directed to above-mentioned car body at the first time, improve movement
The response efficiency at end；
（5）By the way that noise reduction algorithm etc. to be set in mobile terminal, a mobile terminal can correspond to the vehicle audio of multiple car bodies, together
When one car body vehicle audio can also correspond to multiple mobile terminals, it is applied widely；
（6）By the way that above-mentioned audio analysis processing module, de-noising signal generation module are arranged in mobile terminal so that in the present invention
Noise reduction system and method can be combined with the music player software in mobile terminal, and de-noising signal is directly coupled to music data
In, it is then transmitted further to vehicle audio and is played, the noise in car body is reduced while promoting music quality, and
The quality height of above-mentioned music more depends on the performance of mobile terminal, and vehicle audio performance imitates the bottleneck of sound quality
It should will reduce.
Description of the drawings
Fig. 1 is the overall schematic of present system；
Fig. 2 is the structural framing schematic diagram of the present invention；
Fig. 3 is the functional framework schematic diagram that mobile terminal of the present invention identifies car body information；
Fig. 4 is the functional framework schematic diagram that multiple mobile terminals shared data is handled；
Fig. 5 is the functional framework schematic diagram that mobile terminal generates noise reduction information based on the algorithm that car body stores；
Fig. 6 is the overall flow figure of active denoising method of the present invention；
Fig. 7 is the method schematic diagram that mobile terminal matches vehicle audio；
Fig. 8 is the method schematic diagram that mobile terminal identifies car body acquisition of information noise reduction algorithm；
Fig. 9 is the method schematic diagram that multiple mobile terminals shared data carries out noise data processing.
Reference numeral：100, mobile terminal；110, audio collection module；120, audio analysis processing module；130, noise reduction is believed
Number generation module；140, de-noising signal output module；141, sound equipment matching module；142, sound equipment selecting module；150, car body is believed
Cease memory module；151, car body information identification module；152, car body information collecting device；1520, human-computer interaction module；1521、
Automatically enter module；1601, data sharing module；1602, data processing module；200, vehicle audio；210, algorithm storage dress
It sets；300, bluetooth communication.
Specific implementation mode
It is directed to interior noise, main source has in the vibration of automobile engine, the vibration of tire, vehicle traveling process
Body vibrations caused by air-flow etc., the existing vehicle audio 200 with active noise reduction function are to utilize active noise mostly
Control technology is realized, i.e., generates the reversed sound wave equal with ambient noise by noise reduction system, noise is neutralized, to realize
The effect of noise reduction.
Existing automobile noise reduction system, analysis and processing unit to noise spectrum are generally fixedly disposed in car body
Portion, it cannot neatly be adjusted in processing capacity, and the collected noise of fixed area can only be directed to and analyzed, and
It cannot be adjusted according to the physical location of user, there is significant limitation.In use, above-mentioned noise reduction system can not be applicable in
In the vehicle audio 200 for being not installed with noise reduction process chip, also there is great limitation in the scope of application.
With reference to embodiment and figure, the present invention is described in further detail, but embodiments of the present invention not only limit
In this.
As depicted in figs. 1 and 2, a kind of automobile active noise reduction system, including at least one vehicle-mounted sound for being set in car body
Ring 200 and the mobile terminal 100 with 200 data connection of vehicle audio.Above-mentioned vehicle audio 200 is configured in each in car body
Position, such as vehicle-mounted circular stereo system.
For mobile terminal 100, include mainly：Audio collection module 110, audio analysis processing module 120, de-noising signal life
At module 130, de-noising signal output module 140 and de-noising signal output module 140.
Audio collection module 110 is configured for the noise source of sound of acquisition vehicle body, output noise audio signal.At this
In invention, above-mentioned audio collection module 110 includes the microphone being set on mobile terminal 100 or connects with 100 signal of mobile terminal
The separate microphone connect.
Audio analysis processing module 120 is configured to connect with 110 signal of audio collection module, for receiving noised audio letter
Number and analyze noise spectrum is calculated.During noise analysis is handled, it should be understood that have and identify non-noise frequency spectrum
Process, i.e., when handling noise retain source of sound in original effective audio, such as passenger sound.Since the above sound is filtered
Wave technology is very existing, repeats no more in the present invention.
De-noising signal generation module 130 is configured to 120 data connection of audio analysis processing module, reception and according to noise
Frequency spectrum generates the de-noising signal for inhibiting noise of and phase identical as noise frequency and amplitude difference 180 degree.
De-noising signal output module 140 is configured to simultaneously output it with 200 data connection of vehicle audio, reception de-noising signal
It is played out to vehicle audio 200.
In the present invention, above-mentioned mobile terminal 100 includes smart mobile phone, Intelligent flat, has language process function and information
The equipment such as the MP4/MP5D of interactive function.In the prior art, vehicle audio 200 usually has the function of Bluetooth communication, above-mentioned to set
It is standby can easily with 200 data connection of vehicle audio.In the present invention, de-noising signal output module 140 include with it is vehicle-mounted
The bluetooth communication 300 that sound equipment bluetooth matches, for the mobile terminals such as smart mobile phone 100, above-mentioned bluetooth communication 300 is
For standard configuration.
In the present invention, above-mentioned audio analysis processing module 120, the function of de-noising signal generation module 130 are except independent collection
It except in mobile terminal 100, can also be integrated in existing music player software, utilize the data output of playout software
As treated de-noising signal delivery outlet.The advantage of above-mentioned configuration is, when user is utilizing the broadcasting built in mobile terminal 100
When software plays music, noise reduction can also be carried out, since de-noising signal and music data blend so that playout software output
Music data inherently has the function of noise reduction, and the processing procedure of above-mentioned noise reduction is in mobile terminal 100 rather than vehicle-mounted
It is carried out in sound equipment 200, the quality of processing is not limited by 200 performance of vehicle audio.
In the present invention, further include sound equipment matching module 141 and sound equipment selection for de-noising signal output module 140
Module 142.Since the quantity of vehicle audio 200 has multiple, and the noise of each position of vehicle body is different from, according to list
One 110 acquisition noise source of sound of audio collection module, it is clear that there is limitation.
The sound equipment matching module 141 is used to detect the transmission range between mobile terminal 100 and each vehicle audio 200.
The sound equipment selecting module 142 is according to transmission range, and matching connection is with mobile terminal 100 apart from nearest vehicle audio
200。
Since mobile terminal 100 is movable, position changes with the change in location of user, therefore, based on above-mentioned
Technical solution enables to mobile terminal 100 to be connect with the vehicle audio 200 away from nearest neighbours so that the vehicle nearest apart from user
Load 200 noise reduction of sound equipment is best, and noise reduction is more targeted, can be given to vehicle body one peace and quiet of all users and comfortably drive
Multiplication ring border.Above-mentioned sound equipment matching module 141 be mainly used for measure the distance between mobile terminal 100 and vehicle audio 200, it is above-mentioned away from
It can detect to obtain in the connection procedure of Bluetooth data transfer from value.
It is directed to different car bodies, internal noise spectrum and people's is similar in sound, has stronger identifiability, no
Noise caused by same car body has specificity.In view of this, optimization, as shown in figure 3, mobile terminal 100 further includes：Car body
Information storage module 150, car body information collecting device 152, car body information identification module 151.
Car body information storage module 150 is for storing car body information and benchmark noise reduction corresponding with car body information letter
Breath.Car body information identification module 151 connects with the audio analysis processing module 120 and 150 signal of car body information storage module
It connects, according to car body noise spectrum, identifies car body information, obtain the corresponding benchmark noise reduction information of the car body information.Based on above-mentioned
Configuration so that mobile terminal 100 can rapidly identify the benchmark noise reduction information found corresponding to the car body.
Car body information collecting device 152 is for acquiring car body information and exporting to the car body information storage module 150, packet
It includes human-computer interaction module 1520 and/or automatically enters module 1521.
Wherein, human-computer interaction module 1520 includes human-computer interaction interface, for the input marking car body information according to user
And it exports to the car body information storage module 150.Automatically enter module 1521 and 120 signal of audio analysis processing module
Connection, is received the noise spectrum of car body, is marked and is exported to car body information storage to car body with the noise spectrum
Module 150.
Said reference noise reduction information includes the specific noise reduction algorithm for being directed to specific car body noise and being generated.Based on above-mentioned skill
Art scheme is directed to each car body storage targetedly such as the benchmark noise reduction information of noise reduction algorithm class, is dropped using said reference
Information of making an uproar can make mobile terminal 100 quickly adapt to and in response to the noise circumstance of the car body, shorten the time of response（It is existing
Algorithm be mostly adaptive algorithm, need a period of time adapted to then generate accurate response）.Car body information is existed and is moved
The benchmark noise reduction for being suitable for the car body is then transferred automatically after detection recognizes above-mentioned car body information when mobile terminal 100 in moved end 100
Information shortens the response time, meanwhile, a mobile terminal 100 can store the car body information of multiple car bodies and corresponding benchmark
Noise reduction information can be rapidly adapted to, be had wide range of applications when user changes trains driving or seating.
In order to promote the accuracy and promptness of de-noising signal, as shown in figure 4, mobile terminal 100 further includes：Data sharing mould
Block 1601 and data processing module 1602.
Data sharing module 1601 is configured to and audio collection module 110 and at least one 100 data of adjacent mobile terminal
Connection, receives and output noise audio signal is at the audio analysis processing module 120 of at least one adjacent mobile terminal 100
Reason.
Data processing module 1602 is configured to connect with data sharing module 1601 and 130 data of de-noising signal generation module
It connects, receives the de-noising signal that at least one adjacent mobile terminal 100 is fed back, and it is generated with de-noising signal generation module 130
De-noising signal is set algorithm couples, generates coupling de-noising signal and exports to de-noising signal output module 140.Optionally, above-mentioned
Set algorithm includes：After carrying out abnormal point exclusion to the de-noising signal data point that each mobile terminal 100 exports, average value is calculated
Output.
Based on the above-mentioned technical proposal, it when the acquisition of mobile terminal 100 or handling result are there are when deviation, can combine
The data for other mobile terminals 100 are modified so that the filtration result of noise is more preferable.Meanwhile between ensureing mobile terminal 100
Under the premise of data connection efficiency, multiple mobile terminals 100 handle data simultaneously, and it includes that data are accurate that can also promote data processing
Whole efficiency including degree, processing time, even if wherein there are one can ensure noise reduction if mobile terminal breaks down.
In the present invention program, optimization, as shown in figure 5, configured with for storing this car body benchmark in vehicle audio 200
The algorithm storage device 210 of noise reduction information.When a new mobile terminal 100 enters vehicle body, can obtain in advance
To the said reference noise reduction information algorithm for being directed to the car body, the response speed of mobile terminal 100 is promoted.
The working principle and beneficial effect of automobile active noise reduction system of the present invention is as follows：
The audio collection module 110 carried using mobile terminal 100, such as microphone acquire the noise source of sound of vehicle body, and
The processor carried using mobile terminal 100 is pocessed so that the data-handling capacity of above-mentioned automobile active noise reduction system can
It is guaranteed, using upper also more flexible, can organically be combined with applications such as music player softwares, control is facilitated to access.By
It is not solidificated in car body in mobile terminal 100, mobile terminal 100 can voluntarily acquire the arbitrary position of vehicle body according to the setting of user
The noise source of sound set, it is possible thereby to targetedly reduce the noise of user at one's side, noise reduction is more targeted.Meanwhile audio being divided
Analysis processing module 120 and de-noising signal generation module 130 be configured on mobile terminal 100, through mobile terminal 100 by de-noising signal with
Normal sound equipment broadcast format is exported to sound equipment, and mode is simple and reliable so that above-mentioned mobile terminal 100 can be suitable for all at present
The automobile of included sound equipment can make the automobile of no decrease of noise functions that can have decrease of noise functions, entire automobile active noise reduction
System has very strong applicability.
Sound equipment matching module 141 and sound equipment selecting module 142 are set in mobile terminal 100 so that mobile terminal 100 and its
It is connected apart from nearest vehicle audio 200, not only realizes the accurate noise reduction for being directed to different location, while can ensure to move
The timeliness of data transmission between end 100 and vehicle audio 200.
Data sharing module 1601 is set in mobile terminal 100, is capable of the data processing of each mobile terminal of comprehensive consideration 100
As a result, the most accurately de-noising signal is obtained, even if wherein there are one can ensure that noise reduction is imitated if mobile terminal breaks down
Fruit.
Based on above-mentioned automobile active noise reduction system, the invention also provides a kind of automobile active denoising methods, such as Fig. 6 institutes
Show, including：
Establish the data connection between mobile terminal 100 and vehicle audio 200；
The noise audio signal of vehicle body is acquired by mobile terminal 100 and is subject to analyzing processing, is generated and noise frequency and width
It is worth the de-noising signal for inhibiting noise of identical and phase difference 180 degree；
Above-mentioned de-noising signal is transmitted to vehicle audio 200 to play out.
The audio processing operation of noise is moved on mobile terminal 100 and is carried out, it is included not only to take full advantage of mobile terminal 100
Processor and the equipment such as microphone, additionally it is possible to promote the treatment effeciency of noise source of sound, while some being made to be fitted without sound
The vehicle audio 200 of frequency processing chip can also carry out noise reduction operation, have the ability of noise reduction.
In order to targetedly carry out more accurate noise reduction operation to the different zones in car body, as shown in fig. 7, institute
Stating active denoising method further includes：
The distance between mobile terminal 100 and each vehicle audio 200 are detected, according between mobile terminal 100 and vehicle audio 200
Apart from size, the nearest vehicle audio 200 in matching distance mobile terminal 100 and 100 data connection of mobile terminal.
In said program, noise reduction region is 100 region of mobile terminal, i.e. user region, and thus, it is possible to be user
More comfortable riding experience is provided.
As shown in figure 8, the active denoising method further includes：
100 storage inside car body information of mobile terminal and the corresponding benchmark noise reduction information of the car body information；
The detection of mobile terminal 100 identification car body information, the benchmark noise reduction algorithm for being directed to the car body information is transferred according to car body information,
Obtain corresponding noise reduction algorithm；
Analyzing processing is carried out to vehicle body noise according to noise reduction algorithm.
Above-mentioned technical proposal is previously stored the benchmark noise reduction information for being directed to specific car body, and said reference noise reduction information can
It can also be to be obtained when being used in the car body by 100 first time of mobile terminal to be to pre-set, obtain store above-mentioned base in advance
Quasi- noise reduction information, contributes to the quick response of mobile terminal 100.
In order to comprehensively utilize interior mobile terminal 100, efficiency and the accuracy of calculating are promoted, further, such as Fig. 9
Shown, the noise-reduction method further includes,
Establish the data connection between each mobile terminal 100 in car body；
Establish the data connection of at least one mobile terminal 100 and vehicle audio 200 in car body；
Pass through the shared noise reduction algorithm for being directed to the car body noise in one of mobile terminal 100；
By noise audio signal in 100 collecting vehicle of one of mobile terminal, and by above-mentioned noise audio signal share to shifting
Other mobile terminals 100 of 100 data connection of moved end carry out data processing；
At least one de-noising signal that the feedback of each mobile terminal 100 is acquired with 200 data connection of vehicle audio mobile terminal 100,
Noise reduction data are coupled according to set algorithm, obtain coupling de-noising signal；
Above-mentioned coupling de-noising signal is transmitted to vehicle audio 200 to play out.
Based on above-mentioned automobile active noise reduction system and method, it is whole with movement that the invention also provides a kind of automobile active noise reductions
End, is configured to：
Communication module for establishing data connection between vehicle audio 200；
The audio collection module 110 of noise source of sound and output noise audio signal for acquiring vehicle body；
The audio analysis processing module 120 of noise spectrum is calculated for receiving noise audio signal and analyzing；
For generating the drop for inhibiting noise that and phase identical as noise frequency and amplitude differs 180 degree according to noise spectrum
The de-noising signal generation module 130 of noise cancellation signal；
For with 200 data connection of vehicle audio, receive de-noising signal simultaneously output this to the drop that vehicle audio 200 plays out
Noise cancellation signal output module 140；
For receive and output noise audio signal at least one adjacent mobile terminal 100 audio analysis processing module 120 into
The data sharing module 1601 of row processing；
The de-noising signal fed back for receiving at least one adjacent mobile terminal 100, and itself and de-noising signal generation module 130 are given birth to
At de-noising signal be set algorithm couples, generate coupling de-noising signal and export to the data of de-noising signal output module 140
Manage module 1602；
Sound equipment matching module 141 for detecting transmission range between mobile terminal 100 and each vehicle audio 200；
For according to transmission range, matching connection and sound equipment selecting module of the mobile terminal 100 apart from nearest vehicle audio 200
142。
Above-mentioned mobile terminal 100, it is preferred to use smart mobile phone, tablet computer etc. can facilitate and be counted with automobile mounted sound equipment 200
According to connection, automobile noise reduction system is neatly accessed, good noise reduction is reached.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of automobile active noise reduction system, which is characterized in that including at least one vehicle audio (200) being set in car body
And the mobile terminal (100) with the vehicle audio (200) data connection；
The mobile terminal (100) includes：
Audio collection module (110) is configured for the noise source of sound of acquisition vehicle body, output noise audio signal；
Audio analysis processing module (120) is configured to connect with the audio collection module (110) signal, described for receiving
Noise audio signal and analyze noise spectrum is calculated；
De-noising signal generation module (130) is configured to and audio analysis processing module (120) data connection, reception and root
According to the noise spectrum, the drop for inhibiting noise of and phase identical as the noise frequency and amplitude difference 180 degree is generated
Noise cancellation signal；
De-noising signal output module (140), be configured to the vehicle audio (200) data connection, receive the de-noising signal
And it outputs this to vehicle audio (200) and plays out.
2. automobile active noise reduction system according to claim 1, which is characterized in that the de-noising signal output module
(140) include：
Sound equipment matching module (141), for detecting the transmission distance between the mobile terminal (100) and each vehicle audio (200)
From；
Sound equipment selecting module (142), according to the transmission range, matching connection is with the mobile terminal (100) apart from nearest vehicle
Carry sound equipment (200).
3. automobile active noise reduction system according to claim 2, which is characterized in that the mobile terminal (100) includes：
Car body information storage module (150), for storing car body information and benchmark noise reduction information corresponding with the car body information；
Car body information identification module (151), with the audio analysis processing module (120) and car body information storage module
(150) signal connects, and according to car body noise spectrum, identifies car body information, obtains the corresponding benchmark noise reduction letter of the car body information
Breath；
Car body information collecting device (152), for acquiring car body information and exporting to the car body information storage module (150),
Including human-computer interaction module (1520) and/or automatically enter module (1521), wherein
Human-computer interaction module (1520), including human-computer interaction interface, for according to the input marking car body information of user and exporting
To the car body information storage module (150)；
Module (1521) is automatically entered, is connect with audio analysis processing module (120) signal, receives the noise of car body
Frequency spectrum is marked car body with the noise spectrum and exports to car body information storage module (150).
4. automobile active noise reduction system according to claim 1, which is characterized in that the mobile terminal (100) further includes：
Data sharing module (1601) is configured to and the audio collection module (110) and at least one adjacent mobile terminal
(100) data connection receives and at output noise audio signal to the audio analysis of at least one adjacent mobile terminal (100)
Reason module (120) is handled；
Data processing module (1602) is configured to and the data sharing module (1601) and de-noising signal generation module
(130) data connection, receives the de-noising signal of at least one adjacent mobile terminal (100) feedback, and by itself and the noise reduction
The de-noising signal that signal generation module (130) generates is set algorithm couples, generates coupling de-noising signal and exports to the noise reduction
Signal output module (140).
5. automobile active noise reduction system according to claim 1, which is characterized in that configuration in the vehicle audio (200)
It is useful for storing the algorithm storage device (210) of this car body benchmark noise reduction information.
6. a kind of automobile active denoising method, which is characterized in that including：
Establish the data connection between mobile terminal (100) and vehicle audio (200)；
The noise audio signal of vehicle body is acquired by the mobile terminal (100) and is subject to analyzing processing, and generation is made an uproar with described
Acoustic frequency is identical with amplitude and the de-noising signal for inhibiting noise of phase difference 180 degree；
Above-mentioned de-noising signal is transmitted to vehicle audio (200) to play out.
7. automobile active denoising method according to claim 6, which is characterized in that the method further includes,
The distance between mobile terminal (100) and each vehicle audio (200) are detected, according to mobile terminal (100) and vehicle audio
The distance between (200) size, the nearest vehicle audio (200) in mobile terminal (100) and the mobile terminal described in matching distance
(100) data connection.
8. automobile active denoising method according to claim 7, which is characterized in that the method further includes the movement
Hold (100) storage inside car body information and the corresponding benchmark noise reduction information of the car body information；
Mobile terminal (100) detection identification car body information, the benchmark noise reduction calculation for being directed to the car body information is transferred according to car body information
Method obtains corresponding noise reduction algorithm；
Analyzing processing is carried out to vehicle body noise according to the noise reduction algorithm.
9. automobile active denoising method according to claim 8, which is characterized in that the method further includes,
Establish the data connection between each mobile terminal (100) in car body；
Establish the data connection of at least one mobile terminal (100) and vehicle audio (200) in car body；
Pass through one of mobile terminal (100) the shared noise reduction algorithm for being directed to the car body noise；
By noise audio signal in one of mobile terminal (100) collecting vehicle, and by above-mentioned noise audio signal share to
Other mobile terminals (100) of mobile terminal (100) data connection carry out data processing；
At least one mobile terminal (100) with vehicle audio (200) data connection acquires the noise reduction of each mobile terminal (100) feedback
Signal couples noise reduction data according to set algorithm, obtains coupling de-noising signal；
Above-mentioned coupling de-noising signal is transmitted to vehicle audio (200) to play out.
10. a kind of automobile active noise reduction mobile terminal, which is characterized in that it is configured to,
Communication module for establishing data connection between vehicle audio (200)；
The audio collection module (110) of noise source of sound and output noise audio signal for acquiring vehicle body；
The audio analysis processing module (120) of noise spectrum is calculated for receiving the noise audio signal and analyzing；
For identical as the noise frequency and amplitude according to noise spectrum generation and phase difference 180 degree for inhibiting
The de-noising signal generation module (130) of the de-noising signal of noise；
For with vehicle audio (200) data connection, receive the de-noising signal and output this to vehicle audio (200) progress
The de-noising signal output module (140) of broadcasting；
For receive and output noise audio signal at least one adjacent mobile terminal (100) audio analysis processing module
(120) the data sharing module (1601) handled；
De-noising signal for receiving at least one adjacent mobile terminal (100) feedback, and itself and the de-noising signal are given birth to
The de-noising signal generated at module (130) is set algorithm couples, and generation coupling de-noising signal exports defeated to the de-noising signal
Go out the data processing module (1602) of module (140)；
Sound equipment matching module for detecting transmission range between the mobile terminal (100) and each vehicle audio (200)
(141)；
For according to the transmission range, matching connection and sound of the mobile terminal (100) apart from nearest vehicle audio (200)
Ring selecting module (142).
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