CN107360318A - Voice de-noising method, device, mobile terminal and computer-readable recording medium - Google Patents
Voice de-noising method, device, mobile terminal and computer-readable recording medium Download PDFInfo
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- CN107360318A CN107360318A CN201710523438.1A CN201710523438A CN107360318A CN 107360318 A CN107360318 A CN 107360318A CN 201710523438 A CN201710523438 A CN 201710523438A CN 107360318 A CN107360318 A CN 107360318A
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- signal
- audio signal
- changing value
- mobile terminal
- audio
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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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
- 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
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
Abstract
The embodiments of the invention provide a kind of voice de-noising method, device, mobile terminal and computer-readable recording medium, methods described is applied to mobile terminal, and the mobile terminal is connected with earphone, including：Gather the first audio signal；Receive the second audio signal that the earphone is sent；Detect whether the mobile terminal is blocked；Based on the result of the detection, target noise signal is extracted from first audio signal and/or second audio signal；Noise reduction process is carried out to the 3rd audio signal of the acquisition for mobile terminal using the target noise signal, exports the 4th audio signal；Wherein, the 3rd audio signal is the audio signal of earphone collection or the audio signal for being sent to the earphone；By the embodiment of the present invention, the noise reduction schemes being adapted according to residing environment dynamic select are realized, the precision of noise pickup are improved, so as to improve the effect of noise reduction.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of voice de-noising method, device, mobile terminal and meter
Calculation machine readable storage medium storing program for executing.
Background technology
With the development of science and technology, mobile terminal has become communication tool essential in people's life and amusement work
Earphone, can generally be connected by tool with mobile terminal, be operated using earphone to be conversed, play music etc., but at some
Flow, the public place that wagon flow is more, such as public transport, subway, airport public transport station, the larger noise in surrounding environment can influence
The use of earphone.
In the prior art, by add customization sound processing chip, sound processing chip can collection around ring
After noise in border, noise reduction sound wave is generated, when being conversed using earphone, playing the operation such as music, adding noise reduction sound wave can
By noise cancellation, to reach the purpose of de-noising.
But noise in the surrounding environment gathered in the prior art and inaccurate, and when residing for mobile terminal and earphone
Environment when undergoing mutation, the noise in the surrounding environment gathered in the prior art can be more exposed to influence, so as to cause to generate
Noise reduction sound wave can not effective noise reduction, reduce the effect of noise reduction.
The content of the invention
In view of the above problems, the purpose of the embodiment of the present invention is to provide a kind of voice de-noising method, device, mobile terminal
And computer-readable recording medium, in the prior art can not the dynamic select noise reduction schemes adaptable with local environment with solution
The problem of.
In order to solve the above problems, the embodiments of the invention provide a kind of audio defeat method, applied to mobile terminal, institute
State mobile terminal with earphone to be connected, methods described includes：
Gather the first audio signal；
Receive the second audio signal that the earphone is sent；
Detect whether the mobile terminal is blocked；
Based on the result of the detection, target is extracted from first audio signal and/or second audio signal
Noise signal；
Noise reduction process, output are carried out to the 3rd audio signal of the acquisition for mobile terminal using the target noise signal
4th audio signal；Wherein, the 3rd audio signal is the audio signal of earphone collection or is sent to the ear
The audio signal of machine.
The embodiment of the present invention additionally provides a kind of audio defeat device, applied to mobile terminal, the mobile terminal and ear
Machine is connected, and described device includes：
First audio signal sample module, for gathering the first audio signal；
Second audio signal acquisition module, the second audio signal sent for receiving the earphone；
Occlusion detection module, for detecting whether the mobile terminal is blocked；
Target noise signal extraction module, for the result based on the detection, from first audio signal and/or institute
State extraction target noise signal in the second audio signal；
4th audio signal output module, for using the target noise signal to the 3rd of the acquisition for mobile terminal
Audio signal carries out noise reduction process, exports the 4th audio signal；Wherein, the 3rd audio signal is the sound of earphone collection
Frequency signal or the audio signal for being sent to the earphone.
The embodiment of the present invention additionally provides a kind of mobile terminal, including processor, memory and is stored in the memory
Computer program that is upper and can running on the processor, the computer program are realized as above during the computing device
The step of described audio defeat method.
The embodiment of the present invention additionally provides a kind of computer-readable recording medium, is deposited on the computer-readable recording medium
Store up computer program, the computer program realizes audio defeat method as described above when being executed by processor the step of.
The embodiment of the present invention includes advantages below：
In embodiments of the present invention, mobile terminal receives what the earphone being connected was sent by gathering the first audio signal
Second audio signal, then detect whether mobile terminal is blocked, the result based on detection, from the first audio signal and/or the
Target noise signal is extracted in two audio signals, the 3rd audio signal of acquisition for mobile terminal is carried out using target noise signal
Noise reduction process, the 4th audio signal is exported, realize the noise reduction schemes being adapted according to residing environment dynamic select, improve
The precision of noise pickup, so as to improve the effect of noise reduction.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of hardware architecture diagram for the mobile terminal for realizing each embodiment of the present invention；
Fig. 2 is a kind of step flow chart of voice de-noising method of the embodiment of the present invention；
Fig. 3 is a kind of Headphone structure schematic diagram of the embodiment of the present invention；
Fig. 4 is a kind of reduction voltage circuit schematic diagram of the embodiment of the present invention；
Fig. 5 is a kind of supercircuit schematic diagram of the embodiment of the present invention；
Fig. 6 is a kind of structured flowchart of voice noise reduction device of the embodiment of the present invention；
Fig. 7 is a kind of structured flowchart of target noise signal extraction module of the embodiment of the present invention；
Fig. 8 is the structured flowchart of another target noise signal extraction module of the embodiment of the present invention；
Fig. 9 is a kind of structured flowchart for not blocking extracting sub-module of the embodiment of the present invention；
Figure 10 is a kind of structured flowchart of 4th audio signal output module of the embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.Obviously, described embodiment is part of the embodiment of the present invention, without
It is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, belongs to the scope of protection of the invention.
In embodiments of the present invention, mobile terminal include but is not limited to be such as mobile phone, tablet personal computer, notebook computer,
The mobile terminals such as palm PC, guider, wearable device, Intelligent bracelet, pedometer.
Fig. 1 is a kind of hardware architecture diagram for the mobile terminal for realizing each embodiment of the present invention, the mobile terminal 100
Including but not limited to：Radio frequency unit 101, mixed-media network modules mixed-media 102, audio output unit 103, (audio/video) input block 104,
Sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, Yi Ji electricity
The grade part of source 111.It will be understood by those skilled in the art that the mobile terminal structure shown in Fig. 1 is not formed to mobile terminal
Restriction, mobile terminal can include than illustrating more or less parts, either combine some parts or different parts
Arrangement.
The all parts of mobile terminal are specifically introduced with reference to Fig. 1：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, the reception and transmission of signal, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, up data are sent to base station.Generally, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrate
Frequency unit 101 can also be communicated by radio communication with network and other equipment.Above-mentioned radio communication can use any communication
Standard or agreement, including but not limited to GSM (Global System ofMobile communication, global system for mobile telecommunications
System), GPRS (General PacketRadio Service, general packet radio service), CDMA2000 (Code
DivisionMultiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, WCDMA), TD-SCDMA (Time Division-Synchronous Code
DivisionMultiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, FDD Long Term Evolution), TDD-LTE (Time
DivisionDuplexing-Long Term Evolution, time division duplex Long Term Evolution), Wi-Fi module, NFC module and
Bluetooth module etc..
Mobile terminal can help user to send and receive e-mail, browse webpage and access streaming matchmaker by mixed-media network modules mixed-media 102
Body etc., it has provided the user wireless broadband internet and accessed, and mixed-media network modules mixed-media 102 includes but is not limited to be RJ45 port modules
Deng.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or mixed-media network modules mixed-media 102 it is receiving or
It is sound that the voice data stored in memory 109, which is converted into audio signal and exported,.Moreover, audio output unit 103
The audio output related to the specific function that mobile terminal 100 performs can also be provided (for example, call signal receives sound, disappeared
Breath receives sound etc.).Audio output unit 103 includes loudspeaker, buzzer and receiver etc..
Input block 104 is used to receive audio or video signal.Input block 104 can include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the static images or the view data of video obtained in image capture mode by image capture apparatus (such as camera) are carried out
Reason.Picture frame after processing may be displayed on display unit 106.Picture frame after the processing of graphics processor 1041 can be deposited
Storage is transmitted in memory 109 (or other storage mediums) or via radio frequency unit 101 or mixed-media network modules mixed-media 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (voice data), and can be voice data by such acoustic processing.Audio (voice) data after processing can
To be converted to the form output that mobile communication base station can be sent to via radio frequency unit 101 in the case of telephone calling model.
Mobile terminal 100 also includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity transducer can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As one kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axles) size of acceleration, size and the direction of gravity are can detect that when static, available for identification mobile terminal posture should
With (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion)
Deng；The fingerprint sensor that can also configure as mobile terminal, pressure sensor, iris sensor, molecule sensor, gyroscope,
The other sensors such as barometer, hygrometer, thermometer, infrared ray sensor, will not be repeated here.
Display unit 106 is used for the information for showing the information inputted by user or being supplied to user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configures display panel 1061.
User input unit 107 can be used for the numeral or character information for receiving input, and produce the use with mobile terminal
The key signals input that family is set and function control is relevant.Specifically, user input unit 107 may include contact panel 1071 with
And other input equipments 1072.Contact panel 1071, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses any suitable objects or annex such as finger, stylus on contact panel 1071 or in contact panel 1071
Neighbouring operation), and corresponding attachment means are driven according to formula set in advance.Contact panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
Contact coordinate is converted into, then gives processor 110, and the order sent of reception processing device 110 and can be performed.In addition, can
To realize contact panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
Include but be not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
One or more, do not limit herein specifically.
Further, contact panel 1071 can cover display panel 1061, detect thereon when contact panel 1071 or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, contact panel 1071 and display panel
1061 be the part independent as two to realize the input of mobile terminal and output function, but in certain embodiments, can
Input and the output function of mobile terminal are realized so that contact panel 1071 and display panel 1061 is integrated, is not done herein specifically
Limit.
Interface unit 108 is connected the interface that can pass through as at least one external device (ED) with mobile terminal 100.For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storage software program and various data.Memory 109 can mainly include storing program area
And storage data field, wherein, storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Voice data, phone directory etc.) etc..In addition, memory 109 can include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the whole mobile terminal of connection
Individual part, by running or performing the software program and/or module that are stored in memory 109, and call and be stored in storage
Data in device 109, the various functions and processing data of mobile terminal are performed, so as to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Device is managed, wherein, application processor mainly handles operating system, user interface and application program etc., and modem processor is main
Handle radio communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) to all parts power supply, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, so as to realize management charging by power-supply management system, put
The function such as electricity and power managed.
In addition, mobile terminal 100 includes some unshowned functional modules, will not be repeated here.
Based on the hardware configuration of above-mentioned mobile terminal, Detailed Description is carried out to various embodiments of the present invention below.
Reference picture 2, show a kind of step flow chart of voice de-noising method of the embodiment of the present invention.
The embodiment of the present invention can apply to mobile terminal, and mobile terminal can be connected with earphone.
As a kind of example, mobile terminal can be communicated with earphone by the way of being wirelessly transferred, and is wirelessly transferred
Mode can include following one or more：
Ethernet, bluetooth, 2.4G wireless networks, infrared ray and wireless network protocol ZigBee.
Wherein, Ethernet (Ethernet) is a kind of LAN networking technology, using passive medium, by broadcast
Mode propagates information.It define physical layer and data link layer protocol, it is specified that the interface of physical layer and data link layer with
And the interface of data link layer and higher.Its standard topologies is that bus-type is topological, but current Fast Ethernet
(100BASE-T, 1000BASE-T standard) farthest improves network speed and use to farthest reduce conflict
Efficiency, network connection and tissue are carried out using interchanger (Switchhub), so, the topological structure of Ethernet is just into star
Type, but logically, Ethernet still uses bus-type topological sum CSMA/CD (Carrier Sense MultipleAccess/
Collision Detect are csma/cd) bus conflict technology, can be with using Ethernet
To be communicated using WiFi (Wireless LAN devices for being created in the standards of IEEE 802.11).
Bluetooth, it is a kind of holding equipment short haul connection (in general 10m) radiotechnics.Can be including mobile electricity
Wireless messages exchange is carried out between numerous equipment such as words, PDA, wireless headset, notebook computer, related peripherals.Utilize " bluetooth "
Technology, it can effectively simplify the communication between mobile communication terminal device, also can successfully simplify equipment and internet
Communication between Internet, it is radio communication widening road so as to which data transfer becomes more rapid efficient.Bluetooth, which uses, divides
Formula network structure and fast frequency hopping and short packet technology are dissipated, point-to-point and point-to-multipoint delivery is supported, is operated in global general-use
2.4GHz ISM (i.e. industry, science, medical science) frequency range.Its data rate is 1Mbps.Realized using time division duplex transmission scheme complete
Duplex transmission.
2.4G wireless network frequency ranges belong to ISM band, and it is the ultralow radiation green ring being widely used in global range
Protect frequency range；With 125 communication channels, because 2.4G wireless network communications are more unobstructed, will not mutually be done between multiple communication instructions
Disturb；2.4G wireless mesh bandwidth, which passes speed highest, can reach 108Mbps, therefore its transmission speed is quickly；Its transmission distance
From relatively far away from (open field：200m effective propagation paths), and do not influenceed by transmission side, support two-way communication.
Infrared ray, it is a kind of wireless communication mode, the transmission of wireless data can be carried out.Infrared interface is mobile phone of new generation
Configuration standard, it support mobile phone and computer and other digital devices carry out data exchange infrared communications have cost it is cheap,
The characteristics of easy to connect, easy to use and compact-sized, therefore obtained a wide range of applications in small-sized mobile device.Pass through
Infrared interface, all kinds of mobile devices can freely carry out data exchange.
Wireless network protocol ZigBee is a kind of wireless network of low speed short-distance transmission based on IEEE802.15.4 standards
Network agreement.Agreement is respectively physical layer (PHY), MAC layer (MAC), transport layer (TL), Internet from top to bottom
(NWK), application layer (APL) etc..Wherein physical layer and MAC layer follow the regulation of IEEE 802.15.4 standards.
ZigBee-network is mainly characterized by low-power consumption, low cost, low rate, supports great deal of nodes, supports that multiple network is topological, low complexity
Degree, quick, reliable, safety.Equipment is divided into telegon (Coordinator), aggregation node in ZigBee-network
(Router), the Three role such as sensor node (EndDevice).
Certainly, above-mentioned transmission means is intended only as example, when implementing the embodiment of the present invention, can be set according to actual conditions
Other transmission means are put, the embodiment of the present invention is not any limitation as to this.
Specifically, the embodiment of the present invention may include steps of：
Step 201, the first audio signal is gathered；
When user is using earphone collection voice, such as makes a phone call, send voice messaging, or audio is played using earphone
When, music is such as played, the preset chip in mobile terminal can gather the noise in environment by pick up hole, obtain the first audio
Signal.
Wherein, preset chip can be existing chip in mobile terminal, or increased active noise reduction chip, its
The function of ANC (Active Noise Control, active noise control system) can be realized, the first audio signal can include
Positioned at the first of mobile terminal quiet down hole collection audio signal, first quiet down hole can be located at mobile terminal top, be used for
Gather the noise in environment.
Step 202, the second audio signal that the earphone fraction is sent is obtained；
As shown in figure 3, earphone can have second hole the 301, the 3rd that quiets down to quiet down hole 302, second quiets down hole 301 can position
In the top of earphone, for gathering the noise in environment, the 3rd hole 302 that quiets down can be located in earphone and be easy to gather user speech
Position, as at the mouth.
Earphone can gather the noise in environment by the second pick up hole 301, the second audio signal be obtained, then by second
Audio signal is sent to mobile terminal, makes acquisition for mobile terminal to the second audio signal.
Step 203, detect whether the mobile terminal is blocked；
In embodiments of the present invention, mobile terminal can detect whether itself is blocked by infrared sensor, to determine
Whether mobile terminal is in the same environment that quiets down with earphone, so as to the noise reduction side being adapted according to residing environment dynamic select
Case, the precision of noise pickup is improved, lift the effect of noise reduction.
Step 204, the result based on the detection, from first audio signal and/or second audio signal
Extract target noise signal；
After whether detection mobile terminal is blocked, mobile terminal can be selected from the first audio based on the result of detection
Signal, either extract target noise signal in the second audio signal or the first audio signal and the second audio signal.
In one embodiment, step 204 can include following sub-step：
Sub-step S11, when detecting that the mobile terminal is blocked, then extract target from second audio signal
Noise signal.
In inventive embodiments, when detecting that mobile terminal is blocked, mobile terminal is not on same receipts with earphone
In acoustic environment, the noise that can not accurately reflect in environment of the first audio signal of mobile terminal collection, then can directly from
Target noise signal is extracted in second audio signal of earphone collection.
Certainly, can be without carrying out noise reduction process if mobile terminal, earphone are all blocked.
In another embodiment, step 204 can include following sub-step：
Sub-step S21, when detecting that the mobile terminal is not blocked, it is determined that first audio signal is included
First changing value of the intensity in preset time of noise signal, the noise signal that is included of second audio signal it is strong
Spend the second changing value in preset time；
In embodiments of the present invention, when not detecting that mobile terminal is not blocked, mobile terminal is in same with earphone
One is quieted down in environment, then may further determine that mobile terminal, whether the environment that quiets down of earphone undergos mutation, and the hole that such as quiets down is touched
Tactile, unexpected explosive sound etc..
In the specific implementation, mobile terminal can obtain the first audio signal, the second audio signal is sometime putting institute
Comprising noise signal intensity, and obtain the noise that the first audio signal, the second audio signal are included after preset time
The intensity of signal, so as to obtain first change of the intensity for the noise signal that the first audio signal is included in preset time
Second changing value of the intensity for the noise signal that value, the second audio signal are included in preset time.
In fact, audio signal can be electric signal, the intensity of its noise signal included can be noise signal
Magnitude of voltage, the first changing value, the second transformed value can be the changing value of voltage.
As a kind of example, terminal can use the power coupler in preset radio circuit to detect the first audio letter
Number, the voltage of the noise signal included of the second audio signal, and detect the first audio signal, the second audio signal default
The voltage of the noise signal included after time, after 10ms, the first changing value, the second changing value is then calculated.
Sub-step S22, based on first changing value and second changing value, from first audio signal and/or
Target noise signal is extracted in second audio signal.
After the first changing value and the second changing value is obtained, mobile terminal can be from the first audio signal and/or described the
Target noise signal is extracted in two audio signals.
Specifically, following sub-step can be included：
Sub-step S221, when first changing value, second changing value are respectively less than or during more than default changing value,
Average signal is taken after first audio signal and second audio signal are overlapped, and is carried from the average signal
Take target noise signal；
It is determined that after the first changing value, the second changing value, terminal can become the first changing value, the second changing value with default
Change value is compared, when both of which is less or greater than default changing value, i.e., terminal, the environment that quiets down of earphone it is all normal or
All it is mutated, such as unexpected explosive sound, then the first audio signal and the second audio signal can be overlapped, and to folded
Audio signal after adding takes average signal, and target noise signal is then extracted from average signal.
In the specific implementation, sub-step S221 can include following sub-step：
Sub-step S2211, first audio signal and second audio signal are overlapped, obtain superimposed noise
Signal；
When needing to extract target noise signal from the first audio signal and the second audio signal, mobile terminal can be with
First audio signal and the second audio signal are overlapped, obtain superimposed noise signal.
Sub-step S2212, average signal is taken to the superimposed noise signal；
After superimposed noise signal is obtained, mobile terminal can take average signal to superimposed noise signal.
In actual applications, superimposed noise signal can be electric signal, and terminal can be with preset reduction voltage circuit, such as Fig. 4, resistance
R1, resistance R2 resistance are arranged to formed objects, such as 100 ohm, and after superimposed noise signal is obtained, mobile terminal will can be folded
Plus noise signal inputs reduction voltage circuit, has the average signal of the half voltage of superimposed noise signal one after output.
Sub-step S2213, target noise signal is extracted from the average signal.
After average signal is obtained, mobile terminal can be trained to average signal, therefrom extract specific frequency
Signal, as target noise signal, certainly, those skilled in the art directly can also believe average signal as target noise
Number, the invention is not limited in this regard.
Sub-step S222, when first changing value is more than the default changing value and second changing value is less than described
During default changing value, target noise signal is extracted from second audio signal；
In embodiments of the present invention, terminal is provided with default changing value, and such as default changing value is voltage 5mV, when detecting
First changing value is more than default changing value and when the second changing value is less than default changing value, i.e. the environment that quiets down of terminal occurs prominent
Become, such as first hole that quiets down is touched, and the environment that quiets down of earphone is normal, then extracts target from the second audio signal of earphone collection
Noise signal.
Sub-step S223, when first changing value is less than the default changing value and second changing value is more than described
During default changing value, target noise signal is extracted from first audio signal.
When detecting that the first changing value is less than default changing value and the second changing value is more than default changing value, i.e. earphone
The environment that quiets down is mutated, and such as second hole that quiets down is touched, and the environment that quiets down of terminal is normal, then from the first sound of terminal collection
Target noise signal is extracted in frequency signal.
In embodiments of the present invention, by first detecting whether mobile terminal is blocked, to determine that mobile terminal is with earphone
It is no to be in the same environment that quiets down, when mobile terminal is blocked, then directly using the second audio signal conduct of earphone collection
Target noise signal, eliminate the interference of the first audio signal gathered when mobile terminal is blocked.
When mobile terminal is not blocked, mobile terminal is in the same environment that quiets down with earphone, then needs the clothes made of brocade to determine
Whether mobile terminal, the environment that quiets down of earphone undergo mutation, by determining that the first audio signal, the second audio signal are included
Transformed value of the intensity of noise signal in preset time, when being both less than or greater than default changing value, i.e., mobile terminal,
Earphone takes the intensity of noise signal that the first audio signal, the first audio signal included to be averaged in the same environment that quiets down
Value, obtains target noise signal, when being more than default changing value for only one, i.e. the environment that quiets down of mobile terminal or earphone
Mutation, then the noise signal that the side for being not greater than default changing value is included is taken to realize basis as target noise signal
Quiet down the difference of environment, the strategy that quiets down dynamically adjusted, improves the accuracy for collecting ambient noise.
Step 205, noise reduction is carried out to the 3rd audio signal of the acquisition for mobile terminal using the target noise signal
Processing, export the 4th audio signal；Wherein, the 3rd audio signal is the audio signal or to be sent of earphone collection
To the audio signal of the earphone.
In one embodiment, the 3rd audio signal of acquisition for mobile terminal can be the audio signal of earphone collection,
The audio signal for the hole collection that quieted down positioned at the 3rd of earphone can be included, the voice of earphone collection user, terminal when such as making a phone call
After target noise signal being used to carry out noise reduction process to the 3rd audio signal, the 4th audio signal is obtained, then passes through shifting
The antenna of dynamic terminal sends the 4th audio signal, is such as sent to the phone of opposite end.
In another embodiment, the 3rd audio signal of acquisition for mobile terminal can be to be sent to the audio of earphone
Signal, such as listens the music that will be played during music in earphone, and mobile terminal can use target noise signal to the 3rd audio
Signal carry out noise reduction process after, obtain the 4th audio signal, the 4th audio signal be sent to earphone, so as to making an uproar in environment
Sound offsets, and user is heard more clear 3rd audio signal.
Specifically, step 205 can include following sub-step：
Sub-step S31, determine the phase and intensity of the target noise signal；
Because target noise signal can be electric signal, electric signal has phase and intensity, and terminal can determine target
The phase and intensity of noise signal.
Sub-step S32, generation and the opposite in phase and intensity identical de-noising signal of the target noise signal；
It is determined that after the phase and intensity of target noise signal, terminal uses carries out anti-phase place to target noise signal
Reason, generation and the opposite in phase and intensity identical de-noising signal of target noise signal.
Wherein, anti-phase processing can be the process for A being become-A, can have a large amount of process chips, chip in terminal
Substantial amounts of logic circuit can be included, can complete to add, subtract, computing, the terminal such as multiplication and division can be completed anti-phase by logic circuit
Processing.
Sub-step S33, the 3rd audio signal that the de-noising signal is obtained with the terminal are overlapped, output the 4th
Audio signal.
After de-noising signal is generated, de-noising signal is electric signal, and terminal can be by preset supercircuit, such as Fig. 5, will
The 3rd audio signal input supercircuit that de-noising signal obtains with terminal, exports the 4th audio signal.
In Figure 5, V1 is the 3rd audio signal of input, and V2 is the de-noising signal of input, and V0 is the 4th audio of output
Signal, R, RfFor resistance, LM741 is universal operational amplifier integrated circuit.
In embodiments of the present invention, mobile terminal receives what the earphone being connected was sent by gathering the first audio signal
Second audio signal, then detect whether mobile terminal is blocked, the result based on detection, from the first audio signal and/or the
Target noise signal is extracted in two audio signals, the 3rd audio signal of acquisition for mobile terminal is carried out using target noise signal
Noise reduction process, the 4th audio signal is exported, realize the noise reduction schemes being adapted according to residing environment dynamic select, improve
The precision of noise pickup, so as to improve the effect of noise reduction.
Reference picture 6, a kind of structured flowchart of audio defeat device of the embodiment of the present invention is shown, applied in terminal,
Mobile terminal is connected with earphone, can specifically include following module：
First audio signal sample module 601, for gathering the first audio signal；
Second audio signal acquisition module 602, the second audio signal sent for receiving the earphone；
Occlusion detection module 603, for detecting whether the mobile terminal is blocked；
Target noise signal extraction module 604, for the result based on the detection, from first audio signal and/
Or target noise signal is extracted in second audio signal；
4th audio signal output module 605, for using the target noise signal to the acquisition for mobile terminal
3rd audio signal carries out noise reduction process, exports the 4th audio signal；Wherein, the 3rd audio signal gathers for the earphone
Audio signal or be sent to the audio signal of the earphone.
In a kind of preferred embodiment of the present invention, such as Fig. 7, the target noise signal extraction module 604 includes：
Extracting sub-module 6041 is blocked, for when detecting that the mobile terminal is blocked, then from second audio
Target noise signal is extracted in signal.
In a kind of preferred embodiment of the present invention, such as Fig. 8, the target noise signal extraction module 604 includes：
Changing value determination sub-module 6042, for when detecting that the mobile terminal is not blocked, it is determined that described
First changing value of the intensity for the noise signal that one audio signal is included in preset time, second audio signal are wrapped
Second changing value of the intensity of the noise signal contained in preset time；
Extracting sub-module 6043 is not blocked, for based on first transformed value and second changing value, from described
Target noise signal is extracted in one audio signal and/or second audio signal.
In a kind of preferred embodiment of the present invention, such as Fig. 9, the extracting sub-module 6043 of not blocking includes：
First object noise signal extraction unit 60431, for when first changing value, second changing value it is small
When default changing value, average letter is taken after first audio signal and second audio signal are overlapped
Number, and target noise signal is extracted from the average signal；
Second target noise signal extraction unit 60432, for being more than the default changing value when first changing value
And second changing value extracts target noise signal when being less than the default changing value from second audio signal；
3rd target noise signal extraction unit 60433, for being less than the default changing value when first changing value
And second changing value extracts target noise signal when being more than the default changing value from first audio signal.
In a kind of preferred embodiment of the present invention, such as Figure 10, the 4th audio signal output module 605 includes：
Phase intensity determination sub-module 6051, for determining the phase and intensity of the target noise signal；
De-noising signal generates submodule 6052, identical with the opposite in phase and intensity of the target noise signal for generating
De-noising signal；
Output sub-module 6053 is superimposed, for the de-noising signal and the 3rd audio signal to be overlapped, output
4th audio signal.
Mobile terminal provided in an embodiment of the present invention can realize that mobile terminal is realized each in Fig. 2 embodiment of the method
Process, to avoid repeating, repeat no more here.
In embodiments of the present invention, mobile terminal receives what the earphone being connected was sent by gathering the first audio signal
Second audio signal, then detect whether mobile terminal is blocked, the result based on detection, from the first audio signal and/or the
Target noise signal is extracted in two audio signals, the 3rd audio signal of acquisition for mobile terminal is carried out using target noise signal
Noise reduction process, the 4th audio signal is exported, realize the noise reduction schemes being adapted according to residing environment dynamic select, improve
The precision of noise pickup, so as to improve the effect of noise reduction.
Preferably, the embodiment of the present invention also provides a kind of mobile terminal, including processor 110, memory 109, is stored in
On memory 109 and the computer program that can be run on the processor 110, the computer program are performed by processor 110
Each process of the above-mentioned voice de-noising method embodiments of Shi Shixian, and identical technique effect can be reached, to avoid repeating, here
Repeat no more.
The embodiment of the present invention also provides a kind of computer-readable recording medium, and letter is stored with computer-readable recording medium
Processing routine is ceased, the message handling program realizes each process of above-mentioned voice de-noising method embodiment when being executed by processor,
And identical technique effect can be reached, to avoid repeating, repeat no more here.Wherein, described computer-readable recording medium,
Such as read-only storage (Read-Only Memory, abbreviation ROM), random access memory (RandomAccess Memory, letter
Claim RAM), magnetic disc or CD etc..
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal (can be mobile phone, computer, service
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (12)
1. a kind of audio defeat method, applied to mobile terminal, the mobile terminal is connected with earphone, it is characterised in that institute
The method of stating includes：
Gather the first audio signal；
Receive the second audio signal that the earphone is sent；
Detect whether the mobile terminal is blocked；
Based on the result of the detection, target noise is extracted from first audio signal and/or second audio signal
Signal；
Noise reduction process, output the 4th are carried out to the 3rd audio signal of the acquisition for mobile terminal using the target noise signal
Audio signal；Wherein, the 3rd audio signal is the audio signal of earphone collection or is sent to the earphone
Audio signal.
2. according to the method for claim 1, it is characterised in that the result based on the detection, from first sound
The step of target noise signal is extracted in frequency signal and/or second audio signal includes：
When detecting that the mobile terminal is blocked, then target noise signal is extracted from second audio signal.
3. according to the method for claim 1, it is characterised in that the result based on the detection, from first sound
The step of target noise signal is extracted in frequency signal and/or second audio signal includes：
When detecting that the mobile terminal is not blocked, it is determined that the noise signal that first audio signal is included it is strong
The first changing value in preset time, the intensity for the noise signal that second audio signal is included are spent in preset time
The second changing value；
Based on first changing value and second changing value, believe from first audio signal and/or second audio
Target noise signal is extracted in number.
4. according to the method for claim 3, it is characterised in that described to be changed based on first transformed value with described second
Value, include from first audio signal and/or second audio signal the step of extraction target noise signal：
When first changing value, second changing value are respectively less than or during more than default changing value, by first audio
Signal and second audio signal take average signal after being overlapped, and target noise letter is extracted from the average signal
Number；
When first changing value is more than the default changing value and second changing value is less than the default changing value, from
Target noise signal is extracted in second audio signal；
When first changing value is less than the default changing value and second changing value is more than the default changing value, from
Target noise signal is extracted in first audio signal.
5. according to the method for claim 1, it is characterised in that described whole to the movement using the target noise signal
The step of 3rd audio signal of end acquisition carries out noise reduction process, exports four audio signals includes：
Determine the phase and intensity of the target noise signal；
Generation and the opposite in phase and intensity identical de-noising signal of the target noise signal；
The de-noising signal and the 3rd audio signal are overlapped, export the 4th audio signal.
6. a kind of audio defeat device, it is characterised in that applied to mobile terminal, the mobile terminal is connected with earphone, institute
Stating device includes：
First audio signal sample module, for gathering the first audio signal；
Second audio signal acquisition module, the second audio signal sent for receiving the earphone；
Occlusion detection module, for detecting whether the mobile terminal is blocked；
Target noise signal extraction module, for the result based on the detection, from first audio signal and/or described
Target noise signal is extracted in two audio signals；
4th audio signal output module, for the 3rd audio using the target noise signal to the acquisition for mobile terminal
Signal carries out noise reduction process, exports the 4th audio signal；Wherein, the 3rd audio signal is the audio letter of earphone collection
Number or be sent to the audio signal of the earphone.
7. device according to claim 6, it is characterised in that the target noise signal extraction module includes：
Extracting sub-module is blocked, for when detecting that the mobile terminal is blocked, then being carried from second audio signal
Take target noise signal.
8. device according to claim 6, it is characterised in that the target noise signal extraction module includes：
Changing value determination sub-module, for when detecting that the mobile terminal is not blocked, it is determined that the first audio letter
The noise that first changing value of the intensity of number noise signal included in preset time, second audio signal are included
Second changing value of the intensity of signal in preset time；
Extracting sub-module is not blocked, for based on first transformed value and second changing value, believing from first audio
Number and/or second audio signal in extract target noise signal.
9. device according to claim 8, it is characterised in that the extracting sub-module of not blocking includes：
First object noise signal extraction unit, for being respectively less than or big when first changing value, second changing value
When default changing value, average signal is taken after first audio signal and second audio signal are overlapped, and from
Target noise signal is extracted in the average signal；
Second target noise signal extraction unit, for being more than the default changing value and described second when first changing value
When changing value is less than the default changing value, target noise signal is extracted from second audio signal；
3rd target noise signal extraction unit, for being less than the default changing value and described second when first changing value
When changing value is more than the default changing value, target noise signal is extracted from first audio signal.
10. device according to claim 1, it is characterised in that the 4th audio signal output module includes：
Phase intensity determination sub-module, for determining the phase and intensity of the target noise signal；
De-noising signal generates submodule, believes for generating with the opposite in phase of the target noise signal and intensity identical noise reduction
Number；
Output sub-module is superimposed, for the de-noising signal and the 3rd audio signal to be overlapped, exports the 4th audio
Signal.
11. a kind of mobile terminal, it is characterised in that including processor, memory and be stored on the memory and can be in institute
The computer program run on processor is stated, the computer program is realized such as claim 1 to 5 during the computing device
Any one of audio defeat method the step of.
12. a kind of computer-readable recording medium, it is characterised in that computer journey is stored on the computer-readable recording medium
Sequence, the audio defeat method as any one of claim 1 to 5 is realized when the computer program is executed by processor
Step.
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