CN108063996A - A kind of Type C interface earphone and its implementation - Google Patents
A kind of Type C interface earphone and its implementation Download PDFInfo
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- CN108063996A CN108063996A CN201810068743.0A CN201810068743A CN108063996A CN 108063996 A CN108063996 A CN 108063996A CN 201810068743 A CN201810068743 A CN 201810068743A CN 108063996 A CN108063996 A CN 108063996A
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- 230000004224 protection Effects 0.000 claims description 18
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- 238000004088 simulation Methods 0.000 claims description 7
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention provides a kind of Type C interface earphone and its implementation.The earphone includes：Type C interface, for the voice signal of receiving terminal apparatus transmission；Micro controller unit is connected with Type C interface, for Type C interface to be controlled to receive voice signal；Feed forward noise reduction microphone, for detecting ambient noise signal；Ambient noise signal after noise reduction for receiving the ambient noise signal of feed forward noise reduction microphone output, and is transmitted to micro controller unit by the first Dolby circuit；And second Dolby circuit, for receiving the analog voice signal of micro controller unit generation, and the analog voice after the second noise reduction process is exported into signal output to loud speaker；Wherein, micro controller unit also carries out the ambient noise signal after voice signal and noise reduction analog-to-digital conversion and digital-to-analogue conversion process to generate analog voice signal, and analog voice signal is exported to the second Dolby circuit.It converses present invention accomplishes user under noisy environment and listens the demand of song, improve user experience.
Description
Technical field
The present invention relates to audio communication technologies field, more particularly to a kind of Type C interface earphone and its implementation.
Background technology
With the rapid development of each electronic product, earphone has become very important common electricity in people's daily life
Sub- product accessories, meanwhile, consumer is also higher and higher to the functional diversities requirement of earphone.Especially Type-C interfaces connect,
It has many advantages, such as slim interface, non-directional, realization quick charge, data transmission is stable, transmission speed is fast, anti-interference.From
Domestic electronics industry consumption leader Huawei starts that Type-C interface headphones are researched and developed and put into, and Vivo carries out Type-C ears
The research and development of machine start to be installed on its smart mobile phone in succession, the mobile phone of new generation of external E-consumer major brand Apple
No longer 3.5 millimeters of earphone interfaces of retention criteria more fully develop so as to be provided to the digitlization of Type-C interface headphones
Space.This undoubtedly accelerates the development of Type-C interface headphones so that this kind of earphone is applied to oneself by more electronics firms
The equipment such as smart mobile phone, tablet computer, notebook, desktop computer on.
On the other hand, urbanization, the degree of urbanization are higher and higher in world wide, and the noise pollution in city is more and more tighter
Weight can substantially reduce accuracy and comfort that people receive voice signal using earphone in noisy environment.Common headphones are only
Noise can be sheltered by improving volume, this will be unable to enjoy beautiful music, also there is very big damage to one's own listening.And it drops
It makes an uproar the appearance of earphone, solves the problems, such as this well, today of oneself health, the need of noise cancelling headphone are increasingly cared about in people
It asks and also increases rapidly, reason is not only can be preferably in outdoor appreciation music using noise cancelling headphone, moreover it is possible in use
Ensure the health of human body ear.
Therefore, a kind of earphone for the Type-C interfaces for adapting to industry development of exploitation in need, can intelligently realize good
Anti-acoustic capability, to user better tonequality is brought to experience.
The content of the invention
Based on this, in view of the shortcomings of the prior art, the present invention provides a kind of Type-C interface headphones and its implementation, with
It solves the above problems.
According to embodiments of the present invention, a kind of Type C interface earphone is provided, the earphone includes：Type C interface, is used for
The voice signal of receiving terminal apparatus transmission；Micro controller unit is connected with the Type C interface, for controlling the Type
C interface receives the voice signal；Feed forward noise reduction microphone, for detecting ambient noise signal；First Dolby circuit, for connecing
The ambient noise signal of feed forward noise reduction microphone output is received to carry out the first noise reduction process, and by the environment after noise reduction
Noise signal transmission is to the micro controller unit；And second Dolby circuit, it is generated for receiving the micro controller unit
Analog voice signal to carry out the second noise reduction process, and the analog voice after the second noise reduction process is exported into signal output to raising
Sound device；Wherein, the micro controller unit also carries out modulus to the ambient noise signal after the voice signal and the noise reduction
Conversion and digital-to-analogue conversion process are exported the analog voice signal to the described second drop with generating the analog voice signal
Noise cancellation circuit.
The Type C interface earphones provided according to embodiments of the present invention by improving interlock circuit structure, reach earphone drop
The effect of making an uproar meets the needs of user converses under noisy environment and listens song, improves user experience.
Further, first Dolby circuit includes：First ESD is protected and anti-jamming circuit, is connected to the feedforward
Noise reduction microphone；And the first π types LC filtering and anti-jamming circuit, it is connected to the first ESD protection and anti-jamming circuit；Its
In, the ambient noise signal by the first ESD protect and anti-jamming circuit handle after, then input to the first π
Type LC is filtered and anti-jamming circuit is for further processing, then phase adjusted rear output to the microprocessor unit.
Further, second Dolby circuit includes：2nd π types LC is filtered and anti-jamming circuit, is connected to described micro-
Controller unit, to receive the analog voice signal；And the 2nd ESD protection and anti-jamming circuit, be connected to the 2nd π
Type LC filtering and anti-jamming circuit and the loud speaker；Wherein, treated the analog voice signal is by the microcontroller
Unit is exported to the 2nd π types LC filtering and anti-jamming circuit, be then passed through the 2nd ESD protection and anti-jamming circuit into
It is exported after row noise reduction process to the loud speaker.
Further, the earphone further includes：Symmetrical sound hole, for receiving call voice signal；And call Mike
Wind is connected to the symmetrical sound hole and first Dolby circuit；Wherein, the symmetrical sound hole believes the call voice
Output number is let out after wind energy and drop low wind noise processing to the call microphone.
Further, it is described that the call voice signal after drop low wind noise is also sent to described first by microphone
Dolby circuit is to carry out noise reduction process and first Dolby circuit by the call voice signal transmission after noise reduction to institute
Micro controller unit is stated, to carry out analog-to-digital conversion and digital-to-analogue conversion, and will treated that simulation call voice signal passes through is described
Type C interface is exported to the terminal device, to send correspondent to.
Further, the earphone further includes：Noise reduction switch is connected to first Dolby circuit, described for controlling
Whether micro controller unit enters noise reduction mode.
Further, the earphone further includes：LED illuminating circuits communicate information to institute by the micro controller unit
The first Dolby circuit is stated, controls the instruction state of the LED illuminating circuits and LED light.
Further, the earphone further includes：Control circuit is connected to the microcontroller by first Dolby circuit
Device unit sends command signal by button, and the micro controller unit is output to by first Dolby circuit, to realize
Command function.
Further, when the terminal device enters deep sleep, the finger is sent by the control circuit
Signal is made, the micro controller unit starts to wake up the terminal device.
Another embodiment according to the present invention provides a kind of implementation method of Type C interface earphone, the described method includes：Profit
With Type C interface its voice signal transmitted is received from terminal device；It is connect using Type C described in microprogrammed control unit control
Mouth receives the voice signal；Ambient noise is detected using feed forward noise reduction microphone；Using the first Dolby circuit receive it is described before
The ambient noise signal of feedback noise reduction microphone output is to carry out the first noise reduction process, and by the ambient noise signal after noise reduction
It is transmitted to the micro controller unit；And receive the micro controller unit treated simulation language using the second Dolby circuit
Analog voice after second noise reduction process is exported signal output to loud speaker by sound signal to carry out the second noise reduction process；Its
In, the micro controller unit also carries out analog-to-digital conversion sum number to the ambient noise signal after the voice signal and the noise reduction
Mould conversion process is exported the analog voice signal to second Dolby circuit with generating the analog voice signal.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structure diagram according to a kind of Type-C interface headphones of first embodiment of the invention.
Fig. 2 is the structure diagram according to the first Dolby circuit of the Type-C interface headphones of the embodiment of the present invention.
Fig. 3 is the structure diagram according to the second Dolby circuit of the Type-C interface headphones of the embodiment of the present invention.
Fig. 4 is the structure diagram according to a kind of Type-C interface headphones of second embodiment of the invention.
Fig. 5 is the structure diagram according to a kind of Type-C interface headphones of third embodiment of the invention.
Fig. 6 is the structure diagram according to a kind of Type-C interface headphones of fourth embodiment of the invention.
Fig. 7 is the structure diagram according to a kind of Type-C interface headphones of fifth embodiment of the invention.
Fig. 8 is the structure diagram according to a kind of Type-C interface headphones of sixth embodiment of the invention.
Fig. 9 is the flow chart according to a kind of implementation method of Type-C interface headphones of seventh embodiment of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side ", " on ", " under " and similar statement for illustrative purposes only rather than instruction or imply signified device or member
Part must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.Term as used herein " and/or " include the arbitrary of one or more relevant Listed Items and
All combinations.
The object of the present invention is to provide a kind of Type C interface earphone, the earphone includes：Type C interface, for receiving
The voice signal of terminal device transmission；Micro controller unit is connected with the Type C interface, for the Type C to be controlled to connect
Mouth receives the voice signal；Feed forward noise reduction microphone, for detecting ambient noise signal；First Dolby circuit, for receiving
The ambient noise signal of the feed forward noise reduction microphone output is made an uproar the environment after noise reduction with carrying out the first noise reduction process
Acoustical signal is transmitted to the micro controller unit；And second Dolby circuit, it generates for receiving the micro controller unit
Analog voice after second noise reduction process is exported signal output to raising one's voice by analog voice signal to carry out the second noise reduction process
Device；Wherein, the micro controller unit also carries out modulus turn to the ambient noise signal after the voice signal and the noise reduction
It changes with digital-to-analogue conversion process to generate the analog voice signal, and the analog voice signal is exported to second noise reduction
Circuit.
A kind of Type C interface earphone provided according to the present invention, by improving interlock circuit structure, reaches earphone noise reduction
The effect of, meet the needs of user converses under noisy environment and listens song, improve user experience.
Fig. 1 is the structure diagram according to a kind of Type-C interface headphones of first embodiment of the invention, as shown in Figure 1,
The earphone includes Type C interface 10, micro controller unit 20, feed forward noise reduction microphone 30, the first Dolby circuit 40, second drop
Noise cancellation circuit 50 and loud speaker 60.Type C interface 10 is used for the voice signal of receiving terminal apparatus transmission, wherein terminal device
Can be the equipment such as mobile terminal, tablet computer, laptop, desktop computer.Micro controller unit 20 and Type C interface
10 connections, for controlling the voice signal that 10 receiving terminal apparatus of Type C interface transmits, wherein micro controller unit 20 can be with
For such as MCU controllers, analog-digital converter ADC and digital analog converter DAC are included.When earphone connects end by Type C interface 10
After end equipment, terminal device starts to power to micro controller unit 20, and clock circuit and micro controller unit 20 are started to work.When
The voice signal of terminal device is transmitted to micro controller unit 20 by Type C interface 10, can pass through at ADC and DAC conversions
Reason.Meanwhile the L/R feed forward noise reduction microphones for the earphone worn are separately positioned on L auricular conchas and R auricular conchas, for detecting environment
Noise signal, and make the first drop by being connected to the first Dolby circuit 40 of micro controller unit 10 and feed forward noise reduction microphone 30
It makes an uproar and is inputted after handling to the ADC inside micro controller unit 20 and DAC to perform analog-to-digital conversion and digital-to-analogue conversion.Microcontroller list
After ambient noise after first 20 pairs of voice signals and noise reduction process carries out ADC and DAC conversion process, analog voice signal is generated,
It further exports to the second Dolby circuit 50.Second Dolby circuit 50 is connected to micro controller unit 20 and loud speaker 60, is used for
It receives, the analog voice signal that micro controller unit 20 generates, and will be after the second noise reduction process to carry out the second noise reduction process
Analog voice exports signal output to loud speaker 60, so as to complete to listen to process.Wherein, micro controller unit 20 is to the voice
Ambient noise signal after signal and the noise reduction carries out analog-to-digital conversion and digital-to-analogue conversion process to generate the analog voice
Signal, and the analog voice signal is exported to the second Dolby circuit 50.
Fig. 2 is according to the structure diagram of the first Dolby circuit of the Type-C interface headphones of the embodiment of the present invention, in Fig. 1
First Dolby circuit 40 can include ESD protections and anti-jamming circuit 400 and π types LC filtering and anti-jamming circuit 410, wherein ESD
Protection and anti-jamming circuit 400 may connect to the feed forward noise reduction microphone 30 of Fig. 1, and π types LC filtering and anti-jamming circuit 410 can connect
It is connected to ESD protections and anti-jamming circuit 400.The ambient noise signal that feed forward noise reduction microphone detects is protected and resisted by ESD
After circuit 400 is disturbed to handle, then input to π types LC filtering and anti-jamming circuit 410 and be for further processing, it is then phase adjusted
It is exported afterwards to the microprocessor unit of Fig. 1 and is converted with being ADC and DAC.
In one embodiment, the ambient noise signal that the feed forward noise reduction microphone on L auricular conchas and R auricular conchas detects passes through
After ESD protections and anti-jamming circuit 400 are handled, π types LC filtering and anti-jamming circuit 410 are reached, after being then passed through phase adjustment
Enter micro controller unit 20.After micro controller unit 20 is to ambient noise signal and Speech processing, output simulation language
Sound signal is for further processing to the second Dolby circuit.
Fig. 3 is according to the structure diagram of the second Dolby circuit of the Type-C interface headphones of the embodiment of the present invention, in Fig. 1
Second Dolby circuit 50 can include π types LC filtering and anti-jamming circuit 500 and ESD protections and anti-jamming circuit 510, wherein π types
LC filtering and anti-jamming circuit 500 may connect to the micro controller unit 20 of Fig. 1, to receive the mould of the generation of micro controller unit 20
Intend voice signal；ESD is protected and anti-jamming circuit 510 may connect to raising one's voice for π types LC filtering and anti-jamming circuit 500 and Fig. 1
Device 60.Micro controller unit output treated analog voice signal is filtered to π types LC and anti-jamming circuit 500, then passes through again
It is exported after crossing ESD protections and the progress noise reduction process of anti-jamming circuit 510 to the loud speaker 60 of Fig. 1.
In one embodiment, after micro controller unit 20 is to ambient noise signal and Speech processing, output simulation language
Sound signal can be implemented as further processing to the second Dolby circuit：Analog voice signal is output to π types LC filtering and resists
Circuit 500 is disturbed, after being then passed through ESD protections and the processing of anti-jamming circuit 510, analog voice output signal is generated and is simultaneously transmitted to
Loud speaker 60, such as L/R loud speakers, so as to complete to listen to process.
Fig. 4 is the structure diagram according to a kind of Type-C interface headphones of second embodiment of the invention, as shown in Fig. 2,
In addition to the structure comprising Fig. 1, which still further comprises symmetrical sound hole 70 and call microphone 80.Symmetrical sound hole 70
For receiving call voice signal in call, which is conducive to let out wind energy and drop low wind noise, by call voice
After signal lets out wind energy and drop low wind noise processing, output to call microphone 80.Call voice signal enters call microphone
It is after 80s, can be further transmitted to the first Dolby circuit 40 carry out that noise reduction process and the first Dolby circuit 40 will be after noise reduction it is logical
Language sound signal is transmitted to micro controller unit 20, to carry out analog-to-digital conversion and digital-to-analogue conversion process, and will treated simulation
Call voice signal is exported by Type C interface 10 to the terminal device, to send correspondent to, so as to complete to converse
Journey.
In one embodiment, voice signal is conducive to by symmetrical sound hole 70 after letting out wind energy and drop low wind noise during call,
Enter call microphone 80, by ESD protection and anti-jamming circuit 400 after, then pass through π types LC filtering and anti-jamming circuit
410 enter the ADC conversions and DAC conversions inside micro controller unit, pass through the Type C interface incoming terminal equipment
To be transmitted to other side, communication process is completed.
Fig. 5 is according to a kind of structure diagram of Type-C interface headphones of third embodiment of the invention, further includes noise reduction
Switch 90, is connected to the first Dolby circuit 40, for controlling whether micro controller unit 20 enters noise reduction mode.Noise reduction switch 90
Can be ANC On/Off switches, ANC On/Off switches pass through (such as the ESD therein protections and anti-dry of the first Dolby circuit 40
Disturb circuit 400) after, whether control micro controller unit 20 enters noise reduction mode.
Fig. 6 is according to a kind of structure diagram of Type-C interface headphones of fourth embodiment of the invention, further includes LED hairs
Optical circuit 100, LED illuminating circuits 100 are to communicate information to the first Dolby circuit 40 (such as wherein by micro controller unit 20
ESD protections and anti-jamming circuit 400) after, the instruction state of control LED illuminating circuits 100 and LED light.
Fig. 7 is according to a kind of structure diagram of Type-C interface headphones of fifth embodiment of the invention, further includes control
Circuit 110 is connected to microcontroller list by the first Dolby circuit 40 (such as ESD therein protections and anti-jamming circuit 400)
Member 20, control circuit 110 by its button (such as volume+,-, broadcasting/pause, etc.) send command signal, by the first drop
Noise cancellation circuit 40 (such as ESD therein protections and anti-jamming circuit 400) is output to micro controller unit 20, to realize instruction work(
Energy.
Further, when the terminal device remains static and enters deep sleep (work(is saved completely
Consumption state) when, command signal is sent by control circuit 110, microcontroller list is arrived by ESD protections and anti-jamming circuit 400
Member 20 wakes up detection circuit by control and starts to wake up terminal device, such as wakes up the wake-up circuit of the terminal device.
Fig. 8 is according to a kind of structure diagram of Type-C interface headphones of sixth embodiment of the invention, further includes clock
Circuit 120, after earphone connects terminal device by Type C interface 10, the terminal device starts to micro controller unit 20
Power supply, clock circuit 120 and micro controller unit 20 are started to work.
Fig. 9 is the flow chart according to a kind of implementation method 900 of Type-C interface headphones of seventh embodiment of the invention.Institute
It states method 900 and includes at least following steps：
Step 902：Using Type C interface its voice signal transmitted is received from terminal device；
Step 904：The voice signal is received using Type C interface described in microprogrammed control unit control；
Step 906：Ambient noise signal is detected using feed forward noise reduction microphone；
Step 908：The ambient noise signal of the feed forward noise reduction microphone output is received using the first Dolby circuit
To carry out the first noise reduction process, and the ambient noise signal after noise reduction is transmitted to the micro controller unit；
Step 910：Using the second Dolby circuit receive the micro controller unit treated analog voice signal with into
The second noise reduction process of row, and the analog voice after the second noise reduction process is exported into signal output to loud speaker；
Wherein, the micro controller unit also carries out mould to the ambient noise signal after the voice signal and the noise reduction
Number conversion and digital-to-analogue conversion process are exported the analog voice signal to described second with generating the analog voice signal
Dolby circuit.
The implementation method of the Type C interface earphones provided according to the present invention, by improve the earphone of interlock circuit structure into
Row noise reduction process, meets the needs of user converses under noisy environment and listens song, improves user the effect of reaching earphone noise reduction
Usage experience.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity is distinguished with another entity, and without necessarily requiring or implying between these entities, there are any this actual passes
System or order.Moreover, term " comprising ", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, from
And cause the article for including a series of elements or equipment not only including those elements, but also its including being not explicitly listed
It his element or further includes as this article or the intrinsic element of equipment.In the absence of more restrictions, by language
The element that sentence "including a ..." limits, it is not excluded that also exist in addition in the article including the element or equipment
Identical element.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (10)
1. a kind of Type C interface earphone, which is characterized in that the earphone includes：
Type C interface, for the voice signal of receiving terminal apparatus transmission；
Micro controller unit is connected with the Type C interface, for the Type C interface to be controlled to receive the voice signal；
Feed forward noise reduction microphone, for detecting ambient noise signal；
First Dolby circuit is connected to the micro controller unit and the feed forward noise reduction microphone, for receiving the feedforward
The ambient noise signal of noise reduction microphone output is passed the ambient noise signal after noise reduction with carrying out the first noise reduction process
Transport to the micro controller unit；And
Second Dolby circuit is connected to the micro controller unit, for receiving the simulation language that the micro controller unit generates
Analog voice after second noise reduction process is exported signal output to loud speaker by sound signal to carry out the second noise reduction process；
Wherein, the micro controller unit also carries out modulus turn to the ambient noise signal after the voice signal and the noise reduction
It changes with digital-to-analogue conversion process to generate the analog voice signal, and the analog voice signal is exported to second noise reduction
Circuit.
2. Type C interface earphone according to claim 1, which is characterized in that first Dolby circuit includes：
First ESD is protected and anti-jamming circuit, is connected to the feed forward noise reduction microphone；And
First π types LC is filtered and anti-jamming circuit, is connected to the first ESD protections and anti-jamming circuit；
Wherein, the ambient noise signal by the first ESD protect and anti-jamming circuit processing after, then input to described
First π types LC is filtered and anti-jamming circuit is for further processing, then phase adjusted rear output to the microprocessor unit.
3. Type C interface earphone according to claim 1, which is characterized in that second Dolby circuit includes：
2nd π types LC is filtered and anti-jamming circuit, the micro controller unit is connected to, to receive the analog voice signal；
And
2nd ESD is protected and anti-jamming circuit, is connected to the 2nd π types LC filtering and anti-jamming circuit and the loud speaker；
Wherein, treated the analog voice signal exported by the micro controller unit to the 2nd π types LC filtering and
Anti-jamming circuit is exported after being then passed through the 2nd ESD protections and anti-jamming circuit progress noise reduction process to the loud speaker.
4. Type C interface earphone according to claim 1, which is characterized in that the earphone further includes：
Symmetrical sound hole, for receiving call voice signal；And
Call microphone, is connected to the symmetrical sound hole and first Dolby circuit；
Wherein, the symmetrical sound hole is exported after the call voice signal is let out wind energy and drop low wind noise processing to the call
Microphone.
5. Type C interface earphone according to claim 4, which is characterized in that described that low wind noise will also be dropped by microphone
The call voice signal afterwards is sent to first Dolby circuit to carry out noise reduction process and first Dolby circuit
By the call voice signal transmission after noise reduction to the micro controller unit, to carry out analog-to-digital conversion and digital-to-analogue conversion, and
By treated, simulation call voice signal is exported by the Type C interface to the terminal device, to send call to
Side.
6. Type C interface earphone according to claim 1, which is characterized in that the earphone further includes：
Noise reduction switch is connected to first Dolby circuit, for controlling whether the micro controller unit enters noise reduction mode.
7. Type C interface earphone according to claim 1, which is characterized in that the earphone further includes：
LED illuminating circuits communicate information to first Dolby circuit by the micro controller unit, and the LED is controlled to send out
The instruction state of optical circuit and LED light.
8. Type C interface earphone according to claim 1, which is characterized in that the earphone further includes：
Control circuit is connected to the micro controller unit by first Dolby circuit, command signal is sent by button,
The micro controller unit is output to by first Dolby circuit, to realize command function.
9. Type C interface earphone according to claim 8, which is characterized in that when the terminal device enters deep sleep
During state, described instruction signal is sent by the control circuit, the micro controller unit starts by waking up detection circuit
Wake up the terminal device.
10. a kind of implementation method of Type C interface earphone, which is characterized in that the described method includes：
Using Type C interface its voice signal transmitted is received from terminal device；
The voice signal is received using Type C interface described in microprogrammed control unit control；
Ambient noise is detected using feed forward noise reduction microphone；
The ambient noise signal of the feed forward noise reduction microphone output is received using the first Dolby circuit to carry out the first drop
It makes an uproar processing, and the ambient noise signal after noise reduction is transmitted to the micro controller unit；And
The micro controller unit is received using the second Dolby circuit treated analog voice signal to carry out at the second noise reduction
Reason, and the analog voice after the second noise reduction process is exported into signal output to loud speaker；
Wherein, the micro controller unit also carries out modulus turn to the ambient noise signal after the voice signal and the noise reduction
It changes with digital-to-analogue conversion process to generate the analog voice signal, and the analog voice signal is exported to second noise reduction
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068743.0A CN108063996A (en) | 2018-01-24 | 2018-01-24 | A kind of Type C interface earphone and its implementation |
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