CN108810685A - A kind of digital microphone - Google Patents
A kind of digital microphone Download PDFInfo
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- CN108810685A CN108810685A CN201810573620.2A CN201810573620A CN108810685A CN 108810685 A CN108810685 A CN 108810685A CN 201810573620 A CN201810573620 A CN 201810573620A CN 108810685 A CN108810685 A CN 108810685A
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- digital microphone
- register
- processing chip
- audio frequency
- frequency process
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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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
- G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
- G06F3/165—Management of the audio stream, e.g. setting of volume, audio stream path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of digital microphones to include：Controller and digital microphone processing chip；The controller is electrically connected with the digital microphone processing chip, for sending control signal according to default communication protocol to the digital microphone processing chip；The digital microphone processing chip is built-in with microprocessor and audio frequency process register, the microprocessor is electrically connected with the audio frequency process register, the microprocessor is used to parse the control signal according to the default communication protocol, obtain configuration parameter, the configuration parameter is for specifying and configuring the audio frequency process register, it is determined in a manner of audio frequency process by according to the configuration parameter, by increasing controller and according to default communication protocol transmission of control signals, simplifying circuit, cost declining, high-fidelity and expansible technique effect to realize.
Description
Technical field
The present embodiments relate to Digital Electronic Technique field more particularly to a kind of digital microphones.
Background technology
Microphone is more and more common in people's lives, brings many facilities.
A kind of digital microphone in the prior art can not carry out digital microphone input sensitivity and output sound due to user
Amount is adjusted, and in practical applications, the difference of sound source distance or sound source size is to the different requirement of sensitivity requirement, for example, single
People's requirement sensitivity is low, more people's requirement high sensitivities, musical instrument recording request high sensitivity, so fixed sensitivity is given
Using bringing inconvenience.
In order to solve this problem, in the prior art, increased by additionally increasing the control circuit that gain is amplified with volume
Add the function of input sensitivity and output volume adjusting, but the member control circuit realizes complexity, for example, sensitivity is to pass through
Realized increasing hardware amplifying circuit, and between microphone and digital processing chip additional increased circuit, be equivalent to by
Voice signal has carried out one layer of processing more, to damage sound effect, in addition, increasing the complexity of circuit, also increases noise
Source introduces approach with noise, further damages sound effect.
Invention content
The present invention provides a kind of digital microphone, to realize the technology effect for simplifying circuit, reducing cost, increasing scalability
Fruit.
An embodiment of the present invention provides a kind of digital microphone, which includes：Controller and digital microphone handle core
Piece；
The controller is electrically connected with the digital microphone processing chip, for the digital microphone processing chip according to
Default communication protocol sends control signal；
The digital microphone processing chip is built-in with microprocessor and audio frequency process register, the microprocessor with it is described
Audio frequency process register is electrically connected, and the microprocessor is used to parse the control signal according to the default communication protocol, obtains
To configuration parameter, the configuration parameter is for specifying and configuring the audio frequency process register, with true according to the configuration parameter
Accordatura frequency processing mode.
Optionally, the digital microphone further includes：Microphone, the microphone are electrically connected with the digital microphone processing chip,
For carrying out acoustic-electric conversion to the voice signal received, and obtain corresponding first audio signal.
Optionally, the audio frequency process register includes automatic gain register；
The digital microphone processing chip is used for according to the configuration parameter configuration automatic gain register, with according to
The voice signal that microphone described in automatic gain register pair receives carries out automatic gain.
Optionally, the audio frequency process register includes sensitivity register；
The digital microphone processing chip is used for according to the configuration parameter configuration sensitivity register, with according to the spirit
Sensitivity register adjusts the sensitivity that the microphone receives the voice signal.
Optionally, the digital microphone further includes：Data transmission interface, the audio frequency process register include that tone color is adjusted
Register；
The digital microphone processing chip is used to adjust register according to the configuration parameter configuration tone color, with according to
Tone color adjusts the first audio signal described in register pair and carries out tone color adjusting, obtains the second audio signal；
The data transmission interface is electrically connected with the digital microphone processing chip, for the digital microphone to be handled core
Piece transmits next second audio signal transmission to the first external equipment.
Optionally, the digital microphone further includes：Audio output interface；
The data transmission interface is additionally operable to receive third audio signal from the first external device；
The digital microphone chip third audio signal is handled according to the audio frequency process mode after with
Two audio signals merge, and generate the 4th audio signal；
The audio output interface is electrically connected with the digital microphone processing chip, for passing the 4th audio signal
Transport to the second external equipment.
Optionally, the audio frequency process register includes volume adjustment register；
The digital microphone processing chip is used for according to the configuration parameter configuration volume adjustment register, with according to
Volume adjustment register adjusts the volume of the second external equipment.
Optionally, the audio frequency process register includes mute register；
The digital microphone processing chip is used for according to the mute register of the configuration parameter configuration, with according to described mute
Register controls that the microphone is mute or the audio output interface is mute.
Optionally, the controller is circumscribed with potentiometer and/or button, and the potentiometer and/or button are tactile for being arranged
It sends out controller described and generates the control signal.
Optionally, the controller is circumscribed with display, the status information for showing the digital microphone, the state
Information includes the information generated according to the control signal.
The present invention digital microphone include：Controller and digital microphone processing chip, controller handle core with digital microphone
Piece is electrically connected, for sending control signal according to default communication protocol to digital microphone processing chip；Digital microphone processing chip
It is built-in with microprocessor and audio frequency process register, microprocessor is electrically connected with audio frequency process register, and microprocessor is for pressing
The control signal is parsed according to the default communication protocol, obtains configuration parameter, the configuration parameter is for specifying and configuring sound
Frequency processing register determines in a manner of audio frequency process solve because increasing digital microphone control function by according to the configuration parameter
Caused by circuit the problem of circuit high complexity, high cost and introducing noise source, to realize simplified circuit, reduce cost, height
Fidelity and the technique effect for increasing scalability.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of digital microphone provided in an embodiment of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of digital microphone provided in an embodiment of the present invention, and the present embodiment is applicable to number
Signal processing situation, specifically, sound can be carried out to the voice signal received according to the default processing mode of the digital microphone
Frequency is handled, and result is exported, as shown in Figure 1, the digital microphone is specifically included with lower structure：At controller 1 and digital microphone
Manage chip 2.
Controller 1 is electrically connected with digital microphone processing chip 2, is used for digital microphone processing chip 2 according to default communication
Agreement sends control signal.
Wherein, controller 1 is for generating control signal, and the control signal is for controlling digital microphone processing chip 2, number
Microphone processing chip 2 is used to be configured according to control signal, and then carries out audio frequency process according to the result of configuration.
Further, the control chip of microcontroller type may be used in controller 1, and microcontroller is a kind of ic core
Piece, be using very large scale integration technology with data-handling capacity central processing unit, random access memory, read-only deposit
Reservoir, a variety of input/output interfaces and interrupt system, the functions such as timer/counter (may further include display driver circuit, arteries and veins
The circuits such as wide modulation circuit, analog multiplexer, digital analog converter) to be integrated into one constituted on one piece of silicon chip small and perfect
Microcomputer system.The present embodiment is not construed as limiting the type of controller, and illustratively, controller 1 may be used 8051
The microcontroller of series.
In general, audio frequency process special chip can be used in digital microphone processing chip 2, can be applied to earphone, loud speaker and
The application of microphone has the functions such as digital-to-analogue conversion, automatic growth control and output tone color adjusting.The present embodiment is to digital microphone
The type of processing chip 2 is not construed as limiting, and illustratively, the audio processing chip of model cm6533 can be used in the present embodiment,
Cm6533 uses the design of 8051 controllers built in USB2 audio chips, is integrated with binary channels digital-to-analogue/analog-to-digital conversion module, more simultaneous
Hold a variety of common buses, such as I2C buses, the application of earphone, loud speaker and microphone may be implemented.
In the present embodiment, controller 1 sends the control signal according to default communication protocol for generating control signal
To the digital microphone processing chip 2 being connected electrically, to realize the control to digital microphone processing chip 2 in software view,
It is set to be handled audio signal according to audio frequency process mode, on the one hand, to save the cost of complicated circuit structure, another party
Face reduces the design difficulty of hardware due in addition not increasing the circuit of audio frequency process.It is improved from the level of software, more
It is convenient that iteration is updated to function in the future.And since controller 1 is using the control chip of microcontroller type, it may be convenient to
Carry out the extension of peripheral hardware.
Further, control signal includes control instruction, parameter and data.Control instruction includes audio frequency process mode point
Class, read parameter and special replys mark etc., audio frequency process mode can be mute control, adjustment of sensitivity, volume adjustment, oneself
The processing mode of dynamic gain-adjusted and one or more combinations in tone color adjusting, it is to above-mentioned audio that audio frequency process mode, which is classified,
The further classification of processing mode, is such as classified as same class by volume adjustment and adjustment of sensitivity.Parameter for determining control channel,
Each control channel corresponds to a kind of above-mentioned audio frequency process mode, and control channel includes at least mute control, adjustment of sensitivity, sound
Amount is adjusted, automatic gain control and tone color are adjusted.Data are the numerical value that the control channel is correspondingly arranged.Such as instruction expression
Audio frequency process mode is classified as volume adjustment and is controlled with gain, and parameter further determines that control channel is volume adjustment or sensitivity
It adjusts, if control channel is volume adjustment, parameter is additionally operable to determine the sound channel (such as left and right acoustic channels) of effect, and data then correspond to volume
Size.If adjustment of sensitivity, parameter then is used to determine the microphone of effect, and data are then yield values.
Wherein, it presets communication protocol to be encoded to obtain binary sequence by signal is controlled, each in binary sequence is all
It is 1 or 0, default communication protocol is additionally operable to define the meaning representated by each, and digital microphone processing chip and controller are adopted
The coding to controlling signal and decoding are carried out with same set of default communication protocol, the process of decoding, the present embodiment is also using parsing
Saying.
Illustratively, the default communication protocol concrete form in part is as shown in table 1, and the bit in table indicates that position, bit4 indicate control
The 5th of signal processed, bit3:0 indicates the 1st to the 4th of control signal, and byte indicates that byte, 1byte are equivalent to 8bit.
The coding that signal is controlled shown in table 1 includes two bytes, and first character section indicates data, second byte representation control instruction
And parameter.Wherein, control signal 1 and control signal 2 determine audio frequency process mode, control for controlling digital microphone processing chip 2
Signal 3 processed and control signal 4 are used to obtain the status information of digital microphone processing chip 2.
Table 1
Digital microphone processing chip 2 is built-in with microprocessor (not shown) and audio frequency process register (not shown), micro- place
Reason device is electrically connected with audio frequency process register, and microprocessor is used to parse control signal according to default communication protocol, is configured
Parameter, the configuration parameter is for specifying and configuring the audio frequency process register, to determine audio frequency process according to configuration parameter
Mode.
Wherein, microprocessor (not shown) is the embedded micro-processor of digital microphone processing chip 2, is mainly used for and controls
Device 1 is communicated according to default communication protocol, to receive and parse the control signal that controller 1 sends over, and then basis
Configuration parameter in the control signal carries out the configuration of digital microphone processing chip 2, to determine in a manner of audio frequency process.Audio frequency process
Register is the built in hardware resource for belonging to digital microphone processing chip 2, and quantity is at least one, can be used for preserving at audio
The related data of reason.Configuration parameter includes the corresponding content configuration of specified audio frequency process register and audio frequency process register,
It is obtained from the parameter and data controlled in signal.It, can be with specifically, according to configuration parameter is specified and configuration audio frequency process register
Determine the working method of digital microphone processing chip 2, including audio frequency process mode.Illustratively, digital microphone processing chip 2 exists
In the course of work, content can be written to relevant audio frequency process register according to configuration parameter, be deposited later according to audio frequency process
The content of device carries out the setting of circuit logic in chip, to realize corresponding function.Audio frequency process mode is by configuring audio
Processing register is determined.
It should be noted that each control channel corresponds to one or more audio frequency process registers, the present embodiment is to sound
The set-up mode of frequency processing register and the correspondence of control channel is not construed as limiting, can be by digital microphone processing chip
Burning code is configured in flash memory built in 2, can also be the default setting of digital microphone processing chip 2.With default setting
For illustrate, circuit logic in default setting, that is, digital microphone processing chip 2 setting, wherein circuit logic setting refers to
, audio frequency process register corresponds to corresponding audio frequency processing circuit, and the content of audio frequency process register determines audio frequency process
The circuit logic of circuit.Such as adjustment of sensitivity function, there is relevant amplifying circuit in digital microphone processing chip 2, in number
In the hardware design of word microphone processing chip 2, the content of audio frequency process register is associated with the combination of resistance in amplifying circuit,
It can be with the amplification factor of indirect control amplifying circuit, to have the function that microphone adjustment of sensitivity.
The technical solution of the present embodiment, digital microphone include：Controller and digital microphone processing chip, controller and number
Microphone processing chip is electrically connected, for sending control signal according to default communication protocol to digital microphone processing chip；Number words
Cylinder processing chip is built-in with microprocessor and audio frequency process register, and microprocessor is electrically connected with audio frequency process register, micro- place
It manages device to be used to parse the control signal according to the default communication protocol, obtains configuration parameter, the configuration parameter is for referring to
Fixed and configuration audio frequency process register is determined in a manner of audio frequency process by according to the configuration parameter, by increase controller and is pressed
According to default communication protocol transmission of control signals, it is high complicated to solve the circuit caused by increasing digital microphone control function circuit
Property, high cost and introduce noise source the problem of, with realize simplify circuit, reduce cost, high-fidelity and increase scalability skill
Art effect.
Based on the above technical solution, digital microphone further includes：Microphone 3, microphone 3 and digital microphone processing chip 2
Electrical connection for carrying out acoustic-electric conversion to the voice signal received, and obtains corresponding first audio signal.
Wherein, microphone 3 is also known as microphone or microphone, is the energy conversion device that voice signal is converted to electric signal.
First audio signal, i.e. voice signal pass through 3 transformed electric signal of microphone.
Specifically, the present embodiment is not construed as limiting the type of microphone 3, coil inductance formula or electret may be used in microphone 3
Condenser type is illustrated so that microphone 3 is electret microphone as an example, is made of vibrating diaphragm and pole plate there are one inside electret microphone
Capacitor because filled with charge on vibrating diaphragm, therefore when vibrating diaphragm is acted on by sound pressure, vibrating diaphragm piece will generate vibration, to
The distance between vibrating diaphragm and pole plate are changed, to change the distance between two pole plates of capacitor, since charging charge is solid
It is fixed constant, therefore necessarily lead to the variation of a voltage.To realize the acoustic-electric conversion of voice signal.
Based on the above technical solution, audio frequency process register includes automatic gain register.
Wherein, automatic gain register forms correspondence with automatic gain control function, and automatic growth control is to instigate
The autocontrol method of amplifying circuit in digital microphone processing chip 2 adjusted Gain Automaticly with signal strength.Automatically
Gain register includes at least one audio frequency process register.
Digital microphone processing chip 2 is used for according to the configuration parameter configuration automatic gain register, to be increased according to automatic
The voice signal that beneficial register pair microphone 3 receives carries out automatic gain.
Illustratively, the content of automatic gain register storage can be the scheme serial number of automatic growth control, such as scheme 1
Corresponding threshold value is 5, when voice signal is less than threshold value, yield value 5；2 corresponding threshold value of scheme is 10, when voice signal is low
When threshold value, yield value 1.5.It is provided in digital microphone processing chip 2 automatic with automatic gain register correspondence
Gain amplifying circuit and comparison circuit, amplifying circuit have different amplification factor settings, are selected according to the yield value in scheme
It selects, comparison circuit has different threshold values, is selected according to the threshold value in scheme.Such as when the content of automatic gain register storage is
When the serial number of scheme 1, when voice signal input is 4, value is less than 5, and yield value 5, i.e., amplified value is 20；Work as sound
When signal input is 6, value is more than 5, and output valve is still 6.
Based on the above technical solution, audio frequency process register includes sensitivity register.
Wherein, sensitivity register forms correspondence with adjustment of sensitivity.Adjustment of sensitivity is the sensitive of adjusting microphone 3
Degree, by the way that sensitivity is turned up so that microphone 3 can detect the weaker voice signal of the sound intensity.Sensitivity register includes at least
One audio frequency process register, a sensitivity register pair answer a microphone 3.
Digital microphone processing chip 2 is used for according to the configuration parameter configuration sensitivity register, to be posted according to sensitivity
Storage adjusts the sensitivity that microphone 3 receives the voice signal.
Illustratively, in digital microphone processing chip 2, in order to enable digital microphone processing chip 2 can realize sensitivity
The function of adjusting can use one 8 audio frequency process registers to establish correspondence as with adjustment of sensitivity function, microphone is increased
The setting value of beneficial value is written in the audio frequency process register, and digital microphone processing chip 2 is according to the increasing stored in register later
Benefit value setting value, is configured the circuit logic of microphone gain section in chip, to realize the function of adjustment of sensitivity.
Based on the above technical solution, digital microphone further includes：Data transmission interface 4, the audio frequency process deposit
Device includes that tone color adjusts register.
Wherein, tone color register forms correspondence with tone color regulatory function.Tone color adjusting is each by balanced device adjustment
The yield value of frequency band signals.Tone color register includes at least one audio frequency process register, and each audio frequency process register pair is answered
The yield value of the signal of different frequency range, specifically, the frequency corresponding to audio frequency process register can be carried out according to actual demand
Setting.
Digital microphone processing chip 2 is used to adjust register according to configuration parameter configuration tone color, to be posted according to tone color adjusting
The first audio signal of storage pair carries out tone color adjusting, obtains the second audio signal.
Illustratively, in digital microphone processing chip 2, in order to enable digital microphone processing chip 2 can realize tone color tune
The function of section is illustrated by taking two 8 audio frequency process registers as an example, the content point of two audio frequency process registers storage
The tone color is written in the setting value of the yield value obtained according to control signal by the yield value for not corresponding to the frequency of 1KHz and 10KHz
It adjusts in register, digital microphone processing chip 2 adjusts the gain value settings value stored in register according to tone color later, to core
The circuit logic of piece middle pitch tone section part is configured, to realize the function of tone color adjusting.Such as the corresponding tone color tune of 1KHz
Content in section register is that the content that the corresponding tone colors of 10,10KHz are adjusted in register is 5, the first audio signal 1KHz's
Value is 10, and the value of the first audio signal 10KHz is 5, then the value of treated the second audio signal 1KHz is 100, and treated
The and the value of audio signal 10KHz is 25.
Data transmission interface 4 is electrically connected with digital microphone processing chip 2, for transmitting digital microphone processing chip 2
The second audio signal transmission to the first external equipment.
Wherein, data transmission interface 4 can be Universal Serial Bus Interface (Universal Serial Bus, USB) and
It is deformed, such as Type-C USB.Data transmission interface 4 can be used for connecting the first external equipment, and digital microphone is handled core
The second audio signal transmission to the first external equipment that the transmission of piece 2 comes.
Further, the first external equipment is provided with power amplifier, and the first external equipment can be that computer, tablet, speaker etc. are set
The equipment for being equipped with power amplifier.By being provided with power amplifier in the first external equipment, the second audio signal can be played.
Based on the above technical solution, digital microphone further includes：Audio output interface 5.
Wherein, the audio interface of 3.5mm may be used in audio output interface 5, is used for external second external equipment.
Data transmission interface 4 is additionally operable to receive third audio signal from the first external device.
Wherein, data transmission interface 4 is two-way communication, can complete the operation for uploading and downloading.Such as set from first external world
It is standby to receive third audio signal, to complete the operation downloaded.Specifically, the third audio signal in the first external equipment is led to
The transmission of data transmission interface 4 is crossed to be sent to data microphone processing chip 2 and handled further according to audio frequency process mode.
Digital microphone chip 2 closes after being handled according to audio frequency process mode third audio signal with the second audio signal
And generate the 4th audio signal.
Wherein, audio frequency process mode can be that tone color is adjusted.
Audio output interface is electrically connected with digital microphone processing chip 2, and being used for will be outside the 4th audio signal transmission to second
Connect equipment.
Wherein, the second external equipment can be earphone, and earphone receives and play the audio signal of digital microphone chip output,
Certain second external equipment can also be the equipment with power amplifier.
By the setting of audio output interface, the function of monitoring is provided for digital microphone.
Based on the above technical solution, audio frequency process register includes volume adjustment register.
Wherein, volume adjustment register forms correspondence with volume adjusting function.Volume adjustment register includes at least
One audio frequency process register.
Digital microphone processing chip 2 is used for according to configuration parameter configuration volume adjustment register, to be posted according to volume adjustment
Storage adjusts the volume of the second external equipment.
It, will be to carry out the detailed of digital microphone workflow for the volume adjusting function for realizing two-channel in the present embodiment
Illustrate, controller 1 generates and the relevant control signal of two-channel volume adjusting function, and the control instruction in the control signal indicates
Volume adjustment is controlled with gain, and parameter indicates that the two-channel (including left and right acoustic channels) of volume adjustment and effect, data indicate volume
Size, such as 9, and then the control signal is subjected to coded transmission to the number being electrically connected with controller 1 by default communication protocol
Word microphone processing chip 2, digital microphone processing chip 2 parse the control signal in turn, from the parameter and data of control signal
In obtain configuration parameter, which specifies audio frequency process register group corresponding with volume adjusting function and audio frequency process
The setting value of each audio frequency process register, i.e., each audio frequency process register represent the volume of a sound channel in register group,
Left and right acoustic channels, then there are two audio frequency process register, wherein setting value data 9 in signal in order to control.The setting value is written
Afterwards, digital microphone processing chip 2 is according to the setting value stored in audio frequency process register, to corresponding with volume adjustment in chip
The circuit logic of system is configured so that the function that it is 9 by output volume adjusting that digital microphone processing chip 2, which has,.Number words
Cylinder processing chip 2, which receives, simultaneously responds the control signal for having volume adjusting function, so pair with volume adjusting function corresponding relationship
Volume adjustment register configured, so that it is determined that the audio frequency process mode of digital microphone processing chip 2 includes volume adjustment.
The volume adjustment of second external equipment is 9 by digital microphone processing chip 2.
Based on the above technical solution, audio frequency process register includes mute register.
Wherein, mute register includes at least one audio frequency process register.
Digital microphone processing chip 2 is used for according to the mute register of the configuration parameter configuration, with according to mute register
Control microphone 3 is mute or audio output interface 5 is mute.
Wherein, each in mute register can represent microphone 3 or the state of audio output interface 5, such as numerical value 1
To be mute, 0 is non-mute.
By the way that the independent register of multiple corresponding functions is arranged, digital microphone chip can be facilitated to be carried out by software definition
The control of hardware resource, and then audio frequency process is carried out using the hardware resource inside digital microphone processing chip, without further
Build audio frequency processing circuit.
Based on the above technical solution, controller 1 is circumscribed with potentiometer and/or button, and potentiometer and/or button are used
Control signal is generated in setting trigger controller 1.
Wherein, potentiometer and/or button can be used for being arranged instruction, parameter and the data in control signal, specifically, control
Device 1 processed detects the state of potentiometer and/or button, obtains instruction, parameter and the data in determining control signal.Such as Fig. 1 institutes
Show, by controller 1 it is external be potentiometer 6 for illustrate, for the potentiometer 6 for adjusting volume, then the detection of controller 1 should
The state of potentiometer 6, acquisition are the setting value of volume, and then generate corresponding control signal.
By the setting of potentiometer and/or button, interaction is provided to the user, user's trigger controller is facilitated to generate control letter
Number, so that digital microphone processing chip handles the first audio signal according to default processing mode.
Based on the above technical solution, controller 1 is circumscribed with display 7, is used for the status information of digital microphone, shape
State information includes the status information generated according to control signal.
Wherein, status information can be the configuration of digital microphone processing chip 2, can be generated according to control signal, in table 1
Control signal 3 and control signal 4, specifically, controller 1 generates the configuration (parameter) for reading digital microphone processing chip 2
Signal is controlled, and then the configuration that digital microphone processing chip 2 is fed back is shown over the display.To display in the present embodiment
Type is not construed as limiting, and can be liquid crystal display.
By increasing display, it can show that the digital microphone processing chip 2 got configures at any time, and then increase user
Experience.
Based on the above technical solution, display 7 is touch display, for triggering control to be arranged by virtual key
Device 1 processed generates control signal.
Wherein, the present embodiment is not construed as limiting the type of touch display, can be infrared touch display screen, capacitance touch
Display screen and resistive touch display screen etc. have the display screen of touch function.Controller 1 is arranged by detecting in touch display
On virtual key state, instruction, parameter and the data in control signal are obtained, for example, the virtual key is for adjusting sound
It measures, then controller 1 detects whether virtual key is clicked, and obtains the setting value of volume, and then generates corresponding control signal.
Based on the above technical solution, digital microphone processing chip 2 is formed by line with controller 1 by being electrically connected
Road is that analogue I2C bus or universal asynchronous receiving-transmitting transmitter (Universal Asynchronous may be used
Receiver/Transmitter, UART) bus or other communication lines.
Based on the above technical solution, the quantity of microphone 3 is at least one.
Wherein, 3 forming array formula microphone of multiple microphones may be implemented multi-channel sound signal acquisition, reach stereosonic
Effect.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments here, can carry out for a person skilled in the art it is various it is apparent variation, again
Adjustment and replacement are without departing from protection scope of the present invention.Therefore, although by above example to the present invention carried out compared with
For detailed description, but the present invention is not limited only to above example, without departing from the inventive concept, can be with
Including other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of digital microphone, which is characterized in that including：Controller and digital microphone processing chip；
The controller is electrically connected with the digital microphone processing chip, is used for the digital microphone processing chip according to default
Communication protocol sends control signal；
The digital microphone processing chip is built-in with microprocessor and audio frequency process register, the microprocessor and the audio
Processing register is electrically connected, and the microprocessor is used to parse the control signal according to the default communication protocol, is matched
Parameter is set, the configuration parameter is for specifying and configuring the audio frequency process register, to determine sound according to the configuration parameter
Frequency processing mode.
2. digital microphone according to claim 1, which is characterized in that the digital microphone further includes：Microphone, the microphone
It is electrically connected with the digital microphone processing chip, for carrying out acoustic-electric conversion to the voice signal received, and obtains corresponding
First audio signal.
3. digital microphone according to claim 2, which is characterized in that the audio frequency process register includes that automatic gain is posted
Storage；
The digital microphone processing chip is used for according to the configuration parameter configuration automatic gain register, with according to described automatic
Gain register carries out automatic gain to the voice signal that the microphone receives.
4. digital microphone according to claim 2, which is characterized in that the audio frequency process register includes sensitivity deposit
Device；
The digital microphone processing chip is used for according to the configuration parameter configuration sensitivity register, with according to the sensitivity
Register adjusts the sensitivity that the microphone receives the voice signal.
5. digital microphone according to claim 2, which is characterized in that the digital microphone further includes：Data transmission interface,
The audio frequency process register includes that tone color adjusts register；
The digital microphone processing chip is used to adjust register according to the configuration parameter configuration tone color, with according to the tone color
It adjusts the first audio signal described in register pair and carries out tone color adjusting, obtain the second audio signal；
The data transmission interface is electrically connected with the digital microphone processing chip, for passing the digital microphone processing chip
It is defeated come second audio signal transmission to the first external equipment.
6. digital microphone according to claim 5, which is characterized in that the digital microphone further includes：Audio output interface；
The data transmission interface is additionally operable to receive third audio signal from the first external device；
The digital microphone chip third audio signal is handled according to the audio frequency process mode after with the second sound
Frequency signal merges, and generates the 4th audio signal；
The audio output interface is electrically connected with the digital microphone processing chip, is used for the 4th audio signal transmission extremely
Second external equipment.
7. digital microphone according to claim 6, which is characterized in that the audio frequency process register includes that volume adjustment is posted
Storage；
The digital microphone processing chip is used for according to the configuration parameter configuration volume adjustment register, with according to the volume
Adjust the volume that register adjusts the second external equipment.
8. digital microphone according to claim 6, which is characterized in that the audio frequency process register includes mute deposit
Device；
The digital microphone processing chip is used for according to the mute register of the configuration parameter configuration, with according to the mute deposit
Device controls that the microphone is mute or the audio output interface is mute.
9. digital microphone according to claim 1, which is characterized in that the controller is circumscribed with potentiometer and/or button,
The potentiometer and/or button trigger the controller generation control signal for being arranged.
10. digital microphone according to claim 1, which is characterized in that the controller is circumscribed with display, for showing
The status information of the digital microphone, the status information include the information generated according to the control signal.
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