CN105430543A - Digital microphone and electronic device - Google Patents
Digital microphone and electronic device Download PDFInfo
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- CN105430543A CN105430543A CN201610008978.1A CN201610008978A CN105430543A CN 105430543 A CN105430543 A CN 105430543A CN 201610008978 A CN201610008978 A CN 201610008978A CN 105430543 A CN105430543 A CN 105430543A
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- digital
- signal
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- voice
- microphone according
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a digital microphone and an electronic device. The digital microphone comprises a sensor for sensing sound signals; a preamplifier which is connected with the output of the sensor and receives simulation sound signals from the sensor; and a voice active detection apparatus which is used for detecting voice signals or noise signals, is connected with the output of the sensor and receives the simulation sound signals from the sensor, and is connected with the control end of the preamplifier so as to enable the preamplifier to be at a standby state when the noise signals are detected and start the preamplifier when the voice signals are detected. The digital microphone solves the technical problem of how to reduce power consumption of a conventional digital microphone. The digital microphone can be applied to an electronic device.
Description
Technical field
The present invention relates to microphone techniques, more specifically, relate to a kind of digital microphone and electronic equipment.
Background technology
Increasing intelligent electronic device has microphone, to receive phonetic entry and to produce audio signal.Usually, microphone circuit is always in running order, to receive user's input at any time.But the microphone meeting consumed power worked by this way, makes the operating time of electronic equipment shorten.
In the prior art, technical staff has attempted various ways to improve the power consumption of microphone.
Some technical staff attempt improving the design complexities of circuit itself, to reduce power consumption.Such as, convert the simulated audio signal sensed by transducer to digital signal foremost at microphone, thus only digital signal is processed later, to reduce the complexity of subsequent treatment, attempt thus reducing power consumption.
Other technical staff based on the process to digital signal, recognition of speech signals and noise signal, and control digital circuits section, make when noise signal, part number circuit is in holding state, thus reduce power consumption.
In addition, technical staff is also had to attempt to improve the transducer inputted for sense speech (or sensing part of microphone).Such as, the microphone MEMS chip of micro mechanical structure is adopted to carry out sense speech input.In addition, can also improve the micro mechanical structure of microphone MEMS chip, to reduce power consumption.
Therefore, the power consumption how reducing digital microphone is the technical problem that those skilled in the art attempt to solve all the time.
Summary of the invention
An object of the present invention is to provide a kind of new solution for digital microphone.
According to a first aspect of the invention, provide a kind of digital microphone, comprising: for the transducer of acoustic signals; Be connected with the output of transducer and receive the prime amplifier of the analoging sound signal of sensor; And for detecting the voice active detecting device of voice signal or noise signal, it is connected with the output of transducer and receives the analoging sound signal of sensor, and it is connected to make when noise signal being detected prime amplifier be in holding state with the control end of prime amplifier and starts prime amplifier when voice signal being detected.
Preferably, described digital microphone also comprises: be connected with the output of prime amplifier and the analoging sound signal received through prime amplifier pre-amplification to produce the analog to digital converter of digital audio and video signals; Wherein, described voice active detecting device is connected to make when noise signal being detected analog to digital converter be in holding state with the control end of analog to digital converter and starts analog to digital converter when voice signal being detected.
Preferably, described analog to digital converter is ∑-Δ analog to digital converter.
Preferably, described ∑-Δ analog to digital converter is the transducer producing PDM form or I2S format audio digital signal.
Preferably, described digital microphone also comprises: be connected with analog to digital converter and receive the digital filter of the digital audio and video signals from analog to digital converter; And to be connected with digital filter and to receive the circuit buffer memory of the digital audio and video signals through filtering.
Preferably, described digital microphone also comprises control and data-interface, wherein, this numeral and control interface export with the wake-up interrupts of voice active detecting device and are connected to export wakeup interrupt signal, and this numeral is connected and outputting digital audio signal with described circuit buffer memory with control interface.
Preferably, voice active detecting device exports wakeup interrupt signal when voice signal being detected.
Preferably, described digital microphone also comprises: be connected with control and data-interface the digital signal processor receiving described digital audio and video signals and wakeup interrupt signal, wherein, this digital signal processor is waken up from holding state when receiving wakeup interrupt signal.
Preferably, described digital microphone also comprises: be connected with digital signal processor and receive the application processor of described wakeup interrupt signal, wherein, described application processor is waken up from holding state when receiving wakeup interrupt signal.
According to a second aspect of the invention, provide a kind of electronic equipment, comprise according to digital microphone of the present invention.
A technique effect of the present invention is, can be reduced the power consumption of digital microphone by technical scheme of the present invention to a certain extent.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In the description combined and the accompanying drawing forming a part for specification shows embodiments of the invention, and illustrate that one is used from and explains principle of the present invention together with it.
Fig. 1 is the block diagram of digital microphone according to an embodiment of the invention.
Fig. 2 is the block diagram of digital microphone according to another embodiment of the invention.
Fig. 3 is the block diagram of electronic equipment according to another embodiment of the invention.
Embodiment
Various exemplary embodiment of the present invention is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Illustrate with reference to the accompanying drawings according to each embodiment of the present invention.
Fig. 1 shows the block diagram of digital microphone according to an embodiment of the invention.
As shown in Figure 1, digital microphone comprises transducer 1, prime amplifier (preamplifier) 2 and voice active detecting device 3.
Transducer 1 is for acoustic signals.Such as, transducer 1 can be micromachined microphones chip.
Prime amplifier 2 is connected with the output of transducer 1.It receives the analoging sound signal of sensor 1.Prime amplifier 2 pairs of analoging sound signals amplify.
Voice active detecting device 3 can detect voice signal or noise signal.Here, voice active detecting device is the device can distinguishing voice signal and noise signal from analog signal.Multiple voice active detecting device can be had in the prior art.Such as, voice active detecting device can detect voice signal or noise signal according to the spectrum signature of input signal and Energy distribution.Such as, the frequency spectrum comparison rule of voice signal.Owing to not being emphasis of the present invention to the improvement of voice active detecting device itself, therefore, its description is omitted at this.
In FIG, voice active detecting device 3 is connected with the output of transducer 1 and receives the analoging sound signal of sensor 1.It detects voice signal or noise signal from described analoging sound signal.Voice active detecting device 3 is connected to make when noise signal being detected prime amplifier be in holding state with the control end of prime amplifier 2 and starts prime amplifier when voice signal being detected.
In the prior art, use voice active detecting device assists the process to voice signal usually, such as, improves the recognition performance of voice.Such as, in the open CN1949364A of Chinese patent, a kind of system and method detecting identification degree of input speech signal is disclosed, for the recognition success rate of elevator system.But, in the present invention, utilize voice active detecting device to carry out the operating state of control amplifier, to reduce power consumption.
In addition, with carry out the mode of power control based on digital signal compared with, in the present invention, utilize the voice active detecting device based on analog signal, the speed detecting voice signal can be improved, thus wake operation can be performed more in time.
In addition, if carry out power control based on digital signal, then cannot perform control to the analog circuit of such as prime amplifier, or need extra technical scheme to control analog circuit.But, in the present invention, adopt the voice active detecting device based on analog signal can control analog circuit.This further reduces the power consumption of digital microphone to a certain extent.
In FIG, digital microphone also comprise to be connected with the output of prime amplifier 2 and the analoging sound signal received through prime amplifier pre-amplification to produce the analog to digital converter 4 of digital audio and video signals.Analog to digital converter 4 is such as ∑-Δ analog to digital converter.Analog to digital converter 4 such as can produce PDM form or I2S format audio digital signal.Preferably, described voice active detecting device 3 is connected with the control end of analog to digital converter 4, thus makes analog to digital converter 4 be in holding state when noise signal being detected, and starts analog to digital converter when voice signal being detected.
In FIG, digital microphone also comprises and to be connected with analog to digital converter 4 and to receive the digital filter 6 from the digital audio and video signals of analog to digital converter.Digital filter 6 is connected with circuit buffer memory 7.Circuit buffer memory 7 receives the digital audio and video signals through filtering from digital filter 6.
In FIG, also show control and data-interface 8.This numeral and control interface 8 export with the wake-up interrupts of voice active detecting device 3 and are connected to export wakeup interrupt signal.Such as, voice active detecting device 3 exports wakeup interrupt signal when voice signal being detected.This numeral and control interface 8 are also connected with described circuit buffer memory 7 and outputting digital audio signal.
Digital microphone shown in Fig. 1 can be connected to other circuit, to carry out subsequent treatment.
Fig. 2 is the block diagram of digital microphone according to another embodiment of the invention.The block diagram of Fig. 2 and the difference of Fig. 1 are, in fig. 2, also comprise digital signal processor (DSP) 9 and application processor (AP) 10.The description of part identical with Fig. 1 in Fig. 2 is omitted at this.
Digital signal processor 9 is connected to receive described digital audio and video signals and wakeup interrupt signal with control and data-interface 8.This digital signal processor 9 is waken up from holding state when receiving wakeup interrupt signal.
Application processor 10 is connected with digital signal processor 9.Preferably, application processor 10 also receives described wakeup interrupt signal.Described application processor 10 is waken up from holding state when receiving wakeup interrupt signal.
Fig. 3 is the block diagram of electronic equipment according to another embodiment of the invention.
In figure 3, electronic equipment 20 comprises microphone 21, loud speaker 22 and display screen 23.Electronic equipment 20 is such as mobile phone, panel computer etc.
Microphone 21 is such as according to digital microphone of the present invention, such as the digital microphone shown in Fig. 1 or 2.
By using according to digital microphone of the present invention, the power consumption of electronic equipment 20 can be made lower, make the stand-by time of electronic equipment 20 longer.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (10)
1. a digital microphone, comprising:
For the transducer of acoustic signals;
Be connected with the output of transducer and receive the prime amplifier of the analoging sound signal of sensor; And
For detecting the voice active detecting device of voice signal or noise signal, it is connected with the output of transducer and receives the analoging sound signal of sensor, and it is connected to make when noise signal being detected prime amplifier be in holding state with the control end of prime amplifier and starts prime amplifier when voice signal being detected.
2. digital microphone according to claim 1, also comprises:
Be connected with the output of prime amplifier and the analoging sound signal received through prime amplifier pre-amplification to produce the analog to digital converter of digital audio and video signals;
Wherein, described voice active detecting device is connected to make when noise signal being detected analog to digital converter be in holding state with the control end of analog to digital converter and starts analog to digital converter when voice signal being detected.
3. digital microphone according to claim 2, wherein, described analog to digital converter is ∑-Δ analog to digital converter.
4. digital microphone according to claim 3, wherein, described ∑-Δ analog to digital converter is the transducer producing PDM form or I2S format audio digital signal.
5. digital microphone according to claim 2, also comprises:
Be connected with analog to digital converter and receive the digital filter of the digital audio and video signals from analog to digital converter; And
Be connected with digital filter and receive the circuit buffer memory of the digital audio and video signals through filtering.
6. digital microphone according to claim 5, also comprise control and data-interface, wherein, this numeral and control interface export with the wake-up interrupts of voice active detecting device and are connected to export wakeup interrupt signal, and this numeral is connected and outputting digital audio signal with described circuit buffer memory with control interface.
7. digital microphone according to claim 6, wherein, voice active detecting device exports wakeup interrupt signal when voice signal being detected.
8. digital microphone according to claim 7, also comprise: be connected to receive the digital signal processor of described digital audio and video signals and wakeup interrupt signal with control and data-interface, wherein, this digital signal processor is waken up from holding state when receiving wakeup interrupt signal.
9. digital microphone according to claim 8, also comprises: be connected with digital signal processor and receive the application processor of described wakeup interrupt signal, wherein, described application processor is waken up from holding state when receiving wakeup interrupt signal.
10. an electronic equipment, comprises digital microphone according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008978.1A CN105430543A (en) | 2016-01-07 | 2016-01-07 | Digital microphone and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008978.1A CN105430543A (en) | 2016-01-07 | 2016-01-07 | Digital microphone and electronic device |
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| Publication Number | Publication Date |
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| CN105430543A true CN105430543A (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610008978.1A Pending CN105430543A (en) | 2016-01-07 | 2016-01-07 | Digital microphone and electronic device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358159A (en) * | 2017-01-26 | 2018-08-03 | 英飞凌科技股份有限公司 | MEMS（MEMS）Circuit and for reconstruct interference parameter method |
| CN110100259A (en) * | 2016-12-30 | 2019-08-06 | 美商楼氏电子有限公司 | Microphone assembly with certification |
| CN112885339A (en) * | 2019-11-14 | 2021-06-01 | 杭州智芯科微电子科技有限公司 | Voice awakening system and voice recognition system |
| CN113411723A (en) * | 2021-01-13 | 2021-09-17 | 神盾股份有限公司 | Voice assistant system |
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| CN201518536U (en) * | 2009-09-14 | 2010-06-30 | 华为终端有限公司 | Audio control circuit and terminal equipment |
| US20130223646A1 (en) * | 2012-02-23 | 2013-08-29 | Chuan-Fu Lee | Speaker control method and speaker control system |
| CN103677198A (en) * | 2012-09-03 | 2014-03-26 | 联想(北京)有限公司 | Electronic equipment control method and electronic equipment |
| CN104464737A (en) * | 2013-09-12 | 2015-03-25 | 联发科技股份有限公司 | Voice verifying system and voice verifying method |
| CN104918178A (en) * | 2014-03-10 | 2015-09-16 | 英飞凌科技股份有限公司 | System and method for transducer system with wakeup detection |
| CN105430564A (en) * | 2014-09-16 | 2016-03-23 | 恩智浦有限公司 | Mobile device |
| CN205408096U (en) * | 2016-01-07 | 2016-07-27 | 歌尔声学股份有限公司 | Digital microphone wind and electronic equipment |
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| CN201518536U (en) * | 2009-09-14 | 2010-06-30 | 华为终端有限公司 | Audio control circuit and terminal equipment |
| US20130223646A1 (en) * | 2012-02-23 | 2013-08-29 | Chuan-Fu Lee | Speaker control method and speaker control system |
| CN103677198A (en) * | 2012-09-03 | 2014-03-26 | 联想(北京)有限公司 | Electronic equipment control method and electronic equipment |
| CN104464737A (en) * | 2013-09-12 | 2015-03-25 | 联发科技股份有限公司 | Voice verifying system and voice verifying method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110100259A (en) * | 2016-12-30 | 2019-08-06 | 美商楼氏电子有限公司 | Microphone assembly with certification |
| CN108358159A (en) * | 2017-01-26 | 2018-08-03 | 英飞凌科技股份有限公司 | MEMS（MEMS）Circuit and for reconstruct interference parameter method |
| CN112885339A (en) * | 2019-11-14 | 2021-06-01 | 杭州智芯科微电子科技有限公司 | Voice awakening system and voice recognition system |
| CN113411723A (en) * | 2021-01-13 | 2021-09-17 | 神盾股份有限公司 | Voice assistant system |
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Address after: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Applicant after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Applicant before: Goertek Inc. |
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Application publication date: 20160323 |
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