CN203984647U - There is the microphone that voice activation detects - Google Patents
There is the microphone that voice activation detects Download PDFInfo
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- CN203984647U CN203984647U CN201420021954.6U CN201420021954U CN203984647U CN 203984647 U CN203984647 U CN 203984647U CN 201420021954 U CN201420021954 U CN 201420021954U CN 203984647 U CN203984647 U CN 203984647U
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- 238000012360 testing method Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
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Abstract
The utility model relates to voice process technology field, is specifically related to a kind of microphone.Have the microphone that voice activation detects, comprise a microphone main body, microphone main body comprises, at least one transducer, and transducer connects a testing circuit; The signal output part of testing circuit connects a controller; Transducer is used for collected sound signal, and is converted to signal of telecommunication output; Testing circuit is processed the output signal of transducer, and whether the voice signal that judgement gathers drops in a predetermined frequency range, and exports a court verdict; Controller receives court verdict, and determines whether microphone main body is waken up from sleep pattern.The utility model can reduce meaningless power consumption, saves energy, and in the time meeting certain condition, microphone main body is activated from sleep pattern, enters normal mode of operation.
Description
Technical field
The utility model relates to voice process technology field, is specifically related to a kind of microphone.
Background technology
Along with the development of the electronic products such as mobile terminal, people are also more and more higher to the requirement of speech communication, wish that electronic product obtains more and more higher acoustical behavior.But the microphone of prior art powers on and starts working, under idle condition, also can consume meaningless power, be unfavorable for the energy saving of mobile terminal.
In field of voice signal, there is a kind of technology that voice activity is detected, be called voice activation and detect (VAD, Voice Activity Detection), whether it has voice to exist by detecting when voice communication or in one section of language material, the accuracy of judgement can directly affect the subsequent treatment quality of (as speech coding, speech recognition or voice strengthen), and microphone of the prior art does not also possess this function.
Utility model content
The purpose of this utility model is, a kind of microphone that voice activation detects that has is provided, and solves above technical problem.
The technical problem that the utility model solves can realize by the following technical solutions:
Have the microphone that voice activation detects, it is characterized in that, comprise a microphone main body, described microphone main body comprises,
At least one transducer, described transducer connects a testing circuit; The signal output part of described testing circuit connects a controller;
Described transducer is used for collected sound signal, and is converted to signal of telecommunication output; Described testing circuit is processed the output signal of described transducer, and whether the voice signal that judgement gathers drops in a predetermined frequency range, and exports a court verdict; Described controller receives described court verdict, and determines whether described microphone main body is waken up from sleep pattern.
Preferably, between described transducer and described testing circuit, also comprise a level detection unit, the signal output part of described transducer connects described level detection unit;
Described level detection unit has a setting range, described level detection unit compares the level of described transducer output signal and described setting range, in the time that the level of described transducer output signal is positioned at described setting range, send an activation signal to described testing circuit, activate described testing circuit work.
Preferably, described testing circuit comprises N signal processing channel in parallel, and each described signal processing channel comprises a band pass filter, a signal energy estimator, an A/D converter; The band pass filter of each described signal processing channel has different central angle frequencies;
Wherein, described N is greater than 1 positive integer;
N described signal processing channel is divided into the input signal of described testing circuit the signal of N section different frequency, described signal energy estimator carries out energy estimation to obtain signal energy value to every segment signal, and described signal energy value is converted to digital signal through described A/D converter and processes for next step.
Preferably, described testing circuit also comprises an automatic gain controller, and the signal input part of described automatic gain controller connects described transducer, and the signal output part of described automatic gain controller connects described band pass filter;
Described automatic gain controller is for carrying out gain-adjusted to the output signal of described transducer, to obtain stable signal amplitude.
Preferably, described signal processing channel connects a speech detector, and described speech detector judges the output signal of described signal processing channel, whether to identify the voice signal obtaining from voice, and sends interrupt signal to described controller.
Preferably, the value of described setting range is 50dB to 90dB,
Preferably, the value of described setting range is 50dB to 80dB.
Preferably, described microphone main body also comprises a timing unit, every testing circuit described in a setting-up time, the output signal of described transducer is processed.
Preferably, described setting-up time is 10ms.
Preferably, described signal energy estimator obtains estimation audio power according to RMS algorithm.
Beneficial effect: owing to adopting above technical scheme, the utility model can reduce meaningless power consumption, saves energy, and in the time meeting certain condition, microphone main body is activated from sleep pattern, enters normal mode of operation.
Brief description of the drawings
Fig. 1 is system architecture schematic diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as restriction of the present utility model.
With reference to Fig. 1, there is the microphone that voice activation detects, wherein, comprise a microphone main body, general microphone main body generally includes transducer 2, and the signal output part of transducer 2 connects the process chip such as amplifier 5, and acoustic pressure is converted to the signal of telecommunication by transducer 2, amplifier 5 is for the faint signal of telecommunication is amplified, to further process.
On the basis of existing technology, microphone main body of the present utility model comprises,
At least one transducer 1, transducer 1 connects a testing circuit 2; The signal output part of testing circuit 2 connects a controller 3;
Transducer 1 is for collected sound signal, and is converted to signal of telecommunication output; Testing circuit 2 is processed the output signal of transducer 1, and whether the voice signal that judgement gathers is voice, and exports a court verdict; Controller 3 receives court verdict, and determines whether microphone main body is waken up from sleep pattern.
As further improvement of the utility model, between transducer 1 and testing circuit 2, can also comprise a level detection unit 4, the signal output part of transducer 1 connects level detection unit 4;
Level detection unit 4 compares the level of transducer 1 output signal and a setting range, in the time that the level of transducer 1 output signal is positioned at setting range, sends an activation signal to testing circuit 2, activates testing circuit 2 and works.
The utility model utilizes level detection unit 4 to carry out intensity detection, judge whether the intensity of sound that transducer obtains is wanting the scope of speech recognition, as survey the scope of 50dB to 90dB decibel, or the scope of 50dB to 80dB, determine whether to need to activate whole testing circuit.
As further improvement of the utility model, testing circuit 2 comprises N signal processing channel in parallel, and each signal processing channel comprises a band pass filter, a signal energy estimator 22, an A/D converter 23; The band pass filter of each signal processing channel has different central angle frequencies; Wherein, N is greater than 1 positive integer;
N signal processing channel is divided into the input signal of testing circuit 2 signal of N section different frequency, signal energy estimator 22 carries out energy estimation to obtain signal energy value to every segment signal, and signal energy value is converted to digital signal through A/D converter 23 and processes for next step.
Signal energy estimator 22 obtains estimation audio power according to RMS algorithm.RMS is a kind of method of estimating audio power, is widely used in the design of filter of Audio Signal Processing, calculates simply, has good real-time, has direct incidence relation with acoustic pressure decibel value.
With reference to Fig. 1, N section band pass filter (BPF, Band-Pass Filter), comprise the first band pass filter 25, the second band pass filter, the 3rd band pass filter, the centre frequency of N section band pass filter can and have different central angle frequencies between 300Hz-3.5KHz, and this frequency range is the frequency range that human body is sounded.In people's ear, have more than 8000 band pass filter to realize phonological detection function, the utility model simulation people's ear is identified voice signal;
As further improvement of the utility model, testing circuit 2 also comprises an automatic gain controller 21(AGC, Automatic Gain Control), the signal input part of automatic gain controller 21 connects transducer 1, the signal output part connecting band bandpass filter of automatic gain controller 21;
Automatic gain controller 21 is for the output signal of transducer 1 is carried out to gain-adjusted, by significantly or the suitable amplitude range of Signal Regulation to by a small margin, to obtain stable signal amplitude.
As further improvement of the utility model, after signal processing channel, connect a speech detector 24, speech detector 24 judges the output signal of signal processing channel, whether the voice signal obtaining with identification is from voice, and send interrupt signal to controller 3, controller is waken up from sleep pattern.
Speech detector 24 can connect a memory cell, reference voice pattern (Pattern) and the corresponding intensity of sound of memory cell storage some, the voice signal of every band frequency is aggregated into after speech detector 24, speech detector 24 can be by comparing the reference voice pattern of input signal and memory cell storage, whether the voice signal obtaining with identification is from voice, and sending interrupt signal (INT) to controller 3, realization wakes up.The utility model utilizes the maximum difference of voice and most of other sound of nature to be: voice has multistage frequency spectrum, and other sound frequencies are single to realize identification.
As further improvement of the utility model, microphone main body also comprises a timing unit, every a setting-up time testing circuit 2, the output signal of transducer 1 is processed.Above-mentioned setting-up time can be 10ms.Detect once every 10ms; Then wait for, the utility model can reduce meaningless power consumption, saves energy, and in the time meeting certain condition, microphone main body is activated from sleep pattern, enters normal mode of operation.
The foregoing is only the utility model preferred embodiment; not thereby limit execution mode of the present utility model and protection range; to those skilled in the art; the scheme that being equal to of should recognizing that all utilization the utility model specifications and diagramatic content done replaces and apparent variation obtains, all should be included in protection range of the present utility model.
Claims (8)
1. have the microphone that voice activation detects, it is characterized in that, comprise a microphone main body, described microphone main body comprises,
At least one transducer, described transducer connects a testing circuit; The signal output part of described testing circuit connects a controller;
Described testing circuit comprises N signal processing channel in parallel, and each described signal processing channel comprises a band pass filter, a signal energy estimator, an A/D converter; The band pass filter of each described signal processing channel has different central angle frequencies; Wherein, described N is greater than 1 positive integer.
2. the microphone with voice activation detection according to claim 1, is characterized in that, between described transducer and described testing circuit, also comprise a level detection unit, the signal output part of described transducer connects described level detection unit;
Described level detection unit has a setting range, described level detection unit compares the level of described transducer output signal and described setting range, in the time that the level of described transducer output signal is positioned at described setting range, send an activation signal to described testing circuit, activate described testing circuit work.
3. the microphone with voice activation detection according to claim 1, it is characterized in that, described testing circuit also comprises an automatic gain controller, the signal input part of described automatic gain controller connects described transducer, and the signal output part of described automatic gain controller connects described band pass filter.
4. the microphone with voice activation detection according to claim 1, it is characterized in that, described signal processing channel connects a speech detector, described speech detector judges the output signal of described signal processing channel, whether to identify the voice signal obtaining from voice, and send interrupt signal to described controller.
5. the microphone with voice activation detection according to claim 2, is characterized in that, the value of described setting range is 50dB to 90dB.
6. the microphone with voice activation detection according to claim 2, is characterized in that, the value of described setting range is 50dB to 80dB.
7. the microphone with voice activation detection according to claim 1, is characterized in that, described microphone main body also comprises a timing unit, every testing circuit described in a setting-up time, the output signal of described transducer is processed.
8. the microphone with voice activation detection according to claim 7, is characterized in that, described setting-up time is 10ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420021954.6U CN203984647U (en) | 2014-01-14 | 2014-01-14 | There is the microphone that voice activation detects |
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| CN201420021954.6U CN203984647U (en) | 2014-01-14 | 2014-01-14 | There is the microphone that voice activation detects |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780483A (en) * | 2014-01-14 | 2015-07-15 | 钰太芯微电子科技（上海）有限公司 | Microphone with voice activity detection function |
| CN107231584A (en) * | 2016-03-25 | 2017-10-03 | 美特科技(苏州)有限公司 | A kind of microphone apparatus |
| CN107948865A (en) * | 2017-12-29 | 2018-04-20 | 华景传感科技（无锡）有限公司 | Low-power consumption microphone |
| CN108093350A (en) * | 2017-12-21 | 2018-05-29 | 广东小天才科技有限公司 | Microphone control method and microphone |
| CN109976819A (en) * | 2019-04-01 | 2019-07-05 | 百度在线网络技术（北京）有限公司 | Equipment awakening method, device and storage medium |
| CN109979452A (en) * | 2019-03-21 | 2019-07-05 | 中山安信通机器人制造有限公司 | On-vehicle machines people's natural language processing method, computer installation and computer readable storage medium |
| CN112995821A (en) * | 2021-03-01 | 2021-06-18 | 歌尔微电子股份有限公司 | Microphone control method, microphone system and wearable device |
| CN114167761A (en) * | 2021-10-27 | 2022-03-11 | 山东北溟科技有限公司 | Acoustic beacon activation method and system |
-
2014
- 2014-01-14 CN CN201420021954.6U patent/CN203984647U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780483A (en) * | 2014-01-14 | 2015-07-15 | 钰太芯微电子科技（上海）有限公司 | Microphone with voice activity detection function |
| CN107231584A (en) * | 2016-03-25 | 2017-10-03 | 美特科技(苏州)有限公司 | A kind of microphone apparatus |
| CN108093350A (en) * | 2017-12-21 | 2018-05-29 | 广东小天才科技有限公司 | Microphone control method and microphone |
| CN108093350B (en) * | 2017-12-21 | 2020-12-15 | 广东小天才科技有限公司 | Microphone control method and microphone |
| CN107948865A (en) * | 2017-12-29 | 2018-04-20 | 华景传感科技（无锡）有限公司 | Low-power consumption microphone |
| CN107948865B (en) * | 2017-12-29 | 2024-03-08 | 华景传感科技（无锡）有限公司 | Low-power consumption microphone |
| CN109979452A (en) * | 2019-03-21 | 2019-07-05 | 中山安信通机器人制造有限公司 | On-vehicle machines people's natural language processing method, computer installation and computer readable storage medium |
| CN109976819A (en) * | 2019-04-01 | 2019-07-05 | 百度在线网络技术（北京）有限公司 | Equipment awakening method, device and storage medium |
| CN112995821A (en) * | 2021-03-01 | 2021-06-18 | 歌尔微电子股份有限公司 | Microphone control method, microphone system and wearable device |
| CN114167761A (en) * | 2021-10-27 | 2022-03-11 | 山东北溟科技有限公司 | Acoustic beacon activation method and system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20141203 |