CN102881287B - Voice triggering method and circuit - Google Patents
Voice triggering method and circuit Download PDFInfo
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- CN102881287B CN102881287B CN201210352100.1A CN201210352100A CN102881287B CN 102881287 B CN102881287 B CN 102881287B CN 201210352100 A CN201210352100 A CN 201210352100A CN 102881287 B CN102881287 B CN 102881287B
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Abstract
The invention relates to a voice automatic triggering method. In the voice automatic triggering method, a voice detection circuit and a first comparison and judgment circuit are adopted; the voice detection circuit comprises an audio amplification circuit and a voice detector circuit; the current input of a microphone passes through the audio amplification circuit; the output of the voice detection circuit is connected with the first comparison and judgment circuit formed by a comparator circuit; the first comparison and judgment circuit is connected with a communication keeping circuit; the communication keeping circuit consists of a switch control circuit, a quick charging circuit and a remote control (RC) slow discharging circuit and is used for realizing quick triggering and transient keeping of communication; a second comparison and judgment circuit realizes voice automatic triggering of voice control PTT enabling; and the voice detector circuit is a logarithmic detector circuit and is used for identifying and detecting signals according to people's voice.
Description
One, technical field
This invention belongs to wireless communication.
Two, background technology
Voice automatically control send out technology be a kind of by voice automatically trigger wireless interspeaker, radio station PTT control send out technology, eliminating common intercom needs hand to press the troublesome operation of PTT key, really achieves liberation both hands.Meanwhile, realize real people's acoustic control and send out, effectively prevent the false triggering situation because environmental noise causes, the situation such as use for intercom in half-duplex apparatus in private environment and the communication of full duplex equipment, nervous environment is all very effective and practical.
Existing voice is automatically controlled and is sent out i.e. VOX function, more difficult difference voice and non-human voice signal, non-human voice signal all can not trigger intercom and launch, need the false triggering situation avoided because neighbourhood noise causes, even if the voice signal model utilizing people to speak, resolve from the voice signal of microphone input and identify voice signal, being also difficult to guarantee and only having when human voice signal being detected just by the transmitting of PTT triggering intercom.
Three, summary of the invention
The present invention seeks to, propose a kind of voice and automatically control forwarding method and circuit, automatically trigger wireless interspeaker, radio station PTT controls the technology sent out, eliminating common intercom needs hand to press the troublesome operation of PTT key, really achieves liberation both hands.Effectively can distinguish the voice of neighbourhood noise and people, effectively shield the ground unrests such as vehicle movement, vibration, noisy environment, intercom can not be triggered when nobody speaks and launch, accomplish real " people's acoustic control is sent out ".And complete to the voice of half-duplex communication device automatically control send out and telecommunication circuit keep.
Technical scheme of the present invention is: voice control forwarding method automatically, adopt the testing circuit of voice, first compares decision circuit, the testing circuit of voice comprises the electric current input of microphone through audio amplifier circuit and speech detecting circuit, the testing circuit output of voice connects first of comparator circuit formation and compares decision circuit, relatively connect letter holding circuit after decision circuit, by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit realize the communication holding circuit of rapid triggering and the of short duration maintenance that communicates communicated, again by second compare decision circuit realize the enable voice of Voice command PTT automatically control send out.
Described voice detecting circuit is logarithmic detector circuit, carries out Signal analysis and detection for voice.
The logarithmic detector circuit of described speech detection adopts single-ended signal input, another input pin AC coupling over the ground.
The detecting circuit of described logarithmic amplifier, adopt cascade amplifier, and all adopt full-wave rectifying circuit in the output of every grade of amplifier, the output of the full-wave rectifying circuit of the output at different levels DC voltage of output smoothing after low-pass filter filtering again after totalizer is added.Signal conductively-closed on the threshold value that cascade amplifier exports.
Communication holding circuit by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit etc. form, when the first input audio detection level comparing the input end of decision circuit reaches the reference level of setting, first compares decision circuit output switch circuit opens and carries out rapid charge to RC circuit; Charge closing switch after the testing circuit sound signal of voice terminates, now RC circuit continuous discharge at a slow speed, voltage also can reduce gradually, and reference level and the velocity of discharge are sent out in the triggering control according to presetting, 3 ± 0.5 seconds discharge times that design needs; In communication holding circuit, the communication activation opening time is about 50ms, communication holding circuit about 3 ± 0.5 seconds; Complete to the voice of half-duplex communication device automatically control send out and telecommunication circuit keep.
Second to compare decision circuit be negative sense input triggering level comparator circuit, and the reference level value that preset control is sent out is 0.8V; When not having voice signal to enter this circuit, control generating is put down as high level; After voice signal enters this circuit, the quick communication holding circuit of giving of meeting be charged, thus activates PTT button, control generating is put down and drags down rapidly; The response time of whole circuit 25 ~ 70 milliseconds.
Voice control Power Generation Road automatically, the testing circuit, first of voice is adopted to compare decision circuit, the testing circuit of voice comprises the electric current input of microphone through audio amplifier circuit and speech detecting circuit, the testing circuit output of voice connects first of comparer formation and compares decision circuit, by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit form and realize the communication holding circuit of rapid triggering and the of short duration maintenance that communicates communicated, and second compare decision circuit realize the enable voice of Voice command PTT automatically control send out.
Communication holding circuit by switch control rule, rapid charge and RC at a slow speed discharge circuit etc. form, when the first input audio detection level comparing the input end of decision circuit reaches the reference level of setting (being such as set to 2.0V), first compares decision circuit output switch circuit opens and carries out rapid charge to RC circuit; Charge closing switch after the testing circuit sound signal of voice terminates, now RC circuit continuous discharge at a slow speed, voltage also can reduce gradually, and sending out reference level 0.8V(the present invention according to the triggering control preset, to arrange threshold value be 0.8V) and the velocity of discharge, 3 ± 0.5 seconds discharge times that design needs.In communication holding circuit, the communication activation opening time is about 50mS, communication holding circuit about 3 seconds; Complete to the voice of half-duplex communication device automatically control send out and telecommunication circuit keep.
Arrange the voice that the thresholding swashing words PTT is 220mV ± 10% peak-to-peak value, the design voice retention time is 2.76 seconds ± 10%.Test adopts peak-to-peak value to be that the voice signal of 228.75mV is as audio frequency activation signal source, after voice signal is closed, discharge circuit in communication holding circuit discharges at a slow speed, when tension discharge reaches certain value, activate second and compare decision circuit, thus reach the object that electric discharge is put slowly, the retention time that communicates is controlled.
Second compares decision circuit, and be negative sense input triggering level comparator circuit at this circuit, preset reference level value is 0.8V, when there not being triggering level, or triggering level lower than 0.8V time, this comparer exports control generating and puts down as high level; When high triggering level is greater than 0.8V, reverse incoming level onset, the control generating of output is flat instantaneously becomes low level, thus realizes sending out the control of other half-duplex apparatuses PTT.
When not having voice signal to enter this circuit, control generating is put down as high level; After voice signal enters this circuit, the quick communication holding circuit of giving of meeting be charged, thus activates PTT button, control generating is put down and drags down rapidly.The response time 25-70 millisecond of whole circuit.
Beneficial effect of the present invention: control is sent out accurately errorless.Speech recognition device adopts voice keep and compare decision circuit, makes digital identification circuit can voice signal under various environmental noise in automatic identification signal by suitable Selecting parameter, can also get rid of simultaneously sound of walking, etc. the impact of undesired signal.Bone-conduction microphone earphone can be used, more effectively shield neighbourhood noise.The present invention can effectively prevent voice bursts, interfering noise for the impact of whole circuit and interference, there is the advantages such as flexible, low in energy consumption, the simple and practical and products application of dynamic range adjustment is strong, be specially adapted to the situations such as the use of intercom in the communication of half-duplex apparatus and full duplex equipment in private environment, nervous environment, the field such as product prepared by the present invention is applicable to police's anti-terrorism, public security, criminal investigation, fire-fighting, traffic police, work high above the ground, mining, dangerous operation, emergency relief, disaster are sued and laboured.
Four, accompanying drawing explanation
Design frame chart is sent out in Fig. 1 people's acoustic control;
Fig. 2 communicates holding circuit;
Slow discharge response closed in Fig. 3 voice;
Fig. 4 voice activation PTT response time;
Fig. 5 voice keep response.
Five, embodiment
The present invention is based on logarithmic detector circuit, communication holding circuit and compare the technology such as decision circuit, come automatically to control the voice of half-duplex communication device to send out and telecommunication circuit keeps.This logarithmic detector circuit carries out Signal analysis and detection for voice, thus the automatic control realizing voice is sent out.In communication holding circuit, the communication activation opening time is about 50mS, communication holding circuit about 3 seconds, the interruption of the communication caused of can effectively avoiding pausing owing to speaking and voice lose word phenomenon.Relatively in decision circuit, the signal level value detected and reference level are compared, rear control is adjudicated to the human voice signal reaching reference level value and sends out PTT.Physical circuit is as follows:
Audio frequency detecting circuit: this detecting circuit is based on logarithmic detector technology, adopt AD company AD8307, this chip is a complete monolithic 500MHz demodulating logarithmic amplifier based on continuous compress technique technology, the dynamic range of 92dB is provided, output voltage slope is the single-voltage-supply cmos that 25Mv/dB (cut off is-84dBm) .AD8307 adopts 2.7-5.5V, 7.5mA, and power consumption is lower.Be widely used in the fields such as communication, radar, ultrasonic and electronic countermeasure.
This logarithmic detector circuit adopts single-ended signal input, another input pin AC coupling over the ground.Supply voltage 5V, manageable input signal is maximum reaches+16dBm.Adopt the detecting way of logarithmic amplifier, adopt cascade amplifier, and all adopt full-wave rectifying circuit in the output of every grade of amplifier, the output of the full-wave rectifying circuit of output at different levels exports comparatively level and smooth DC voltage again after totalizer is added after low-pass filter filtering.
Communication holding circuit: this circuit controls primarily of the output circuit after the first comparator circuit and on-off circuit, rapid charge and the RC composition such as discharge circuit at a slow speed, mainly realizes the rapid triggering of communication and the functions such as of short duration maintenance that communicate.When input audio detection level reaches the reference level of our setting (we are set to 2.0V), on-off circuit is opened and is carried out rapid charge to RC circuit; Charge closing switch after sound signal terminates, now RC circuit continuous discharge at a slow speed, voltage also can reduce gradually, and the triggering control according to presetting sends out reference level 0.8V and the velocity of discharge, 3 seconds discharge times of needs.
This circuit has that charging is exceedingly fast, discharge time is controlled, the advantages such as circuit is simple and reliable.
Shown in Fig. 2, typical RC discharge and recharge electricity time T:
T=RC*Ln[(V1-V0)/(V1-Vt)]
（1）
Wherein, V0 is the initial voltage value on electric capacity;
V1 is the magnitude of voltage that electric capacity finally can be charged to or be put into;
Vt is the magnitude of voltage on T moment electric capacity;
RC is discharge and recharge resistance and electric capacity;
E is constant (getting 2.72).
This charging circuit adopts the mode of high-current switch pipe series capacitance, is different from traditional RC charging circuit.When charging, V0=U=0V, V1=E=12V, presetting triggering level value V=0.8V, corresponding Vt is 1.2V, due to the direct series capacitance C of this contactor, so resistance R ≈ 0 Ω, thus in theory the Ton opening time close to 0S, but in side circuit, there are some switching times in switch chip, so the whole PTT time of starting to control of actual test is about 40mS.
At the end of sound signal, charge switch is closed, and electric capacity C starts electric discharge, and now, V0=E=12V, Vt=1.2V, V1=0V, get RC=1.2, substitutes into formula (1), T discharge time obtained:
T≈2.3RC=2.76S
Reality tests about 2.91S, has a point tolerance.
Slow discharge response figure is closed see Fig. 3 voice, we arrange the voice that the thresholding swashing words PTT is 220mV ± 10% peak-to-peak value, the design voice retention time is 2.76 seconds ± 10%. in figure 3, we test and adopt peak-to-peak value to be that the voice signal of 228.75mV is as audio frequency activation signal source, after voice signal is closed, discharge circuit in communication holding circuit discharges at a slow speed, when tension discharge reaches certain value (it is 0.8V that this circuit arranges threshold value), decision circuit is compared in activation, thus reaches the object that electric discharge is put slowly, the retention time that communicates is controlled.
Second compares decision circuit: be negative sense input triggering level comparator circuit at this circuit, and preset reference level value is 0.8V, when there not being triggering level, or triggering level lower than 0.8V time, this comparer exports control generating and puts down as high level; When high triggering level is greater than 0.8V, reverse incoming level onset, the control generating of output is flat instantaneously becomes low level, thus realizes sending out the control of other half-duplex apparatuses PTT.
Scheme see Fig. 4 voice activation PTT response time.
In the diagram, when not having voice signal to enter this circuit, control generating is put down as high level; After voice signal enters this circuit, the quick communication holding circuit of giving of meeting be charged, thus activates PTT button, control generating is put down and drags down rapidly.The response time of whole circuit about 46.3 milliseconds.
Response schematic diagram is kept see Fig. 5 voice.
Fig. 5 is the characteristic of voice holding circuit response.When the state that voice signal exists, control generating is put down as low level, PTT is in hair-like state, after voice signal disappears, holding circuit continues to keep P to control generating and puts down as low level state, and the retention time is after 2.9 seconds, the voltage of holding circuit is lower than triggering thresholding 0.8V, make to compare decision circuit enable, thus control generating horizontal drawing is high, PTT stops sending.By actual measurement, demonstrate the consistance of the method and practice, successfully can realize Rapid Speech and activate control, call duration time maintenance etc.
Claims (3)
1. voice control forwarding method automatically, it is characterized in that adopting speech detection circuit, first compares decision circuit, speech detection circuit comprises audio amplifier circuit and the speech detecting circuit of the electric current input process of microphone, the output of speech detection circuit connects first of comparator circuit formation and compares decision circuit, first compares after decision circuit and connects letter holding circuit, by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit realize communicating holding circuit the function rapid triggering namely communicated and the of short duration maintenance that communicates, again by second compare decision circuit realize the enable voice of Voice command PTT automatically control send out, described speech detecting circuit is logarithmic detector circuit, carries out Signal analysis and detection for voice, the logarithmic detector circuit of speech detection adopts single-ended signal input, another input pin AC coupling over the ground, described logarithmic detector circuit is the detecting circuit adopting logarithmic amplifier, and employing cascade amplifier, and all adopt full-wave rectifying circuit in the output of every grade of amplifier, the output of the full-wave rectifying circuit of the output at different levels DC voltage of output smoothing after low-pass filter filtering again after totalizer is added, signal conductively-closed on the threshold value that cascade amplifier exports,
Described communication holding circuit by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit form, when the first input audio detection level comparing the input end of decision circuit reaches the reference level of setting, first compares decision circuit output switch circuit opens, to RC at a slow speed discharge circuit carry out rapid charge; Charge closing switch after the sound signal of speech detection electric circuit inspection terminates, now RC discharge circuit continuous discharge at a slow speed at a slow speed, voltage also can reduce gradually, and reference level and the velocity of discharge are sent out in the triggering control according to presetting, 3 ± 0.5 seconds discharge times that design needs; In communication holding circuit, the communication activation opening time is about 50ms, communication holding circuit 3 ± 0.5 seconds; Complete to the voice of half-duplex communication device automatically control send out and telecommunication circuit keep.
2. voice according to claim 1 control forwarding method automatically, and it is characterized in that second, to compare decision circuit be negative sense input triggering level comparator circuit, and the reference level value that preset control is sent out is 0.8V; When not having voice signal to enter this circuit, control generating is put down as high level; After voice signal enters this circuit, the quick communication holding circuit of giving of meeting be charged, thus activates PTT button, control generating is put down and drags down rapidly; The response time of whole circuit 25 ~ 70 milliseconds.
3. an enforcement of rights requires that the voice that forwarding method controlled automatically in the voice described in 2 control Power Generation Road automatically, it is characterized in that adopting speech detection circuit, first compares decision circuit, speech detection circuit comprises audio amplifier circuit and the speech detecting circuit of the electric current input process of microphone, the output of speech detection circuit connects first of comparer formation and compares decision circuit, first compares after decision circuit and connects letter holding circuit, by ON-OFF control circuit, rapid charge and RC at a slow speed discharge circuit realize communicating holding circuit the function rapid triggering namely communicated and the of short duration maintenance that communicates, and by second compare decision circuit realize the enable voice of Voice command PTT automatically control send out, when the first input audio detection level comparing the input end of decision circuit reaches the reference level of setting, first compares decision circuit output switch circuit opens, to RC at a slow speed discharge circuit carry out rapid charge, charge closing switch after the sound signal of speech detection electric circuit inspection terminates, now RC discharge circuit continuous discharge at a slow speed at a slow speed, voltage also can reduce gradually, and reference level and the velocity of discharge are sent out in the triggering control according to presetting, 3 ± 0.5 seconds discharge times that design needs, in communication holding circuit, the communication activation opening time is about 50mS, communication holding circuit about 3 seconds, complete to the voice of half-duplex communication device automatically control send out and telecommunication circuit keep.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103809108A (en) * | 2014-02-16 | 2014-05-21 | 成都市中州半导体科技有限公司 | Voice-controlled integrated circuit testing system and method |
| CN105096936A (en) * | 2014-05-15 | 2015-11-25 | 哈尔滨海能达科技有限公司 | Push-to-talk service control method and apparatus |
| CN107972699A (en) * | 2017-11-15 | 2018-05-01 | 中铁二十二局集团电气化工程有限公司 | Carry out car early warning system in a kind of existing line construction |
| CN107730832A (en) * | 2017-11-15 | 2018-02-23 | 中铁二十二局集团电气化工程有限公司 | Carry out car method for early warning in a kind of existing line construction |
| CN109165927A (en) * | 2018-09-01 | 2019-01-08 | 深圳市海腾建设工程有限公司 | A kind of minutes system |
| CN111447573A (en) * | 2020-04-02 | 2020-07-24 | 石家庄市善理通益科技有限公司 | Pure voice interaction device for public network talkback |
| JP2022120645A (en) * | 2021-02-05 | 2022-08-18 | アイコム株式会社 | Communication system, voice input device, communication terminal, and program |
| CN113131965B (en) * | 2021-04-16 | 2023-11-07 | 成都天奥信息科技有限公司 | Civil aviation very high frequency ground-air communication radio station remote control device and voice discrimination method |
| CN114269008A (en) * | 2021-12-15 | 2022-04-01 | 深圳优美创新科技有限公司 | Intelligent wearable device and communication method thereof, mobile terminal and storage medium |
| CN117412198A (en) * | 2023-10-19 | 2024-01-16 | 广州德亨信息技术有限公司 | PTT dynamic characteristic signal change detection circuit, device, equipment and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2449436Y (en) * | 2000-09-28 | 2001-09-19 | 葛清华 | Sound controlled microphone for intercom |
| CN101330682A (en) * | 2008-07-18 | 2008-12-24 | 航宇救生装备有限公司 | Walkie-talkie ear microphone with autoexcitation function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04179688A (en) * | 1990-11-13 | 1992-06-26 | Hitachi Building Syst Eng & Service Co Ltd | Emergency talk device for elevator |
| JP2006050260A (en) * | 2004-08-04 | 2006-02-16 | Toshiba Lighting & Technology Corp | Handsfree interphone device |
-
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- 2012-09-20 CN CN201210352100.1A patent/CN102881287B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2449436Y (en) * | 2000-09-28 | 2001-09-19 | 葛清华 | Sound controlled microphone for intercom |
| CN101330682A (en) * | 2008-07-18 | 2008-12-24 | 航宇救生装备有限公司 | Walkie-talkie ear microphone with autoexcitation function |
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