CN104469621B - A kind of voice remote controller anti-jamming circuit and method - Google Patents
A kind of voice remote controller anti-jamming circuit and method Download PDFInfo
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Abstract
The invention discloses a kind of voice remote controller anti-jamming circuit and methods, the voice remote controller anti-jamming circuit includes the first difference processing circuit and the secondary Mike that is set on controlled electronic equipment, the input terminal of first difference processing circuit wherein receive all the way the transmission of voice remote controller acquired by main Mike and composite voice signal after coding module coded treatment, in addition the noise signal acquired by the secondary Mike is received all the way, and the output end of the first difference processing circuit is connect by a bandwidth-limited circuit with voice signal decoding processing circuit.The voice remote controller anti-jamming circuit of the present invention, by the way that a secondary Mike is arranged at controlled electronic equipment end, for acquiring ambient noise signal, utilize the characteristic that ambient noise is constant within shorter a period of time, difference processing is carried out by the composite voice signal and the ambient noise signal of secondary Mike acquisition that acquire main Mike, and then pure audio controls can be obtained, improve the adaptive capacity to environment of voice remote controller.
Description
Technical field
The present invention relates to a kind of speech processing circuits, specifically, be related to a kind of voice remote controller anti-jamming circuit and
Method.
Background technology
Speech-sound intelligent remote controler is used to acquire the voice control command of user, and is sent to television set main control unit, by leading
It controls unit analysis voice control command and executes corresponding operation, applied in the larger place of workshop or other ambient noises
When, the voice intensity of user is weak compared with ambient noise, and much therefore, voice signal can be interfered greatly, so as to cause
The problem of television set receives the signal of mistake and makes maloperation, or receive comprising the voice control compared with strong background noise
Order, and main control unit correctly can not therefrom extract real control command, and the phenomenon that judge by accident, lead to maloperation
Occur.
Invention content
Existing voice remote controler is affected by environment larger in order to solve by the present invention, can not be answered in the larger place of ambient noise
With the technical issues of, it is proposed that a kind of voice remote controller anti-jamming circuit can filter out ambient noise, adaptive capacity to environment
By force.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following scheme：
A kind of voice remote controller anti-jamming circuit, including the first difference processing circuit and be set on controlled electronic equipment
Secondary Mike, the input terminal of the first difference processing circuit wherein receive being acquired by main Mike for the transmission of voice remote controller all the way
And composite voice signal after coding module coded treatment, in addition receive the noise letter acquired by the secondary Mike all the way
Number, the output end of the first difference processing circuit is connect by a bandwidth-limited circuit with voice signal decoding processing circuit.
Further, further include the second difference processing circuit and audio sample circuit, the input of the audio sample circuit
End is connect with the secondary Mike, the input terminal of the second difference processing circuit output end with the audio sample circuit all the way
In addition connection receives the audio signal for being controlled electronic equipment output, the output end of the second difference processing circuit and institute all the way
State the input terminal connection of the first difference processing circuit.
Further, it is connected with a band between the second difference processing circuit and the first difference processing circuit
Hinder filter circuit.
Further, the output end of the voice signal decoding processing circuit connects loud speaker by power amplifier.
Further, the first difference processing circuit is connect with wireless receiving module, for receiving voice remote controller
The wireless composite voice signal sent.
Further, the main Mike is set to the middle part of the voice remote controller, and the secondary Mike is set to described
The side of controlled electronic equipment.
Based on a kind of above-mentioned language remote controler anti-jamming circuit, it is anti-dry that the present invention proposes a kind of voice remote controller simultaneously
Processing method is disturbed, is included the following steps：
（1）, the first difference processing circuit receive voice remote controller transmission acquired by main Mike and by coding mould
Block coding treated composite voice signal and the noise signal acquired by secondary Mike, and will be sent out after two paths of signals difference processing
It send to bandwidth-limited circuit；
（2）, bandwidth-limited circuit filter out the signal except human audio's bandwidth range, and be sent to voice signal decoding
Processing circuit is decoded processing.
Further, the step（2）In, the bandwidth-limited circuit allow by bandwidth range be 7~20KHz.
Further, it is sent out comprising pure noise signal and controlled electronic equipment in the noise signal of the secondary Mike acquisition
Audio signal, the step（1）In, the noise signal of secondary Mike acquisition be sent to before the first difference processing circuit further include by
The step of audio signal that the controlled electronic equipment is sent out filters out：
A, the noise signal of secondary Mike acquisition is sent to audio sample circuit, the letter that the audio sample circuit will be received
Number audio sample is carried out, and is sent to the two or two difference processing circuit；
B, the second difference processing circuit receives the noise signal after sampling, and the noise signal and controlled electronics are set
The audio signal of standby output carries out difference processing, obtains pure noise signal, and send it to the first difference processing circuit.
Further, in the step b, further include the steps that the pure noise signal is subjected to bandreject filtering, filter out
Positioned at the signal of human audio's bandwidth range.
Compared with prior art, the advantages and positive effects of the present invention are：The voice remote controller anti-jamming circuit of the present invention,
By the way that a secondary Mike is arranged at controlled electronic equipment end, for acquiring ambient noise signal, using ambient noise shorter one
Constant characteristic in the section time, by by main Mike acquire include audio controls and ambient noise signal compound language
Sound signal and the ambient noise signal of secondary Mike acquisition carry out difference processing, and then can obtain pure audio controls,
Erroneous judgement of the main control unit to audio controls is avoided, the adaptive capacity to environment of voice remote controller is improved.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of embodiment functional-block diagram of voice remote controller anti-jamming circuit proposed by the invention；
Fig. 2 is voice remote controller anti-interference circuit system structural schematic diagram proposed by the invention；
Fig. 3 is another embodiment functional-block diagram of voice remote controller anti-jamming circuit proposed by the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one, the present embodiment propose a kind of voice remote controller anti-jamming circuit, as shown in Figure 1 and Figure 2, including the
One difference processing circuit and the secondary Mike 12 for being set on controlled electronic equipment 11, the input terminal of the first difference processing circuit
Wherein all the way receive voice remote controller 21 transmission acquired by main Mike 22 and answering after coding module coded treatment
Voice signal is closed, in addition receives the noise signal acquired by the secondary Mike, the output of the first difference processing circuit all the way
End is connect by a bandwidth-limited circuit with voice signal decoding processing circuit.The anti-interference electricity of voice remote controller of the present embodiment
Road, by the way that secondary Mike is arranged on controlled electronic equipment, for acquiring ambient noise signal, using ambient noise shorter one
Constant characteristic in the section time, by by main Mike acquire include audio controls and ambient noise signal compound language
Sound signal and the ambient noise signal of secondary Mike acquisition are input to the first difference processing circuit and carry out difference processing, and then can obtain
To pure audio controls, erroneous judgement of the main control unit to audio controls is avoided, improves the ring of voice remote controller
Border adaptability.
In the present embodiment, if controlled electronic equipment itself is with if audio playing function, due to secondary Mike from quilt
It controls that electronic equipment is closer, therefore comprising pure ambient noise signal and comes from controlled electronics in the noise signal of secondary Mike acquisition and set
Standby audio signal, and for the signal that main Mike is acquired, since main Mike distance is controlled electronic equipment relatively far away from,
Ambient noise signal is much larger than the audio signal that controlled electronic equipment is sent out, therefore, in the composite voice signal of main Mike's acquisition
Include mainly pure ambient noise signal and audio controls, in order to improve the first difference processing circuit output audio controls
Degree of purity, it should improve the first difference processing circuit input end first namely come from secondary Mike acquisition noise signal it is pure
Cleanliness, as shown in figure 3, further including the second difference processing circuit and audio sample circuit, the audio sample in the present embodiment
The input terminal of circuit is connect with the secondary Mike, and the input terminal of the second difference processing circuit is electric with the audio sample all the way
The output end on road connects, and in addition receives the audio signal for being controlled electronic equipment output all the way, the second difference processing circuit
Output end is connect with the input terminal of the first difference processing circuit.The noise that audio sample circuit is used to acquire secondary Mike is believed
It number is sampled, and is sent to the second difference processing circuit, in addition the second difference processing circuit receives controlled electricity all the way
The audio signal of sub- equipment output, because the audio signal is sent out by the main control unit control for being controlled electronic equipment, therefore, the
Two difference processing circuits directly take over the road signal from the corresponding module of main control unit, the second difference processing circuit
After the two paths of signals received is carried out difference processing, pure ambient noise signal is obtained, and export to the first difference channel, be used for
Difference Calculation comes from the audio controls of main Mike, is pure ambient noise signal due to doing difference processing, with master
Mike includes available more pure voice control letter after pure ambient noise signal and audio controls progress difference
Number.
As shown in Fig. 2, since main Mike 22 is used for the collection of voice signal, secondary Mike is used for the collection of noise, so two
The locations of structures of person is also critically important, them to be made to be in the position for being more easy to receive signal on controlled electronic equipment and voice remote controller
It sets, in the present embodiment, the main Mike 22 is set to the middle part of the voice remote controller 21, and the secondary Mike 12 is set to institute
The side of controlled electronic equipment 11, such as the upper left quarter of controlled electronic equipment 11 are stated, makes it easier to receive extraneous noise
And it is easily dust-proof.
As shown in figure 3, the main Mike that the operation principle of voice remote controller is disposed on voice remote controller acquires voice control
Signal is accordingly arranged by being emitted by wireless transmitter module after voice remote controller progress coded treatment at controlled electronic equipment end
There is wireless receiving module, for receiving the wireless composite voice signal for coming from voice remote controller transmission, and carry out decoding process,
Therefore, the first difference processing circuit and the wireless receiving module of front end connect, the nothing that wireless receiving module will be received
Line composite voice signal is sent to the first difference processing circuit and is further processed.Wherein, the wireless transmission in the present embodiment
Module and wireless receiving module can pass through rf wireless signal or bluetooth wireless signal transmission.
In the present embodiment, it is connected between the second difference processing circuit and the first difference processing circuit
One rejector circuit.Since the second difference processing circuit is mainly used for believing for the first difference processing circuit output ambient noise
Number, therefore, it is possible to comprising untreated complete voice signal, by the second difference processing circuit and first difference
A rejector circuit is connected between processing circuit, the signal for filtering out human speech frequency range will be about 7KHz~20KHz
The target signal filter of bandwidth, it is ensured that do not include be mingled with human speech signal in the second difference processing circuit output signal.
It is made for the ease of integrated, preferably the voice signal decoding processing circuit described in the present embodiment, the second difference
Processing circuit and audio sample circuit are integrated in the main control chip of controlled electronic equipment, and the output end of the main control chip is logical
Power amplifier connection loud speaker is crossed, the audio signal after decoding process is exported.
Wherein, controlled electronic equipment signified in the present embodiment, which can be television set, speaker, air-conditioning etc., has voice remote control
The electrical equipment of function.The voice remote controller anti-jamming circuit of the present embodiment is particularly suitable for making an uproar in workshop or other backgrounds
In the larger place of sound, can accurately extract audio controls from stronger noise, avoid main control unit because
The problem of identifying erroneous judgement of the difficulty to audio controls, improves the adaptive capacity to environment of voice remote controller.
Embodiment two, based on a kind of voice remote controller anti-jamming circuit in embodiment one, the present embodiment proposes one kind
Voice remote controller anti-interference processing method, includes the following steps：
S1, the first difference processing circuit receive voice remote controller transmission acquired by main Mike and pass through coded treatment
Composite voice signal after resume module and the noise signal acquired by secondary Mike, and will be sent after two paths of signals difference processing
To bandwidth-limited circuit；
S2, bandwidth-limited circuit filter out the signal except human audio's bandwidth range, and are sent to voice signal decoding
Processing circuit is decoded processing.
The voice remote controller anti-interference method of the present embodiment, by the way that secondary Mike is arranged on controlled electronic equipment, for adopting
Collection ambient noise signal passes through the packet for acquiring main Mike using the characteristic that ambient noise is constant within shorter a period of time
Containing audio controls and ambient noise signal and after coding module coded treatment composite voice signal and secondary wheat
The ambient noise signal of gram acquisition is input to the first difference processing circuit and carries out difference processing, and then can obtain pure voice
Signal is controlled, erroneous judgement of the main control unit to audio controls is avoided, improves the adaptive capacity to environment of voice remote controller.It is logical
Bandpass filtering step is crossed, for further filtering out the noise signal that the non-difference processing of preceding step is fallen, is further improved
The degree of purity of audio controls.
Wherein, in the step S2, the bandwidth-limited circuit allow by bandwidth range be 7~20KHz, that is,
Allow the signal of human speech bandwidth range to pass through, is considered noise signal beyond the range, and filtered out.
If controlled electronic equipment itself with if audio playing function, due to secondary Mike from must be controlled electronic equipment compared with
Closely, therefore in the noise signal of secondary Mike acquisition include pure ambient noise signal and the audio letter for coming from controlled electronic equipment
Number, and for the signal that main Mike is acquired, since main Mike distance is controlled electronic equipment relatively far away from, ambient noise letter
Therefore number audio signal sent out much larger than controlled electronic equipment includes mainly pure in the composite voice signal of main Mike's acquisition
Ambient noise signal and audio controls, in order to improve the degree of purity of the first difference processing circuit output audio controls,
In the step S1, it further includes before by the controlled electricity that the noise signal of secondary Mike acquisition, which is sent to the first difference processing circuit,
The step of audio signal that sub- equipment is sent out filters out：
A, the noise signal of secondary Mike acquisition is sent to audio sample circuit, the letter that the audio sample circuit will be received
Number audio sample is carried out, and is sent to the two or two difference processing circuit；
B, the second difference processing circuit receives the noise signal after sampling, and the noise signal and controlled electronics are set
The audio signal of standby output carries out difference processing, obtains pure noise signal, and send it to the first difference processing circuit.
Since the second difference processing circuit is mainly used for as the first difference processing circuit output ambient noise signal,
It is possible to include untreated complete voice signal in the signal of second difference processing circuit output, in the step b, further includes
The step of pure noise signal is carried out bandreject filtering, filters out the signal positioned at human audio's bandwidth range.It specifically can be with
By being connected with a rejector circuit between the second difference processing circuit and the first difference processing circuit, for filtering
Except the signal of human speech frequency range, the target signal filter of 7~20KHz bandwidth will be about, it is ensured that the second difference processing circuit output
Be mingled with human speech signal is not included in signal.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the those of ordinary skill in domain is made in the essential scope of the present invention, should also belong to this hair
Bright protection domain.
Claims (8)
1. a kind of voice remote controller anti-jamming circuit, which is characterized in that including the first difference processing circuit and be set to controlled electricity
Secondary Mike in sub- equipment, the input terminal of the first difference processing circuit wherein receive the wireless transmission of voice remote controller all the way
Acquired by main Mike and composite voice signal after coding module coded treatment, in addition receive all the way by the secondary wheat
The noise signal of gram acquisition, the output end of the first difference processing circuit pass through a bandwidth-limited circuit and are decoded with voice signal
Processing circuit connects, and the main Mike is set to the middle part of the voice remote controller, and the secondary Mike is set to described controlled
The side of electronic equipment further includes the second difference processing circuit and audio sample circuit, the input terminal of the audio sample circuit
It is connect with the secondary Mike, the input terminal of the second difference processing circuit connects with the output end of the audio sample circuit all the way
Connect, in addition all the way receive be controlled electronic equipment output audio signal, the output end of the second difference processing circuit with it is described
The input terminal of first difference processing circuit connects.
2. according to the voice remote controller anti-jamming circuit described in claim 1, which is characterized in that second difference processing
It is connected with a rejector circuit between circuit and the first difference processing circuit.
3. according to the voice remote controller anti-jamming circuit described in claim 1, which is characterized in that the voice signal decoding
The output end of processing circuit connects loud speaker by power amplifier.
4. according to claim 1-3 any one of them voice remote controller anti-jamming circuits, which is characterized in that described first
Difference processing circuit is connect with wireless receiving module, the wireless composite voice signal for receiving voice remote controller transmission.
5. a kind of voice remote controller anti-interference processing method, which is characterized in that including claim 1-4 any one of them voices
Remote controler anti-jamming circuit, the voice remote controller anti-interference processing method include the following steps：
（1）, the first difference processing circuit receive voice remote controller transmission acquired by main Mike and by coding module compile
The composite voice signal of code processing and the noise signal acquired by secondary Mike, and band will be sent to after two paths of signals difference processing
Bandpass filter circuit；
（2）, bandwidth-limited circuit filters out the signal except human audio's bandwidth range, and is sent to voice signal decoding process
Circuit is decoded processing；
The main Mike is set to the middle part of the voice remote controller, and the secondary Mike is set to the controlled electronic equipment
Side.
6. voice remote controller anti-interference processing method according to claim 5, which is characterized in that the step（2）In, institute
State bandwidth-limited circuit allow by bandwidth range be 7 KHz~20KHz.
7. voice remote controller anti-interference processing method according to claim 6, which is characterized in that the secondary Mike acquisition
The audio signal sent out comprising pure noise signal and controlled electronic equipment in noise signal, the step（1）In, secondary Mike acquisition
Noise signal to be sent to before the first difference processing circuit further include the audio signal filter for sending out the controlled electronic equipment
Except the step of：
A, the noise signal of secondary Mike acquisition is sent to audio sample circuit, the audio sample circuit by received signal into
Row audio sample, and it is sent to the second difference processing circuit；
B, the second difference processing circuit receives the noise signal after sampling, and the noise signal and controlled electronic equipment is defeated
The audio signal gone out carries out difference processing, obtains pure noise signal, and send it to the first difference processing circuit.
8. voice remote controller anti-interference processing method according to claim 7, which is characterized in that in the step b, also
Include the steps that the pure noise signal is subjected to bandreject filtering, filters out the signal positioned at human audio's bandwidth range.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107845388B (en) * | 2017-12-25 | 2021-06-01 | 青岛海信移动通信技术股份有限公司 | Voice recognition method and device |
| CN110322882A (en) * | 2019-05-13 | 2019-10-11 | 厦门亿联网络技术股份有限公司 | A kind of method and system generating mixing voice data |
| CN116129895A (en) * | 2023-01-04 | 2023-05-16 | 中国第一汽车股份有限公司 | Safety belt, method and vehicle based on voice recognition function |
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| CN203537555U (en) * | 2013-09-27 | 2014-04-09 | Tcl通力电子（惠州）有限公司 | Audio device |
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| JP2013015329A (en) * | 2011-06-30 | 2013-01-24 | Japan Display Central Co Ltd | Sensor module and display device |
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| EP0545731A1 (en) * | 1991-12-06 | 1993-06-09 | Sony Corporation | Noise reducing microphone apparatus |
| CN101727907A (en) * | 2008-10-29 | 2010-06-09 | 雅马哈株式会社 | Audio-frequency processing circuit, audio-frequency processing device and method |
| CN101444451A (en) * | 2008-12-31 | 2009-06-03 | 安徽同舟电子科技有限公司 | Sound control massager and sound control method thereof |
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