CN213547829U - Circuit structure and terminal of microphone - Google Patents
Circuit structure and terminal of microphone Download PDFInfo
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- CN213547829U CN213547829U CN202022331452.1U CN202022331452U CN213547829U CN 213547829 U CN213547829 U CN 213547829U CN 202022331452 U CN202022331452 U CN 202022331452U CN 213547829 U CN213547829 U CN 213547829U
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Abstract
The utility model provides a circuit structure of microphone and terminal thereof, this circuit structure mainly by N microphone, with digital encoder that the microphone communication is connected, with the main control unit that the digital encoder communication is connected with digital converter digital-analog converter that the main control unit communication is connected, with audio amplifier that the digital-analog converter communication is connected, with components such as J speaker that the audio amplifier communication is connected. Wherein N and J are both natural numbers greater than 1. And at least one of the speakers is electrically connected to the digital encoder. Compared with the prior art, the circuit structure and the terminal thereof have simple structure and can be convenient for noise reduction processing of collected user voice.
Description
Technical Field
The utility model relates to the field of machinary, especially, relate to circuit structure and terminal of microphone.
Background
Voice interaction is a representation mode of the current AI, and a common single microphone scheme (iPhone Siri) or double microphone scheme (Google Home) is excellent in performance in a near-field environment and brings cost advantages; but in far-field interaction environment, the user is at different angles in consideration of distance, and a multi-path microphone is a good choice.
The multi-path microphones are generally distributed in a geometric structure and form certain spatial directivity; two sets of algorithms are also matched, one set of algorithms is embedded for real-time processing of hardware acquisition information, and the other set of algorithms is responsible for processing cloud matching voice.
However, the conventional multi-path microphone generally adopts a dual-microphone structure, such as the microphones located at the upper and lower sides of the mobile phone terminal shown in fig. 1, to receive the sound of the user facing 180 degrees, however, in use, there are disadvantages that 1, such as sound source localization is limited to the 180 degree range of the microphone facing; 2. the noise of the user cannot be effectively removed, for example, the voice information collected by the microphone is mixed with the music or voice played by the user.
Therefore, how to provide a circuit structure of a microphone with a simple structure is convenient for performing noise reduction processing on collected user voice.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that solve is how under the condition of simplifying the structure, is convenient for fall the processing of making an uproar to the user pronunciation of collection.
In order to realize the technical problem, the utility model provides a circuit structure of microphone, include:
n microphones, wherein N is a natural number greater than 1;
the digital encoder is in communication connection with the digital encoder;
the main control device is in communication connection with the digital encoder;
the digital-to-analog converter is in communication connection with the main control device;
the audio amplifier is in communication connection with the digital-to-analog converter;
j loudspeakers are in communication connection with the audio amplifier, wherein J is larger than 1, and at least one loudspeaker is electrically connected with the digital encoder.
Further preferably, the digital encoder has M analog signal input interfaces connected to the microphone, and at least K analog signal input interfaces connected to the speaker; wherein M and K are both natural numbers greater than 1, and M is greater than K.
Further preferably, K is equal to 1.
Further preferably, said M is equal to 3; said N is equal to 3; said J is equal to 2.
Further preferably, the digital encoder further has a first digital signal communication interface electrically connected to the first pin of the main control device.
Further preferably, the digital encoder is also provided with a second digital signal communication interface which is electrically connected with a second pin of the main control device.
Further preferably, the digital-to-analog converter has a first digital signal communication interface electrically connected to the third pin of the main control device; the digital-to-analog converter is also provided with a first digital signal output interface which is electrically connected with a fourth pin of the main control device; the digital-to-analog converter is also provided with a second digital signal output interface which is electrically connected with the signal input interface of the audio amplifier.
Further preferably, the number of the audio amplifiers is the same as the number of the speakers, and the audio amplifiers correspond to the speakers one by one.
Further preferably, the system further comprises a server in communication connection with the master control device; the master control device comprises: the processor is electrically connected with the digital encoder and the digital-to-analog converter, and the transmission module is electrically connected with the processor and is used for being in communication connection with the server.
The application also provides a terminal comprising the circuit structure of the microphone.
Compared with the prior art, the circuit structure of the microphone provided by the application is simple in structure, and is convenient for noise reduction processing of collected user voice.
Drawings
Fig. 1 is a schematic structural diagram of a microphone in the prior art;
fig. 2 is a schematic structural diagram of a circuit structure according to an embodiment of the present invention;
fig. 3 is a system block diagram of a circuit structure according to an embodiment of the present invention;
the reference numbers indicate a microphone 1, a digital encoder 2, a digital-to-analog converter 4, a main control device 5, an audio amplifier 6, an audio amplifier 7, a server 8 and a loudspeaker 9.
Detailed Description
The circuit arrangement of the invention will now be described in more detail with reference to the schematic drawings, in which preferred embodiments of the invention are shown, it being understood that a person skilled in the art may modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
Example 1
Referring to fig. 2 and fig. 3, in the present embodiment, a circuit structure of a microphone is provided, which can be applied to an intelligent voice device, such as an AI speaker, and mainly includes N microphones 1, a digital encoder 2 having M analog signal input interfaces, a main control device 5 in communication connection with the digital encoder 2, a digital-to-analog converter 4 in communication connection with the main control device 5, an audio amplifier 6 in communication connection with the digital-to-analog converter 4, and J speakers 9 in communication connection with the audio amplifier 6. Wherein N and J are both natural numbers greater than 1. And at least one speaker is electrically connected to the digital encoder.
It can be known from the above that, because the circuit structure of the microphone can collect the user's voice and the environmental noise in real time through the microphone 1, when the digital encoder 2 converts the voice collected in real time by the microphone 1 into the corresponding target digital audio signal and inputs the signal to the main control device 5, the response feedback information inputted to the digital encoder 2 through the speaker 9 can be obtained, for example, through the communication connection between the digital encoder 2 and the speaker 9, the background sound source information corresponding to the sound source generated by the device itself is obtained and converted into the corresponding reference digital audio signal, and the corresponding reference digital audio signal is inputted to the main control device 5, so that the main control device 5 can perform the drying process on the target digital audio signal according to the reference digital audio signal to remove the portion representing the environmental noise, thereby better distinguishing the background noise in the collected user's voice under the condition of simplifying the structure, so as to perform noise reduction processing on the collected user voice.
Specifically, in order to meet the actual design and connection requirements, the digital encoder is provided with M analog signal input interfaces connected with a microphone, and at least K analog signal input interfaces connected with a loudspeaker; wherein, M and K are both natural numbers larger than 1, and M is larger than K.
In detail, preferably, K is equal to 1, one loudspeaker 9 is used as a noise input signal source, and one path of digital audio signal is input to the digital encoder 2, so that noise removal can be realized, the connection structure of the circuit is simplified, and the cost and the process difficulty are reduced.
Referring to fig. 2 and fig. 3, it is further preferable that M is equal to 3, N is equal to 3, and J is equal to 2, so that by using three microphones 1 to collect an external sound source, and inputting three analog audio signals to the digital encoder 2, and simultaneously using one speaker 9 as a noise input signal source, one digital audio signal is input to the digital encoder 2, and another speaker 9 may not be used as a noise input signal source, and only outputs sound, the connection structure of the circuit can be further simplified, and the sound quality of the sound source after denoising can be ensured to be played by the speaker 9 under the condition of reducing cost and process difficulty.
Therefore, three analog signal input interfaces are electrically connected with three microphones 1 to obtain a plurality of target reference digital audio signals, the remaining one digital signal input interface is connected with a loudspeaker 9 to obtain one reference digital audio signal, and four input signals are transmitted to the main control device 5 by the digital encoder 2, so that the main control device 5 can process the obtained three paths of target digital audio signals and one path of reference digital audio signal by means of the existing algorithm, for example, the corresponding reference digital audio signal in the three paths of digital audio signals is subtracted, and the denoised digital audio signal is obtained, thereby ensuring the denoising effect.
Further preferably, the microphones 1 are arranged in a surrounding layout on the terminal of the application and are spaced apart from each other to achieve a sound source sampling of 360 degrees.
Further preferably, the digital encoder 2 further has a first digital signal communication interface electrically connected to the first pin of the main control device 5; the control information corresponding to the digital audio signal is provided to the main control device 5 through the first digital signal communication interface, and is suitable for I2C bus transmission. Here, it is worth mentioning that the model of the digital encoder 2 in this embodiment is Audio Codec ALC 5665.
Further preferably, the digital encoder 2 further has a second digital signal communication interface electrically connected to a second pin of the main control device 5. And the converted digital audio signal information is input into the main control device 5 through the second digital signal communication interface, and the main control device is suitable for I2S bus transmission so as to meet different practical application requirements.
Further preferably, referring to fig. 2 and fig. 3, the digital-to-analog converter 4 in the present embodiment is of a type MT6391, and the Audio amplifier is of a type Audio PAAW 87329.
Further preferably, the digital-to-analog converter 4 has a first digital signal communication interface, and is electrically connected to a third pin of the main control device 5; the digital-to-analog converter 4 is also provided with a first digital signal output interface which is electrically connected with a fourth pin of the main control device 5; the digital-to-analog converter 4 further has a second digital signal output interface electrically connected to the signal input interface of the audio amplifier.
Further preferably, the number of the audio amplifiers is the same as the number of the speakers 9, and the audio amplifiers are in one-to-one correspondence, so as to ensure the sound quality of the microphone 1, and make the microphone 1 multiple, the sound can be played synchronously. As shown in fig. 2, the two audio amplifiers in the present embodiment are preferably provided, namely, the audio amplifier 6 and the audio amplifier 7, which are electrically connected to the corresponding microphone 1 and the microphone 9, respectively.
Further preferably, referring to fig. 2 and fig. 3, the circuit structure of this embodiment further includes a server 8 communicatively connected to the main control device 5. The master control device 5 includes: a processor electrically connected to the digital encoder 2 and the digital-to-analog converter 4, a transmission module electrically connected to the processor and adapted to be communicatively connected to the server 8, and the like. Therefore, in practical use, data information such as user voice obtained through noise reduction processing can be transmitted to the server 8 through the server 8, response information matched with the data information such as the user voice is transmitted to the main control device 5 through the server 8, the data information is converted into audio analog signals through the digital-to-analog converter 4, the audio analog signals are amplified through the audio amplifier 6 and then are played through the loudspeaker 9, voice corresponding to user input information is played, the accuracy of AI interaction is improved, and user experience is further improved. It should be noted that the transmission module may be a WIFI module or a bluetooth module, or may be any one of a 3G module, a 4G module, and a 5G module. In addition, it is worth mentioning that the processor in this embodiment is of the type MT 8176.
To better illustrate the working principle of this implementation, the following examples are given:
for example, when the user speaks a voice of "several clocks at the current time", the microphone 1 of this embodiment can record the voice information, and after the noise in the environment is removed by the circuit structure, the denoised digital audio signal is transmitted to the server 8 by the main control device 5, and the server 8 performs corresponding algorithm extraction on the denoised digital audio signal, so that corresponding response information, for example, response voice data corresponding to "xx minutes in beijing time", is transmitted to the main control device 5, is transmitted to the digital-to-analog converter 4 by the main control device 5, is converted into an audio analog signal, and after being amplified by the audio amplifier 6, the corresponding response voice "xx minutes in beijing time" is played by the speaker 9, thereby completing the AI interaction.
Carry out two
The present embodiment further provides a terminal, which includes the circuit structure of the microphone in the first embodiment.
It can be known from the above that, because the circuit structure of the microphone in the terminal can collect the user's voice and the environmental noise in real time through the microphone 1, when the digital encoder 2 converts the voice collected in real time by the microphone 1 into the corresponding target digital audio signal and inputs the signal to the main control device 5, the response feedback information inputted by the digital encoder 2 can be inputted through the speaker 9, for example, the background sound source information corresponding to the sound source generated by the device itself can be obtained through the communication connection between the digital encoder 2 and the speaker 9, and is converted into the corresponding reference digital audio signal and is inputted to the main control device 5, so that the main control device 5 can perform the drying processing on the target digital audio signal according to the reference digital audio signal to remove the portion representing the environmental noise, thereby better distinguishing the background noise in the collected user's voice under the condition of simplifying the structure, so as to carry out noise reduction processing on the collected user voice subsequently.
It should be noted that the terminal in the present embodiment is preferably any one of a mobile phone, a computer, and a sound box.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (9)
1. A circuit structure of a microphone, comprising:
n microphones, wherein N is a natural number greater than 1;
the digital encoder is in communication connection with the microphone;
the main control device is in communication connection with the digital encoder;
the digital-to-analog converter is in communication connection with the main control device;
the audio amplifier is in communication connection with the digital-to-analog converter;
j loudspeakers are in communication connection with the audio amplifier, wherein J is a natural number larger than 1, and at least one loudspeaker is electrically connected with the digital encoder.
2. The circuit arrangement of claim 1, wherein said digital encoder has M analog signal input interfaces connected to said microphone, and at least K analog signal input interfaces connected to said speaker; wherein M and K are both natural numbers greater than 1, and M is greater than K.
3. The circuit structure of claim 2, wherein K equals 1.
4. The circuit structure of claim 2, wherein M equals 3; said N is equal to 3; said J is equal to 2.
5. The circuit structure of claim 1, wherein the digital encoder further comprises a first digital signal communication interface electrically connected to a first pin of the master control device; and the second digital signal communication interface is electrically connected with the second pin of the main control device.
6. The circuit arrangement of claim 1, wherein said digital-to-analog converter has a first digital signal communication interface electrically connected to a third pin of said master control device; the digital-to-analog converter is also provided with a first digital signal output interface which is electrically connected with a fourth pin of the main control device; the digital-to-analog converter is also provided with a second digital signal output interface which is electrically connected with the signal input interface of the audio amplifier.
7. The circuit arrangement of claim 1, wherein the number of audio amplifiers is the same as the number of speakers and corresponds to one-to-one.
8. The circuit arrangement of any one of claims 1 to 7, further comprising a server communicatively coupled to said master control device; the master control device comprises: the processor is electrically connected with the digital encoder and the digital-to-analog converter, and the transmission module is electrically connected with the processor and is used for being in communication connection with the server.
9. A terminal, characterized in that it comprises a circuit arrangement according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022331452.1U CN213547829U (en) | 2020-10-19 | 2020-10-19 | Circuit structure and terminal of microphone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022331452.1U CN213547829U (en) | 2020-10-19 | 2020-10-19 | Circuit structure and terminal of microphone |
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| CN213547829U true CN213547829U (en) | 2021-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271371A (en) * | 2021-07-15 | 2021-08-17 | 上海豪承信息技术有限公司 | Mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271371A (en) * | 2021-07-15 | 2021-08-17 | 上海豪承信息技术有限公司 | Mobile terminal |
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