Interphone noise reduction system, chip and electronic equipment

Abstract

The invention relates to the technical field of electronic circuits, in particular to an interphone noise reduction system, a chip and electronic equipment, and the interphone noise reduction system comprises a PPT key, an AI noise reduction unit, an input analog audio switching unit and an output analog audio switching unit. The input analog audio switching unit is used for receiving an input first analog audio signal and outputting the first analog audio signal to the AI noise reduction unit; the AI noise reduction unit is used for performing noise reduction processing on the first analog audio signal to obtain a second analog audio signal after noise reduction, and outputting the second analog audio signal to the output analog audio switching unit; and the output analog audio switching unit is used for outputting a second analog audio signal according to the current communication channel. The AI noise reduction unit is adopted to carry out noise reduction processing on the first analog audio signal, interference noise in the audio signal is removed, and the recognized voice signal is more accurate.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a walkie-talkie noise reduction system, chip, and electronic equipment. Background Art

[0002] Driven by demand in scenarios such as public safety, emergency management, and commercial services, the walkie-talkie industry has entered a period of rapid development. With technological advancements, walkie-talkies continue to incorporate new technologies and features, such as intelligent and network-based systems. However, this also introduces new challenges, such as radio frequency interference, audio crosstalk, and recognition errors. Currently, most microphones used in walkie-talkies directly input analog audio into the speaker. This method fails to address these new challenges and, in a growing number of scenarios, results in a poor user experience and limited voice recognition accuracy. Summary of the Invention

[0003] The present application provides a walkie-talkie noise reduction system, chip and electronic device to solve the technical problem of poor voice recognition accuracy in related technologies.

[0004] In a first aspect, the present application provides a walkie-talkie noise reduction system, the walkie-talkie noise reduction system comprising: a PPT button, an AI noise reduction unit, an input analog audio switching unit, and an output analog audio switching unit;

[0005] The PPT button is used to input a signal path switching signal; the signal path switching signal is used to control the input analog audio switching unit and the output analog audio switching unit to switch the communication path;

[0006] The input analog audio switching unit is configured to receive an input first analog audio signal and output the first analog audio signal to the AI ​​noise reduction unit;

[0007] The AI ​​noise reduction unit is configured to perform noise reduction processing on the first analog audio signal to obtain a noise-reduced second analog audio signal, and output the second analog audio signal to the output analog audio switching unit;

[0008] The output analog audio switching unit is used to output the second analog audio signal according to the current communication path.

[0009] In one possible design, the intercom noise reduction system further includes an intercom audio interface, a MIC interface, a power amplifier unit, and a speaker interface;

[0010] The intercom audio interface is respectively communicated with the input analog audio switching unit and the output analog audio switching unit; the input analog audio switching unit is respectively communicated with the MIC interface and the AI ​​noise reduction unit; the output analog audio switching unit is respectively communicated with the AI ​​noise reduction unit and the power amplifier unit, and the power amplifier unit is also communicated with the speaker interface;

[0011] The input analog audio switching unit is used to receive the first analog audio signal input by the MIC interface or the intercom audio interface; the output analog audio switching unit is used to output the second analog audio signal to the intercom audio interface or the power amplifier unit according to the current communication path.

[0012] In one possible design, the AI ​​noise reduction unit is used to output a first channel control signal to the input analog audio switching unit and the output analog audio switching unit respectively when the signal path switching signal is not received; the input analog audio switching unit is used to establish a communication channel with the intercom audio interface according to the first channel control signal, and the output analog audio switching unit is used to establish a communication channel with the power amplifier unit according to the first channel control signal.

[0013] In one possible design, the AI ​​noise reduction unit is used to output a second channel control signal to the input analog audio switching unit and the output analog audio switching unit respectively when receiving the signal path switching signal; the input analog audio switching unit is used to establish a communication channel with the MIC interface according to the second channel control signal, and the output analog audio switching unit is used to establish a communication channel with the intercom audio interface according to the second channel control signal.

[0014] In a possible design, the power amplifier unit is used to amplify the second analog audio signal output by the output analog audio switching unit, and output the amplified second analog audio signal to the speaker interface.

[0015] In one possible design, the speaker interface is used to connect to an external speaker, and the speaker interface is used to output the amplified second analog audio signal to the external speaker, and the external speaker is used to play the second analog audio signal.

[0016] In one possible design, performing noise reduction processing on the first analog audio signal to obtain a noise-reduced second analog audio signal includes:

[0017] Noise mixed in the first analog audio signal is denoised, and human voice in the first analog audio signal is enhanced to obtain the second analog audio signal.

[0018] In one possible design, the intercom noise reduction system also includes a power supply unit, which is electrically connected to the AI ​​noise reduction unit, the input analog audio switching unit, the output analog audio switching unit and the power amplifier unit, respectively, to supply power to the AI ​​noise reduction unit, the input analog audio switching unit, the output analog audio switching unit and the power amplifier unit.

[0019] In a second aspect, the present application further provides a chip, which includes the intercom noise reduction system as described in any one of the above items.

[0020] In a third aspect, the present application further provides an electronic device, comprising the intercom noise reduction system as described in any one of the above items.

[0021] The intercom noise reduction system provided by the above-mentioned first aspect includes: a PPT button, an AI noise reduction unit, an input analog audio switching unit, and an output analog audio switching unit; wherein the PPT button is used to input a signal path switching signal; the signal path switching signal is used to control the input analog audio switching unit and the output analog audio switching unit to switch the communication path; the input analog audio switching unit is used to receive an input first analog audio signal and output the first analog audio signal to the AI ​​noise reduction unit; the AI ​​noise reduction unit is used to perform noise reduction processing on the first analog audio signal to obtain a second analog audio signal after noise reduction, and output the second analog audio signal to the output analog audio switching unit; the output analog audio switching unit is used to output the second analog audio signal according to the current communication path. In this application, the AI ​​noise reduction unit is used to perform noise reduction processing on the first analog audio signal, thereby removing the interference noise in the audio signal and making the recognized voice signal more accurate.

[0022] The beneficial effects provided in the above-mentioned other aspects and the possible designs of the above-mentioned other aspects can be referred to the beneficial effects brought about by the above-mentioned first aspect and the possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of the intercom noise reduction system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a alone, b alone, or c alone can represent: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0025] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present application.

[0026] The terms "connected" and "connect" should be interpreted broadly. For example, "connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is interconnected. It can also refer to internal connectivity between two components. Signal connection can refer not only to signal connection through circuits but also to signal connection through media, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application on a case-by-case basis.

[0027] With the advancement of technology, walkie-talkies are constantly integrating new technologies and new functions. For example, the walkie-talkies currently on the market have integrated intelligent and networked technologies. Intelligent walkie-talkies have functions such as voice recognition and AI voice answering, providing users with a more convenient operating experience, but they also bring new problems, such as radio frequency interference, audio crosstalk, recognition errors, and many other problems. Currently, most of the microphones used on walkie-talkies directly input analog audio into the walkie-talkie output speakers. This method cannot solve the new problems of walkie-talkies and is not good for the user experience in more and more scenarios. It also affects the accuracy of intelligent voice recognition.

[0028] In addition, most handheld microphones directly transmit the uplink microphone analog audio to the intercom and output the downlink intercom analog audio signal to the speaker circuit. This method will record external interference noise when the intercom inputs analog audio, and will play the noise transmitted from another intercom along with its own interference noise when the intercom outputs analog audio.

[0029] In order to overcome the defects in the above-mentioned related technologies, the present application provides a walkie-talkie noise reduction system, which uses an AI (Artificial Intelligence) noise reduction unit to reduce the noise of uplink and downlink analog audio and enhance human voice processing to optimize the user experience and voice recognition accuracy.

[0030] Figure 1 For a schematic diagram of the intercom noise reduction system provided in this application embodiment, please refer to Figure 1 As shown, the present application provides a walkie-talkie noise reduction system, which includes: a PPT (Push-to-Talk) button 10, an AI noise reduction unit 11, an input analog audio switching unit 13 and an output analog audio switching unit 12.

[0031] Among them, the PPT button 10 is used for the user to input the signal path switching signal; the AI ​​noise reduction unit 11 receives the signal path switching signal and outputs it to the input analog audio switching unit 13 and the output analog audio switching unit 12 according to the signal path switching signal. The signal path switching signal is used to control the input analog audio switching unit and the output analog audio switching unit to switch the communication path.

[0032] The input analog audio switching unit 13 is configured to receive an input first analog audio signal and output the first analog audio signal to the AI ​​noise reduction unit 11 .

[0033] Among them, the AI ​​noise reduction unit 11 is used to perform noise reduction processing on the first analog audio signal input by the input analog audio switching unit 13 to obtain a noise-reduced second analog audio signal, and output the second analog audio signal to the output analog audio switching unit 12.

[0034] Finally, the output analog audio switching unit 12 is used to output the second analog audio signal after the noise reduction process to the corresponding functional unit or functional interface according to the current communication path.

[0035] Among them, when the user uses the walkie-talkie to talk in a noisy environment, the human voice is mixed with the environmental noise, and some interference noise of the walkie-talkie itself is superimposed, resulting in unclear conversation between the two parties. At this time, it is necessary to suppress the noise and enhance the human voice, so as to optimize the call quality. If only the uplink analog audio is denoised, only the analog audio human voice input to the walkie-talkie can be made clear, but the noise of the walkie-talkie itself and the analog audio mixed with noise output by it cannot be processed. In order to overcome the above technical defects, this embodiment proposes an uplink and downlink noise reduction system for walkie-talkie microphones. This embodiment uses an AI noise reduction unit 11 to process the uplink and downlink analog audio to suppress noise and enhance the human voice, that is, to denoise the noise mixed in the first analog audio signal and enhance the human voice in the first analog audio signal to obtain a second analog audio signal after noise reduction, thereby optimizing the call quality.

[0036] In one embodiment of the present application, the noise reduction chip in the AI ​​noise reduction unit 11 uses an AI algorithm to determine the noise and human voice in the input analog audio, removes noise other than the human voice by lowering the volume / removing noise, and adds or subtracts the volume of human voices of different frequencies, and outputs analog audio after comprehensive superposition to achieve human voice enhancement processing.

[0037] Please continue to see Figure 1 As shown, the intercom noise reduction system provided in this embodiment also includes an intercom audio interface 14, a MIC (Media Interface Connector) interface 15, a power amplifier unit 16, and a speaker interface 17. Among them, the intercom audio interface 14 is respectively connected to the input analog audio switching unit 13 and the output analog audio switching unit 12; the input analog audio switching unit 13 is respectively connected to the MIC interface 15 and the AI ​​noise reduction unit 11; the output analog audio switching unit 12 is respectively connected to the AI ​​noise reduction unit 11 and the power amplifier unit 16, and the power amplifier unit 16 is also connected to the speaker interface 17.

[0038] Among them, the PPT button 10 is the core function button for realizing calls in the intercom. Its core function is to trigger voice transmission by pressing it and automatically switch back to the receiving mode when released.

[0039] Among them, the input analog audio switching unit 13 is used to receive the first analog audio signal input by the MIC interface 15 or the intercom audio interface 14; the output analog audio switching unit 12 is used to output the second analog audio signal to the intercom audio interface 14 or the power amplifier unit 16 according to the current communication path.

[0040] In one embodiment of the present application, the AI ​​noise reduction unit 11 is used to output a first channel control signal to the input analog audio switching unit 13 and the output analog audio switching unit 12 respectively when no signal path switching signal is received; the input analog audio switching unit 13 is used to establish a communication channel with the intercom audio interface 14 according to the first channel control signal, and the output analog audio switching unit 12 is used to establish a communication channel with the power amplifier unit 16 according to the first channel control signal.

[0041] In other words, when the PTT button 11 is not pressed, the AI ​​noise reduction unit 11 is equivalent to not receiving the signal path switching signal, then the AI ​​noise reduction unit 11 controls the input analog audio switching unit 13 and the output analog audio switching unit 12 to switch to the downlink path. At this time, the input analog audio switching unit 13 path is: the intercom audio interface 14 outputs the received first audio analog signal to the AI ​​noise reduction unit 11 through the input analog audio switching unit 13; the AI ​​noise reduction unit 11 performs noise reduction processing on the received first audio analog signal to obtain a second audio analog signal after noise reduction processing; the output analog audio switching unit 12 path is: the second audio analog signal output by the AI ​​noise reduction unit 11 is output to the power amplifier unit 16, the power amplifier unit 16 is connected to the speaker interface 17, and the speaker interface 17 is connected to the external speaker. At this time, the other party's voice is transmitted through the intercom and output to the speaker through this application to transmit the other party's voice.

[0042] In one embodiment of the present application, the AI ​​noise reduction unit 11 is used to output a second channel control signal to the input analog audio switching unit 13 and the output analog audio switching unit 12 respectively when receiving a signal path switching signal; the input analog audio switching unit 13 is used to establish a communication channel with the MIC interface 15 according to the second channel control signal, and the output analog audio switching unit 12 is used to establish a communication channel with the intercom audio interface 14 according to the second channel control signal.

[0043] In other words, when the user presses the PTT button 10, the AI ​​noise reduction unit 11 receives the signal path switching signal, and controls the input analog audio switching unit 13 and the output analog audio switching unit 12 to switch to the uplink path. At this time, the input analog audio switching unit 13 path is: the first audio analog signal input by the MIC interface 15 is input to the AI ​​noise reduction unit 11, and the output analog audio switching unit 12 path is: the second audio analog signal output by the AI ​​noise reduction unit 11 is output to the intercom audio interface 14 for audio output. At this time, the speech of the speaker is output to the intercom through the noise reduction of this application and then transmitted to the other party's intercom through the intercom, and the other party's speaker outputs the speaker's own voice.

[0044] The power amplifier unit 16 is configured to amplify the second analog audio signal output by the analog audio switching unit 12 and output the amplified second analog audio signal to the speaker interface 17. The speaker interface 17 is configured to connect to an external speaker. The speaker interface is configured to output the amplified second analog audio signal to the external speaker, which is configured to play the second analog audio signal.

[0045] Among them, the intercom noise reduction system also includes a power supply unit 18, which is electrically connected to the AI ​​noise reduction unit 11, the input analog audio switching unit 13, the output analog audio switching unit 12 and the power amplifier unit 16 respectively to supply power to the AI ​​noise reduction unit 11, the input analog audio switching unit 13, the output analog audio switching unit 12 and the power amplifier unit 16.

[0046] Specifically, in one embodiment of the present application, the intercom noise reduction system also includes a mainboard, and the above-mentioned AI noise reduction unit 11, input analog audio switching unit 13, output analog audio switching unit 12, power amplifier unit 16, speaker interface 17, MIC interface 15 and intercom audio interface 14 are all arranged on the mainboard, and the power supply unit 18 directly supplies power to the mainboard, thereby indirectly supplying power to the above-mentioned functional units and interfaces.

[0047] In one embodiment, the power supply unit 18 includes an energy storage battery and a battery management system (BMS), and the battery management system is responsible for monitoring and protecting the battery.

[0048] Among them, the AI ​​noise reduction unit 11 of this embodiment can be composed of a common AI noise reduction chip and its related peripheral circuits, the power amplifier unit 16 is composed of a power amplifier chip and its related circuit components, and the input analog audio switching unit 13 and the output analog audio switching unit 12 are composed of two single-pole double-set switches and MOS (Metal Oxide Semiconductor Field Effect Transistor) tube control circuits.

[0049] Among them, the intercom audio interface 14 is connected to the main system of the intercom to realize wireless communication and signal modulation; for example, the intercom noise reduction system also includes a wireless communication unit, which is communicatively connected to the intercom audio interface 14; the wireless communication unit includes a transmitting module, a receiving module, and a modulation and demodulation module, etc.

[0050] The MIC interface 15 is connected to a MIC (such as a microphone head or a microphone), and is mainly responsible for converting sound signals into electrical signals to realize the voice collection and transmission functions of the intercom.

[0051] An embodiment of the present application also provides a chip, which includes the intercom noise reduction system provided in the above embodiment.

[0052] An embodiment of the present application also provides an electronic device, which may be a walkie-talkie or other electronic device (such as a smart communication device or a wearable device), and the electronic device includes the walkie-talkie noise reduction system provided in the above embodiments.

[0053] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A walkie-talkie noise reduction system, characterized in that: The intercom noise reduction system includes: a PPT button, an AI noise reduction unit, an input analog audio switching unit, and an output analog audio switching unit; The PPT button is used to input a signal path switching signal; the signal path switching signal is used to control the input analog audio switching unit and the output analog audio switching unit to switch the communication path; The input analog audio switching unit is configured to receive an input first analog audio signal and output the first analog audio signal to the AI ​​noise reduction unit; The AI ​​noise reduction unit is configured to perform noise reduction processing on the first analog audio signal to obtain a noise-reduced second analog audio signal, and output the second analog audio signal to the output analog audio switching unit; The output analog audio switching unit is used to output the second analog audio signal according to the current communication path.

2. The intercom noise reduction system according to claim 1, characterized in that: The intercom noise reduction system also includes an intercom audio interface, a MIC interface, an amplifier unit and a speaker interface; The intercom audio interface is respectively communicated with the input analog audio switching unit and the output analog audio switching unit; the input analog audio switching unit is respectively communicated with the MIC interface and the AI ​​noise reduction unit; the output analog audio switching unit is respectively communicated with the AI ​​noise reduction unit and the power amplifier unit, and the power amplifier unit is also communicated with the speaker interface; The input analog audio switching unit is used to receive the first analog audio signal input by the MIC interface or the intercom audio interface; the output analog audio switching unit is used to output the second analog audio signal to the intercom audio interface or the power amplifier unit according to the current communication path.

3. The intercom noise reduction system according to claim 2, characterized in that: The AI ​​noise reduction unit is used to output a first channel control signal to the input analog audio switching unit and the output analog audio switching unit respectively when the signal path switching signal is not received; the input analog audio switching unit is used to establish a communication channel with the intercom audio interface according to the first channel control signal, and the output analog audio switching unit is used to establish a communication channel with the power amplifier unit according to the first channel control signal.

4. The intercom noise reduction system according to claim 2, characterized in that: The AI ​​noise reduction unit is used to output a second channel control signal to the input analog audio switching unit and the output analog audio switching unit respectively when receiving the signal path switching signal; the input analog audio switching unit is used to establish a communication channel with the MIC interface according to the second channel control signal, and the output analog audio switching unit is used to establish a communication channel with the intercom audio interface according to the second channel control signal.

5. The intercom noise reduction system according to claim 2, characterized in that: The power amplifier unit is used to amplify the second analog audio signal output by the output analog audio switching unit, and output the amplified second analog audio signal to the speaker interface.

6. The intercom noise reduction system according to claim 5, characterized in that: The speaker interface is used to connect to an external speaker. The speaker interface is used to output the amplified second analog audio signal to the external speaker. The external speaker is used to play the second analog audio signal.

7. The intercom noise reduction system according to claim 1, characterized in that: The performing noise reduction processing on the first analog audio signal to obtain a noise-reduced second analog audio signal includes: Noise mixed in the first analog audio signal is denoised, and human voice in the first analog audio signal is enhanced to obtain the second analog audio signal.

8. The intercom noise reduction system according to claim 2, characterized in that: The intercom noise reduction system also includes a power supply unit, which is electrically connected to the AI ​​noise reduction unit, the input analog audio switching unit, the output analog audio switching unit and the power amplifier unit respectively to supply power to the AI ​​noise reduction unit, the input analog audio switching unit, the output analog audio switching unit and the power amplifier unit.

9. A chip, characterized in that: The chip includes the intercom noise reduction system according to any one of claims 1 to 8.

10. An electronic device, characterized in that: The electronic device includes the intercom noise reduction system according to any one of claims 1 to 8.

Images