WO2022199222A1

WO2022199222A1 - Noise reduction method and apparatus for audio playing device, and electronic device and storage medium

Info

Publication number: WO2022199222A1
Application number: PCT/CN2022/071086
Authority: WO
Inventors: 刘绍斌
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-03-26
Filing date: 2022-01-10
Publication date: 2022-09-29
Also published as: CN115134711A

Abstract

Disclosed in the present application are a noise reduction method and apparatus for an audio playing device, and an electronic device and a storage medium, relating to the technical field of electronic devices. The method is applied to an audio playing device. The method comprises: acquiring a target noise signal of an audio playing device, wherein the target noise signal is caused by the audio playing device performing Bluetooth communication; generating an inverted signal according to the target noise signal, wherein the waveform phase of the target noise signal is opposite to that of the inverted signal; and playing the inverted signal. According to the noise reduction method and apparatus for an audio playing device, and the electronic device and the storage medium provided in the embodiments of the present application, by means of playing an inverted signal of which the waveform phase is opposite to that of a target noise signal of the audio playing device, the impact of the target noise signal is reduced, a small-volume design of the audio playing device is realized, and the usage experience of a user is improved.

Description

Noise reduction method, device, electronic device and storage medium for audio playback equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Application No. CN202110332705.3 filed on March 26, 2021, which is hereby incorporated by reference in its entirety for all purposes.

technical field

The present application relates to the technical field of electronic devices, and more particularly, to a noise reduction method, apparatus, electronic device, and storage medium for audio playback devices.

Background technique

With the development of science and technology, audio playback equipment has become more and more widely used and has more and more functions, which has become one of the must-haves in people's daily life.

SUMMARY OF THE INVENTION

In view of the above problems, the present application proposes a noise reduction method, device, electronic device and storage medium for audio playback equipment to solve the above problems.

In a first aspect, an embodiment of the present application provides a noise reduction method for an audio playback device, which is applied to the audio playback device. The method includes: acquiring a target noise signal of the audio playback device, wherein the target noise signal is composed of The audio playback device performs Bluetooth communication; generates an inverted signal according to the target noise signal, wherein the target noise signal is opposite to the waveform phase of the inverted signal; and plays the inverted signal.

In a second aspect, an embodiment of the present application provides a noise reduction method for an audio playback device, which is applied to an audio playback device. The method includes: acquiring a noise signal of a target frequency, where the target frequency is the same as the audio playback device. The frequencies of the current acoustic signals caused by the Bluetooth communication are the same or the frequency difference is in a preset range; an inverted signal is generated according to the noise signal of the target frequency, wherein the noise signal of the target frequency and the waveform of the inverted signal are The phase is reversed; the reversed signal is played.

In a third aspect, an embodiment of the present application provides a noise reduction device for an audio playback device, which is applied to the audio playback device. The device includes: a target noise signal acquisition module, configured to acquire a target noise signal of the audio playback device, Wherein, the target noise signal is caused by Bluetooth communication performed by the audio playback device; an inversion signal generating module is configured to generate an inversion signal according to the target noise signal, wherein the target noise signal and the inversion signal The phase of the waveform is opposite; the inversion signal playing module is used to play the inversion signal.

In a fourth aspect, an embodiment of the present application provides a noise reduction device for an audio playback device, which is applied to the audio playback device. The device includes: a noise signal acquisition module for acquiring a noise signal of a target frequency, wherein the target The frequency is the same as the frequency of the current acoustic signal caused by the Bluetooth communication of the audio playback device or the frequency difference is in a preset range; the inversion signal generation module is used to generate an inversion signal according to the noise signal of the target frequency, wherein, The noise signal of the target frequency is opposite to the waveform phase of the inverted signal; the inverted signal playing module is used for playing the inverted signal.

In a fifth aspect, an embodiment of the present application provides an electronic device, including a memory and a processor, the memory is coupled to the processor, the memory stores an instruction, and the instruction is executed when the instruction is executed by the processor. The processor executes the above method.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, where a program code is stored in the computer-readable storage medium, and the program code can be invoked by a processor to execute the above method.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 shows a schematic diagram of an application environment of the noise reduction method applicable to the audio playback device provided by the embodiment of the present application

FIG. 2 shows a block diagram of an electronic device for implementing the noise reduction method for an audio playback device according to an embodiment of the present application;

3 shows a schematic flowchart of a noise reduction method for an audio playback device provided by an embodiment of the present application;

FIG. 4 shows a spectrogram of a target noise signal provided by an embodiment of the present application;

FIG. 5 shows a spectrum diagram of an inverted signal provided by an embodiment of the present application;

6 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application;

FIG. 7 shows a schematic flowchart of step S210 of the audio playback device shown in FIG. 6 of the present application;

8 shows a schematic flowchart of a noise reduction method for an audio playback device provided by still another embodiment of the present application;

FIG. 9 shows a schematic diagram of the current change of the audio playback device provided by the embodiment of the present application during communication;

10 shows a schematic flowchart of a noise reduction method for an audio playback device provided by another embodiment of the present application;

11 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application;

12 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application;

13 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application;

14 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application;

15 shows a block diagram of a module of a noise reduction apparatus of an audio playback device provided by an embodiment of the present application;

FIG. 16 shows a block diagram of a module of a noise reduction apparatus of an audio playback device provided by yet another embodiment of the present application;

FIG. 17 shows a storage unit for storing or carrying a program code for implementing the noise reduction method for an audio playback device according to an embodiment of the present application, according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

With the development of science and technology, audio playback equipment has become more and more widely used and has more and more functions, which has become one of the must-haves in people's daily life. Noise, the noise is generally referred to as the noise floor. Among them, the noise floor mainly includes two categories: one is the current sound, the source of the current sound is mainly caused by the interference of electronic components to the speaker, and the electronic components can include power Inductors, etc., batteries, for example, the source of the current sound can be caused by the interference of the battery to the speaker, and the other type is white noise, which is mainly related to the chip itself.

At present, reducing the noise floor such as current sound is generally achieved by increasing the distance between electronic components, for example, by increasing the distance between the battery and the speaker, wherein after the distance between the battery and the speaker is increased, the battery radiates The interference of the output power to the speaker is reduced, so that the noise generated will be reduced. However, with this method of reducing the noise floor, for a relatively small audio playback device, due to space constraints, the speaker cannot be far away from the battery, and the radiation on the battery will still interfere with the speaker. Therefore, the audio playback device cannot be well reduced. In order to keep the battery away from the speaker, the distance between the two will be increased, which will cause the volume of the audio playback device to be too large and affect the aesthetics and experience of the audio playback device.

In view of the above problems, the inventor has discovered through long-term research, and proposed a noise reduction method, device, electronic device and storage medium for an audio playback device provided by the embodiments of the present application. By playing the waveform phase of the target noise signal of the audio playback device The opposite phase signal is used to reduce the influence of the target noise signal, and realize the small size design of the audio playback device to improve the user experience. The specific noise reduction method of the audio playback device will be described in detail in the following embodiments.

The following will describe an application environment applicable to the noise reduction method of the audio playback device provided by the embodiments of the present application.

Referring to FIG. 1 , FIG. 1 shows a schematic diagram of an application environment of the noise reduction method applicable to the audio playback device provided by the embodiment of the present application. As shown in FIG. 1 , it includes an audio playback device 100 and an audio providing device 200. The audio playback device 100 may include headphones, speakers, etc. Of course, the audio playback device 100 may also include other devices with audio playback functions, which will not be described here. limited. The audio providing device 200 may include a smart phone, a tablet computer, a smart watch, a computer, a wearable electronic device, etc. Of course, the audio providing device 200 may also include other devices having an audio providing function, which is not limited herein. In this application scenario, the audio providing device 200 can be used as an audio providing device to send audio content to the audio playing device 100 for playback.

In some embodiments, the audio playback device 100 and the audio providing device 200 may communicate to complete data interaction. Wherein, the audio playback device 100 and the audio providing device 200 may communicate with each other through a local area network (LAN), and may also communicate with each other through a wide area network (WAN). For example, the audio playback device 100 and the audio providing device 200 may be connected to a router at the same time, and the audio playback device 100 and the audio providing device 200 may communicate through the local area network provided by the router; for another example, the audio playback device 100 and the audio providing device 200 may Communicate with the cloud, and realize the data interaction between the two through the cloud; for another example, the audio playback device 100 and the audio providing device 200 can also establish an end-to-end network connection (ie P2P) through Bluetooth, Zigbee, WebRTC and other communication methods. network connection) and communicate over the established network connection. Of course, the communication manner between the audio playing device 100 and the audio providing device 200 may not be limited.

In this embodiment, the audio playback device 100 communicates with the audio providing device 200 through Bluetooth. As shown in FIG. 1 , the audio playback device 100 can be a true wireless stereo (true wireless stereo, TWS) headset, the audio providing device 200 can be a smartphone, and the audio playing device 100 and the audio providing device 200 communicate through Bluetooth, then the TWS headset Audio data can be acquired and played back from a smartphone via Bluetooth technology.

Referring to FIG. 2 , FIG. 2 shows a module block diagram of an audio playback device 100 provided by an embodiment of the present application. The audio playback device 100 may be an audio playback device with Bluetooth communication technology, such as a Bluetooth headset, a Bluetooth speaker, or the like. The audio playback device 100 in the present application may include one or more of the following components: a processor 110, a memory 120, a Bluetooth module 130, a power module 140, an audio module 150, and one or more application programs, wherein one or more application programs The one or more programs, which may be stored in the memory 120 and configured to be executed by the one or more processors 110, are configured to perform the methods as described in the foregoing method embodiments.

In one way, the processor 110 is respectively connected to the memory 120 , the Bluetooth module 130 , the power module 140 and the audio module 150 , and the power module 140 is respectively connected to the processor 110 , the memory 120 , the Bluetooth module 130 and the audio module 150 . The processor 110 is used for the control of the entire system, such as controlling charging, audio signal processing, etc. The Bluetooth module 130 is mainly used for communication between the audio playback device 100 and the audio providing device 200. When the audio playback device is a TWS headset, it is also used. For the communication between the left and right earphones, the power supply module 140 is used to supply power to each module in the audio playback device 100, and the audio module 150 includes speakers, microphones, etc., used for audio playback and audio collection.

The processor 110 may include one or more processing cores. The processor 110 uses various interfaces and lines to connect various parts in the entire audio playback device 100, and by running or executing the instructions, programs, code sets or instruction sets stored in the memory 120, and calling the data stored in the memory 120, Various functions of the electronic device 100 are executed and data is processed. Optionally, the processor 110 may adopt at least one of a digital signal processing (Digital Signal Processing, DSP), a Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and a Programmable Logic Array (Programmable Logic Array, PLA). A hardware form is implemented. The processor 110 may integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU), a modem, and the like. Among them, the CPU mainly handles the operating system, user interface, and application programs; the GPU is used to render and draw the content to be displayed; the modem is used to handle wireless communication. It can be understood that, the above-mentioned modem may also not be integrated into the processor 110, and is implemented by a communication chip alone.

The memory 120 may include random access memory (Random Access Memory, RAM), or may include read-only memory (Read-Only Memory). Memory 120 may be used to store instructions, programs, codes, sets of codes, or sets of instructions. The memory 120 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.) , instructions for implementing the following method embodiments, and the like. The storage data area may also store data (such as phone book, audio and video data, chat record data) created by the audio playback device 100 in use.

The inventor found that during part or all of the bluetooth communication, some audio playback devices (such as bluetooth earphones) will produce current sound of a specific frequency. After further research, it is found that, especially in the process of establishing a bluetooth connection, the current sound occurs. more prominent. Establishing a Bluetooth connection can be the first connection with other Bluetooth devices, or the re-establishment of a Bluetooth connection (reconnection) with a certain Bluetooth device, or the connection process of re-pairing after the Bluetooth connection information is erased. Generally speaking, in the process of establishing a Bluetooth connection, the Bluetooth device may be in the states of page page, page scan page scan, inquiry inquiry, inquiry scan inquiry scan, etc., and may switch between different states. The inventor's research found that, especially in the paging or query state, it is necessary to send bluetooth signals, such as ID packets, in each frequency band according to the bluetooth frequency hopping protocol, and wait for feedback, so that the bluetooth signal is transmitted and the bluetooth signal is not transmitted alternately. become more frequent, and the fluctuation of the output current of the power supply will increase, which may cause electronic devices such as batteries and inductors to generate a large electromagnetic field, which in turn interferes with sensitive devices such as speakers to generate noise such as current sound. Taking the Bluetooth headset as an example, if the Bluetooth connection is suddenly disconnected during the user's use, the main headset of the Bluetooth headset will enter the paging state to try to connect to the mobile phone. In the paging state, due to the frequent transmission of ID packets and waiting for feedback , resulting in large and frequent changes in the output current of the power supply, which may generate large electromagnetic fields such as batteries and power inductors, which in turn interfere with speakers, etc. to generate current sound (target noise signal).

Please refer to FIG. 3 , which shows a schematic flowchart of a noise reduction method for an audio playback device provided by an embodiment of the present application. The noise reduction method of the audio playback device is used for reducing the influence of the target noise signal by playing a reversed-phase signal that is opposite to the waveform phase of the target noise signal of the audio playback device, and realizes the small size design of the audio playback device and improves the user experience. user experience. In a specific embodiment, the noise reduction method of the audio playback device is applied to the noise reduction device 300 of the audio playback device shown in FIG. 15 and the electronic device 100 configured with the noise reduction device 300 of the audio playback device (FIG. 2 ). The following will take an audio playback device as an example to describe the specific process of this embodiment. Of course, it can be understood that the electronic device applied in this embodiment may be an audio playback device based on Bluetooth communication technology, such as a Bluetooth headset and a Bluetooth speaker. Not limited. The process shown in FIG. 3 will be described in detail below, and the noise reduction method of the audio playback device may specifically include the following steps:

Step S110: Acquire a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device.

Among them, when the Bluetooth function of the audio playback device is turned on, the audio playback device will perform Bluetooth communication. For example, the audio playback device will perform Bluetooth communication with other Bluetooth devices (such as audio providing devices). When the audio playback device performs Bluetooth communication, it will generate Noise signal, denoted as target noise signal. In one way, the frequency of the target noise signal generated by the audio playback device based on the Bluetooth communication is fixed, for example, the target noise signal with a frequency of 800 Hz or a harmonic of 800 Hz is generated. Therefore, in this embodiment, in order to perform noise reduction processing on the to-be-processed noise signal of the audio playback device, the target noise signal can be acquired, and the target noise signal can be subjected to targeted noise reduction processing.

In some embodiments, the audio playback device may preset the target noise signal acquired by pre-collection, and regard other sounds collected in the environment that are not belonging to the target noise signal as environmental noise signals.

As a way, the audio playback device can preset the target noise signal and obtain the target sound quality corresponding to the target noise signal, and use the target sound quality as the basis for judging the collected sound in the environment where it is located. Therefore, in this embodiment When the audio playback device collects the sound in the environment through the microphone, it can obtain the sound quality of the collected sound in the environment, and compare the sound quality of the sound in the environment with the target sound quality to get Determine whether the sound quality of the sound in the environment matches the target sound quality, wherein, when the judgment result indicates that the sound quality of the sound in the environment matches the target sound quality, it can be determined that the sound in the environment is the target noise signal, on the contrary Specifically, when the judgment result indicates that the sound quality of the sound in the environment does not match the target sound quality, it can be determined that the sound in the environment is an ambient noise signal.

As another way, the audio playback device can preset the target noise signal and obtain the target decibel corresponding to the target noise signal, and use the target decibel as the basis for judging the collected sound in the environment where it is located. Therefore, in this implementation In an example, when the audio playback device collects the sound in the environment through the microphone, it can obtain the decibel of the collected sound in the environment, and compare the decibel of the sound in the environment with the target decibel, To determine whether the decibel of the sound in the environment matches the target decibel, wherein, when the judgment result indicates that the decibel of the sound in the environment matches the target decibel, it can be determined that the sound in the environment is the target noise signal, Conversely, when the determination result indicates that the decibel of the sound in the environment does not match the target decibel, it can be determined that the sound in the environment is an ambient noise signal. Wherein, when the decibel of the sound is higher than the preset value, it can be considered that the sound does not match the target decibel, and when the decibel of the sound is not higher than the preset value, it can be considered that the sound matches the target decibel.

As a further way, when collecting and acquiring the noise signal, the source of the collected noise signal can be detected, and when it is detected that the source of the collected noise signal is an audio playback device, the collected noise signal can be It is determined as the target noise signal, and when it is detected that the source of the collected noise signal is not the audio playback device, the collected noise signal can be determined as the environmental noise signal.

In some embodiments, the audio playback device may be a TWS earphone, wherein two metal pins are provided at the bottom of the TWS earphone. When the TWS earphone is placed in the charging box, the circuit between the TWS earphone and the charging box is conducted. , so that you can use the charging case to charge the TWS headset. Among them, the common TWS headset has two metal pins or three metal pins, which are located at the corresponding positions of the TWS headset and the charging box. When the TWS headset is placed in the charging box, the metal pins on the TWS headset and the charging box The metal pins on the box are just in contact to charge and place the TWS earphones. In addition, when the TWS earphones are taken out of the charging box, the TWS earphones can automatically turn on and attempt to communicate with other bluetooth devices. Bluetooth connection. Based on this, it is possible to detect whether the TWS earphone is taken out of the charging box. When it is detected that the TWS earphone is taken out of the charging box, it indicates that the TWS earphone starts to perform Bluetooth communication, and the target noise signal of the audio playback device can be obtained. When it is detected that the TWS earphone is placed in the charging box, it indicates that the TWS earphone starts to perform Bluetooth communication, and the target noise signal of the audio playback device may not be acquired.

In some embodiments, the audio playback device may be a Bluetooth speaker, wherein the Bluetooth speaker may be provided with a Bluetooth switch. Based on this, the status information of the Bluetooth switch of the Bluetooth speaker can be detected, wherein, when it is detected that the status information of the Bluetooth switch of the Bluetooth speaker is in an on state, it indicates that the Bluetooth speaker starts to perform Bluetooth communication, and the information of the audio playback device can be obtained. Target noise signal, when it is detected that the Bluetooth switch of the Bluetooth speaker is turned off, it indicates that the Bluetooth speaker has not started Bluetooth communication, and the target noise signal of the audio playback device may not be obtained.

Step S120: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

In this embodiment, after acquiring the target noise signal of the audio playback device, an inverted signal may be generated according to the target noise signal, wherein the generated inverted signal and the waveform of the target noise signal are in opposite phase. In some embodiments, after the target noise signal is acquired, a spectrum of the target noise signal can be calculated, and an inverted signal with opposite phases and the same amplitude is generated based on the spectrum of the target noise signal.

Please refer to FIG. 4 and FIG. 5 , wherein FIG. 4 shows a spectrogram of a target noise signal provided by an embodiment of the present application, and FIG. 5 shows a spectrogram of an inverted signal provided by an embodiment of the present application, as shown in FIG. 4 and As shown in Fig. 5, the waveforms of the target noise signal and the inverted signal have opposite phases.

Step S130: Play the inverted signal.

In this embodiment, after the inverted signal is acquired, the inverted signal can be played. Since the waveforms of the inverted signal and the target noise signal are in opposite phases, playing the inverted signal can cancel the target noise signal, thereby reducing the target noise. The effect of noise signals. In addition, since the target noise signal is canceled by the inverted signal in this embodiment, it is not necessary to increase the distance between the electronic components, and the compact design of the audio playback device can be realized.

In some embodiments, after the audio data path between the audio playing device and the audio providing device is opened, the audio playing device can receive the audio data sent by the audio providing device, and play the audio data and the inverted signal together. It is understandable that , at this time, the inverted signal and the target noise signal cancel each other out, and the audio playback device finally outputs audio data, thereby improving the user experience.

In some embodiments, the audio playback device may preset and store a volume threshold, where the volume threshold is used as a basis for judging the volume of the audio output by the audio playback device. Therefore, in this embodiment, the volume of the audio output by the audio playback device can be detected, and after detecting the volume of the audio output by the audio playback device, the volume of the output audio can be compared with the volume threshold to determine the output Whether the volume of the audio is less than the volume threshold, when the volume of the output audio is less than the volume threshold, it can be considered that the audio output by the audio playback device cannot cover the target noise signal, and the inverted signal can be played. When the volume of the audio is not less than the volume threshold, it can be considered that the audio output by the audio playback device can cover the target noise signal, and the inverted signal may not be played to reduce the power consumption of the audio playback device.

In some embodiments, the audio playback device may preset and store a power threshold, and the power threshold is used as a basis for judging the remaining power of the audio playback device. Therefore, in this embodiment, the remaining power of the audio playback device can be detected, and after the remaining power of the audio playback device is detected, the remaining power can be compared with the power threshold to determine whether the remaining power is greater than the power threshold. When the power is greater than the power threshold, it can be considered that the audio playback device has enough remaining power to play the inverted signal, and the inverted signal can be played. When the remaining power is not greater than the power threshold, it can be considered that the audio playback device does not have enough remaining power to play If the inverted signal is used, the inverted signal may not be played, so as to reduce the power consumption of the audio playback device.

An embodiment of the present application provides a noise reduction method for an audio playback device, which acquires a target noise signal of the audio playback device, where the target noise signal is caused by Bluetooth communication performed by the audio playback device, and generates an inverted signal according to the target noise signal, wherein the target noise signal is The noise signal is opposite to the waveform phase of the inverted signal, and the inverted signal is played, so as to reduce the influence of the target noise signal by playing the inverted signal with the opposite phase to the waveform of the target noise signal of the audio playback device, and realize the audio playback device. Small size design, improve user experience.

Referring to FIG. 6, FIG. 6 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application. The method is applied to the above-mentioned audio playback device, and the flow shown in FIG. 6 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following steps:

Step S210: During part or all of the Bluetooth communication, acquire the target noise signal, where the target noise signal is caused by the audio playback device performing Bluetooth communication.

In some embodiments, during part or all of the Bluetooth communication, the audio playback device may generate a current sound of a specific frequency, that is, during part or all of the Bluetooth communication, the audio playback device may generate noise signals to be processed. Therefore, in this embodiment, the target noise signal can be acquired during part or all of the Bluetooth communication.

In some implementations, since the current sound is more prominent in the audio playback device during the process of establishing the Bluetooth connection, that is, during part or all of the process of establishing the Bluetooth connection, the noise signal to be processed generated by the audio playback device is more prominent. The situation is more obvious. Therefore, in this embodiment, the target noise signal may be acquired during part or all of the process of establishing the Bluetooth connection.

In some embodiments, the fluctuation of the output current of the power supply will increase when in the paging or query state, which may cause electronic devices such as batteries and inductors to generate a large electromagnetic field, thereby interfering with sensitive devices such as speakers to generate current sound. Equal noise, that is, during part or all of the process of Bluetooth paging or Bluetooth inquiry, the situation of the to-be-processed noise signal generated by the audio playback device is more pronounced. Therefore, in this embodiment, the target noise signal can be acquired in part or all of the process of Bluetooth paging or Bluetooth query.

In some embodiments, when the audio playback device transmits a Bluetooth signal, the power consumption of the entire system of the audio playback device will be very large, so the current drawn from the power supply module will also be relatively large, then, when the current is large, it flows through the audio module The electromagnetic field of the coil (such as a speaker) will also be relatively large, that is, the noise signal will be relatively large, that is, during part or all of the process of transmitting the Bluetooth signal by the audio playback device, the situation of the to-be-processed noise signal generated by the audio playback device is more obvious. Therefore, in this embodiment, the target noise signal may be acquired during part or all of the process of transmitting the Bluetooth signal by the audio playback device.

Please refer to FIG. 7 , which shows a schematic flowchart of step S210 of the audio playback device shown in FIG. 6 of the present application. The flow shown in FIG. 7 will be described in detail below, and the method may specifically include the following steps:

Step S211: Acquire current acoustic signals during part or all of the Bluetooth communication.

In some embodiments, during the Bluetooth communication process of the audio playback device, the battery and/or inductor may generate an equivalent electric field due to the transmission of Bluetooth signals, thereby interfering with the components of the audio playback device, such as sensitive devices such as speakers, thereby generating current acoustic signals , that is, noise, which affects the user experience. Specifically, when the Bluetooth signal is transmitted, the power consumption of the entire system of the audio playback device will be very large, so the current drawn from the power module will also be relatively large, then, when the current is large, the electromagnetic field flowing through the coil of the audio module (such as a speaker) It will also be relatively large, which will generate a fixed-frequency current sound signal on the audio module, that is, noise, which affects the user experience. Therefore, in this embodiment, the current acoustic signal can be acquired during part or all of the Bluetooth communication.

Step S212: Determine the current acoustic signal as the target noise signal.

In this embodiment, since the current acoustic signal generated inside the audio playback device will generate noise, after acquiring the current acoustic signal, the current acoustic signal can be determined as the target noise signal, so as to cancel the current through the subsequently generated inverse signal Sound signal, improve user experience.

Step S220: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

Step S230: Play the inverted signal.

Wherein, the specific description of steps S220-step S230 can refer to steps S120-step S130, and details are not repeated here.

In a noise reduction method for an audio playback device provided by another embodiment of the present application, a target noise signal is acquired during part or all of the Bluetooth communication process, wherein the target noise signal is caused by the audio playback device performing Bluetooth communication, according to the target noise signal The signal generates an inverted signal, in which the target noise signal is in opposite phase to the waveform of the inverted signal, playing the inverted signal. Compared with the noise reduction method of the audio playback device shown in FIG. 3 , this embodiment also obtains the target noise signal during part or all of the Bluetooth communication process, and plays the waveform phase opposite to that of the target noise signal of the audio playback device. , to improve the noise reduction processing effect.

Referring to FIG. 8 , FIG. 8 shows a schematic flowchart of a noise reduction method for an audio playback device provided by still another embodiment of the present application. This method is applied to the above-mentioned audio playback device. In this embodiment, the audio playback device includes a Bluetooth module. The flow shown in FIG. 8 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following: step:

Step S310: When a Bluetooth signal is transmitted based on the Bluetooth module, monitor the transmission signal of the Bluetooth module.

In some embodiments, the audio playback device includes a Bluetooth module, the audio providing device includes a Bluetooth module, and the audio playback device can transmit a Bluetooth signal to the Bluetooth module included in the audio providing device through the included Bluetooth module, thereby realizing the audio playback device and the audio providing device. Bluetooth communication between devices. In this embodiment, when the audio playback device transmits a Bluetooth signal to the audio providing device based on the Bluetooth module, it can monitor the transmission signal of the Bluetooth module, wherein the transmission signal of the Bluetooth module may include the transmission frequency of the Bluetooth module and the transmission power of the Bluetooth module. etc., which are not limited here.

Step S320: Obtain the target noise signal based on the transmitted signal.

In this embodiment, after the transmission signal of the Bluetooth module is acquired, the target noise signal can be acquired based on the transmission signal. As a method, the waveform phase of the target noise signal and the transmission signal are in a corresponding relationship. The target noise signal may be obtained based on the correspondence between the target noise signal and the transmitted signal.

In some embodiments, the audio playback device may create a mapping relationship table, and the mapping relationship table may include multiple transmission signals, multiple target noise signals, and the corresponding relationship between multiple transmission signals and multiple target noise signals, for example, all Described mapping relation table can be as shown in table 1, wherein, transmit signal is represented by A, target noise signal is represented by B, then, through described mapping relation table, this audio playback device can correspondingly set the correspondence of transmit signal and target noise signal relationship and stored locally on the audio playback device. Of course, in some embodiments, the mapping relationship table can also be created by other devices and sent to the audio playback device for local storage in the audio playback device. For example, the mapping relationship table can also be created by the audio playback device and sent to the audio playback device. Audio playback device.

Table 1

发射信号Atransmit signal A	目标噪声信号Btarget noise signal B
A1A1	B1B1
A2A2	B2B2
A3A3	B3B3
A4A4	B4B4

In some embodiments, after acquiring the transmission signal of the Bluetooth module, the audio playback device can look up the transmission signal matching the transmission signal of the Bluetooth module from the mapping relationship table as the target transmission signal, and then based on the transmission signal in the mapping relationship table According to the corresponding relationship with the target noise signal, the target noise signal corresponding to the transmission signal matching the target transmission signal can be found. For example, when the transmission signal of the Bluetooth module is A1, it can be determined that the target noise signal is B1.

In some embodiments, the audio playback device includes a Bluetooth module, the audio providing device includes a Bluetooth module, and the audio playback device can transmit a Bluetooth signal to the Bluetooth module included in the audio providing device through the included Bluetooth module, thereby realizing the audio playback device and the audio providing device. Bluetooth communication between devices. In this embodiment, when the audio playback device transmits a Bluetooth signal to the audio providing device based on the Bluetooth module, it can monitor the transmission frequency of the Bluetooth module.

Among them, according to the Bluetooth communication protocol, in the process of Bluetooth communication, the Bluetooth module of the audio playback device will communicate with the Bluetooth module of other Bluetooth devices (such as audio providing devices) at regular intervals. For example, when the audio playback device and audio When the providing device is in the back-connected state, the audio playback device can transmit Bluetooth signals at a certain transmission frequency. For example, the audio providing device transmits Bluetooth signals at a transmission frequency of 1.25ms (Tx Slot is 0.625ms, Rx Slot is 0.625ms,). Therefore, in this embodiment, it can be considered that the audio playback device will generate the target noise signal at every interval of the transmission frequency, and the target noise signal can be obtained according to the transmission frequency.

In some embodiments, since the audio playback device is in the Bluetooth back-connection state, it first needs to transmit a Bluetooth signal, and then receive a signal fed back by the audio providing device, wherein the time of transmitting the Bluetooth signal is denoted as Tx Slot, and the time of receiving the signal is denoted as Rx Slot, the time of Tx Slot can be 0.625ms, the time of Rx Slot can be 0.625ms, then the period of Tx Slot+Rx Slot is 1.25ms, that is to say, the audio playback device transmits the Bluetooth signal at the transmission frequency of 1.25ms, Then 1.25ms can be recorded as the transmission frequency, and the target noise signal can be obtained according to the transmission frequency.

Referring to FIG. 9, FIG. 9 shows a schematic diagram of a current change of the audio playback device provided by the embodiment of the present application during communication. As shown in Figure 9, when the audio playback device transmits a Bluetooth signal, the current drawn from the power module increases at regular intervals, and the time interval between each adjacent two increased currents is basically the same, and the time interval can be regarded as The transmission frequency, therefore, the target noise signal can be obtained at this transmission frequency.

Step S330: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

Step S340: Play the inverted signal.

In a noise reduction method for an audio playback device provided by a further embodiment of the present application, when a Bluetooth signal is transmitted based on a Bluetooth module, the transmission signal of the Bluetooth module is monitored, a target noise signal is acquired based on the transmission signal, and an inverted signal is generated according to the target noise signal, Wherein, the waveform phase of the target noise signal is opposite to that of the inverted signal, and the inverted signal is played. Compared with the noise reduction method of the audio playback device shown in FIG. 3 , the present embodiment also obtains the target noise signal by monitoring the transmission signal of the Bluetooth module, so as to improve the efficiency and convenience of obtaining the noise signal.

Referring to FIG. 10, FIG. 10 shows a schematic flowchart of a noise reduction method for an audio playback device provided by another embodiment of the present application. This method is applied to the above-mentioned audio playback device, and the flow shown in FIG. 10 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following steps:

Step S410: Acquire a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device.

Step S420: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

Step S430: Play the inverted signal.

The specific description of steps S410-step S430 can refer to steps S110-step S130, which will not be repeated here.

Step S440: Play a prompt sound when the inverted signal does not cancel the target noise signal, wherein the prompt sound is used to cover the target noise signal.

In some embodiments, after playing the inverted signal, it can be detected whether the audio signal output by the audio playback device still includes the target noise signal, wherein when the detection result indicates that the audio signal output by the audio playback device still includes the target noise signal , indicating that the inverse signal does not cancel the target noise signal, you can play the prompt tone, and cover the target noise signal by the prompt tone, so that the user cannot hear the noise problem. When the detection result indicates that the audio signal output by the audio playback device does not include When the target noise signal is represented, the inverted signal can cancel the target noise signal, and the prompt tone may not be played.

Another embodiment of the present application provides a noise reduction method for an audio playback device, which acquires a target noise signal of the audio playback device, where the target noise signal is caused by Bluetooth communication performed by the audio playback device, and generates an inverted signal according to the target noise signal, wherein, The waveform phase of the target noise signal is opposite to that of the inverted signal, and the inverted signal is played. When the inverted signal does not cancel the target noise signal, a prompt tone for covering the target noise signal is played. Compared with the noise reduction method of the audio playback device shown in FIG. 3 , the present embodiment also plays a prompt sound to cover the target noise signal when the inverted signal does not cancel the target noise signal, so as to improve the noise reduction effect of the audio playback device.

Please refer to FIG. 11. FIG. 11 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application. This method is applied to the above-mentioned audio playback device. In this embodiment, the audio playback device is a Bluetooth headset. The flow shown in FIG. 11 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following: step:

Step S510: Acquire a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device.

Step S520: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

The specific description of steps S510-step S520 can refer to steps S110-step S120, which will not be repeated here.

Step S530: Detect the wearing state of the Bluetooth headset.

In this embodiment, the audio playback device is a Bluetooth headset, and the Bluetooth headset may include a first Bluetooth headset and a second Bluetooth headset.

In some embodiments, it can be detected whether the first Bluetooth headset is in a wearing state and whether the second Bluetooth headset is in a wearing state. Wherein, whether the first Bluetooth headset is in the wearing state can be determined by detecting whether the first Bluetooth headset is placed on the user's ear. It is understandable that when the first Bluetooth headset is placed on the user's ear, it is determined that the first Bluetooth headset is In the wearing state, when the first Bluetooth headset is not placed on the user's ear, it is determined that the first Bluetooth headset is in the non-wearing state. Similarly, it can be determined whether the second Bluetooth headset is in the wearing state by detecting whether the second Bluetooth headset is placed on the user's ear. It is understandable that when the second Bluetooth headset is placed on the user's ear, the second Bluetooth headset is determined In the wearing state, when the second Bluetooth headset is not placed on the user's ear, it is determined that the second Bluetooth headset is in the non-wearing state.

For example, when both the first Bluetooth headset and the second Bluetooth headset are in the wearing state, it may include that the first Bluetooth headset is worn on the user's left ear and the second Bluetooth headset is worn on the user's right ear, or the first Bluetooth headset is worn on the user's right ear And the first bluetooth earphone is worn on the user's left ear; when only one of the first bluetooth earphone and the second bluetooth earphone is in a wearing state, it may include that the first bluetooth earphone is worn on the user's left ear and the second bluetooth earphone is in a non-wearing state, The first Bluetooth headset is worn on the user's right ear and the second Bluetooth headset is in a non-wearing state, the second Bluetooth headset is worn on the user's right ear and the first Bluetooth headset is in a non-wearing state, and the second Bluetooth headset is worn on the user's left ear and the first Bluetooth headset is in a non-wearing state. The Bluetooth headset is in the non-wearing state; when both the first Bluetooth headset and the second Bluetooth headset are in the non-wearing state, it means that neither the first Bluetooth headset nor the second Bluetooth headset is placed in the user's ear, which will not be repeated here.

In one way, the first Bluetooth headset may include a first headset body and a first contact sensor disposed on the first headset body, wherein the first contact sensor may be disposed on the outer surface of the first headset body, and when the first When the Bluetooth headset is placed on the user's ear, the first contact sensor contacts the user's ear to generate a first contact signal. Therefore, it can be determined whether the first Bluetooth headset is placed in the user's ear through the first contact parameter detected by the first contact sensor. User ear, wherein the first contact parameter may include contact area and/or contact point.

In one way, the second Bluetooth headset includes a second headset body and a second contact sensor disposed on the second headset body, wherein the second contact sensor can be disposed on the outer surface of the second headset body, when the second Bluetooth headset When the headset is placed on the user's ear, the second contact sensor contacts the user's ear to generate a second contact signal. Therefore, it can be determined whether the second Bluetooth headset is placed on the user's ear through the second contact parameter detected by the second contact sensor. ear, wherein the second contact parameter can also include contact area and/or contact point.

As another way, the attitude data of the first Bluetooth headset may be detected, and the attitude data of the second Bluetooth headset may be detected. Specifically, the first Bluetooth headset may further include a first acceleration sensor and/or a first A gyroscope, the first acceleration sensor and/or the first gyroscope are arranged in the first earphone body, and are used to detect the attitude data of the first Bluetooth earphone. Similarly, the second Bluetooth headset may also include a second acceleration sensor and/or a second gyroscope, and the second acceleration sensor and/or the second gyroscope are arranged in the second headset body for detecting the second Bluetooth headset The pose data will be the detected pose data.

As a way, the electronic device pre-stores attitude data when the Bluetooth headset is placed on the user's ear, wherein the attitude data is configured as preset attitude data, which is used as the detected attitude data of the first Bluetooth headset and the first Bluetooth headset. The judgment basis of the attitude data of the second Bluetooth headset, it can be understood that after detecting the first attitude data of the first Bluetooth headset, the first attitude data is compared with the preset attitude data to determine whether the first attitude data is It is consistent with the preset attitude data or within the allowable error range of the preset attitude data, wherein, when the first attitude data is consistent with the preset attitude data or within the allowable error range of the preset attitude data, it can be determined that the first attitude data is consistent with the preset attitude data. The attitude data of the first Bluetooth headset satisfies the preset attitude data, then it is determined that the first Bluetooth headset is in the wearing state. When the first attitude data is inconsistent with the preset attitude data or is outside the allowable error range of the preset attitude data, then It can be determined that the attitude data of the first Bluetooth headset does not meet the preset attitude data, and it is determined that the first Bluetooth headset is in a non-wearing state.

Similarly, after the second attitude data of the second Bluetooth headset is detected, the second attitude data is compared with the preset attitude data to determine whether the second attitude data is consistent with the preset attitude data or is in the preset attitude data. Within the allowable error range, wherein, when the second attitude data is consistent with the preset attitude data or within the allowable error range of the preset attitude data, it can be determined that the attitude data of the second Bluetooth headset satisfies the preset attitude data , then it is determined that the second Bluetooth headset is in the wearing state. When the second attitude data is inconsistent with the preset attitude data or is outside the allowable error range of the preset attitude data, it can be determined that the attitude data of the second Bluetooth headset does not satisfy Presetting the posture data, it is determined that the second Bluetooth headset is in a non-wearing state.

Step S540: Play the inverted signal when the Bluetooth headset is in a wearing state.

In this embodiment, when it is detected that the Bluetooth headset is in a wearing state, it can be determined that the Bluetooth headset is in a use state, and an inverted signal can be played to offset the target noise signal to improve the user experience. When it is detected that the Bluetooth headset is not worn When it is in the state, it can be determined that the Bluetooth headset is in an unused state, and the inverted signal can not be played, thereby reducing the power consumption of the electronic device.

In some embodiments, when the Bluetooth headset is in the wearing state, it can be detected whether the Bluetooth headset is performing audio output, for example, it can be detected whether the Bluetooth headset is performing song output, whether it is performing voice output, whether it is performing audio clip output, etc., Among them, when it is detected that the Bluetooth headset is performing audio output, it can be considered that the audio output by the Bluetooth headset can cover or weaken the target noise signal, and the reverse signal can not be played. When it is detected that the Bluetooth headset is performing no audio output, it can be considered that If the influence of the target noise signal is greater, the inverted signal can be played to cancel the target noise signal.

In some embodiments, when it is detected that the first Bluetooth headset is in a wearing state and the second Bluetooth headset is in a wearing state, both the first Bluetooth headset and the second Bluetooth headset play an inverted signal; when it is detected that the first Bluetooth headset is in a wearing state When it is in the wearing state and the second Bluetooth headset is in the non-wearing state, the first Bluetooth headset plays the inverted signal and the second Bluetooth headset does not play the inverted signal; when it is detected that the first Bluetooth headset is in the non-wearing state and the second Bluetooth headset is in the In the wearing state, the first Bluetooth headset does not play the inverted signal and the second Bluetooth headset plays the inverted signal; when it is detected that the first Bluetooth headset is in the non-wearing state and the second Bluetooth headset is in the non-wearing state, the first Bluetooth headset is in the non-wearing state. Neither the earphone nor the second bluetooth earphone play the inverted signal.

Still another embodiment of the present application provides a noise reduction method for an audio playback device, which acquires a target noise signal of the audio playback device, where the target noise signal is caused by Bluetooth communication performed by the audio playback device, and generates an inverted signal according to the target noise signal, wherein , the waveform phase of the target noise signal is opposite to that of the inverted signal, and the wearing state of the Bluetooth headset is detected. When the Bluetooth headset is in the wearing state, the inverted signal is played. Compared with the noise reduction method of the audio playback device shown in FIG. 3 , the present embodiment also performs noise reduction processing on the target noise signal of the Bluetooth headset when the Bluetooth headset is in a wearing state, so as to reduce the power consumption of the Bluetooth headset.

Please refer to FIG. 12. FIG. 12 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application. This method is applied to the above-mentioned audio playback device. In this embodiment, the audio playback device is a Bluetooth headset. The flow shown in FIG. 12 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following: step:

Step S610: Collect multiple noise signals.

In some embodiments, the acquisition of the noise signal by the audio playback device may not be limited, that is, the audio playback device may simultaneously acquire the target noise signal generated based on the Bluetooth communication and the environmental noise signal of the environment in which it is located, so that the acquisition can obtain multiple noise signals.

Step S620: Obtain a noise signal belonging to a target frequency from the plurality of noise signals as the target noise signal.

Wherein, based on the characteristics of different frequencies of the environmental noise signal and the target noise signal generated based on the transmission of the Bluetooth signal, in this embodiment, a target frequency corresponding to the target noise signal generated based on the Bluetooth communication may be preset and stored, and the target frequency is used for As the judgment basis for the collected multiple noise signals. Therefore, in this embodiment, after collecting and obtaining multiple noise signals, the frequency of each noise signal in the multiple noise signals can be compared with the target frequency to determine whether the frequency of each noise signal matches the target frequency , according to the judgment result, the noise signal belonging to the target frequency can be obtained from the plurality of noise signals as the target noise signal.

Step S630: Generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

Step S640: Play the inverted signal.

Wherein, the specific description of steps S630-step S640 can refer to steps S120-step S130, and details are not repeated here.

Yet another embodiment of the present application provides a noise reduction method for an audio playback device, which collects multiple noise signals, acquires a noise signal belonging to a target frequency from the multiple noise signals, takes it as a target noise signal, and generates an inverted signal according to the target noise signal , where the target noise signal is opposite to the waveform phase of the inverted signal, and the inverted signal is played. Compared with the noise reduction method of the audio playback device shown in FIG. 3 , the present embodiment also filters the collected noise signals by frequency to obtain the target noise signal generated based on the Bluetooth communication, and performs targeted noise reduction processing. .

Please refer to FIG. 13. FIG. 13 shows a schematic flowchart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application. The noise reduction method of the audio playback device is used for reducing the influence of the target noise signal by playing an inverse signal whose waveform phase is opposite to that of the noise signal of the target frequency, and realizes the small size design of the audio playback device and improves the usage of the user. experience. In a specific embodiment, the noise reduction method of the audio playback device is applied to the noise reduction device 400 of the audio playback device shown in FIG. 16 and the electronic device 100 configured with the noise reduction device 400 of the audio playback device (FIG. 2 ). The following will take an audio playback device as an example to describe the specific process of this embodiment. Of course, it can be understood that the electronic device applied in this embodiment may be an audio playback device based on Bluetooth communication technology, such as a Bluetooth headset and a Bluetooth speaker. Not limited. The flow shown in FIG. 13 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following steps:

Step S710: Acquire a noise signal of a target frequency, wherein the target frequency is the same as the frequency of the current acoustic signal caused by the Bluetooth communication performed by the audio playback device or the frequency difference is within a preset range.

Among them, when the Bluetooth function of the audio playback device is turned on, the audio playback device may cause the battery and/or the inductor to generate an equivalent electric field due to the emission of the Bluetooth signal, thereby interfering with the components of the audio playback device, such as the speaker and other sensitive devices, thereby generating a current sound signal, At this time, the electronic device generates a noise signal correspondingly, wherein the frequency of the generated noise signal is recorded as the target frequency, then the target frequency is the same as the frequency of the current acoustic signal, or the target frequency and the frequency difference of the current acoustic signal are at A preset range (eg, the target frequency is approximately the same as the frequency of the current acoustic signal). For example, the target frequency is 800 Hz or a harmonic of 800 Hz. Therefore, in this embodiment, in order to perform noise reduction processing on the generated noise signal, a noise signal with a target frequency may be obtained, for example, a noise signal with a frequency of 800 Hz or a harmonic of 800 Hz may be obtained.

It can be understood that the audio playback device has the ability to collect noise signals at the target frequency. The audio playback device may cause the battery and/or inductor to generate an equivalent electric field due to the emission of Bluetooth signals, thereby interfering with the components of the audio playback device, such as speakers and other sensitive devices. The current acoustic signal is generated. In this case, the frequency of the generated current acoustic signal is different from that of ordinary environmental noise. Therefore, the characteristics of the noise signal to be collected can be determined according to the characteristics of the frequency of the above current acoustic signal, such as frequency characteristics, Then, the noise signal is collected according to the above-mentioned characteristics, and the purpose of reducing or eliminating the current acoustic signal is achieved through the reverse signal, such as playing the reverse phase signal.

Therefore, in this embodiment, the audio playback device can use the target frequency as a judgment basis for the collected sound in the environment where it is located. As a way, when the audio playback device collects the noise signal through the microphone, it can collect the noise signal matching the target frequency, so that the obtained noise signal includes the noise signal of the target frequency.

Step S720: Generate an inverted signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is opposite to the waveform of the inverted signal.

In this embodiment, after acquiring the noise signal of the target frequency, an inversion signal may be generated according to the noise signal of the target frequency, wherein the generated inversion signal is opposite to the waveform of the noise signal of the target frequency. In some embodiments, after acquiring the noise signal of the target frequency, a spectrum of the noise signal of the target frequency can be calculated, and based on the spectrum of the noise signal of the target frequency, an inverted signal with opposite phases and the same amplitude is generated.

Step S730: Play the inverted signal.

In this embodiment, after the inverted signal is acquired, the inverted signal can be played. Since the waveforms of the inverted signal and the noise signal of the target frequency are in opposite phases, playing the inverted signal can cancel the noise signal of the target frequency. Thereby, the influence of the noise signal of the target frequency can be reduced. In addition, since the noise signal of the target frequency is canceled by the inverted signal in this embodiment, it is not necessary to increase the distance between the electronic components, and the small size design of the audio playback device can be realized.

Still another embodiment of the present application provides a noise reduction method for an audio playback device, which acquires a noise signal of a target frequency, wherein the target frequency and the current sound signal caused by Bluetooth communication with the audio playback device have the same frequency or a frequency difference in a predetermined frequency. Set the range (for example, the target frequency is close to the same frequency as the current acoustic signal), generate an inverted signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is opposite to the waveform phase of the inverted signal, and play the inverted signal , so as to reduce the influence of the target noise signal by playing the opposite phase signal with the waveform phase of the noise signal of the target frequency, and realize the small size design of the audio playback device and improve the user experience.

Please refer to FIG. 14. FIG. 14 shows a schematic flowchart of an audio playback device provided by yet another embodiment of the present application. This method is applied to the above-mentioned audio playback device. The flow shown in FIG. 14 will be described in detail below. The noise reduction method of the audio playback device may specifically include the following steps:

Step S810: During part or all of the Bluetooth communication, acquire the noise signal of the target frequency, wherein the target frequency is the same as the frequency of the current sound signal caused by the Bluetooth communication performed by the audio playback device or the frequency difference is in the range of Preset range.

In some implementations, the audio playback device will generate a current sound of a specific frequency during part or all of the Bluetooth communication, that is, during part or all of the Bluetooth communication, the audio playback device will generate a noise signal of the target frequency . Therefore, in this embodiment, the noise signal of the target frequency can be acquired in part or all of the process of the Bluetooth communication, and noise reduction processing is performed on the noise signal of the target frequency, so as to improve the noise reduction processing effect.

In some embodiments, during the process of establishing the Bluetooth connection, the current sound is more prominent in the audio playback device, that is, during part or all of the process of establishing the Bluetooth connection, the audio playback device generates a noise signal of the target frequency situation is more obvious. Therefore, in this embodiment, during part or all of the process of establishing the Bluetooth connection, the noise signal of the target frequency is acquired, and noise reduction processing is performed on the noise signal of the target frequency, so as to improve the noise reduction processing effect.

In some embodiments, the fluctuation of the output current of the power supply will increase when in the paging or query state, which may cause electronic devices such as batteries and inductors to generate a large electromagnetic field, thereby interfering with sensitive devices such as speakers to generate current sound. Equal noise, that is, the case of a noise signal of a target frequency generated by an audio playback device during part or all of a Bluetooth paging or Bluetooth inquiry is more pronounced. Therefore, in this embodiment, in part or all of the process of Bluetooth paging or Bluetooth query, the noise signal of the target frequency is acquired, and noise reduction processing is performed on the noise signal of the target frequency to improve the noise reduction processing effect.

In some embodiments, when the audio playback device transmits a Bluetooth signal, the power consumption of the entire system of the audio playback device will be very large, so the current drawn from the power supply module will also be relatively large, then, when the current is large, it flows through the audio module The electromagnetic field of the coil (such as a speaker) will also be relatively large, that is, the noise signal will be relatively large, that is, during part or all of the process of transmitting the Bluetooth signal by the audio playback device, the noise signal of the target frequency generated by the audio playback device is more obvious. . Therefore, in this embodiment, during part or all of the process of transmitting the Bluetooth signal by the audio playback device, the noise signal of the target frequency is obtained, and the noise signal of the target frequency is subjected to noise reduction processing to improve the noise reduction processing effect.

Step S820: Generate an inverted signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is opposite to the waveform of the inverted signal.

Step S830: Play the inverted signal.

The specific description of steps S820 to S830 may refer to steps S720 to S730, which will not be repeated here.

Still another embodiment of the present application provides a noise reduction method for an audio playback device. During part or all of the Bluetooth communication process, a noise signal of a target frequency is acquired, wherein the current acoustic signal caused by the Bluetooth communication between the target frequency and the audio playback device The frequency of the target frequency is the same or the frequency difference value is in a preset range (for example, the target frequency and the frequency of the current acoustic signal are close to the same), and an inverted signal is generated according to the noise signal of the target frequency, wherein the noise signal of the target frequency and the waveform of the inverted signal are Opposite phase, playing the inverted signal. Compared with the noise reduction method of the audio playback device shown in FIG. 10 , the present embodiment also acquires the noise signal of the target frequency during part or all of the Bluetooth communication process, and plays an inverse phase opposite to the waveform of the noise signal of the target frequency. phase signal to reduce the influence of the target noise signal and improve the noise reduction processing effect.

Please refer to FIG. 15. FIG. 15 shows a block diagram of a module of a noise reduction apparatus of an audio playback device provided by an embodiment of the present application. The noise reduction device 300 of the audio playback device is applied to the above audio playback device, and the block diagram shown in FIG. 15 will be described below. The noise reduction device 300 of the audio playback device includes: a target noise signal acquisition module 310, an inverted signal The generating module 320 and the inverted signal playing module 330, wherein:

A target noise signal acquisition module 310 is configured to acquire a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device.

Further, the target noise signal acquisition module 310 includes: a first target noise signal acquisition sub-module, wherein:

The first target noise signal acquisition sub-module is configured to acquire the target noise signal in part or all of the Bluetooth communication process.

Further, the first target noise signal acquisition sub-module includes: a current acoustic signal acquisition unit and a first target noise signal acquisition unit, wherein:

The current-acoustic signal acquisition unit is used for acquiring the current-acoustic signal in part or the whole process of the Bluetooth communication.

Further, the audio playback device includes a power supply module and an audio module, and the current-acoustic signal acquisition unit includes: a current-acoustic signal acquisition subunit, wherein:

The current-acoustic signal acquisition subunit is used for acquiring the current-acoustic signal generated by the audio module based on the current change of the power module during part or all of the Bluetooth communication process.

A first target noise signal acquisition unit, configured to determine the current acoustic signal as the target noise signal.

Further, the audio playback device includes a Bluetooth module, and the target noise signal acquisition module 310 includes: a transmission signal monitoring sub-module and a second target noise signal acquisition sub-module, wherein:

The transmission signal monitoring sub-module is used for monitoring the transmission signal of the Bluetooth module when the Bluetooth signal is transmitted based on the Bluetooth module.

The second target noise signal acquisition sub-module is configured to acquire the target noise signal based on the transmit signal.

Further, the transmission signal includes a transmission frequency, and the second target noise signal acquisition sub-module includes: a second target noise signal acquisition unit, wherein:

The second target noise signal obtaining unit is configured to obtain the target noise signal according to the transmission frequency.

Further, the target noise signal acquisition module 310 includes: a noise signal acquisition sub-module and a third target noise signal acquisition sub-module, wherein:

The noise signal acquisition sub-module is used to collect multiple noise signals.

A third target noise signal acquisition sub-module, configured to acquire a noise signal belonging to a target frequency from the plurality of noise signals as the target noise signal

The inverted signal generating module 320 is configured to generate an inverted signal according to the target noise signal, wherein the target noise signal and the waveform of the inverted signal have opposite phases.

The inverted signal playing module 330 is used for playing the inverted signal.

Further, the inverting signal playing module 330 includes: a wearing state detection sub-module and an inverting signal playing sub-module, wherein:

The wearing state detection sub-module is used to detect the wearing state of the Bluetooth headset.

The inverted signal playing sub-module is used for playing the inverted signal when the Bluetooth headset is in a wearing state.

Further, the inverting signal playing sub-module includes: an inverting signal playing unit, wherein:

A reversed-phase signal playing unit, configured to play the reversed-phase signal when the Bluetooth headset is worn and in a mute state.

Further, the noise reduction device 300 of the audio playback device further includes: a prompt sound playback module, wherein:

A prompt sound playing module, configured to play a prompt sound when the inversion signal does not cancel the target noise signal, wherein the prompt sound is used to cover the target noise signal.

Referring to FIG. 16, FIG. 16 shows a block diagram of a module of a noise reduction apparatus of an audio playback device provided by yet another embodiment of the present application. The noise reduction device 400 of the audio playback device is applied to the above-mentioned audio playback device. The block diagram shown in FIG. 16 will be described below. The noise reduction device 400 of the audio playback device includes: a noise signal acquisition module 410, an inverted signal generation The module 420 and the inverted signal playing module 430, wherein:

The noise signal obtaining module 410 is configured to obtain a noise signal of a target frequency, wherein the target frequency is the same as the frequency of the current acoustic signal caused by the Bluetooth communication of the audio playback device or the frequency difference is within a preset range.

Further, the noise signal acquisition module 410 includes: a noise signal acquisition sub-module, wherein:

The noise signal acquisition sub-module is used for acquiring the noise signal of the target frequency in part or all of the Bluetooth communication process.

The inverted signal generating module 420 is configured to generate an inverted signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is opposite to the waveform of the inverted signal.

The inverted signal playing module 430 is used for playing the inverted signal.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described devices and modules, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In several embodiments provided in this application, the coupling between the modules may be electrical, mechanical or other forms of coupling.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

Please refer to FIG. 17 , which shows a structural block diagram of a computer-readable storage medium provided by an embodiment of the present application. The computer-readable medium 500 stores program codes, and the program codes can be invoked by the processor to execute the methods described in the above method embodiments.

The computer-readable storage medium 500 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 500 includes a non-transitory computer-readable storage medium. Computer readable storage medium 500 has storage space for program code 510 to perform any of the method steps in the above-described methods. These program codes can be read from or written to one or more computer program products. Program code 510 may be compressed, for example, in a suitable form.

To sum up, the noise reduction method, device, electronic device, and storage medium of an audio playback device provided in the embodiments of the present application obtain a target noise signal of the audio playback device, wherein the target noise signal is caused by the Bluetooth communication performed by the audio playback device, An inverted signal is generated according to the target noise signal, wherein the target noise signal is opposite to the waveform phase of the inverted signal, and the inverted signal is played, so as to reduce the The impact of the target noise signal, and realize the small size design of the audio playback device, improve the user experience.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A noise reduction method for audio playback equipment, characterized in that, applied to audio playback equipment, the method comprises:

acquiring a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device;

generating an inverted signal according to the target noise signal, wherein the target noise signal is opposite to the waveform phase of the inverted signal;

The inverted signal is played.
The method according to claim 1, wherein the acquiring the target noise signal of the audio playback device comprises:

The target noise signal is acquired during part or all of the Bluetooth communication.
The method according to claim 2, wherein the part or all of the process of Bluetooth communication comprises: part or all of the process of establishing a Bluetooth connection.
The method according to claim 2, wherein the part or the whole process of the Bluetooth communication comprises: the process of transmitting the Bluetooth signal by the audio playback device.
The method according to claim 2, wherein the part or the whole process of the Bluetooth communication comprises: part or the whole process of the Bluetooth paging or the Bluetooth query.
The method according to claim 2, wherein the acquiring the target noise signal during part or all of the Bluetooth communication comprises:

Acquiring current acoustic signals during part or all of the Bluetooth communication;

The current acoustic signal is determined as the target noise signal.
The method according to claim 6, wherein the audio playback device comprises a power supply module and an audio module, and in part or all of the bluetooth communication, acquiring the current acoustic signal comprises:

During part or all of the Bluetooth communication process, the current acoustic signal generated by the audio module based on the current change of the power module is acquired.
The method according to claim 1, wherein the audio playback device comprises a Bluetooth module, and the acquiring the target noise signal of the audio playback device comprises:

When transmitting a Bluetooth signal based on the Bluetooth module, monitor the transmission signal of the Bluetooth module;

Based on the transmit signal, the target noise signal is acquired.
The method according to claim 8, wherein the transmission signal includes a transmission frequency, and the acquiring the target noise signal based on the transmission signal comprises:

According to the transmission frequency, the target noise signal is acquired.
The method according to claim 1, wherein after the playing the inverted signal, the method further comprises:

When the inverted signal does not cancel the target noise signal, a prompt tone is played, wherein the prompt tone is used to cover the target noise signal.
The method according to any one of claims 1-10, wherein when the audio playback device is a Bluetooth headset, the playing the inverted signal comprises:

detecting the wearing state of the bluetooth headset;

When the Bluetooth headset is in a wearing state, the inverted signal is played.
The method according to claim 11, wherein the acquiring the target noise signal when the Bluetooth headset is in a wearing state comprises:

When the bluetooth headset is worn and muted, the inverted signal is played.
The method according to any one of claims 1-10, wherein the acquiring the target noise signal of the audio playback device comprises:

Collect multiple noise signals;

A noise signal belonging to a target frequency is obtained from the plurality of noise signals as the target noise signal.
A noise reduction method for audio playback equipment, characterized in that, applied to audio playback equipment, the method comprises:

Acquiring a noise signal of a target frequency, wherein the target frequency is the same as the frequency of the current acoustic signal caused by the Bluetooth communication performed by the audio playback device or the frequency difference is within a preset range;

generating an inverted signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is in opposite phase to the waveform of the inverted signal;

The inverted signal is played.
The method according to claim 14, wherein the acquiring the noise signal of the target frequency comprises:

During part or all of the Bluetooth communication, the noise signal of the target frequency is acquired.
The method according to claim 15, wherein the part or all of the process of Bluetooth communication comprises: part or all of the process of establishing a Bluetooth connection.
The method according to claim 15, wherein the part or the whole process of the Bluetooth communication comprises: a process in which the audio playback device transmits a Bluetooth signal.
The method according to claim 15, wherein the performing part or all of the process of Bluetooth communication comprises: part or all of the process of Bluetooth paging or Bluetooth inquiry.
The method according to claim 14, wherein the target frequency is 800 Hz, or a harmonic of 800 Hz.
A noise reduction device for audio playback equipment, characterized in that, applied to audio playback equipment, the device comprises:

a target noise signal acquisition module, configured to acquire a target noise signal of the audio playback device, wherein the target noise signal is caused by Bluetooth communication performed by the audio playback device;

an inversion signal generating module, configured to generate an inversion signal according to the target noise signal, wherein the target noise signal is opposite to the waveform phase of the inversion signal;

The inverted signal playing module is used for playing the inverted signal.
A noise reduction device for audio playback equipment, characterized in that, applied to audio playback equipment, the device comprises:

A noise signal acquisition module, configured to acquire a noise signal of a target frequency, wherein the target frequency is the same as the frequency of the current acoustic signal caused by the Bluetooth communication of the audio playback device or the frequency difference is within a preset range;

an inversion signal generation module, configured to generate an inversion signal according to the noise signal of the target frequency, wherein the noise signal of the target frequency is opposite to the waveform phase of the inversion signal;

The inverted signal playing module is used for playing the inverted signal.
An electronic device comprising a memory and a processor, the memory being coupled to the processor, the memory storing instructions that, when the instructions are executed by the processor, the processor executes as claimed in the claims The method of any of claims 1-13 or any of claims 14-19.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores program codes, and the program codes can be invoked by a processor to execute any one of claims 1-13 or as claimed in claims The method of any one of 14-19.