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

Abstract

The present application discloses a noise reduction method, device, electronic device and storage medium for an audio playback device, and relates to the technical field of electronic devices. According to a preset inverted signal, noise reduction processing is performed on a noise signal to be processed of the audio playback device, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device. The present application performs noise reduction processing on the noise signal of the audio playback device by presetting an inverted signal that is opposite in phase to the noise signal to be processed of the audio playback device, thereby improving the noise reduction processing effect, realizing a small-volume design of the audio playback device, and improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and more specifically, to a noise reduction method and device for an audio playback device, an electronic device, and a storage medium. Background Art

[0002] With the development of science and technology, audio playback devices are used more and more widely, with more and more functions, and have become one of the necessities in people's daily life. However, during the use of audio playback devices, noise is often accompanied, resulting in poor user experience. Summary of the invention

[0003] In view of the above problems, the present application proposes a noise reduction method, device, electronic device and storage medium for an audio playback device to solve the above problems.

[0004] 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, and the method includes: performing noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal; the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device.

[0005] In a second 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, and the method includes: playing an inverted sound wave of a preset frequency; the inverted sound wave of the preset frequency is opposite in phase to a noise signal to be processed by the audio playback device and the spectrum difference is within a preset range.

[0006] 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, and the device includes: a noise reduction processing module, which is used to perform noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal; the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device.

[0007] 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, and the device includes: an inverted sound wave playback module, which is used to play an inverted sound wave of a preset frequency; the inverted sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playback device and the spectrum difference is within a preset range.

[0008] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising a memory and a processor, wherein the memory is coupled to the processor, the memory stores instructions, and when the instructions are executed by the processor, the processor executes the above method.

[0009] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program code is stored, and the program code can be called by a processor to execute the above method.

[0010] The noise reduction method, device, electronic device and storage medium for an audio playback device provided in the embodiments of the present application perform noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device, thereby performing noise reduction processing on the noise signal of the audio playback device by using a preset inverted signal that is opposite in phase to the noise signal to be processed of the audio playback device, thereby improving the noise reduction processing effect, realizing a small volume design of the audio playback device, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 A schematic diagram showing an application environment of the noise reduction method for an audio playback device provided in an embodiment of the present application is shown;

[0013] Figure 2 A block diagram of an electronic device according to an embodiment of the present application for executing a noise reduction method for an audio playback device according to an embodiment of the present application is shown;

[0014] Figure 3 A schematic diagram showing a flow chart of a noise reduction method for an audio playback device provided by an embodiment of the present application;

[0015] Figure 4 shows a spectrum diagram of a noise signal to be processed provided by an embodiment of the present application;

[0016] Figure 5 shows a frequency spectrum diagram of a preset inverted signal provided in an embodiment of the present application;

[0017] Figure 6 A schematic flow chart of a noise reduction method for an audio playback device provided in another embodiment of the present application is shown;

[0018] Figure 7 A schematic diagram showing a flow chart of a noise reduction method for an audio playback device provided in yet another embodiment of the present application;

[0019] Figure 8A schematic diagram showing current changes of an audio playback device provided in an embodiment of the present application during communication is shown;

[0020] Fig. 9 A schematic diagram showing a flow chart of a noise reduction method for an audio playback device provided in another embodiment of the present application is shown;

[0021] Fig.10 A schematic flow chart of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown;

[0022] Fig.11 A schematic flow chart of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown;

[0023] Fig.12 A schematic flow chart of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown;

[0024] Fig.13 A schematic flow chart of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown;

[0025] Fig.14 A module block diagram of a noise reduction device for an audio playback device provided by an embodiment of the present application is shown;

[0026] Fig.15 A module block diagram of a noise reduction device for an audio playback device provided in another embodiment of the present application is shown;

[0027] Fig.16 A storage unit for storing or carrying a program code for implementing a noise reduction method for an audio playback device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] With the development of science and technology, audio playback devices are used more and more widely and have more and more functions. They have become one of the necessities in people's daily life. However, noise can often be heard during the use of audio playback devices. This noise is generally called background noise. The background noise mainly includes two categories: one is current noise, and the source of this current noise is mainly caused by the interference of electronic components on the speaker. Electronic components can include power inductors, batteries, for example, the source of current noise can be caused by the interference of batteries on the speaker; the other is white noise, which is mainly related to the chip itself.

[0030] At present, the reduction of background noise 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. After the distance between the battery and the speaker is increased, the interference of the power radiated by the battery on the speaker is reduced, so the noise generated will be reduced. However, for audio playback devices with relatively small volume, due to space limitations, the speaker cannot be far away from the battery, and the radiation from the battery will still interfere with the speaker. Therefore, the noise of the audio playback device cannot be reduced well. In order to keep the battery away from the speaker, the distance between the two is increased, which will cause the volume of the audio playback device to be too large, affecting the aesthetics and user experience of the audio playback device.

[0031] In view of the above problems, the inventors have discovered after long-term research and proposed the noise reduction method, device, electronic device and storage medium of the audio playback device provided in the embodiments of the present application. The noise signal of the audio playback device is subjected to noise reduction processing by pre-setting an anti-phase signal with a phase opposite to the noise signal to be processed of the audio playback device, thereby improving the noise reduction processing effect, realizing a small volume design of the audio playback device, and improving the user experience. Among them, the specific noise reduction method of the audio playback device is described in detail in the subsequent embodiments.

[0032] The following describes the application environment of the noise reduction method for the audio playback device provided in the embodiment of the present application.

[0033] See also Figure 1 , Figure 1 A schematic diagram of an application environment of the noise reduction method for an audio playback device provided in an embodiment of the present application is shown. Figure 1 As shown, 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 are not limited here. 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 with audio providing functions, which are not limited here. In this application scenario, the audio providing device 200 can be used as an audio providing device to send audio content to the audio playback device 100 for playback.

[0034] In some embodiments, the audio playback device 100 and the audio providing device 200 can communicate to complete data interaction. Among them, the audio playback device 100 and the audio providing device 200 can communicate through a local area network (LAN), or can communicate with each other through a wide area network (WAN). For example, the audio playback device 100 and the audio providing device 200 can be connected to a router at the same time, and the audio playback device 100 and the audio providing device 200 can communicate through the local area network provided by the router; for another example, the audio playback device 100 and the audio providing device 200 can communicate with the cloud, and realize 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 (i.e., a P2P network connection) through communication methods such as Bluetooth, Zigbee, and WebRTC, and communicate through the established network connection. Of course, the communication method between the audio playback device 100 and the audio providing device 200 can be unlimited.

[0035] In this embodiment, the audio playback device 100 communicates with the audio providing device 200 via Bluetooth. Figure 1 As shown, the audio playback device 100 can be a true wireless stereo (TWS) headset, the audio providing device 200 can be a smart phone, the audio playback device 100 and the audio providing device 200 communicate via Bluetooth, and the TWS headset can obtain and play audio data from the smart phone via Bluetooth technology.

[0036] See also Figure 2 , Figure 2 The module block diagram of the audio playback device 100 provided in the embodiment of the present application is shown. The audio playback device 100 can be an audio playback device with Bluetooth communication technology such as a Bluetooth headset, a Bluetooth speaker, etc. 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 may be stored in the memory 120 and configured to be executed by one or more processors 110, and one or more programs are configured to execute the method described in the aforementioned method embodiment.

[0037] As a 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 controlling 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 communication between the left and right headsets. The power module 140 is used to power each module in the audio playback device 100. The audio module 150 includes a speaker, a microphone, etc., which is used for audio playback and audio collection.

[0038] Among them, the processor 110 may include one or more processing cores. The processor 110 uses various interfaces and lines to connect various parts of the entire audio playback device 100, and executes various functions and processes data of the electronic device 100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 120, and calling data stored in the memory 120. Optionally, the processor 110 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 110 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed; and the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor 110, but implemented separately through a communication chip.

[0039] The memory 120 may include a random access memory (RAM) or a read-only memory (ROM). The memory 120 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 120 may include a program storage area and a data storage area, wherein the program storage 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 various method embodiments, etc. The data storage area may also store data (such as a phone book, audio and video data, chat record data) created by the audio playback device 100 during use.

[0040] The inventors have found that in some or all of the Bluetooth communication process, some audio playback devices will produce current sounds of specific frequencies. Further research has found that the current sounds are more prominent in the process of establishing a Bluetooth connection. Establishing a Bluetooth connection can be the first time to establish a connection with other Bluetooth devices, or it can be the re-establishment of a Bluetooth connection (reconnection) with a certain Bluetooth device, or it can be 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 state of paging page, paging scan page scan, inquiry, inquiry scan, etc., and may switch between different states. The inventors have found that, especially when in the paging or inquiry state, due to the need to send Bluetooth signals, such as ID packets, in each frequency band according to the Bluetooth frequency hopping protocol, and wait for feedback, the alternation of transmitting Bluetooth signals and not transmitting Bluetooth signals becomes more frequent, and the fluctuation of the power supply output current caused by this will increase, 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 noise such as current sounds. Taking the audio playback device as a Bluetooth headset as an example, if the Bluetooth connection is suddenly disconnected during user use, the main headset of the Bluetooth headset will enter the paging state and try to reconnect to the mobile phone. In the paging state, due to the frequent transmission of ID packets and waiting for feedback, the power output current changes greatly and frequently. The battery and power inductor may generate a large electromagnetic field, which in turn interferes with the speaker and produces current sound (noise signal to be processed).

[0041] See also Figure 3 , Figure 3A flow chart of a noise reduction method for an audio playback device provided by an embodiment of the present application is shown. The noise reduction method for an audio playback device is used to perform noise reduction processing on the noise signal of the audio playback device by pre-setting an anti-phase signal that is opposite in phase to the noise signal to be processed by the audio playback device, thereby improving the noise reduction processing effect, realizing a small-volume design of the audio playback device, and improving the user experience. In a specific embodiment, the noise reduction method for an audio playback device is applied to Fig.14 The noise reduction device 300 of the audio playback device and the audio playback device 100 ( Figure 2 ). The following will take an audio playback device as an example to illustrate the specific process of this embodiment. Of course, it can be understood that the audio playback device used in this embodiment can be an audio playback device based on Bluetooth communication technology such as a Bluetooth headset, a Bluetooth speaker, etc., which is not limited here. Figure 3 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0042] Step S110: performing noise reduction processing on the noise signal to be processed of the audio playback device according to a preset inverted signal, wherein the preset inverted signal has an opposite phase to the noise signal to be processed of the audio playback device.

[0043] Among them, when the Bluetooth function of the audio playback device is turned on, the audio playback device will generate a noise signal to be processed with a fixed frequency. For example, a noise signal to be processed with a frequency of 800HZ or a harmonic of 800HZ will be generated. Therefore, in this embodiment, in order to perform noise reduction processing on the noise signal to be processed of the audio playback device, an inverted signal with a phase opposite to the noise signal to be processed of the audio playback device can be pre-set as a preset inverted signal and stored locally in the audio playback device. For example, an inverted signal with a phase opposite to the harmonic of 800HZ or a frequency of 800HZ can be pre-set as a preset inverted signal. During the use of the audio playback device, the noise signal to be processed of the audio playback device can be subjected to noise reduction processing according to the preset inverted signal.

[0044] In some embodiments, the preset inverted signal may have the same frequency spectrum as the noise signal to be processed, or the frequency spectrum difference between the preset inverted signal and the noise signal to be processed may be within a preset range to improve the effect of noise reduction processing by the preset inverted signal.

[0045] See also Figure 4 and Figure 5 ,in, Figure 4 shows a spectrum diagram of a noise signal to be processed provided by an embodiment of the present application, Figure 5 The frequency spectrum of the preset inverted signal provided in the embodiment of the present application is shown in FIG. Figure 4 and Figure 5 As shown, the phases of the noise signal to be processed and the preset inverted signal are opposite, and the frequency spectra are the same.

[0046] In some embodiments, the audio playback device may be a TWS headset, wherein two metal pins are provided at the bottom of the TWS headset, and when the TWS headset is placed in a charging box, the circuit between the TWS headset and the charging box is turned on, so that the charging box is used to charge the TWS headset. Among them, a common TWS headset has two metal pins or three metal pins, which are located at corresponding positions of the TWS headset and the charging box, respectively. When the TWS headset is placed in the charging box, the metal pins on the TWS headset and the metal pins on the charging box just touch each other to charge and place the TWS headset. In addition, when the TWS headset is taken out of the charging box, the TWS headset can automatically turn on and try to transmit a Bluetooth signal to the audio provider to try to establish a Bluetooth connection with the audio provider. Based on this, it is possible to detect whether the TWS earphones are taken out of the charging box. When it is detected that the TWS earphones are taken out of the charging box, it indicates that the Bluetooth function of the TWS earphones is turned on, and the noise signal to be processed by the audio playback device can be noise reduced according to the preset inverted signal. When it is detected that the TWS earphones are placed in the charging box, it indicates that the Bluetooth function of the TWS earphones is turned off, and the noise signal to be processed by the audio playback device may not be noise reduced according to the preset inverted signal.

[0047] 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 state information of the Bluetooth switch of the Bluetooth speaker may be detected, wherein when the state information of the Bluetooth switch of the Bluetooth speaker is detected to be in an on state, it indicates that the Bluetooth function of the Bluetooth speaker is turned on, and the noise signal to be processed of the audio playback device may be subjected to noise reduction processing according to the preset inverted signal, and when the Bluetooth switch of the Bluetooth speaker is detected to be in an off state, it indicates that the Bluetooth function of the Bluetooth speaker is turned off, and the noise signal to be processed of the audio playback device may not be subjected to noise reduction processing according to the preset inverted signal.

[0048] In some embodiments, the preset inverted signal is obtained based on the current acoustic signal caused by the audio player or a prototype of the audio player transmitting a Bluetooth signal, and the parameters of the preset inverted signal are preset in the audio player. During the use of the audio player, the preset inverted signal can be determined based on the parameters of the locally stored preset inverted signal, and the noise signal to be processed by the audio player is subjected to noise reduction processing based on the preset inverted signal.

[0049] In some embodiments, the preset inverted signal can be obtained by testing and stored locally when the audio player device leaves the factory. Specifically, the preset inverted signal can be obtained and stored locally in the audio player device according to the current acoustic signal caused by the audio player device or the prototype of the audio player device transmitting the Bluetooth signal when the audio player device leaves the factory. In some embodiments, the preset inverted signal can be obtained by testing and stored locally during the use of the audio player device. Specifically, the preset inverted signal can be obtained and stored locally during the use of the audio player device according to the current acoustic signal caused by the audio player device or the prototype of the audio player device transmitting the Bluetooth signal. In some embodiments, the preset inverted signal can be obtained and stored locally during the use of the audio player device according to the preset period of testing. Specifically, the preset inverted signal can be obtained and stored locally during the use of the audio player device according to the current acoustic signal caused by the audio player device or the prototype of the audio player device transmitting the Bluetooth signal according to the preset period of testing.

[0050] In some embodiments, a current acoustic signal caused by the Bluetooth signal transmitted by the audio playback device or a prototype of the audio playback device can be obtained, a noise signal to be processed is determined based on the current acoustic signal, and the noise signal to be processed is stored locally as a preset noise signal to be processed. During the use of the audio playback device, a preset inverted signal with a phase opposite to the preset noise signal to be processed stored locally can be determined, and noise reduction processing can be performed on the noise signal to be processed of the audio playback device according to the preset inverted signal.

[0051] A noise reduction method for an audio playback device provided by an embodiment of the present application performs noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device, thereby performing noise reduction processing on the noise signal of the audio playback device by using a preset inverted signal that is opposite in phase to the noise signal to be processed of the audio playback device, thereby improving the noise reduction processing effect, realizing a small volume design of the audio playback device, and improving the user experience.

[0052] See also Figure 6 , Figure 6 A schematic diagram of a noise reduction method for an audio playback device according to another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. Figure 6 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0053] Step S210: During part or all of the Bluetooth communication process, noise reduction processing is performed on the noise signal to be processed of the audio playback device according to the preset inverted signal, wherein the preset inverted signal has an opposite phase to the noise signal to be processed of the audio playback device.

[0054] In some implementations, since the audio playback device may generate current sound of a specific frequency during part or all of the Bluetooth communication process, that is, the audio playback device may generate a noise signal to be processed during part or all of the Bluetooth communication process. Therefore, in this embodiment, the noise signal to be processed by the audio playback device may be subjected to noise reduction processing according to a preset inverted signal during part or all of the Bluetooth communication process to improve the noise reduction processing effect.

[0055] In some implementations, the current sound of the audio playback device is more prominent during the process of establishing the Bluetooth connection, that is, the noise signal to be processed generated by the audio playback device is more obvious during part or all of the process of establishing the Bluetooth connection. Therefore, in this embodiment, the noise signal to be processed by the audio playback device can be subjected to noise reduction processing according to the preset inverted signal during part or all of the process of establishing the Bluetooth connection, so as to improve the noise reduction processing effect.

[0056] In some embodiments, the fluctuation of the power supply output current will increase when in the paging or query state, which may cause the electronic devices such as batteries and inductors to generate a large electromagnetic field, thereby interfering with the current sound and other noises of sensitive devices such as speakers, that is, in part or all of the Bluetooth paging or Bluetooth query process, the situation of the noise signal to be processed generated by the audio playback device is more obvious. Therefore, in this embodiment, the noise signal to be processed by the audio playback device can be processed according to the preset inverted signal during part or all of the Bluetooth paging or Bluetooth query process to improve the noise reduction processing effect.

[0057] In some embodiments, when the audio player device transmits a Bluetooth signal, the power consumption of the entire system of the audio player 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) will also be relatively large, that is, the noise signal is relatively large, that is, in the partial or full process of the audio player device transmitting the Bluetooth signal, the situation of the noise signal to be processed generated by the audio player device is more obvious. Therefore, in this embodiment, in the partial or full process of the audio player device transmitting the Bluetooth signal, according to the preset inverted signal, the noise signal to be processed of the audio player device can be subjected to noise reduction processing to improve the noise reduction processing effect.

[0058] Another embodiment of the present application provides a noise reduction method for an audio playback device, which performs noise reduction processing on a noise signal to be processed by the audio playback device according to a preset inverted signal during part or all of the Bluetooth communication process, wherein the preset inverted signal is in opposite phase to the noise signal to be processed by the audio playback device. Figure 3 The noise reduction method for the audio playback device shown in the figure, in this embodiment, also performs noise reduction processing on the noise signal of the audio playback device during part or all of the Bluetooth communication process by pre-setting an anti-phase signal with a phase opposite to the noise signal to be processed of the audio playback device, so as to perform noise reduction processing on the audio playback device in a targeted manner and improve the noise processing effect.

[0059] See also Figure 7 , Figure 7 A schematic diagram of a noise reduction method for an audio playback device provided in another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. Figure 7 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0060] Step S310: performing noise reduction processing on the noise signal to be processed of the audio playback device according to the preset inverted signal at a preset time interval, wherein the preset inverted signal has an opposite phase to the noise signal to be processed of the audio playback device.

[0061] Among them, according to the Bluetooth communication protocol, the Bluetooth module of the audio playback device will communicate with the Bluetooth module of other Bluetooth devices (such as audio providing devices) once every period of time. For example, when the audio playback device and the audio providing device are in a back-connected state, the audio playback device can transmit Bluetooth signals at a certain time interval, such as the audio providing device transmits Bluetooth signals at a time interval 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 a noise signal to be processed at every preset time interval, and then the anti-phase signal can be automatically preset according to the preset time interval to perform noise reduction processing on the noise signal to be processed of the audio playback device to continuously weaken the influence of the noise signal to be processed.

[0062] In some embodiments, since the audio playback device is in the Bluetooth reconnection state, it is necessary to first transmit a Bluetooth signal and then receive a signal fed back by the audio providing device, wherein the time for transmitting the Bluetooth signal is recorded as Tx Slot, and the time for receiving the signal is recorded as Rx Slot. The time of Tx Slot can be 0.625ms, and the time of Rx Slot can be 0.625ms, then the period of TxSlot+Rx Slot is 1.25ms, that is, the audio playback device transmits the Bluetooth signal at a time interval of 1.25ms, then 1.25ms can be recorded as the preset time interval, and according to the preset time interval and according to the preset inverted signal, the noise signal to be processed of the audio playback device is subjected to noise reduction processing.

[0063] See also Figure 8 , Figure 8 FIG. 1 is a schematic diagram showing the current variation of the audio playback device provided by the embodiment of the present application during communication. Figure 8 As shown, 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 two adjacent current increases is basically the same. This time interval can be regarded as a preset time interval. Therefore, the noise signal to be processed by the audio playback device can be subjected to noise reduction processing according to a preset inverted signal at the preset time interval.

[0064] Another embodiment of the present application provides a noise reduction method for an audio playback device, which performs noise reduction processing on a noise signal to be processed by the audio playback device according to a preset time interval and a preset inverted signal, wherein the preset inverted signal has an opposite phase to the noise signal to be processed by the audio playback device. Figure 3 The noise reduction method for the audio playback device shown in the figure, this embodiment also performs noise reduction processing on the noise signal of the audio playback device at a preset time interval by pre-setting an anti-phase signal with a phase opposite to the noise signal to be processed of the audio playback device, so as to periodically perform noise reduction processing on the audio playback device to improve the noise processing effect.

[0065] See also Fig. 9 , Fig. 9 A schematic diagram of a noise reduction method for an audio playback device provided by another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. Fig. 9 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0066] Step S410: superimposing the preset inverted signal and the noise signal to be processed to obtain a target signal, wherein the preset inverted signal and the noise signal to be processed of the audio playback device have opposite phases.

[0067] In this embodiment, the noise signal to be processed can be superimposed with a preset inverted signal to obtain a target signal, wherein, since the phases of the noise signal to be processed and the preset inverted signal are opposite, the energy of the target signal obtained by superimposing the noise signal to be processed with the preset inverted signal is smaller than the energy of the noise signal to be processed, that is, the noise impact of the obtained target signal on the user is smaller than the noise impact of the noise signal to be processed on the user.

[0068] In some embodiments, the goal can be to obtain a target signal by superimposing the noise signal to be processed and the preset inverted signal at the same time, so as to make the energy of the obtained target signal as close to 0 as possible, so as to completely cancel the noise signal to be processed by the preset inverted signal, so as to eliminate the influence of the noise signal to be processed on the user's use.

[0069] Step S420: Play the target signal.

[0070] In this embodiment, after obtaining the target signal, the target signal can be played, wherein, since the target signal is obtained by superimposing a preset anti-phase signal and a noise signal to be processed with opposite phases, the noise impact caused by playing the target signal is smaller than that caused by playing the noise signal to be processed, thereby reducing the impact of the noise signal to be processed. In addition, since the noise signal to be processed is weakened by the preset anti-phase signal in this embodiment, the spacing between electronic components does not need to be increased, and a small volume design of the audio playback device can be achieved.

[0071] In some embodiments, after the audio data path between the audio playback device and the audio providing device is opened, the audio playback device can receive the audio data sent by the audio providing device, and play the audio data together with the target signal. It can be understood that at this time, the noise signal to be processed is weakened or even offset, and the noise in the sound finally output by the audio playback device is very weak or even imperceptible to the user, thereby improving the user experience.

[0072] Another embodiment of the present application provides a method for reducing noise in an audio playback device, which superimposes a preset inverted signal with a noise signal to be processed to obtain a target signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed by the audio playback device, and plays the target signal. Figure 3 The noise reduction method for the audio playback device shown in the figure, this embodiment also superimposes a preset inverted signal with the noise signal to be processed to obtain and play the target signal, thereby improving the noise processing effect.

[0073] See also Fig.10 , Fig.10 A schematic diagram of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. Fig.10The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0074] Step S510: playing an inverted sound wave according to the preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device.

[0075] In this embodiment, after determining the preset inverted signal, the inverted sound wave can be played according to the preset inverted signal, wherein, since the preset inverted signal and the noise signal to be processed have opposite phases, the inverted sound wave played according to the preset inverted signal can offset the noise signal to be processed, thereby reducing the influence of the noise signal to be processed. In addition, since the noise signal to be processed is offset by the preset inverted signal in this embodiment, the spacing between electronic components does not need to be increased, and a small volume design of the audio playback device can be achieved.

[0076] In some embodiments, after the audio data path between the audio playback device and the audio providing device is opened, the audio playback device can receive the audio data sent by the audio providing device, and play the audio data together with the inverted sound wave determined according to the preset inverted signal. It can be understood that at this time, the inverted sound wave played according to the preset inverted signal and the noise signal to be processed cancel each other out, and the audio playback device finally outputs the audio data, thereby improving the user experience.

[0077] In another embodiment of the present application, a noise reduction method for an audio playback device is provided, which plays an inverted sound wave according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed by the audio playback device. Figure 3 The noise reduction method for the audio playback device shown in the figure, this embodiment also plays the inverted sound wave according to the preset inverted signal to offset the noise signal to be processed and improve the noise reduction processing effect.

[0078] See also Fig.11 , Fig.11 A schematic diagram of a noise reduction method for an audio playback device provided in another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. In this embodiment, the audio playback device is a Bluetooth headset. Fig.11 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0079] Step S610: Detect the wearing status of the Bluetooth headset.

[0080] 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.

[0081] In some embodiments, it is possible to detect whether the first Bluetooth headset is in a wearing state and whether the second Bluetooth headset is in a wearing state. Among them, it is possible to determine whether the first Bluetooth headset is in a wearing state 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 a wearing state, and when the first Bluetooth headset is not placed on the user's ear, it is determined that the first Bluetooth headset is in a non-wearing state. Similarly, it is possible to determine whether the second Bluetooth headset is in a 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, it is determined that the second Bluetooth headset is in a wearing state, and when the second Bluetooth headset is not placed on the user's ear, it is determined that the second Bluetooth headset is in a non-wearing state.

[0082] For example, when the first Bluetooth headset and the second Bluetooth headset are both in a wearing state, it may include the first Bluetooth headset being worn on the user's left ear and the second Bluetooth headset being worn on the user's right ear, or the first Bluetooth headset being worn on the user's right ear and the first Bluetooth headset being worn on the user's left ear; when only one of the first Bluetooth headset and the second Bluetooth headset is in a wearing state, it may include the first Bluetooth headset being worn on the user's left ear and the second Bluetooth headset being in a non-wearing state, the first Bluetooth headset being worn on the user's right ear and the second Bluetooth headset being in a non-wearing state, the second Bluetooth headset being worn on the user's right ear and the first Bluetooth headset being in a non-wearing state, and the second Bluetooth headset being worn on the user's left ear and the first Bluetooth headset being in a non-wearing state; when both the first Bluetooth headset and the second Bluetooth headset are in a non-wearing state, it indicates that the first Bluetooth headset and the second Bluetooth headset are not placed on the user's ears, which will not be repeated here.

[0083] As one approach, a 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 Bluetooth headset is placed on the user's ear, the first contact sensor contacts the user's ear to generate a first contact signal, and therefore, it may be determined whether the first Bluetooth headset is placed on the user's ear by a first contact parameter detected by the first contact sensor, wherein the first contact parameter may include a contact area and / or a contact point.

[0084] As one approach, the second Bluetooth headset includes a second earphone body and a second contact sensor disposed on the second earphone body, wherein the second contact sensor can be disposed on the outer surface of the second earphone body. When the second Bluetooth 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 is possible to determine whether the second Bluetooth headset is placed on the user's ear through a second contact parameter detected by the second contact sensor, wherein the second contact parameter can also include a contact area and / or a contact point.

[0085] As another way, the posture data of the first Bluetooth headset can be detected, and the posture data of the second Bluetooth headset can be detected. Specifically, the first Bluetooth headset can also include a first acceleration sensor and / or a first gyroscope, which are arranged in the first headset body and are used to detect the posture data of the first Bluetooth headset. Similarly, the second Bluetooth headset can also include a second acceleration sensor and / or a second gyroscope, which are arranged in the second headset body and are used to detect the posture data of the second Bluetooth headset and transmit the detected posture data.

[0086] As a method, the electronic device pre-stores the posture data of the Bluetooth headset when it is placed on the user's ear, wherein the posture data is configured as preset posture data, which is used as a basis for judging the posture data of the first Bluetooth headset and the posture data of the second Bluetooth headset detected. It can be understood that after detecting the first posture data of the first Bluetooth headset, the first posture data is compared with the preset posture data to determine whether the first posture data is consistent with the preset posture data or is within the error range allowed by the preset posture data. When the first posture data is consistent with the preset posture data or is within the error range allowed by the preset posture data, it can be determined that the posture data of the first Bluetooth headset meets the preset posture data, and it is determined that the first Bluetooth headset is in a wearing state. When the first posture data is inconsistent with the preset posture data or is outside the error range allowed by the preset posture data, it can be determined that the posture data of the first Bluetooth headset does not meet the preset posture data, and it is determined that the first Bluetooth headset is in a non-wearing state.

[0087] Similarly, after detecting the second posture data of the second Bluetooth headset, the second posture data is compared with the preset posture data to determine whether the second posture data is consistent with the preset posture data or is within the error range allowed by the preset posture data. When the second posture data is consistent with the preset posture data or is within the error range allowed by the preset posture data, it can be determined that the posture data of the second Bluetooth headset meets the preset posture data, and it is determined that the second Bluetooth headset is in a wearing state. When the second posture data is inconsistent with the preset posture data or is outside the error range allowed by the preset posture data, it can be determined that the posture data of the second Bluetooth headset does not meet the preset posture data, and it is determined that the second Bluetooth headset is in a non-wearing state.

[0088] Step S620: When the Bluetooth headset is in a wearing state, noise reduction processing is performed on the noise signal to be processed of the audio playback device according to the preset inverted signal, and the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device.

[0089] In this embodiment, when it is detected that the Bluetooth headset is in a worn state, it can be determined that the Bluetooth headset is in a used state, and the noise signal to be processed of the audio playback device can be noise reduced according to a preset inverted signal, thereby improving the user experience; when it is detected that the Bluetooth headset is not in a worn state, it can be determined that the Bluetooth headset is not in a used state, and the noise signal to be processed of the audio playback device can be noise reduced without using the preset inverted signal, thereby reducing the power consumption of the electronic device.

[0090] In some embodiments, when the Bluetooth headset is in a 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 outputting songs, voice, audio clips, etc. 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 noise signal to be processed, and noise reduction processing may not be performed on the noise signal to be processed of the audio playback device according to the preset inverted signal. When it is detected that the Bluetooth headset is muted, it can be considered that the influence of the noise signal to be processed is large, and noise reduction processing may be performed on the noise signal to be processed of the audio playback device according to the preset inverted signal to offset the noise signal to be processed.

[0091] 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, the first Bluetooth headset and the second Bluetooth headset both perform noise reduction processing on the noise signals to be processed of the first Bluetooth headset and the second Bluetooth headset according to a preset inverted signal; when it is detected that the first Bluetooth headset is in a wearing state and the second Bluetooth headset is in a non-wearing state, the first Bluetooth headset performs noise reduction processing on the noise signals to be processed of the first Bluetooth headset according to the preset inverted signal, and the second Bluetooth headset does not perform noise reduction processing on the noise signals to be processed of the second Bluetooth headset according to the preset inverted signal; when it is detected that the first Bluetooth headset is in a non-wearing state and the second Bluetooth headset is in a wearing state, the first Bluetooth headset does not perform noise reduction processing on the noise signals to be processed of the first Bluetooth headset according to the preset inverted signal, and the second Bluetooth headset performs noise reduction processing on the noise signals to be processed of the second Bluetooth headset according to the preset inverted signal; when it is detected that the first Bluetooth headset is in a non-wearing state and the second Bluetooth headset is in a non-wearing state, the first Bluetooth headset and the second Bluetooth headset do not perform noise reduction processing on the noise signals to be processed of the first Bluetooth headset and the second Bluetooth headset according to the preset inverted signal.

[0092] Another embodiment of the present application provides a noise reduction method for an audio playback device, which detects the wearing state of a Bluetooth headset. When the Bluetooth headset is in the wearing state, the noise signal to be processed by the audio playback device is subjected to noise reduction processing according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed by the audio playback device. Figure 3 The noise reduction method for the audio playback device shown in the figure, this embodiment also performs noise reduction processing on the noise signal to be processed of the Bluetooth headset when the Bluetooth headset is in a wearing state, so as to reduce the power consumption of the Bluetooth headset.

[0093] See also Fig.12 , Fig.12 A flow chart of a noise reduction method for an audio playback device provided by yet another embodiment of the present application is shown. The noise reduction method for an audio playback device is used to improve the noise reduction processing effect by playing an anti-phase signal of a preset frequency that is opposite in phase to the noise signal to be processed by the audio playback device and whose spectrum difference is within a preset range, and to achieve a small-volume design of the audio playback device, thereby improving the user experience. In a specific embodiment, the noise reduction method for an audio playback device is applied to Fig.15 The noise reduction device 400 of the audio playback device and the audio playback device 100 ( Figure 2 ). The following will take an audio playback device as an example to illustrate the specific process of this embodiment. Of course, it can be understood that the audio playback device used in this embodiment can be an audio playback device based on Bluetooth communication technology such as a Bluetooth headset, a Bluetooth speaker, etc., which is not limited here. Fig.12 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0094] Step S710: playing an anti-phase sound wave of a preset frequency, wherein the anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playback device and the frequency spectrum difference is within a preset range.

[0095] Among them, when the Bluetooth function of the audio playback device is turned on, the audio playback device will generate a noise signal to be processed with a fixed frequency. For example, a noise signal to be processed with a frequency of 800 Hz or a harmonic of 800 Hz will be generated. Therefore, in this embodiment, in order to perform noise reduction processing on the noise signal to be processed of the audio playback device, an inverted sound wave of a preset frequency can be played, wherein the inverted sound wave of the preset frequency is opposite to the phase of the noise signal to be processed of the audio playback device and the spectrum difference is within a preset range, for example, the preset frequency can include an inverted sound wave of a harmonic of 800 Hz or 800 Hz.

[0096] In some embodiments, after playing the inverted sound wave of a preset frequency, it can be detected whether the audio signal output by the audio playback device also includes the noise signal to be processed. When the detection result indicates that the audio signal output by the audio playback device still includes the noise signal to be processed, it indicates that the inverted sound wave of the preset frequency has not offset the noise signal to be processed, and a prompt tone can be played to cover the noise signal to be processed 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 the noise signal to be processed, it indicates that the inverted sound wave of the preset frequency has offset the noise signal to be processed, and the prompt tone may not be played.

[0097] In some embodiments, based on the different characteristics of the frequencies of the ambient noise signal and the noise signal to be processed, the present embodiment may pre-set and store the frequency corresponding to the noise signal to be processed, i.e., the preset frequency, which is used as a basis for judging the collected multiple noise signals. Therefore, in the present embodiment, multiple noise signals may be collected by the audio playback device. After the multiple noise signals are collected, the frequency of each noise signal in the multiple noise signals may be compared with the preset frequency to determine whether the frequency of each noise signal matches the preset frequency. According to the judgment result, the noise signal that does not belong to the preset frequency may be obtained from the multiple noise signals as the ambient noise signal. Among them, the audio playback device may pre-set and store a noise threshold, which is used as a basis for judging the ambient noise signal in the environment where the audio playback device is located. Therefore, in this embodiment, after detecting the ambient noise of the environment in which the audio playback device is located, the ambient noise can be compared with the noise threshold to determine whether the ambient noise signal is less than the noise threshold. When the ambient noise signal is less than the noise threshold, it can be considered that the ambient noise signal of the environment in which the audio playback device is located cannot cover the noise signal to be processed, and an inverted sound wave of a preset frequency can be played. When the ambient noise signal is not less than the noise threshold, it can be considered that the ambient noise signal of the environment in which the audio playback device is located can cover the noise signal to be processed, and an inverted sound wave of a preset frequency may not be played to reduce the power consumption of the audio playback device.

[0098] In some embodiments, the audio playback device may pre-set and store a volume threshold value, which 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 may be detected. After the volume of the audio output by the audio playback device is detected, the volume of the audio output by the audio playback device may be compared with the volume threshold value to determine whether the volume of the audio output by the audio playback device is less than the volume threshold value, wherein when the volume of the audio output by the audio playback device is less than the volume threshold value, it may be considered that the audio output by the audio playback device cannot cover the noise signal to be processed, and an inverted sound wave of a preset frequency may be played; when the volume of the audio output by the audio playback device is not less than the volume threshold value, it may be considered that the audio output by the audio playback device can cover the noise signal to be processed, and an inverted sound wave of a preset frequency may not be played, so as to reduce the power consumption of the audio playback device.

[0099] In some embodiments, the audio playback device may pre-set and store a power threshold, which is used as a basis for determining the remaining power of the audio playback device. Therefore, in this embodiment, the remaining power of the audio playback device may be detected, and after the remaining power of the audio playback device is detected, the remaining power may be compared with the power threshold to determine whether the remaining power is greater than the power threshold, wherein when the remaining power is greater than the power threshold, it may be considered that the audio playback device has sufficient remaining power to play the reversed-phase sound wave of the preset frequency, and the reversed-phase sound wave of the preset frequency may be played; when the remaining power is not greater than the power threshold, it may be considered that the audio playback device does not have sufficient remaining power to play the reversed-phase sound wave of the preset frequency, and the reversed-phase sound wave of the preset frequency may not be played, so as to reduce the power consumption of the audio playback device.

[0100] Yet another embodiment of the present application provides a noise reduction method for an audio playback device, which plays an inverted sound wave of a preset frequency, wherein the inverted sound wave of the preset frequency is opposite in phase to a noise signal to be processed by the audio playback device and the frequency spectrum difference is within a preset range. Thus, by playing an inverted signal of the preset frequency that is opposite in phase to the noise signal to be processed by the audio playback device and the frequency spectrum difference is within a preset range, the noise reduction processing effect is improved, the small volume design of the audio playback device is achieved, and the user experience is improved.

[0101] See also Fig.13 , Fig.13 A schematic diagram of a noise reduction method for an audio playback device provided in yet another embodiment of the present application is shown. The method is applied to the above-mentioned audio playback device. Fig.13 The process shown is described in detail, and the noise reduction method of the audio playback device may specifically include the following steps:

[0102] Step S810: During part or all of the Bluetooth communication process, play an anti-phase sound wave of a preset frequency, wherein the anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playback device and the spectrum difference is within a preset range.

[0103] In some implementations, since the audio playback device may generate current sound of a specific frequency during part or all of the Bluetooth communication process, that is, the audio playback device may generate a noise signal to be processed during part or all of the Bluetooth communication process. Therefore, in this embodiment, an inverted sound wave of a preset frequency may be played during part or all of the Bluetooth communication process to perform noise reduction processing on the noise signal to be processed by the audio playback device, so as to improve the noise reduction processing effect.

[0104] In some implementations, the current sound of the audio playback device is more prominent during the process of establishing the Bluetooth connection, that is, the noise signal to be processed generated by the audio playback device is more obvious during part or all of the process of establishing the Bluetooth connection. Therefore, in this embodiment, in the process of part or all of the process of establishing the Bluetooth connection, an inverted sound wave of a preset frequency can be played to perform noise reduction processing on the noise signal to be processed by the audio playback device, so as to improve the noise reduction processing effect.

[0105] In some embodiments, the fluctuation of the power supply output current will increase when in the paging or query state, which may cause the electronic devices such as batteries and inductors to generate a large electromagnetic field, thereby interfering with the current sound and other noises of sensitive devices such as speakers, that is, in the partial or full process of Bluetooth paging or Bluetooth query, the situation of the noise signal to be processed generated by the audio playback device is more obvious. Therefore, in this embodiment, in the partial or full process of Bluetooth paging or Bluetooth query, the reverse phase sound wave of the preset frequency can be played to perform noise reduction processing on the noise signal to be processed of the audio playback device to improve the noise reduction processing effect.

[0106] 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 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) will also be relatively large, that is, the noise signal is relatively large, that is, in the partial or full process of the audio playback device transmitting the Bluetooth signal, the situation of the noise signal to be processed generated by the audio playback device is more obvious. Therefore, in this embodiment, in the partial or full process of the audio playback device transmitting the Bluetooth signal, the reverse phase sound wave of the preset frequency can be played to perform noise reduction processing on the noise signal to be processed of the audio playback device to improve the noise reduction processing effect.

[0107] In yet another embodiment of the present application, a noise reduction method for an audio playback device is provided, in which an anti-phase sound wave of a preset frequency is played during part or all of the Bluetooth communication process, wherein the anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed by the audio playback device and the spectrum difference is within a preset range. Fig.12 The noise reduction method for the audio playback device shown in the figure, in this embodiment, also plays an inverted signal with a preset frequency, which is opposite in phase to the noise signal to be processed by the audio playback device and whose spectrum difference is within a preset range, during part or all of the Bluetooth communication process, so as to perform noise reduction processing on the audio playback device in a targeted manner and improve the noise processing effect.

[0108] See also Fig.14 , Fig.14The module block diagram of the noise reduction device for an audio player provided by an embodiment of the present application is shown. The noise reduction device 300 for the audio player is applied to the above-mentioned audio player. Fig.14 The block diagram shown in the figure is used to illustrate that the noise reduction device 300 of the audio playback device includes:

[0109] The noise reduction processing module 310 is used to perform noise reduction processing on the noise signal to be processed of the audio playback device according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device.

[0110] Furthermore, the noise reduction processing module 310 includes: a first noise reduction processing submodule, wherein:

[0111] The first noise reduction processing submodule is used to perform noise reduction processing on the noise signal to be processed of the audio playback device according to the preset inverted signal during part or all of the Bluetooth communication process.

[0112] Furthermore, the noise reduction processing module 310 includes: a second noise reduction processing submodule, wherein:

[0113] The second noise reduction processing submodule is used to perform noise reduction processing on the noise signal to be processed of the audio playback device according to the preset inverted signal at a preset time interval.

[0114] Furthermore, the noise processing module 310 includes: a target signal acquisition submodule and a target signal playback submodule, wherein:

[0115] The target signal acquisition submodule is used to superimpose the preset inverted signal and the noise signal to be processed to obtain a target signal.

[0116] The target signal playing submodule is used to play the target signal.

[0117] Furthermore, the noise processing module 310 includes: an anti-phase sound wave playing submodule, wherein:

[0118] The inverted sound wave playing submodule is used to play the inverted sound wave according to the preset inverted signal.

[0119] Further, when the audio playback device is a Bluetooth headset, the noise processing module 310 includes: a wearing state detection submodule and a third noise reduction processing submodule, wherein:

[0120] The wearing status detection submodule is used to detect the wearing status of the Bluetooth headset.

[0121] The third noise reduction processing submodule is used to perform noise reduction processing on the noise signal to be processed by the audio playback device according to the preset inverted signal when the Bluetooth headset is in a wearing state.

[0122] See also Fig.15 , Fig.15 The module block diagram of the noise reduction device for an audio player provided by an embodiment of the present application is shown. The noise reduction device 400 for the audio player is applied to the above-mentioned audio player. Fig.15 The block diagram shown in FIG. 4 is used to illustrate that the noise reduction device 400 of the audio playback device includes: an anti-phase sound wave playback module 410, wherein:

[0123] The anti-phase sound wave playing module 410 is used to play the anti-phase sound wave of a preset frequency, wherein the anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playing device and the spectrum difference is within a preset range.

[0124] Furthermore, the reverse phase sound wave playing module includes: a reverse phase sound wave playing submodule, wherein:

[0125] The inverse phase sound wave playing submodule is used to play the inverse phase sound wave of a preset frequency during part or all of the Bluetooth communication process.

[0126] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0127] In several embodiments provided in the present application, the coupling between modules may be electrical, mechanical or other forms of coupling.

[0128] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0129] See also Fig.16 , which shows a structural block diagram of a computer-readable storage medium provided in an embodiment of the present application. The computer-readable medium 500 stores program codes, which can be called by a processor to execute the method described in the above method embodiment.

[0130] The computer-readable storage medium 500 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer-readable storage medium 500 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 500 has storage space for program code 510 that performs any method steps in the above method. These program codes can be read from or written to one or more computer program products. The program code 510 can be compressed, for example, in an appropriate form.

[0131] In summary, the noise reduction method, device, electronic device and storage medium for an audio playback device provided in the embodiments of the present application perform noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal, wherein the preset inverted signal is opposite in phase to the noise signal to be processed of the audio playback device, thereby performing noise reduction processing on the noise signal of the audio playback device by pre-setting an inverted signal that is opposite in phase to the noise signal to be processed of the audio playback device, thereby improving the noise reduction processing effect, realizing a small volume design of the audio playback device, and improving the user experience.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause 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

1. A noise reduction method for an audio playback device, characterized in that: Applied to an audio playback device, the method comprises: During part or all of the Bluetooth communication process, at a preset time interval, according to a preset inverted signal, a noise reduction process is performed on a noise signal to be processed by the audio playback device, wherein the noise signal to be processed is caused by the Bluetooth communication of the audio playback device; The preset inverted signal is in opposite phase to the noise signal to be processed of the audio playback device, and the preset inverted signal is stored locally in the audio playback device after being preset.

2. The method according to claim 1, characterized in that The part or all of the process of Bluetooth communication includes: the part or all of the process of establishing Bluetooth connection.

3. The method according to claim 1, characterized in that The part or all of the Bluetooth communication process includes: the process in which the audio playback device transmits a Bluetooth signal.

4. The method according to claim 1, characterized in that: The part or the whole process of Bluetooth communication includes: the part or the whole process of Bluetooth paging or Bluetooth query.

5. The method according to claim 1, characterized in that: The noise signal to be processed includes an electric current acoustic signal caused by the audio playback device performing Bluetooth communication.

6. The method according to claim 5, characterized in that The current acoustic signal caused by the audio player performing Bluetooth communication includes: the current acoustic signal caused by the audio player transmitting Bluetooth signals causing the current change of the battery and / or inductor to form an electromagnetic field interfering with the components of the audio player.

7. The method according to claim 1, characterized in that The frequency spectrum of the preset inverted signal is the same as that of the noise signal to be processed, or the frequency spectrum difference is within a preset range.

8. The method according to claim 1, characterized in that The performing noise reduction processing on the to-be-processed noise signal of the audio playback device according to the preset inverted signal comprises: Superimposing the preset inverted signal and the noise signal to be processed to obtain a target signal; The target signal is played.

9. The method according to claim 1, characterized in that: The performing noise reduction processing on the to-be-processed noise signal of the audio playback device according to the preset inverted signal comprises: The inverted sound wave is played according to the preset inverted signal.

10. The method according to claim 1, characterized in that The frequency of the preset anti-phase signal is 800 Hz, or a harmonic of 800 Hz.

11. The method according to claim 1, characterized in that: The preset inverted signal is obtained according to the current acoustic signal caused by the audio player or a prototype of the audio player transmitting a Bluetooth signal, and the parameters of the preset inverted signal are preset in the audio player.

12. The method according to any one of claims 1 to 11, characterized in that: When the audio playback device is a Bluetooth headset, the performing noise reduction processing on the to-be-processed noise signal of the audio playback device according to the preset inverted signal comprises: Detecting the wearing status of the Bluetooth headset; When the Bluetooth headset is in a wearing state, noise reduction processing is performed on the to-be-processed noise signal of the audio playback device according to the preset inverted signal.

13. The method according to any one of claims 1 to 11, characterized in that: The preset time interval is the time interval for the audio playback device to transmit a Bluetooth signal.

14. A noise reduction method for an audio playback device, characterized in that: Applied to an audio playback device, the method comprises: During part or all of the Bluetooth communication process, playing an anti-phase sound wave of a preset frequency at a preset time interval; The anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playback device and the spectrum difference is within a preset range. The anti-phase sound wave of the preset frequency is pre-set and stored locally on the audio playback device. The noise signal to be processed is caused by the audio playback device performing Bluetooth communication.

15. The method according to claim 14, characterized in that The part or all of the process of Bluetooth communication includes: the part or all of the process of establishing Bluetooth connection.

16. The method according to claim 14, characterized in that The part or all of the Bluetooth communication process includes: the process in which the audio playback device transmits a Bluetooth signal.

17. The method according to claim 14, characterized in that The part or the whole process of Bluetooth communication includes: the part or the whole process of Bluetooth paging or Bluetooth query.

18. The method according to claim 14, characterized in that The preset frequency is 800 Hz, or a harmonic of 800 Hz.

19. The method according to any one of claims 14 to 18, characterized in that: The preset time interval is the time interval for the audio playback device to transmit a Bluetooth signal.

20. A noise reduction device for an audio playback device, characterized in that: Applied to an audio playback device, the device comprises: A noise reduction processing module, used for performing noise reduction processing on a noise signal to be processed of the audio playback device according to a preset inverted signal at a preset time interval during part or all of the Bluetooth communication process, wherein the noise signal to be processed is caused by the Bluetooth communication of the audio playback device; The preset inverted signal is in opposite phase to the noise signal to be processed of the audio playback device, and the preset inverted signal is stored locally in the audio playback device after being preset.

21. A noise reduction device for an audio playback device, characterized in that: Applied to an audio playback device, the device comprises: An inverted sound wave playing module, used to play an inverted sound wave of a preset frequency at a preset time interval during part or all of the Bluetooth communication process; The anti-phase sound wave of the preset frequency is opposite in phase to the noise signal to be processed of the audio playback device and the spectrum difference is within a preset range. The anti-phase sound wave of the preset frequency is pre-set and stored locally on the audio playback device. The noise signal to be processed is caused by the audio playback device performing Bluetooth communication.

22. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory is coupled to the processor, and the memory stores instructions. When the instructions are executed by the processor, the processor performs the method according to any one of claims 1 to 13 or any one of claims 14 to 19.

23. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the method according to any one of claims 1 to 13 or any one of claims 14 to 19.

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