WO2022252781A1

WO2022252781A1 - Noise reduction control method, electronic device, and computer-readable storage apparatus

Info

Publication number: WO2022252781A1
Application number: PCT/CN2022/083432
Authority: WO
Inventors: 韩坤; 廖昀; 罗鹏
Original assignee: 安克创新科技股份有限公司
Priority date: 2021-06-02
Filing date: 2022-03-28
Publication date: 2022-12-08
Also published as: CN113490089A; CN113490089B

Abstract

The present application provides a noise reduction control method, an electronic device, and a computer-readable storage apparatus. The noise reduction control method comprises: obtaining environmental noise, the environmental noise comprising a frequency band to be processed; obtaining a preset noise reduction amount of said frequency band, the preset noise reduction amount corresponding to a noise reduction requirement of a user for said frequency band; comparing the size of the preset noise reduction amount of said frequency band with that of a corresponding passive noise reduction amount, so as to obtain a comparison result; generating a first control parameter according to the comparison result to achieve the preset noise reduction amount; and sending the first control parameter to an earphone, so that the earphone performs, according to the first control parameter, noise control on said frequency band. The technical solution provided in the present application can perform relatively flexible noise control on environmental noise.

Description

Noise reduction control method, electronic device, and computer-readable storage device

This application claims the priority of the Chinese Patent Application No. 202110613689.5 filed on June 2, 2021, entitled "Noise Reduction Control Method, Electronic Equipment, and Computer-Readable Storage Device", which is incorporated by reference into this application.

【Technical field】

The present application relates to the technical field of noise reduction, and in particular to a noise reduction control method, electronic equipment, and a computer-readable storage device.

【Background technique】

Headphones with ANC (Active Noise Control, Active Noise Cancellation) function have excellent noise reduction effects. For example, when the earphones play audio, the earphones with ANC function can reduce the environmental noise to isolate the interference of the environmental noise and ensure the audio effect. However, the existing earphones with ANC function generally only have several fixed noise reduction modes and transparency modes, and the ambient noise is processed according to the fixed noise reduction modes and transparency modes, and cannot be flexibly adjusted.

【Content of invention】

The present application provides a noise reduction control method, an electronic device, and a computer-readable storage device, which can perform more flexible noise control processing on environmental noise.

The first technical solution adopted by this application is to provide a noise reduction control method, including: obtaining the environmental noise, which includes the frequency band to be processed; obtaining the preset noise reduction amount of the frequency band to be processed, and the preset noise reduction amount and the user Corresponding to the noise reduction requirements of the frequency band to be processed; comparing the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount to obtain a comparison result; generating the first control parameter according to the comparison result to achieve the preset Amount of noise reduction: sending the first control parameter to the earphone, so that the earphone performs noise control processing on the frequency band to be processed according to the first control parameter.

Optionally, generating the first control parameter according to the comparison result includes: if the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, generating a first sub-control parameter for active noise reduction of the frequency band to be processed Noise processing for further noise reduction; if the preset noise reduction amount of the frequency band to be processed is less than the corresponding passive noise reduction amount, a second sub-control parameter is generated for passive noise reduction and elimination processing of the frequency band to be processed to eliminate passive noise reduction Amount of noise reduction.

Optionally, generating the first sub-control parameter includes: calculating a first difference between the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount; generating the first sub-control parameter according to the first difference, Active noise reduction processing with the noise reduction amount used for the frequency band to be processed as the first difference; generating a second sub-control parameter, including: calculating the difference between the passive noise reduction amount of the frequency band to be processed and the corresponding preset noise reduction amount The second difference: generating a second sub-control parameter according to the second difference, so as to perform passive noise reduction and elimination processing with a cancellation amount of the second difference on the frequency band to be processed.

Optionally, generating the first control parameter according to the comparison result includes: judging whether the frequency band to be processed is in the active noise reduction area; The first sub-control parameter is used to perform active noise reduction processing on the frequency band to be processed to further reduce noise; if the preset noise reduction amount of the frequency band to be processed is less than the corresponding passive noise reduction amount, a second sub-control parameter is generated to It is used to perform passive noise reduction and elimination processing on the frequency band to be processed to eliminate the passive noise reduction amount; if not, when the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, active noise reduction will not be performed on the frequency band to be processed Processing, when the preset noise reduction amount of the frequency band to be processed is smaller than the corresponding passive noise reduction amount, generate a second sub-control parameter for performing passive noise reduction and elimination processing on the frequency band to be processed, so as to eliminate the passive noise reduction amount.

Optionally, comparing the preset noise reduction amount of the frequency band to be processed with the size of the corresponding passive noise reduction amount also includes: judging whether the frequency band to be processed is in the passive noise reduction area; The amount of noise reduction and the corresponding passive noise reduction amount; if not, generate a second control parameter according to the preset noise reduction amount, and send the second control parameter to the earphone, so that the amount of noise reduction for the frequency band to be processed by the earphone is Active noise reduction processing with preset noise reduction amounts.

Optionally, obtaining the preset noise reduction amount of the frequency band to be processed includes: obtaining a user's instruction for setting the noise reduction amount of the frequency band to be processed, and generating the preset noise reduction amount.

Optionally, the environmental noise includes a plurality of frequency bands to be processed; acquiring the environmental noise includes: picking up the environmental noise through its own microphone, or receiving the environmental noise picked up by the earphone.

The second technical solution adopted in this application is to provide an electronic device, including a display screen, a processor, a memory and a communication circuit, the display screen and the memory are coupled to the processor through the communication circuit, and the electronic device communicates with the earphone through the communication circuit; Computer instructions are stored in the memory; the processor executes the above noise reduction control method when running the computer instructions.

The third technical solution adopted by the present application is to provide a computer-readable storage device storing computer instructions that can be executed by a processor, and the computer instructions can implement the above noise reduction control method when executed by the processor.

The fourth technical solution adopted by the present application is to provide another noise reduction control method, including: receiving the first control parameter, the first control parameter is obtained by the electronic device after obtaining the environmental noise and the frequency band to be processed in the environmental noise The preset noise reduction amount, and compare the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount, get the comparison result, and generate according to the comparison result to achieve the preset noise reduction amount ; Perform noise control processing on the frequency band to be processed according to the first control parameter.

Beneficial effects of the present application: the electronic device obtains the comparison result by comparing the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount, so that the type of noise control processing required by the frequency band to be processed can be flexibly identified, such as Active noise reduction processing or passive noise reduction processing. The electronic device further generates a first control parameter for achieving a preset noise reduction amount according to the comparison result, and sends the first control parameter to the earphone, and the earphone performs noise control processing on the frequency band to be processed according to the first control parameter. Compared with a fixed noise reduction mode or a transparent mode, the noise reduction control method is more flexible, more targeted, and more adaptable to different environmental noises.

【Description of drawings】

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. 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 based on these drawings without creative effort.

Fig. 1 is a schematic flow chart of an embodiment of the noise reduction control method of the present application;

Fig. 2 is a schematic diagram of the relationship between the passive noise reduction amount and the frequency in the passive noise reduction area;

Fig. 3 is a schematic diagram of a data adjustment chart in an embodiment of S31 shown in Fig. 1;

Fig. 4 is another schematic diagram of the data adjustment chart in an embodiment of S31 shown in Fig. 1;

FIG. 5 is a schematic diagram of the relationship between the passive noise reduction area and the active noise reduction area and frequency.

6 is a schematic diagram of the relationship between the active noise reduction amount and the frequency in the active noise reduction area;

FIG. 7 is a schematic structural diagram of an embodiment of the electronic device of the present application;

FIG. 8 is a schematic flowchart of another embodiment of the noise reduction control method of the present application;

Fig. 9 is a schematic diagram of a noise reduction process of an embodiment of the earphone of the present application;

FIG. 10 is a schematic structural diagram of an embodiment of a computer-readable storage device of the present application;

FIG. 11 is another schematic flowchart of the noise reduction control method shown in FIG. 1 .

【Detailed ways】

The application will be described in further detail below in conjunction with the accompanying drawings and embodiments. In particular, the following examples are only used to illustrate the present application, but not to limit the scope of the present application. Likewise, the following embodiments are only some of the embodiments of the present application but not all of them, and all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

"Electronic equipment" as referred to in this application includes, but is not limited to, configured to be connected via a wireline connection (such as via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and/or another a data connection/network) and/or via (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal A device that receives/transmits communication signals through a wireless interface. For example, smartphones, tablets, notebook computers and wearable devices, etc.

The terms "first", "second", and "third" in this application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship between the various components in a certain posture (as shown in the drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of an embodiment of a noise reduction control method of the present application. The noise reduction control method described in this embodiment can be applied to electronic devices such as computers, smart watches, smart phones, and tablets, and may specifically include the following steps:

S10: Obtain ambient noise, which includes a frequency band to be processed.

Specifically, electronic devices can pick up ambient noise. In some implementations, the electronic device can pick up ambient noise through its own microphone. In some implementations, the electronic device can also receive ambient noise picked up by the earphone. For example, the electronic device and the earphone can be connected through a wired connection or a wireless communication method such as Bluetooth, and the earphone picks up ambient noise and then sends it to the electronic device. Of course, electronic devices can also pick up ambient noise picked up by other electronic devices.

Wherein, the frequency of the environmental noise is usually in the range of 10-10000 Hz, which can be divided into multiple frequency bands to be processed. For example, the width of each frequency band to be processed can be different, and the environmental noise can be divided into 10-100Hz, 100-200Hz, 200-400Hz, 400-800Hz, 800-1000Hz, 1000-2000Hz, 2000-4000Hz, 4000-6000Hz , 6000-8000Hz, 8000-10000Hz and other 10 frequency bands to be processed. The multiple frequency bands to be processed may be all frequency bands of the environmental noise, or may be part of the frequency bands in the environmental noise.

In some implementation manners, the widths of the frequency bands to be processed may also be the same, which is not limited in the present application, and those skilled in the art may select according to actual needs. In some embodiments, the environmental noise can also be divided into 6 frequency bands to be processed, or 8 frequency bands to be processed, or 12 frequency bands to be processed, or even more frequency bands to be processed. This application is not limited, and those skilled in the art You can choose according to actual needs.

S30: Obtain a preset noise reduction amount of the frequency band to be processed, where the preset noise reduction amount corresponds to the noise reduction requirement of the user for the frequency band to be processed.

In some implementations, the preset noise reduction amount of the frequency band to be processed can be set by the user, specifically as shown in the following steps included in S30:

S31: Obtain a user's instruction for setting a noise reduction amount of a frequency band to be processed, and generate a preset noise reduction amount.

For example, after the electronic device acquires the environmental noise, it can present a data adjustment chart corresponding to the environmental noise on the display interface of its display screen, so that the user can perform a noise reduction amount setting operation on the data adjustment chart. In some implementations, the data adjustment graph can be similar to an EQ equalizer.

For example, the electronic device can generate an original data adjustment chart according to the original volume of each frequency band to be processed in the environmental noise, as shown in FIG. 3 , which is a schematic diagram of the data adjustment chart in an implementation of S31 shown in FIG. 1 . Further, the user can perform a noise reduction amount setting operation based on the raw data adjustment chart, so that the electronic device generates a corresponding preset noise reduction amount. There are many ways to set the noise reduction amount:

For example, the user can first select a frequency band to be processed with an original volume of 20dB on the display interface, and then set the volume of the frequency band to be processed to 10dB by sliding or clicking the display screen of the electronic device, as shown in Figure 4, Figure 4 It is another schematic diagram of the data adjustment chart in an embodiment of S31 shown in FIG. 1 . By calculating the difference between the set volume of 10dB of the frequency band to be processed and the original volume of 20dB, the preset noise reduction amount of 10dB of the frequency band to be processed can be obtained.

On the one hand, since the preset noise reduction amount of each frequency band to be processed can be any value freely set by the user, for example, if the original volume of a certain frequency band to be processed is 20dB, the preset noise reduction amount can be set to 0 Any value required by the user between -20dB, not limited to several fixed values of the inherent noise reduction mode or the transparency mode. Therefore, the noise reduction control method enables users to fully customize the preset noise reduction amount of the frequency band to be processed according to their own needs, which is conducive to improving the degree of freedom of the noise control.

On the other hand, the preset noise reduction amount of each frequency band to be processed can be set to different values. For example, the preset noise reduction amount of one of the frequency bands to be processed can be set to 10dB, and the preset noise reduction amount of the other frequency band to be processed can be set to 10dB. Set the noise reduction amount to 20dB, so that in a complex noise environment, the user can selectively receive or selectively shield the environmental noise of certain frequency bands to be processed, so as to meet the special needs of the user, not limited to only through Inherent noise reduction mode or transparent mode for noise control.

For example, when the environmental noise includes mechanical noise and a crying baby in the passive noise reduction area, the user can selectively eliminate the mechanical noise and receive the crying baby. Therefore, the noise reduction control method can flexibly meet different noise reduction requirements of users for various environmental noises.

In some embodiments, the preset noise reduction amount of the frequency band to be processed can be automatically set by the electronic device. For example, an automatic setting button can be further displayed on the display interface of the electronic device. The user can click the automatic setting button, and the electronic device can automatically set the noise reduction amount of each frequency band to be processed according to the monitored environmental noise in response to the click operation. On this basis, it can further respond to the user's operation, and further adjust the amount of noise reduction automatically set to meet the specific needs of the user.

In some implementation manners, the preset noise reduction amount of the frequency band to be processed may also be sent by other electronic devices, or obtained from the cloud. After the electronic device receives the preset noise reduction amount, the user can also adjust the received preset noise reduction amount to form the final preset noise reduction amount. This application does not limit this, and those skilled in the art can Choose according to actual needs.

S50: Comparing the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount to obtain a comparison result.

In this embodiment, the earphone may be an in-ear earphone, a headphone or a semi-in-ear earphone. When the earphone is worn, due to its structure, material and other characteristics, it physically isolates the noise of some frequency bands, that is, it has a passive noise reduction function.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of the relationship between the passive noise reduction amount and the frequency in the passive noise reduction area. The passive noise reduction area may refer to the frequency range in which the passive noise reduction function of the earphone can work, which is determined by the characteristics of the earphone itself, which is not limited in this application. After the headset is manufactured, its passive noise reduction area is relatively stable when worn correctly. The passive noise reduction areas of different headphones may vary due to their respective characteristics.

For example, the preset minimum frequency of the passive noise reduction zone may be 500 Hz, and the preset maximum frequency may be 10000 Hz, that is, the frequency range of the passive noise reduction zone may be between 500-10000 Hz. That is to say, in the frequency range of 10-500Hz, there is no passive noise reduction, or the passive noise reduction is 0, and in the frequency range of 500-10000Hz, there is passive noise reduction, or the passive noise reduction Greater than 0.

Further, before S50, it is necessary to determine whether there is a corresponding amount of passive noise reduction in the frequency band to be processed. Please refer to FIG. 11. FIG. 11 is another schematic flowchart of the noise reduction control method shown in FIG. The following steps are implemented:

S40: Determine whether the frequency band to be processed is in a passive noise reduction area.

In some implementation manners, S40 may be implemented through the following steps:

It is judged whether the highest frequency value of the frequency band to be processed is greater than the first threshold. Wherein, the first threshold is a preset minimum frequency of the passive noise reduction area. As mentioned above, the preset minimum frequency in the passive noise reduction area may refer to the lowest frequency value at which the passive noise reduction function of the earphone can work, and is a performance parameter of the earphone itself. In some headsets, the first threshold can be adjusted artificially. In some implementations, the first threshold may be built into a client of the electronic device, such as a corresponding APP on a smart phone.

If the highest frequency value of the frequency band to be processed is greater than the first threshold, the frequency band to be processed is in a passive noise reduction region. Specifically, if the highest frequency value of the frequency band to be processed is greater than the first threshold, it indicates that the frequency band to be processed is at least partially within the passive noise reduction area. If the highest frequency value of the frequency band to be processed is less than or equal to the first threshold, the frequency band to be processed is not in the passive noise reduction area.

S41: If yes, execute S50.

As shown in Figure 2, the frequency range of the passive noise reduction area can be between 500-10000 Hz. In this frequency range, the passive noise reduction amount of the passive noise reduction area can first gradually increase with the increase of the frequency, and then roughly Keep it at a constant value. For the sound of the same frequency, the amount of passive noise reduction is roughly a constant value.

The relationship between the passive noise reduction amount and frequency in the passive noise reduction area is determined by the characteristics of the earphone itself. The above description of the relationship between the passive noise reduction amount and frequency in the passive noise reduction area is just an example, not Those skilled in the art can choose the limitations of the present application according to actual needs.

The earphone itself has its own passive noise reduction effect, such as the earmuffs and ear caps of the earphone. After wearing the earphone, it will play a certain passive noise reduction effect. Therefore, the earphone has a corresponding passive noise reduction amount in each frequency band. When the frequency band to be processed is in the passive noise reduction area, if the preset noise reduction amount of a certain frequency band to be processed is equal to the corresponding passive noise reduction amount, it means that the noise reduction requirement has been met, and no further noise control is required for the frequency band to be processed deal with. If the preset noise reduction amount of a frequency band to be processed is greater than the corresponding passive noise reduction amount, it means that pure passive noise reduction cannot meet the noise reduction requirements, and further active noise reduction processing is required for the frequency band to be processed. If the preset noise reduction amount of a frequency band to be processed is less than the corresponding passive noise reduction amount, it means that the frequency band to be processed is the sound that the user needs to hear, and passive noise reduction and elimination processing is required for the frequency band to be processed to eliminate the earphone noise. The amount of passive noise reduction produced by Inherent Passive Noise Cancellation.

S42: If not, generate a second control parameter according to the preset noise reduction amount, and send the second control parameter to the earphone, so that the earphone performs active noise reduction processing with the preset noise reduction amount for the frequency band to be processed.

When the frequency band to be processed is not in the passive noise reduction area, there is no corresponding passive noise reduction amount in the second frequency band to be processed, or in other words, the corresponding passive noise reduction amount is 0. The electronic device can directly generate a second control parameter according to the preset noise reduction amount, and send it to the earphone, so that the earphone can perform active noise reduction processing on the second frequency band to be processed according to the second control parameter, and the noise reduction amount is the preset noise reduction amount .

The noise reduction control method performs different noise control processing on the frequency band to be processed in the passive noise reduction area and the frequency band to be processed not in the passive noise reduction area, which is beneficial to improve the accuracy of noise reduction, so that the actual noise reduction amount and the expected Set the amount of noise reduction to match.

S70: Generate a first control parameter according to the comparison result, so as to achieve a preset noise reduction amount.

The first control parameter generated by the electronic device may be used to adjust related settings or parameters of the earphone, so that the earphone can perform noise control processing on the frequency band to be processed according to the first control parameter.

Compared with the fixed noise reduction mode (isolate the external noise) or the transparent mode (completely introduce the external noise) in the prior art, the corresponding first control parameter is generated according to the comparison result, which can target the frequency bands to be processed with different comparison results Different noise control processes are carried out to make the noise reduction control more flexible, more targeted, and more adaptable to different environmental noises.

For example, for the comparison results, active noise reduction can be performed on one of the frequency bands to be processed, and passive noise reduction can be performed on the other frequency band to be processed, not limited to the inherent noise reduction mode or transparent mode, so that the active Noise reduction processing and passive noise reduction processing can coexist and cooperate with each other, breaking through the limitations of traditional fixed noise reduction mode or transparent mode, making noise reduction control more flexible.

For S70, it can be realized through the following steps:

S71: If the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, generate a first sub-control parameter for performing active noise reduction processing on the frequency band to be processed to further reduce noise.

Wherein, for the step of generating the first sub-control parameter in S71, it can be realized through the following steps:

S711: Calculate a first difference between the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount.

S712: Generate a first sub-control parameter according to the first difference, so as to perform active noise reduction processing with a noise reduction amount equal to the first difference for the frequency band to be processed.

For example, if the preset noise reduction amount of the frequency band to be processed is 20dB, and the corresponding passive noise reduction amount is 10dB, it means that pure passive noise reduction cannot meet the user's noise reduction needs, and further active noise reduction is required for the frequency band to be processed deal with.

The "active noise reduction processing" mentioned in this embodiment may refer to: the earphones use external and/or built-in microphones (that is, noise reduction technology of feedforward combined with feedback) to collect environmental noise, and the loudspeaker plays the same size and phase The opposite sound is used to offset the effect of environmental noise, so that users can avoid being disturbed by external sounds.

Specifically, the electronic device may first calculate the first difference of 10dB between the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount, and then generate the first sub-control parameter according to the first difference of 10dB, and the headset then Active noise reduction processing with a noise reduction amount of the first difference may be further performed on the frequency band to be processed according to the first sub-control parameter, so as to satisfy the preset noise reduction amount.

S72: If the preset noise reduction amount of the frequency band to be processed is smaller than the corresponding passive noise reduction amount, generate a second sub-control parameter for performing passive noise reduction and elimination processing on the frequency band to be processed, so as to eliminate the passive noise reduction amount.

Wherein, for the step of generating the second sub-control parameter in S72, it can be realized through the following steps:

S721: Calculate a second difference between the passive noise reduction amount of the frequency band to be processed and the corresponding preset noise reduction amount.

S722: Generate a second sub-control parameter according to the second difference, so as to perform passive noise reduction and elimination processing in which the cancellation amount is the second difference on the frequency band to be processed.

For example, if the preset noise reduction amount of the frequency band to be processed is 5dB, and the corresponding passive noise reduction amount is 10dB, it means that the inherent passive noise reduction function of the earphone has shielded the sound that the user wants to hear, and further Eliminates the amount of passive noise cancellation created by the headphones' inherent passive noise cancellation.

The "passive noise reduction and elimination processing" mentioned in this embodiment may refer to: the earphone uses an external microphone to collect ambient sound, and introduces it to the speaker for playback, so as to offset the passive noise reduction effect formed by wearing the earphone, so that the user can clearly Hear outside voices.

Specifically, the electronic device may first calculate the second difference 5dB between the passive noise reduction amount of the frequency band to be processed and the corresponding preset noise reduction amount, and then generate the second sub-control parameter according to the second difference value 5dB, and the earphone then The frequency band to be processed may be further processed according to the second sub-control parameter, and the passive noise reduction processing whose elimination amount is the second difference value may be performed, so as to satisfy the preset noise reduction amount.

Compared with the fixed noise reduction mode (isolate the external noise) or the transparent mode (completely introduce the external noise) in the prior art, this embodiment compares the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction Active noise reduction processing is performed on frequency bands whose preset noise reduction amount is greater than the corresponding passive noise reduction amount, and passive noise reduction is performed on frequency bands whose preset noise reduction amount is smaller than the corresponding passive noise reduction amount. .

In this embodiment, by establishing a composite noise reduction system of active noise reduction processing and passive noise reduction processing, it is possible to flexibly perform different noise control processing on each frequency band to be processed in the passive noise reduction area. It is more flexible and more effective to meet the different noise reduction requirements of users for different frequency bands to be processed.

Please refer to FIG. 5 and FIG. 6 together. FIG. 5 is a diagram showing the relationship between the passive noise reduction area and the active noise reduction area and frequency. FIG. 6 is a schematic diagram of the relationship between the active noise reduction amount and the frequency in the active noise reduction area.

The active noise reduction area may refer to the frequency range in which the active noise reduction function of the earphone can work, which is determined by the characteristics of the earphone itself, which is not limited in this application. For example, the preset minimum frequency of the active noise reduction zone can be 10Hz, and the preset maximum frequency can be 1000Hz. That is to say, the frequency range of the active noise reduction zone can be between 10-1000Hz. Ambient noise, which is not affected by active noise reduction processing.

For the sound of the same frequency, the amount of active noise reduction can be changed according to the parameter settings of the earphones, as shown in Figure 6. Figure 6 shows three curves, which respectively represent the earphones under different parameter settings. ANC amount vs. frequency.

Within the frequency range of 500-10000Hz in the passive noise reduction area, some frequency ranges can be processed by active noise reduction technology, that is, the active noise reduction technology can cover. The other part of the frequency range cannot be actively noise-cancelled by active noise-cancellation technology. In other words, there are overlapping frequency bands between the passive noise reduction area and the active noise reduction area.

Furthermore, in S70, it is necessary to further determine whether active noise reduction processing can be performed on the frequency band to be processed in the passive noise reduction area, please continue to refer to Figure 11, which can be realized through the following steps included in S70:

S701: Determine whether the frequency band to be processed is in an active noise reduction area.

In some implementation manners, S701 may be implemented through the following steps:

It is judged whether the lowest frequency value of the frequency band to be processed is greater than or equal to a second threshold, where the second threshold is a preset highest frequency of the active noise reduction area. As mentioned above, the preset maximum frequency in the active noise reduction area may refer to the highest frequency value at which the active noise reduction function of the earphone can work, which is a performance parameter of the earphone itself. In some headsets, the second threshold can be adjusted artificially. In some implementations, the second threshold can be built into a client of the electronic device, such as a corresponding APP on a smart phone.

If the lowest frequency value of a frequency band to be processed is smaller than the second threshold, the frequency band to be processed is in an active noise reduction region. Specifically, the frequency band to be processed is at least partially located in an active noise reduction area, and the active noise reduction processing can reduce noise on the frequency band to be processed. If the lowest frequency value of a frequency band to be processed is greater than or equal to the second threshold, it means that active noise processing cannot reduce noise for the frequency band to be processed, and the frequency band to be processed is not in the active noise reduction area.

S702: If yes, execute S71 and S72.

S703: If not, when the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, active noise reduction processing is not performed on the frequency band to be processed, and the preset noise reduction amount of the frequency band to be processed is smaller than the corresponding passive noise reduction amount. When the amount of noise is used, a second sub-control parameter is generated for performing passive noise reduction and elimination processing on the frequency band to be processed, so as to eliminate the amount of passive noise reduction.

Wherein, the step of generating the second sub-control parameter in S703 may be the same as or similar to the step of generating the second sub-control parameter in S72, and will not be repeated here.

S90: Send the first control parameter to the earphone, so that the earphone performs noise control processing on the frequency band to be processed according to the first control parameter.

As mentioned above, the electronic device and the earphone can be connected through wired connection or wireless communication means such as bluetooth. Therefore, the electronic device can send the first control parameter to the earphone. The earphone receives the first control parameter, and then performs noise control processing on the frequency band to be processed according to the first control parameter.

The electronic device obtains the comparison result by comparing the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount, so that the type of noise control processing required for the frequency band to be processed can be flexibly identified, such as active noise reduction processing or passive noise reduction Noise reduction processing. The electronic device further generates a first control parameter for achieving a preset noise reduction amount according to the comparison result, and sends the first control parameter to the earphone, and the earphone performs noise control processing on the frequency band to be processed according to the first control parameter. Compared with a fixed noise reduction mode or a transparent mode, the noise reduction control method is more flexible, more targeted, and more adaptable to different environmental noises.

In general, the noise reduction control method provided in this embodiment enables the noise isolation of the earphone to be freely adjusted within the full frequency band of 10-10000 Hz by establishing a composite debugging system of active noise reduction processing and passive noise reduction processing .

Please refer to FIG. 7 . FIG. 7 is a schematic structural diagram of an embodiment of an electronic device of the present application. The electronic device 100 may include a display screen 110 , a processor 120 , a memory 130 and a communication circuit 140 , the display screen 110 and the memory 130 are coupled to the processor 120 through the communication circuit 140 , and the electronic device 100 communicates with the earphone through the communication circuit 140 . Wherein, the memory 130 stores computer instructions, and the processor 120 executes any one of the above noise reduction control methods when executing the computer instructions.

The processor 120 is used to operate the electronic device 100, and the processor 120 may also be called a CPU (Central Processing Unit, central processing unit). The processor 120 may be an integrated circuit chip with signal processing capabilities. The processor 120 can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . The general purpose processor may be a microprocessor or the processor 120 may be any conventional processor or the like.

The communication circuit 140 may be an interface for the electronic device 100 to communicate with an earphone or other electronic devices, such as a transceiver. Memory 130 may include random access memory (RAM), read only memory (ROM), flash memory, erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, Removable disks, CD-ROMs, etc. Memory 130 may store program data, which may include, for example, a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple memories 130 . The memory 130 may be coupled to the processor 120 such that the processor 120 can read and write information from/to the memory 130 . Of course, the memory 130 may be integrated into the processor 120 .

Please refer to FIG. 8 . FIG. 8 is a schematic flowchart of another embodiment of the noise reduction control method of the present application. The noise reduction control method described in this embodiment can be applied to earphones, and may specifically include the following steps:

S210: Receive the first control parameter, the first control parameter is obtained by the electronic device after acquiring the environmental noise, the preset noise reduction amount of the frequency band to be processed in the environmental noise, and compare the preset noise reduction amount of the frequency band to be processed. The noise reduction amount and the corresponding passive noise reduction amount are set, a comparison result is obtained, and the result generated according to the comparison result is used to achieve the preset noise reduction amount.

S220: Perform noise control processing on the frequency band to be processed according to the first control parameter.

Specifically, the headset in this application may include a feedforward microphone, a feedback microphone, an active noise reduction filter, a passive noise reduction filter, a speaker, and a Bluetooth module. Wherein, the bluetooth module is used for receiving control parameters. As mentioned above, the control parameters may include a first control parameter (including a first sub-control parameter and a second sub-control parameter) and a second control parameter. The active noise reduction filter may include a first noise reduction filter and a second noise reduction filter.

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of a noise reduction process of an embodiment of the earphone of the present application.

For the frequency band to be processed in the overlapping area of the active noise reduction area and the passive noise reduction area, when the preset noise reduction amount is greater than the corresponding passive noise reduction amount, the Bluetooth module receives the first sub-control parameter from the electronic device, the first The noise reduction filter controls the input signal gain of the feedforward microphone according to the first sub-control parameter, and the second noise reduction filter controls the input signal gain of the feedback microphone according to the first sub-control parameter, so as to achieve the preset reduction for the frequency band to be processed. Active Noise Cancellation processing.

For the frequency band to be processed in the overlapping area of the active noise reduction area and the passive noise reduction area, when the preset noise reduction amount is less than the corresponding passive noise reduction amount, the Bluetooth module receives the second sub-control parameter from the electronic device, and the passive noise reduction The noise filter controls the input signal gain of the feedforward microphone according to the second sub-control parameter, so as to perform passive noise reduction and elimination processing on the frequency band to be processed that can reach its preset noise reduction amount.

For the frequency band to be processed that is in the active noise reduction area but not in the passive noise reduction area, the Bluetooth module receives the second control parameter from the electronic device, and the first noise reduction filter controls the input signal gain of the feedforward microphone according to the second control parameter , the second noise reduction filter controls the input signal gain of the feedback microphone according to the second control parameter, so as to perform active noise reduction processing on the frequency band to be processed that can reach its preset noise reduction amount.

For the frequency band to be processed that is in the passive noise reduction area but not in the active noise reduction area, when the preset noise reduction amount is less than the corresponding passive noise reduction amount, the Bluetooth module receives the second sub-control parameter from the electronic device, passive The noise reduction filter controls the input signal gain of the feedforward microphone according to the second sub-control parameter, so as to perform passive noise reduction and elimination processing on the frequency band to be processed that can reach its preset noise reduction amount.

In the several embodiments provided in this application, it should be understood that the disclosed noise reduction control method may be implemented in other ways. For example, the electronic device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined Or it can be integrated into another system, or some features can be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Please refer to FIG. 10, FIG. 10 is a schematic structural diagram of an embodiment of a computer-readable storage device of the present application. If the above-mentioned integrated unit is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a storage device with a storage function. in the computer readable storage device 200. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a computer-readable In the storage device 200, several computer instructions (program data) are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the methods of various embodiments of the present invention step. The aforementioned computer-readable storage device 200 includes: various storage media such as U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. And electronic devices such as computers, mobile phones, notebook computers, tablet computers, cameras, etc. that have the above-mentioned storage media.

The above descriptions are only part of the embodiments of the application, and are not intended to limit the scope of protection of the application. All equivalent devices or equivalent process transformations made by using the contents of the specification and drawings of the application, or directly or indirectly used in other related All technical fields are equally included in the patent protection scope of the present application.

Claims

A noise reduction control method, characterized in that, comprising:

Acquire environmental noise, where the environmental noise includes a frequency band to be processed;

Acquiring a preset noise reduction amount of the frequency band to be processed, where the preset noise reduction amount corresponds to a user's noise reduction requirement for the frequency band to be processed;

Comparing the preset noise reduction amount of the frequency band to be processed with the corresponding passive noise reduction amount to obtain a comparison result;

generating a first control parameter according to the comparison result for achieving the preset noise reduction amount;

Sending the first control parameter to the earphone, so that the earphone performs noise control processing on the frequency band to be processed according to the first control parameter.
The noise reduction control method according to claim 1, wherein:

The generating the first control parameter according to the comparison result includes:

If the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, a first sub-control parameter is generated to perform active noise reduction processing on the frequency band to be processed to further reduce noise;

If the preset noise reduction amount of the frequency band to be processed is smaller than the corresponding passive noise reduction amount, a second sub-control parameter is generated to perform passive noise reduction and elimination processing on the frequency band to be processed to eliminate The amount of passive noise reduction.
The noise reduction control method according to claim 2, wherein:

The generating the first sub-control parameter includes:

calculating a first difference between the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount;

generating the first sub-control parameter according to the first difference, so as to perform active noise reduction processing on the frequency band to be processed whose noise reduction amount is the first difference;

Said generating the second sub-control parameter includes:

calculating a second difference between the passive noise reduction amount of the frequency band to be processed and the corresponding preset noise reduction amount;

The second sub-control parameter is generated according to the second difference, so as to perform passive noise reduction and elimination processing on the frequency band to be processed with a removal amount equal to the second difference.
The noise reduction control method according to claim 2, wherein:

The generating the first control parameter according to the comparison result includes:

Judging whether the frequency band to be processed is in an active noise reduction area;

If yes, execute the step of generating a first sub-control parameter for actively reducing the frequency band to be processed if the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount. Noise processing to further reduce noise; if the preset noise reduction amount of the frequency band to be processed is less than the corresponding passive noise reduction amount, a second sub-control parameter is generated for performing the noise reduction on the frequency band to be processed passive noise reduction removal processing to remove said passive noise reduction amount;

If not, when the preset noise reduction amount of the frequency band to be processed is greater than the corresponding passive noise reduction amount, active noise reduction processing is not performed on the frequency band to be processed, and the When the preset noise reduction amount is smaller than the corresponding passive noise reduction amount, a second sub-control parameter is generated for performing passive noise reduction processing on the frequency band to be processed so as to eliminate the passive noise reduction amount.
The noise reduction control method according to claim 1, wherein:

The comparison of the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount also includes:

judging whether the frequency band to be processed is in a passive noise reduction area;

If so, performing the comparison between the preset noise reduction amount of the frequency band to be processed and the corresponding passive noise reduction amount;

If not, generate a second control parameter according to the preset noise reduction amount, and send the second control parameter to the earphone, so that the earphone performs noise reduction on the frequency band to be processed by the Active noise reduction processing with preset noise reduction amounts.
The noise reduction control method according to claim 1, wherein:

The acquisition of the preset noise reduction amount of the frequency band to be processed includes:

Obtain a user's instruction for setting the noise reduction amount of the frequency band to be processed, and generate the preset noise reduction amount.
The noise reduction control method according to claim 6, wherein:

The environmental noise includes multiple frequency bands to be processed,

The acquisition of ambient noise includes:

Pick up the ambient noise through its own microphone, or receive the ambient noise picked up by the earphone.
A noise reduction control method, characterized in that, comprising:

Receive the first control parameter, the first control parameter is obtained by the electronic device after acquiring the environmental noise, the preset noise reduction amount of the frequency band to be processed in the environmental noise, and compare the preset noise reduction amount of the frequency band to be processed The noise amount and the corresponding passive noise reduction amount are compared to obtain the comparison result, which is generated according to the comparison result and used to achieve the preset noise reduction amount;

Perform noise control processing on the frequency band to be processed according to the first control parameter.
An electronic device, characterized in that it includes a display screen, a processor, a memory, and a communication circuit, the display screen and the memory are coupled to the processor through the communication circuit, and the electronic device is connected to the processor through the communication circuit communicate with the headset;

computer instructions are stored in the memory;

The processor executes the noise reduction control method according to any one of claims 1 to 7 when running the computer instructions.
A computer-readable storage device, characterized in that computer instructions that can be executed by a processor are stored, and when the computer instructions are executed by the processor, the noise reduction described in any one of claims 1 to 7 can be realized Control Method.