WO2019191950A1

WO2019191950A1 - Earphones noise reduction method and apparatus, master earphone, slave earphone, and earphones noise reduction system

Info

Publication number: WO2019191950A1
Application number: PCT/CN2018/081951
Authority: WO
Inventors: 谢冠宏
Original assignee: 万魔声学科技有限公司
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2019-10-10
Also published as: CN108886647A; CN108886647B

Abstract

The present invention pertains to the technical field of earphones, and in particular, to an earphones noise reduction method and apparatus, a master earphone, a slave earphone, and an earphones noise reduction system. The earphones noise reduction method is applied to the master earphone. The master earphone is wirelessly connected to the slave earphone. The master earphone comprises a first transducer, and the slave earphone comprises a second transducer. The master earphone and/or the slave earphone are wirelessly connected to an audio source device. The earphones noise reduction method comprises: acquiring a first ambient noise signal collected by the first transducer; receiving, based on wireless communications, a second ambient noise signal collected by the second transducer; and generating a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal. The present invention enables noise reduction on wireless earphones and achieves effective noise reduction, thereby enhancing the user experience.

Description

Headphone noise reduction method and device, main earphone, slave earphone and earphone noise reduction system

Technical field

The present invention relates to the field of earphone technology, and in particular, to a method and device for noise reduction of a headphone, a main earphone, a slave earphone and a headphone noise reduction system.

Background technique

With the development of smart wearable device technology, Bluetooth headsets are increasingly sought after by the market. The traditional Bluetooth headset includes a left earphone, a right earphone, and a cable, and the left earphone is connected to the right earphone through a cable. The left or right earphone can communicate with the mobile phone Bluetooth to realize remote playback or transmission of audio files.

In the process of implementing the present application, the applicant found that the conventional technology has at least the following problems: First, since the left earphone and the right earphone are connected by a cable, the cable restricts the degree of freedom of the Bluetooth earphone, thereby causing the user to flexibly use the Bluetooth. headset. Moreover, although the left/right earphones of the conventional Bluetooth earphones are all equipped with a noise reduction function, the noise reduction function is implemented based on the hardware architecture of the conventional Bluetooth earphone. Furthermore, the noise reduction of the traditional Bluetooth headset is only a single-sided noise reduction method, that is, the left earphone collects the ambient noise on the left ear side for noise reduction, and the right earphone collects the ambient noise on the right ear side for noise reduction, due to the left earphone/right The earphones are not able to fully and comprehensively collect the ambient noise on the opposite side, so the effect of single-sided noise reduction is not ideal.

Summary of the invention

An object of the present application is to provide a method and device for reducing noise of a headphone, a main earphone, a slave earphone and a headphone noise reduction system, and the noise reduction effect is good.

To solve the above technical problem, the embodiment of the present application provides the following technical solutions:

In a first aspect, an embodiment of the present application provides a method for reducing noise of a headset, which is applied to a main headset, where the main headset includes a first transducer by wireless connection, and the slave headset includes a second transducer. a transducer, the main earphone and/or the slave earphone being connected to the audio source device by wireless;

The method includes:

Obtaining a first ambient noise signal collected by the first transducer;

Receiving, according to wireless communication, a second ambient noise signal collected by the second transducer;

And generating a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Optionally, the method further includes:

Determining an operating mode of the main earphone;

The first noise cancellation signal is processed according to an operation mode of the main earphone.

Optionally, the main earphone further includes a first speaker; the working mode includes an uplink mode and a downlink mode; the uplink mode is to send a first audio signal to an audio source device, and the downlink mode is to receive from an audio source device Second audio signal;

The processing the first noise cancellation signal according to the working mode of the main earphone comprises:

Transmitting the first noise cancellation signal and the first audio signal to an audio source device; or

Using the first noise cancellation signal to reduce noise in the first audio signal, obtaining a third audio signal, and transmitting the third audio signal to an audio source device; or

Playing the first noise cancellation signal and the second audio signal through the first speaker.

Optionally, the uplink mode includes a call uplink mode, where the downlink mode includes an audio play mode and a call downlink mode.

Optionally, the method further includes:

Transmitting the first ambient noise signal to the slave earphone to cause the slave earphone to generate a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Optionally, the primary headset communicates with the slave headset Bluetooth.

In a second aspect, an embodiment of the present application provides a method for reducing noise of a headset, which is applied to a slave headset, and the slave headset includes a first transducer by wirelessly, the master headset includes a first transducer, and the slave headset includes a second a transducer, the main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is for collecting a first ambient noise signal, and the second transducer is for collecting a second environment Noise signal

The method includes:

Obtaining the second ambient noise signal;

And transmitting, according to the wireless communication, the second ambient noise signal to the main earphone, so that the main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Optionally, the method further includes:

Receiving the first ambient noise signal based on wireless communication;

And generating a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Optionally, the slave headset communicates with the master headset in Bluetooth.

In a third aspect, an embodiment of the present application provides a headphone noise reduction device, which is applied to a main earphone, the main earphone is connected to the earphone by wireless connection, the main earphone includes a first transducer, and the slave earphone includes a second a transducer, the main earphone and/or the slave earphone being connected to the audio source device by wireless;

The device includes:

a first acquiring module, configured to acquire a first ambient noise signal collected by the first transducer;

a first receiving module, configured to receive, according to wireless communication, a second ambient noise signal collected by the second transducer;

a first generating module, configured to generate a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Optionally, the device further includes:

a determining module, configured to determine the working mode of the main headset;

And a processing module, configured to process the first noise cancellation signal according to an operation mode of the main earphone.

The processing module includes:

a first sending unit, configured to send the first noise canceling signal and the first audio signal to an audio source device; or

a second sending unit, configured to reduce noise in the first audio signal by using the first noise cancellation signal, obtain a third audio signal, and send the third audio signal to an audio source device; or

a playing unit, configured to play the first noise cancellation signal and the second audio signal through the first speaker.

Optionally, the device further includes:

a first sending module, configured to send the first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal .

Optionally, the primary headset communicates with the slave headset Bluetooth.

In a fourth aspect, an embodiment of the present application provides a headset noise reduction device, which is applied to a slave headset, and the slave headset wirelessly connects a master headset, the master headset includes a first transducer, and the slave headset includes a second a transducer, the main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is for collecting a first ambient noise signal, and the second transducer is for collecting a second environment Noise signal

The device includes:

a second acquiring module, configured to acquire the second ambient noise signal;

a second sending module, configured to send the second ambient noise signal to the main earphone based on wireless communication, so that the main earphone generates a first according to the first ambient noise signal and the second ambient noise signal A noise cancellation signal.

Optionally, the device further includes:

a second receiving module, configured to receive the first ambient noise signal based on wireless communications;

a second generating module, configured to generate a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In a fifth aspect, an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when When the program instructions are executed by the main headphone, the main headphone is caused to perform the above-described headphone noise reduction method.

In a sixth aspect, an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when When the program instructions are executed from the earphone, the slave earphones perform the above-described earphone noise reduction method.

In a seventh aspect, the embodiment of the present application further provides a non-transitory computer readable storage medium storing computer executable instructions for causing a main headset to execute The earphone noise reduction method as described above.

In an eighth aspect, embodiments of the present application further provide a non-transitory computer readable storage medium storing computer-executable instructions for causing execution from a headset The earphone noise reduction method as described above.

In a ninth aspect, the embodiment of the present application provides a main earphone, including a first transducer, a first wireless communication module, a first audio decoding chip, a first control module, and a first speaker, where the first control module respectively Connecting with the first transducer, the first wireless communication module, the first audio decoding chip, and the first speaker;

The first control module includes:

At least one first processor; and,

a first memory communicatively coupled to the at least one first processor; wherein the first memory stores instructions executable by the at least one first processor, the instructions being processed by the at least one first The apparatus is operative to enable the at least one first processor to perform the headphone noise reduction method of any of the above.

In a tenth aspect, the embodiment of the present application provides a slave earphone, including a second transducer, a second wireless communication module, a second audio decoding chip, a second control module, and a second speaker, where the second control module respectively Connecting with the second transducer, the second wireless communication module, the second audio decoding chip, and the second speaker;

The second control module includes:

At least one second processor;

a second memory communicatively coupled to the at least one second processor; wherein the second memory stores instructions executable by the at least one second processor, the instructions being processed by the at least one second Executing to enable the at least one second processor to perform the headphone noise reduction method of any of the above.

In an eleventh aspect, an embodiment of the present application provides a headphone noise reduction system, including the main earphone and the slave earphone, and the master earphone and the slave earphone are wirelessly connected.

In the earphone noise reduction method and device provided by various embodiments of the present application, the main earphone, the slave earphone and the earphone noise reduction system, the main earphone is connected from the earphone by wireless connection, the main earphone includes a first transducer, and the second earphone includes a second change Energy device. First, the first ambient noise signal collected by the first transducer is acquired. Secondly, based on the wireless communication, receiving the second ambient noise signal collected by the second transducer; and again, generating the first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal. On the one hand, it enables noise reduction on wireless headphones. On the other hand, its noise reduction effect is good, which enhances the user experience.

DRAWINGS

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a headset noise reduction system according to an embodiment of the present application;

2 is another headset noise reduction system according to an embodiment of the present application;

3 is a circuit block diagram of an earphone according to an embodiment of the present application;

Figure 3a is a circuit block diagram of the control module of Figure 3;

Figure 3b is a circuit block diagram of the noise reduction circuit of Figure 3a;

Figure 3c is a block diagram of another circuit principle of the noise reduction circuit of Figure 3a;

4 is a schematic flowchart of a method for communicating a headset according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for reducing noise of a headset according to an embodiment of the present application; FIG.

6 is a schematic flowchart diagram of another method for reducing noise of a headset according to an embodiment of the present application;

FIG. 7 is a schematic flowchart diagram of another method for reducing noise of a headset according to an embodiment of the present application; FIG.

FIG. 7a is a schematic flowchart of a method for reducing noise of a headset according to another embodiment of the present application;

FIG. 7b is a schematic flowchart diagram of a method for reducing noise of a headset according to still another embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for reducing noise of a headset according to an embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for reducing noise of a headset according to another embodiment of the present application; FIG.

FIG. 8b is a schematic diagram of an application scenario of a headset noise reduction according to an embodiment of the present application;

9 is a schematic block diagram of a headphone noise reduction device according to an embodiment of the present application;

FIG. 9a is a schematic block diagram of a headphone noise reduction device according to another embodiment of the present application; FIG.

Figure 9b is a schematic block diagram of the processing module of Figure 9a;

FIG. 9c is a schematic block diagram of a headphone noise reduction device according to still another embodiment of the present application;

FIG. 10 is a schematic block diagram of a headphone noise reduction device according to another embodiment of the present application; FIG.

FIG. 10a is a schematic block diagram of a headphone noise reduction device according to still another embodiment of the present application.

detailed description

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

The earphone provided by the embodiment of the present application is configured to be at least partially capable of being worn in the vicinity of one ear or two ears or in the ear of the user's ears, although the structural shape of the earphone exhibits various changes, however, the embodiment of the present application provides The technical solution can be applied to earphones of any structural shape, such as including in-ear headphones, headphones or over-the-ear headphones.

Although the name of the "headphone" is replaced by another name in other business or technical fields, for example, "headphone" is replaced by "talker" or "hearing aid" or "speaker" or "sound", however, embodiments of the present application provide The technical solution can be applied to any audio device that has the same or the same function as the "headphone" to perform the same type of function.

Any user can use the technical solutions provided by the embodiments of the present application in any suitable working mode based on the technical solutions disclosed in the embodiments of the present application or according to the disclosed technical solutions. For example, based on the technical solution provided by the embodiment of the present application, the main headset can be switched from the earphone to the dual earphone connection mode, the dual earphone disconnect mode, the dual earphone simultaneous use mode, the single earphone use mode, or the analog walkie talk mode, and the like. .

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a headphone noise reduction system according to an embodiment of the present application. As shown in FIG. 1, the earphone noise reduction system 100 includes a first audio source device 12, a main earphone 14 and a slave earphone 16, the main earphone 14 and the slave earphone 12 are wirelessly connected, and the main earphone 14 is also connected to the first audio source device 12. Wireless connections.

The term "wireless connection" as used herein may be any suitable wireless communication connection, such as Bluetooth or the like. In the present embodiment, the main headphone 14 is connected to the slave earphone 16 and the first audio source device 12 by Bluetooth, respectively.

The first audio source device 12 (including the various audio source devices involved below) may be any suitable device having the ability to provide audio content or to play audio data and storage capabilities, such as a smartphone, tablet, MP3 player, personal Computers, laptops, personal stereos, CD players or other smart/non-smart terminals. The first audio source device 12 is coupled to at least one storage medium for storing audio data, which may be a memory within the user terminal device, or may be a storage medium on the Internet, and acquire an audio file from the storage medium. Moreover, the first audio source device 12 can also be a combination of one or more electronic devices, such as a smart phone and an analog to digital converter (DAC) coupled thereto.

In some embodiments, the first audio source device 12 can implement a connection with/from the headset 16 via an internal integrated or external Bluetooth module or Bluetooth chip. When two Bluetooth-enabled devices establish a connection, they get the protocol provided by the corresponding device. Only devices that use the same protocol can exchange data. The first audio source device 12 supports the A2DP and AVRCP protocols, and also supports the following audio coding modes: SBC (Sub Band Coding), MP3, AAC (Advanced Audio Coding), Apt-X, and the like. . Among them, the encoding rate of the SBC encoding format is 44.1 kHz and the maximum is 328 kbit/s, the encoding rate of the AAC encoding format is 320 kbit/s, and the encoding rate of the Apt-X encoding format is 352 kbit/s.

In other embodiments, the first audio source device 12 may also be a local audio device, wherein the local audio device includes a USB interface device and an analog interface device (ADC/SPDIF/I2S). The local audio interface buffers the audio data in the internal RAM of the first audio source device 12 and uses SBC encoding.

In Bluetooth communication, Bluetooth-enabled devices do not need to implement the full Bluetooth specification. In order to support compatibility between different Bluetooth devices, some application layer profiles are defined in the Bluetooth specification to define how a connection or application is implemented between Bluetooth-enabled devices.

Among them, A2DP (Advenced Audio Distribution Profile) belongs to a subset of the above Bluetooth protocol profiles. A protocol stack and method for transferring high quality music file data, A2DP is specifically designed to transmit stereo audio using Bluetooth.

AVRCP (Audio/Video Remote Control Profile), a standard interface for controlling TV, Hi-Fi devices, etc. This profile is used to license a single remote control device (or other device) to control all users. Access to the A/V device.

As shown in FIG. 1, the main headphone 14 is only capable of Bluetooth connection to a first audio source device 12. And, when the main earphone 14 is Bluetooth connected from the earphone 16, the main earphone 14 receives and plays the audio signal transmitted by the first audio source device 12, and the main earphone 14 also forwards the audio signal to the slave earphone 16, which plays the audio from the earphone 16. Signal to achieve dual stereo. When the main headphone 14 is not Bluetooth-connected from the headphone 16, the main headphone 14 plays an audio signal, thereby achieving a single stereo.

In some embodiments, the audio signal transmitted by the first audio source device 12 to the main earphone 14 can also be detected from the earphone 16 and the audio signal can be played.

As described above, since the main headphone 14 and the slave headphone 16 are wirelessly connected, which greatly expands the degree of freedom of the master/slave headphone, the user can use the master/slave headphone more flexibly and realize true wireless stereo (True Wireless Stereo) , TWS) effect.

It is worth reminding that the roles of the main earphone 14 and the slave earphone 16 are not fixed. For different audio source devices, the roles of the two can be interchanged. For example, please refer to FIG. 2. FIG. 2 is a schematic diagram of another earphone noise reduction system according to an embodiment of the present application. As shown in FIG. 2, the headphone noise reduction system 100 further includes a second audio source device 18 that is Bluetooth connected to the slave headset 16.

For the first audio source device 12, the "main earphone 14" is the master earphone, and the "slave earphone 16" is the slave earphone. For the second audio source device 18, "from the earphone 16" is the primary earphone, and the "main earphone 14" is the secondary earphone.

In the various embodiments described above, the headphone noise reduction system 100 can operate in the TWS mode of operation. In the TWS mode, a single earphone can connect up to one audio source device, and a group of TWS sessions can connect up to two audio source devices.

The embodiment of the present application further elaborates on the TWS session:

1. Complete the pairing. Prior to entering the TWS session, the first audio source device 12 is Bluetooth paired with the primary headset 14, and the second audio source device 18 is paired with the secondary headset 16 Bluetooth.

2. Establish a TWS session. The first audio source device 12 establishes a TWS session with the primary headset 14, and the second audio source device 18 establishes a TWS session with the secondary headset 16.

3. Play audio. After the TWS session is successfully established, when the first audio source device 12 plays the audio signal, the main earphone 14 receives the first audio signal and forwards the first audio signal to the slave earphone 16. When the second audio source device 18 plays the second audio signal, the second audio signal is received from the earphone 16 and the second audio signal is forwarded to the main earphone 14.

To illustrate the TWS session process, those skilled in the art can complete the TWS session process described above by any suitable headset circuitry.

Referring to FIG. 3, the earphone 300 includes a transducer 31, a wireless communication module 32, a control module 33, an audio decoding chip 34, and a speaker 35. The control module 33 is respectively coupled to the transducer 31, the wireless communication module 32, and the audio decoding chip 34. The speaker 35 is connected.

The transducer 31 is used to collect an environmental noise signal or an audio signal, which may be sent by the user or may be sent by other audio source devices. The transducer 31 can be disposed at a suitable location external to the housing of the earphone 300. The transducer 31 can be any suitable acoustically-electrically transducing device, such as a microphone.

The wireless communication module 32 is for wirelessly connecting with an audio source device or a master/slave headset, and the wireless communication module 32 receives an audio signal transmitted by the audio source device or the master/slave headset. The wireless communication module 32 can be a short range communication technology such as Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), or ZigBee.

The control module 33 serves as a control core of the earphone 300, and the control module 33 cooperates with other devices to perform various functions of the earphone 300. For example, the control module 33 receives the audio signal collected by the transducer 31 and transmits it to the audio source device via the wireless communication module 32. For another example, the wireless communication module 32 receives the audio signal transmitted by the audio source device, and is sent to the audio decoding chip 34 under the control of the control module 33. The audio decoding chip 34 decodes the audio signal, and the control module 33 decodes the audio signal. The audio signal is played through the speaker 35. For another example, the control module 33 receives the ambient noise signal collected by the transducer 31, and generates a noise cancellation signal having the same amplitude and opposite phase as the ambient noise signal according to the ambient noise signal to reduce the interference of the environmental noise.

In some embodiments, the wireless communication module 32, the control module 33, and the audio decoding chip 34 may be packaged on the same integrated chip, and no restrictions are imposed on the circuit structures of the wireless communication module 32, the control module 33, and the audio decoding chip 34. .

Here, when the earphone 300 is a master/slave earphone, correspondingly, the transducer 31 is a first/second transducer, the wireless communication module 32 is a first/second wireless communication module, and the control module 33 is a A/second control module, the audio decoding chip 34 is a first/second audio decoding chip, and the speaker 35 is a first/second speaker.

When the earphone 300 needs to implement an active noise reduction function, a noise reduction circuit can be configured to implement active noise reduction of the earphone.

Referring to FIG. 3a, the control module 33 includes a processor 331, a memory 332, and a noise reduction circuit 333.

The processor 331 is connected to the memory 332 and the noise reduction circuit 333, respectively. The processor 331 can be implemented by using at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field Programming gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and other electronic units that perform these functions.

In this embodiment, the number of the processors 331 may be one or plural.

Memory 332 includes high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 332 can optionally include a memory remotely located relative to processor 331 that can be connected to the headset over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The memory 332 is used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/units corresponding to the earphone noise reduction methods/devices referred to herein. The processor 331 performs various functional applications of the earphones and data processing by running non-volatile software programs, instructions, and units stored in the memory 332, that is, implementing the above-described method embodiment earphone noise reduction method/device.

The noise reduction circuit 333 is connected to the transducer 31 and the speaker 35, respectively. The noise reduction circuit 36 receives the environmental noise signal collected by the transducer 31, and performs noise reduction processing on the environmental noise signal under the control of the processor 331 to output a noise cancellation signal.

Referring to FIG. 3b, the noise reduction circuit 333 includes a first ADC converter 33a, a sample rate converter 33b, a signal processor 33c, and an adder 33d.

The first ADC converter 33a is for converting the environmental noise signal into a digital signal, the sampling rate converter 33b samples the digital signal according to a preset sampling rate, and the signal processor 33c filters and processes the sampled digital signal, and at the adder 33d The desired audio signal and the sampled digital signal are superimposed and played through the speaker 35.

In some embodiments, in order to avoid the noise reduction delay and improve the noise reduction effect, it is possible to reduce the delay by increasing the sampling rate of the sample rate converter 33b. For example, the user can configure a high sampling rate in the memory 332 in advance, the processor 331 accesses the memory 332, retrieves data of a high sampling rate, and configures the sampling rate converter 33b so that the sampling rate converter 33b can increase the sampling rate.

In some embodiments, in order to avoid the noise reduction delay and improve the noise reduction effect, it is also possible to reduce the delay by modifying the filter parameters of the signal processor 33c.

In other embodiments, in order to improve the reliability and stability of noise reduction, a noise reduction feedback circuit may also be configured to implement feedback of the noise reduction process. Referring to FIG. 3c, the noise reduction circuit 333 further includes a second ADC converter 33e and a compression controller 33f.

The second ADC converter 33e is for collecting a noise canceling signal or an audio signal that is pushed to the speaker 35, and converting the noise canceling signal or the audio signal into a digital signal.

The compression controller 33f is configured to detect whether the amplitude of the digital signal is greater than a preset value and an abnormal condition such as clipping occurs. When detecting that the amplitude of the digital signal is greater than a preset value, clipping occurs, and the compression controller 33f reduces the signal. The amplitude of the audio data output by the processor 33c.

When noise reduction is achieved, the left/right sides of the traditional Bluetooth headset each require two microphones to reduce noise. However, in the earphones provided in the above various embodiments, each side earphone requires only one microphone to complete the noise reduction, thereby greatly reducing the cost of the earphone.

In addition to the noise reduction circuit structure as described herein, those skilled in the art may also evolve other alternative noise reduction circuits according to the technical solutions disclosed herein, and variations or substitutions thereof are intended to fall within the scope of the present application. I will not repeat them here.

For earphone noise reduction, a headphone noise reduction method is provided herein as an example to elaborate the earphone noise reduction process, but the example is not intended to limit the scope of protection of the present application.

Please refer to FIG. 4. FIG. 4 is a schematic flowchart diagram of a method for communicating a headset according to an embodiment of the present application. As shown in FIG. 4, the headset communication method 400 includes:

41. The audio source device sends the first connection information and the audio signal to the first earphone;

In this embodiment, the first earphone establishes a Bluetooth connection with the audio source device according to the first connection information, and at this time, the first earphone functions as the primary earphone. The first connection information includes a Bluetooth protocol, device control information, and the like, and the audio signal includes music data or call data.

42. The first earphone sends the second connection information to the audio source device to maintain the primary connection and related communication;

43. The first earphone sends third connection information and the audio signal to the second earphone;

In this embodiment, the second earphone establishes a Bluetooth connection with the first earphone according to the third connection information, and at this time, the second earphone acts as the slave earphone. The second connection information includes a Bluetooth protocol, device control information, and the like.

44. The second earphone sends fourth connection information to the first earphone.

In this embodiment, the fourth connection information includes a Bluetooth protocol, device control information, and the like.

At this point, the primary headset establishes a communication connection with the secondary headset.

Based on the communication architecture between the master/slave headsets, the embodiment of the present application provides a headset noise reduction method that works in an uplink mode. The uplink mode sends an audio signal to the audio source device for the main earphone, wherein the uplink mode includes a call uplink mode. Referring to FIG. 5, the earphone noise reduction method 500 includes:

51. The main earphone acquires a first ambient noise signal collected by the first transducer;

52. Acquire a second ambient noise signal collected by the second transducer from the earphone;

53. Send a second ambient noise signal and an audio signal from the earphone to the main earphone;

In this embodiment, the audio signal may be an audio signal obtained from the earphone from other audio source devices, or may be an audio signal stored locally from the earphone, and may be a voice signal collected by the second transducer.

Since the first transducer and the second transducer are respectively located at the left and right ears, the distance is sufficiently far, the characteristics of the environmental noise can be better obtained, and it is not easily affected by the earphone housing.

54. The main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal;

55. The main earphone processes the first noise cancellation signal according to the uplink mode.

In this embodiment, in one aspect, the main earphone may send the first noise cancellation signal and the first audio signal to the audio source device, so that the audio source device reduces noise in the first audio signal according to the first noise cancellation signal, thereby avoiding the main earphone. Make calculations to save power on the main headphones and reduce the workload. On the other hand, the main earphone can use the first noise canceling signal to reduce the noise in the first audio signal, obtain the third audio signal, and send the third audio signal to the audio source device, so that the audio source device can directly hear the clear audio. signal. Here, the first audio signal may be an audio signal collected by the main earphone or a locally acquired audio signal, or may be an audio signal collected from the earphone or a locally acquired audio signal, or may be an audio signal collected by the superimposed master/slave earphone. Or locally acquired audio signal.

In some embodiments, the main earphone may further transmit a first ambient noise signal to the slave earphone, and the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In summary, in the uplink mode, the voice of the audio source device is more clear through the noise reduction of the master/slave headset.

On the other hand, based on the communication architecture between the master/slave headphones, the embodiment of the present application provides a method for reducing noise of the earphone operating in the downlink mode. The downlink mode receives the second audio signal from the audio source device, wherein the downlink mode includes an audio play mode and a call downlink mode. Referring to FIG. 6, the earphone noise reduction method 600 includes:

61. The main earphone receives a second audio signal transmitted by the audio source device.

In this embodiment, the second audio signal includes music data or call data.

62. The main earphone acquires a first ambient noise signal collected by the first transducer;

63. Acquire a second ambient noise signal collected by the second transducer from the earphone;

64. Send a second ambient noise signal from the earphone to the main earphone;

65. The main earphone sends the first ambient noise signal and the second audio signal to the slave earphone;

66. The main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal;

67. The main earphone processes the first noise cancellation signal according to the downlink mode;

In this embodiment, the main earphone plays the first noise canceling signal and the second audio signal through the first speaker.

68. Generate, from the earphone, a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal;

In this embodiment, the second noise canceling signal and the second audio signal are played from the earphone through the second speaker.

In summary, in the downlink mode, the sound of the near-end of the earphone is clearer by the noise reduction effect of the master/slave headphones.

On the other hand, based on the communication architecture between the master/slave headphones, the embodiment of the present application provides a method for reducing noise of the earphone. Referring to FIG. 7, the earphone noise reduction method 700 includes:

71. Acquire a first ambient noise signal collected by the first transducer;

In this embodiment, the main earphone can also receive the audio signal sent by the audio source device, or the audio signal captured from the local device, or receive the audio signal forwarded from the earphone.

72. Receive, according to wireless communication, a second ambient noise signal collected by the second transducer;

73. Generate a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Thus, in one aspect, the headphone noise reduction method 700 is capable of achieving noise reduction on a wireless headset. On the other hand, the headphone noise reduction method 700 has a good noise reduction effect, thereby improving the user experience.

In some embodiments, since the earphones have multiple working modes, correspondingly, the earphones can also match different noise reduction modes in different working modes in order to meet the needs of the user in different earphone working modes.

Referring to FIG. 7a, the earphone noise reduction method 700 further includes:

74. Determine a working mode of the main earphone;

75. Process the first noise cancellation signal according to the working mode of the main earphone.

In this embodiment, the working mode includes an uplink mode and a downlink mode, the uplink mode is to send the first audio signal to the audio source device, and the downlink mode is to receive the second audio signal from the audio source device. In the process of processing the first noise cancellation signal, the main earphone may send the first noise cancellation signal and the first audio signal to the audio source device, or reduce the first audio signal by using the first noise cancellation signal. Noise, obtaining a third audio signal, and transmitting the third audio signal to the audio source device, for example, the main earphone will operate the received first ambient noise signal, the audio signal, and the second ambient noise signal and the audio signal transmitted from the earphone, Each audio signal is extracted and cancels the surrounding ambient noise signal. At the same time, the main earphone also performs beam forming on the vertical direction of the first transducer to enhance the vertical direction of the first transducer. On the other hand, the main earphone can also play the first noise canceling signal and the second audio signal through the first speaker.

In some embodiments, the uplink mode includes a call uplink mode, and the downlink mode includes an audio play mode and a call downlink mode. For example, the call uplink mode is to upload the call data to the mobile phone, and the call downlink mode is that the mobile phone broadcasts the call data to the main earphone, and the audio play mode is that the mobile phone transmits the music to the main earphone.

In each of the above embodiments, not only the main headphone can actively perform ambient noise, but also active noise reduction can be realized from the earphone.

Referring to FIG. 7b, the earphone noise reduction method 700 further includes:

76. Send a first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Therefore, the sound from the headphone side is clearer.

As another aspect of the embodiments of the present application, an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising a program And instructing the main earphone to perform the above-described earphone noise reduction method when the program instruction is executed by the main earphone.

As another aspect of the embodiments of the present application, the embodiment of the present application further provides a non-transitory computer readable storage medium, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions are used The main earphone is caused to perform the earphone noise reduction method as described above.

On the other hand, based on the communication architecture between the master/slave headphones, the embodiment of the present application provides another method for reducing noise of the earphone. Referring to FIG. 8, the earphone noise reduction method 800 includes:

81. Acquire a second environmental noise signal;

82. The second ambient noise signal is sent to the main earphone based on the wireless communication, so that the main earphone generates the first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

In the embodiment, the main earphone can realize active noise reduction by assisting from the earphone, and improve the sound clarity of the main earphone end.

It is worth noting that in the various embodiments described above, the roles between the "master headset" and the "slave headset" are relative. For example, the first earphone is connected to the first audio source device, the second earphone is connected to the first earphone, and the second earphone is connected to the second audio source device. For the first audio source device, the first earphone is “ The main earphone", the second earphone is "from the earphone". For the second audio source device, the first earphone is "slave earphone" and the second earphone is "main earphone".

Referring to FIG. 8a, the earphone noise reduction method 800 further includes:

83. Receive a first environmental noise signal based on wireless communication;

84. Generate a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.

Therefore, the sound from the headphone side is clearer.

It should be noted that, in the foregoing embodiments, the foregoing steps are not necessarily in a certain order, and those skilled in the art can understand the description of the embodiments of the present application. There may be different execution sequences, that is, they may be executed in parallel, or may be exchanged for execution, and the like.

As another aspect of the embodiments of the present application, an embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising a program And instructing, when the program instruction is executed from the earphone, the slave earphone noise reduction method to be performed.

As another aspect of the embodiments of the present application, the embodiment of the present application further provides a non-transitory computer readable storage medium, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions are used The earphone noise reduction method as described above is performed from the earphone.

To further illustrate the embodiments of the present application, the embodiments of the present application provide a schematic diagram of a headset noise reduction application scenario. Referring to FIG. 8b, the audio source device is a mobile phone 801, the first earphone 802 is a main earphone, and the second earphone 803 is a slave earphone.

The mobile phone 801 transmits the connection information A and the downlink call data to the first earphone 802, and the first earphone 802 transmits the connection information B to the mobile phone 801, so that the mobile phone 801 establishes Bluetooth communication with the first earphone 802. The first earphone 802 transmits the connection information C to the second earphone 803, the second earphone 803 transmits the connection information D to the first earphone 802, and the first earphone 802 establishes Bluetooth communication with the second earphone 803.

In the down mode. The first microphone M1 of the first earphone 801 collects the first ambient noise signal MIC1, and the first earphone 802 sends the downlink call data and the first ambient noise signal MIC1 to the second earphone 803 to the second earphone 803. At the same time, the second microphone M2 of the second earphone 803 collects the second ambient noise signal MIC2 and transmits the second ambient noise signal MIC2 to the first earphone 802. On the one hand, the first earphone 802 is based on the first ambient noise signal MIC1. The first noise canceling signal ANC1 is generated with the second ambient noise signal MIC2, and the second earphone 803 generates the first noise canceling signal ANC2 according to the first ambient noise signal MIC1 and the second ambient noise signal MIC2. On the other hand, the first earphone 802 plays the downlink call data A, and the second earphone 803 plays the downlink call data B.

In the up mode. The first microphone M1 collects the first ambient noise signal MIC1 and the audio signal A from the user's mouth 804, and the second microphone M2 collects the second ambient noise signal MIC2 and the audio signal B from the user's mouth 804. The second earphone 803 sends the second ambient noise signal MIC2 and the audio signal B to the first earphone 802, and the first earphone 802 operates the first environmental noise signal MIC1, the audio signal A, the second environmental noise signal MIC2, and the audio signal B. The audio signal A and the audio signal B are extracted as uplink call data, and beam forming is performed on the vertical direction of each microphone to enhance the vertical direction of the microphone. And, the first earphone 802 generates a noise cancellation signal to cancel the first environmental noise signal MIC1 and the second environmental noise signal MIC2 to transmit the clear and clear audio signal to the mobile phone 801.

In some embodiments, the first earphone 802 can also send the first ambient noise signal MIC1 and the audio signal A to the second earphone 803, and the second earphone 803 sets the first ambient noise signal MIC1, the audio signal A, and the second ambient noise. The signal MIC2 and the audio signal B are operated, and the audio signal A and the audio signal B are extracted as uplink call data, and beam forming is performed on the vertical direction of each microphone to enhance the vertical direction of the microphone. Moreover, the second earphone 803 generates a noise cancellation signal to cancel the first environmental noise signal MIC1 and the second environmental noise signal MIC2, and sends the denoised audio signal to the first earphone 802, and the first earphone 802 is denoised again. The audio signal is sent to the handset 801 so that the handset 801 can hear a clear and clear audio signal.

Through the above various embodiments, those skilled in the art should understand that the noise cancellation signal may be formed in any one of the above bodies (the audio source device, the first earphone, and the second earphone), and no limitation is imposed on the manner in which the noise cancellation signal is formed. .

As another aspect of the embodiments of the present application, an embodiment of the present application provides a headphone noise reduction device, which is applied to a main earphone, the main earphone is connected from the earphone through a wireless connection, the main earphone includes a first transducer, and the second earphone includes a second switch. Energy device.

In the present embodiment, the earphone noise reduction device acts as a software system, which is stored in the memory set forth in Figure 3a. The earphone noise reduction device includes a plurality of instructions stored in a memory, and the processor can access the memory and call the instruction to execute to complete the above-mentioned earphone noise reduction control logic.

Referring to FIG. 9 , the earphone noise reduction device 900 includes a first acquisition module 91 , a first receiving module 92 , and a first generation module 93 .

The first obtaining module 91 is configured to acquire a first ambient noise signal collected by the first transducer.

The first receiving module 92 is configured to receive a second ambient noise signal collected by the second transducer based on the wireless communication.

The first generating module 93 is configured to generate a first noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In summary, on the one hand, it can achieve noise reduction on wireless headphones. On the other hand, its noise reduction effect is good, which enhances the user experience.

Referring to FIG. 9a, the earphone noise reduction device 900 further includes a determination module 94 and a processing module 95.

The determination module 94 is for determining the primary headset operating mode.

The processing module 95 is configured to process the first noise cancellation signal according to an operation mode of the main earphone.

In some embodiments, the primary headset further includes a first speaker; the operational mode includes an uplink mode and a downlink mode; the uplink mode is to transmit the first audio signal to the audio source device, and the downlink mode is to receive the second audio signal from the audio source device.

Referring to FIG. 9b, the processing module 95 includes a first sending unit 951, a second sending unit 952, and a playing unit 953.

The first sending unit 951 is configured to send the first noise canceling signal and the first audio signal to the audio source device; or

The second sending unit 952 is configured to reduce noise in the first audio signal by using the first noise cancellation signal, obtain a third audio signal, and send the third audio signal to the audio source device; or

The playing unit 953 is configured to play the first noise canceling signal and the second audio signal through the first speaker.

In some embodiments, the uplink mode includes a call uplink mode, and the downlink mode includes an audio play mode and a call downlink mode.

Referring to FIG. 9c, the earphone noise reduction device 900 further includes a first transmitting module 96.

The first sending module 96 is configured to send a first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In some embodiments, the primary headset communicates with the headset Bluetooth.

It should be noted that the earphone noise reduction device can perform the earphone noise reduction method provided by the embodiment of the present application, and has a function module and a beneficial effect corresponding to the execution method. For the technical details that are not described in detail in the embodiment of the earphone noise reduction device, refer to the earphone noise reduction method provided by the embodiment of the present application.

As another aspect of the embodiment of the present application, an embodiment of the present application provides a headphone noise reduction device, which is applied to wirelessly connect a main earphone from an earphone, and the main earphone includes a first transducer, and the second earphone includes a second switch. The first transducer is configured to acquire a first ambient noise signal, and the second transducer is configured to acquire a second ambient noise signal.

In the present embodiment, the earphone noise reduction device acts as a software system that is stored in the memory set forth in Figure 3a. The earphone noise reduction device includes a plurality of instructions stored in a memory, and the processor can access the memory and call the instruction to execute to complete the above-mentioned earphone noise reduction control logic.

Referring to FIG. 10, the earphone noise reduction device 1000 includes a second acquisition module 1001 and a second transmission module 1002.

The second obtaining module 1001 is configured to acquire a second ambient noise signal.

The second sending module 1002 is configured to send a second ambient noise signal to the main earphone based on the wireless communication, so that the main earphone generates the first noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In some embodiments, referring to FIG. 10a, the earphone noise reduction device 1000 further includes: a second receiving module 1003 and a second generating module 1004.

The second receiving module 1003 is configured to receive the first ambient noise signal based on the wireless communication.

The second generating module 1004 is configured to generate a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.

In some embodiments, Bluetooth is communicated from the headset to the primary headset.

Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software plus a general hardware platform, and of course, by hardware. A person skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims

An earphone noise reduction method is applied to a main earphone, wherein the main earphone is connected to the earphone by wireless connection, the main earphone includes a first transducer, and the slave earphone comprises a second transducer, The main earphone and/or the slave earphone are connected to the audio source device by wireless;

The method includes:

Obtaining a first ambient noise signal collected by the first transducer;

Receiving, according to wireless communication, a second ambient noise signal collected by the second transducer;

And generating a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
The method of claim 1 further comprising:

Determining an operating mode of the main earphone;

The first noise cancellation signal is processed according to an operation mode of the main earphone.
The method according to claim 2, wherein the main earphone further comprises a first speaker; the working mode comprises an uplink mode and a downlink mode; and the uplink mode is to send the first audio signal to the audio source device, The downlink mode is that the second audio signal is received from the audio source device;

The processing the first noise cancellation signal according to the working mode of the main earphone comprises:

Transmitting the first noise cancellation signal and the first audio signal to an audio source device; or

Using the first noise cancellation signal to reduce noise in the first audio signal, obtaining a third audio signal, and transmitting the third audio signal to an audio source device; or

Playing the first noise cancellation signal and the second audio signal through the first speaker.
The method according to claim 2 or 3, wherein the uplink mode comprises a call uplink mode, and the downlink mode comprises an audio play mode and a call downlink mode.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Transmitting the first ambient noise signal to the slave earphone to cause the slave earphone to generate a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
The method according to any one of claims 1 to 3, wherein the main earphone is in Bluetooth communication with the slave earphone.
An earphone noise reduction method is applied to a slave earphone, wherein the slave earphone comprises a first earphone by wirelessly connecting, the master earphone comprises a first transducer, and the slave earphone comprises a second transducer, The main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is configured to collect a first ambient noise signal, and the second transducer is configured to acquire a second ambient noise signal;

The method includes:

Obtaining the second ambient noise signal;

And transmitting, according to the wireless communication, the second ambient noise signal to the main earphone, so that the main earphone generates a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
The method of claim 7, wherein the method further comprises:

Receiving the first ambient noise signal based on wireless communication;

And generating a second noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
The method according to claim 7 or 8, wherein said slave earphone is in Bluetooth communication with said master earphone.
An earphone noise reduction device is applied to a main earphone, wherein the main earphone is connected to the earphone by wireless connection, the main earphone includes a first transducer, and the slave earphone comprises a second transducer, The main earphone and/or the slave earphone are connected to the audio source device by wireless;

The device includes:

a first acquiring module, configured to acquire a first ambient noise signal collected by the first transducer;

a first receiving module, configured to receive, according to wireless communication, a second ambient noise signal collected by the second transducer;

a first generating module, configured to generate a first noise cancellation signal according to the first ambient noise signal and the second ambient noise signal.
The device according to claim 10, wherein the device further comprises:

a determining module, configured to determine the working mode of the main headset;

And a processing module, configured to process the first noise cancellation signal according to an operation mode of the main earphone.
The device according to claim 10, wherein the main earphone further comprises a first speaker; the working mode comprises an uplink mode and a downlink mode; and the uplink mode is to send the first audio signal to the audio source device, The downlink mode is that the second audio signal is received from the audio source device;

The processing module includes:

a first sending unit, configured to send the first noise cancellation signal and the first audio signal to an audio source device; or

a second sending unit, configured to reduce noise in the first audio signal by using the first noise cancellation signal, obtain a third audio signal, and send the third audio signal to an audio source device; or

a playing unit, configured to play the first noise cancellation signal and the second audio signal through the first speaker.
The device according to claim 11 or 12, wherein the uplink mode comprises a call uplink mode, and the downlink mode comprises an audio play mode and a call downlink mode.
The device according to any one of claims 10 to 12, wherein the device further comprises:

a first sending module, configured to send the first ambient noise signal to the slave earphone, so that the slave earphone generates a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal .
The apparatus according to any one of claims 10 to 12, wherein the main earphone is in Bluetooth communication with the slave earphone.
An earphone noise reduction device is applied to a slave earphone, wherein the slave earphone comprises a first earphone by wirelessly, the master earphone comprises a first transducer, and the slave earphone comprises a second transducer, The main earphone and/or the slave earphone are connected to the audio source device by wireless, the first transducer is configured to collect a first ambient noise signal, and the second transducer is configured to acquire a second ambient noise signal;

The device includes:

a second acquiring module, configured to acquire the second ambient noise signal;

a second sending module, configured to send the second ambient noise signal to the main earphone based on wireless communication, so that the main earphone generates a first according to the first ambient noise signal and the second ambient noise signal A noise cancellation signal.
The device according to claim 16, wherein the device further comprises:

a second receiving module, configured to receive the first ambient noise signal based on wireless communications;

a second generating module, configured to generate a second noise canceling signal according to the first ambient noise signal and the second ambient noise signal.
The apparatus according to claim 16 or 17, wherein said slave earphone is in Bluetooth communication with said master earphone.
A main earphone, comprising: a first transducer, a first wireless communication module, a first audio decoding chip, a first control module, and a first speaker, wherein the first control module and the first switch respectively The first wireless communication module, the first audio decoding chip, and the first speaker are connected;

The first control module includes:

At least one first processor; and,

a first memory communicatively coupled to the at least one first processor; wherein the first memory stores instructions executable by the at least one first processor, the instructions being processed by the at least one first The apparatus is operative to enable the at least one first processor to perform the headphone noise reduction method of any one of claims 1 to 6.
A slave earphone, comprising: a second transducer, a second wireless communication module, a second audio decoding chip, a second control module, and a second speaker, wherein the second control module and the second switch respectively The second wireless communication module, the second audio decoding chip, and the second speaker are connected;

The second control module includes:

At least one second processor;

a second memory communicatively coupled to the at least one second processor; wherein the second memory stores instructions executable by the at least one second processor, the instructions being processed by the at least one second The apparatus is operative to enable the at least one second processor to perform the headphone noise reduction method of any one of claims 7 to 9.
A headphone noise reduction system, comprising the main earphone of claim 19 and the slave earphone of claim 20, the main earphone being wirelessly connected to the slave earphone.