CN113746975A

CN113746975A - Method for counteracting sound leakage and electronic equipment

Info

Publication number: CN113746975A
Application number: CN202010476894.7A
Authority: CN
Inventors: 张宁; 郭李; 张雨果; 朱统; 苏杰; 李英明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-12-03
Also published as: WO2021238354A1

Abstract

The application discloses a method for counteracting sound leakage and electronic equipment, which can counteract sound leakage of an earphone of the electronic equipment and reduce leakage of voice communication contents, so that privacy safety of a user can be protected. The first electronic equipment comprising an earphone and a loudspeaker can play a first sound signal through the earphone and play a second sound signal through the loudspeaker; the second sound signal is in phase opposition to the first sound signal. The method can be applied to the process that the electronic equipment plays the sound signals through the receiver.

Description

Method for counteracting sound leakage and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of audio, in particular to a method for counteracting leakage sound and electronic equipment.

Background

Voice communication is an important function of electronic devices, such as mobile phones. In the process of the electronic device interacting with other devices and providing voice communication function for users, a receiver (also referred to as "receiver") of the electronic device can convert an audio electrical signal from other devices into a sound signal and output (i.e., play) the sound signal.

However, in the process of outputting the sound signal, a problem of the sound leakage of the earphone may occur. The leakage of the earphone may cause the voice communication content to be heard by surrounding people, so that the leakage of the user privacy occurs, and the privacy security of the user is affected.

Disclosure of Invention

The application provides a method for counteracting sound leakage and electronic equipment, which can counteract sound leakage of an earphone of the electronic equipment and reduce leakage of voice communication contents, so that privacy safety of a user can be protected.

In a first aspect, the present application provides a method of canceling a leakage sound, which may be applied to a first electronic device including an earpiece and a speaker. The method can comprise the following steps: the first electronic equipment plays a first sound signal through a receiver; and playing the second sound signal through the loudspeaker.

Wherein the second sound signal is opposite in phase to the first sound signal. It is understood that for a sound wave (i.e., a sound signal), the phase is the position of the sound wave in its waveform at a certain moment (e.g., a peak, a trough, or a point between a peak and a trough). Phase may be considered a scale of points at which the sound wave is at a peak, trough, or between a peak and trough at a certain time. For example, at a certain time, when the first sound signal is at a peak, the second sound signal is at a trough; when the first sound signal is at the wave valley, the second sound signal is at the wave peak.

Moreover, if the parameters such as amplitude, frequency and the like at the same time are the same, the two sound waves (i.e. sound signals) with different sound sources have opposite phases; then, the two sound waves can cancel each other out during propagation.

Therefore, the method and the device can counteract the sound leakage of the receiver of the electronic equipment, reduce the leakage of the voice communication content and protect the privacy safety of users.

In a possible design manner of the first aspect, the second sound signal has an opposite phase to the first sound signal, and specifically includes: the second sound signal is out of phase with the first sound signal by [180 ° -p, 180 ° + p ]. Wherein p is greater than or equal to 0 ° and is less than a preset angle threshold. That is, p may be 0 °, or any value close to 0 ° such as 1 °, 2 °, 3 °, or the like. Wherein, when p is 0 °, the phase difference between the second sound signal and the first sound signal is 180 °. Therefore, the closer p is to 0 degree, the better the effect of counteracting the sound leakage of the receiver of the electronic equipment is in the scheme.

In a possible design of the first aspect, the earphone is disposed near a top of the first electronic device, and the speaker is disposed at a bottom of the first electronic device. The positions of the receivers and the loudspeaker on the first electronic equipment are set, so that the sound leakage of the receivers in a preset area around the first electronic equipment can be counteracted, the leakage of voice communication content is reduced, and the privacy safety of a user can be protected.

In another possible design manner of the first aspect, the second sound signal is opposite in phase to the first sound signal, and is used for canceling sound leakage of the earphone in a preset area around the first electronic device.

Wherein, the preset area may include: and an area on or near the first straight line, the distance from the first point being greater than or equal to a preset distance. The first point is the midpoint of a connecting line between the position of the receiver and the position of the loudspeaker. The first straight line is perpendicular to the connecting line and passes through the first point.

Generally, when the ears of the other users are close to the first electronic device (e.g., the distance between the ears of the other users and the first electronic device is less than the preset distance), the other users can hear the first sound signal played by the first electronic device through the earphone. The preset area comprises an area where the other user is located when the ear of the other user is close to the first electronic device. Therefore, in the embodiment of the application, the first electronic device plays the first sound signal through the earphone, and simultaneously plays the second sound signal with the phase opposite to that of the first sound signal through the loudspeaker, so that the sound leakage of the earphone in the preset area around the first electronic device of the mobile phone can be counteracted. Therefore, the leakage of voice communication content can be reduced, and the privacy and the safety of the user can be protected.

In another possible design manner of the first aspect, the second sound signal is opposite in phase to the first sound signal, and is used for canceling a leakage sound of a preset frequency played by the earphone. Wherein the frequency range of the human voice is approximately 100 hertz (Hz) -10 kilohertz (KHz). According to the scheme, the effect of canceling the leakage sound at different frequencies is different, and the effect of canceling the leakage sound at the preset frequency is the best.

In another possible design manner of the first aspect, the preset frequency may include: 100Hz-1 KHz.

It should be noted that, although the method according to the embodiment of the present application is used, only the leakage sound of the partial frequency played by the earphone can be cancelled, or only a good cancellation effect can be generated for the leakage sound of the partial frequency played by the earphone. However, as long as part of the frequencies played by the earphone can be cancelled, the cancelled leakage sound of the part of the frequencies cannot be propagated to the ears of other users and cannot be heard by the other users. In this way, even if other users hear the leakage sound of another part of frequencies, the content of the voice communication cannot be known according to the leakage sound of the other part of frequencies, so that the privacy security of the users can be protected.

In another possible design manner of the first aspect, the playing, by the first electronic device, the first sound signal through an earphone may include: the first electronic equipment plays a first sound signal from the second electronic equipment through the earphone in a preset voice communication state.

Wherein, the preset voice communication state is as follows: the first electronic equipment is held by a user and carries out voice communication with the second electronic equipment through a telephone application or an instant messaging application; or the first electronic equipment is held by the user, the first electronic equipment is close to the ear of the user, and the first electronic equipment and the second electronic equipment are in a voice communication state through the telephone application or the instant messaging application.

In another possible design manner of the first aspect, the first electronic device further includes a main Microphone (MIC). Although in the above method, the second sound signal is played through the speaker 102, the sound leakage of the earphone can be counteracted; however, the primary MIC of the first electronic device (e.g., a cell phone) is closer to the speaker. A second sound signal played by the speaker may be picked up (or picked up) by the MIC. In this case, the second sound signal may be mixed with the sound signal transmitted from the first electronic device to the second electronic device. Thus, the voice communication quality of the user is affected.

Based on this, the above method may further include: the first electronic equipment adopts a second sound signal to counteract interference signals from a loudspeaker in sound signals collected by the main MIC; alternatively, the first electronic device cancels an interference signal from the speaker out of the sound signal collected by the main MIC using an Adaptive Echo Cancellation (AEC) principle.

In another possible design of the first aspect, the first electronic device may receive the voice message from the second electronic device through an instant messaging application (also referred to as a chat application) of a third party. The first electronic device may then display a chat interface of the instant messaging application that includes the voice message from the second electronic device. In response to the click operation of the user on the voice message, the first electronic device is held by the user, and when the first electronic device is close to the ear of the user, the first electronic device can play the first sound signal through the earphone.

In a second aspect, the present application provides an electronic device, which is a first electronic device, comprising: a processor, an earpiece, and a speaker. The processor is used for transmitting the first sound signal to the earphone and transmitting the second sound signal to the loudspeaker. The second sound signal is in phase opposition to the first sound signal. The earphone is used for playing the first sound signal. And the loudspeaker is used for playing the second sound signal.

In a possible design of the second aspect, the earphone is disposed near a top of the first electronic device, and the speaker is disposed at a bottom of the first electronic device.

In another possible design manner of the second aspect, the processor is configured to transmit a first sound signal to an earphone and a second sound signal to a speaker, and includes: and the processor is used for transmitting the first sound signal to the earphone and transmitting the second sound signal to the loudspeaker when the first electronic equipment is in a preset voice communication state.

In another possible design manner of the second aspect, the first electronic device further includes a master MIC. And the main MIC is used for acquiring sound signals around the first electronic equipment. The processor is further configured to cancel, by using the second sound signal, an interference signal from the speaker in the sound signal collected by the main MIC; or, the self-adaptive echo cancellation AEC principle is utilized to cancel the interference signal from the loudspeaker in the sound signal collected by the main MIC.

In another possible design manner of the second aspect, the first electronic device further includes: a display screen. And the display screen is used for displaying a chat interface of the instant messaging application, and the chat interface comprises a voice message from the second electronic equipment.

Wherein, the above-mentioned processor, is used for transmitting first sound signal to the earphone, transmits the second sound signal to the speaker, includes: and the processor is used for responding to the clicking operation of the user on the voice message, the first electronic equipment is held by the user, and when the first electronic equipment is close to the ear of the user, the first sound signal is transmitted to the earphone, and the second sound signal is transmitted to the loudspeaker.

In another possible design manner of the second aspect, the first electronic device further includes: and a communication module. The communication module is used for receiving a first digital audio signal from a second electronic device.

Wherein, the above-mentioned processor, is used for transmitting first sound signal to the earphone, transmits the second sound signal to the speaker, includes: the processor is used for converting the first digital audio signal into a first sound signal and transmitting the first sound signal to the receiver; the first digital audio signal is converted into a second digital audio signal, the second digital audio signal is converted into a second sound signal, and the second sound signal is transmitted to the loudspeaker.

The first sound signal and the second sound signal are both analog audio signals, and the phase of the second digital audio signal is opposite to that of the first digital audio signal.

In another possible design manner of the second aspect, the second sound signal is opposite in phase to the first sound signal, and includes: the second sound signal is out of phase with the first sound signal by [180 ° -p, 180 ° + p ]. Wherein p is greater than or equal to 0 ° and is less than a preset angle threshold.

In another possible design manner of the second aspect, the second sound signal is opposite in phase to the first sound signal, and is used for canceling sound leakage of the earphone in a preset area around the first electronic device.

Wherein, the preset area includes: an area on or near the first straight line, the distance between the area and the first point being greater than or equal to a preset distance; the first point is the middle point of a connecting line between the position of the receiver and the position of the loudspeaker; the first straight line is perpendicular to the connecting line, and the first straight line passes through the first point.

In another possible design manner of the second aspect, the second sound signal is opposite in phase to the first sound signal, and is used for canceling a leakage sound of a preset frequency played by the earphone.

In another possible design manner of the second aspect, the preset frequency includes: 100Hz-1 KHz.

In a third aspect, the present application provides a chip system for use in an electronic device including an earpiece, a speaker, and a memory. The system-on-chip includes one or more interface circuits and one or more processors. The interface circuit and the processor are interconnected by a line. The interface circuit is configured to receive signals from the memory and to send signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the electronic device performs the method as described in the first aspect and any one of its possible designs.

In a fourth aspect, the present application provides a computer-readable storage medium comprising computer instructions. The computer instructions, when executed on an electronic device, cause the electronic device to perform the method as set forth in the first aspect and any one of its possible designs.

In a fifth aspect, the present application provides a computer program product for causing a computer to perform the method according to the first aspect and any of its possible designs when the computer program product runs on the computer.

It should be understood that beneficial effects that can be achieved by the electronic device according to the second aspect and any one of the possible design manners of the electronic device according to the second aspect, the chip system according to the third aspect, the computer storage medium according to the fourth aspect, and the computer program product according to the fifth aspect may refer to the beneficial effects of the first aspect and any one of the possible design manners of the electronic device, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a product form of a mobile phone according to an embodiment of the present disclosure;

fig. 2 is a schematic view of an application scenario of a method for canceling a leakage sound according to an embodiment of the present application;

fig. 3 is a schematic diagram of a hardware structure of a mobile phone according to an embodiment of the present disclosure;

fig. 4 is a flowchart of a method for canceling a leakage sound according to an embodiment of the present application;

fig. 5 is a schematic hardware structure diagram of an audio device of a mobile phone according to an embodiment of the present disclosure;

fig. 6A is a schematic waveform diagram of a sound signal played by an earphone during voice communication in a mobile phone in the conventional technology;

fig. 6B is a schematic waveform diagram of a sound signal played by an earphone and a sound signal played by a speaker after cancellation of each other in the method for canceling a leakage sound according to the embodiment of the present application;

fig. 7 is a schematic diagram of a preset area of a mobile phone 100 according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram illustrating the cancellation effect of two sound signals with opposite phases according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating cancellation effects of sound signals of different frequencies according to an embodiment of the present application;

fig. 10 is a schematic diagram illustrating a distance between an earpiece and a speaker and a sound leakage cancellation effect according to an embodiment of the present disclosure;

fig. 11 is a schematic diagram of an echo cancellation AEC principle provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a chip system according to an embodiment of the present disclosure.

Detailed Description

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present embodiment, "a plurality" means two or more unless otherwise specified.

The embodiment of the application provides a method for counteracting the sound leakage, which can be applied to the process of voice communication of electronic equipment. By the method, the receiver sound leakage in the voice communication process of the user handheld electronic equipment can be counteracted, the leakage of the voice communication content is reduced, and therefore the privacy and the safety of the user can be protected.

The electronic device includes an earphone (also referred to as a receiver) and a speaker (also referred to as a speaker). The earphone can be arranged at a position close to the top of the electronic equipment, and the earphone is used for playing a voice signal (called as a first voice signal) of an opposite user of voice communication for the user in the voice communication process of the electronic equipment. The speaker may be a Speaker (SPK) disposed at the bottom of the electronic device, and may be referred to as a SPK.

For example, as shown in fig. 1, taking the above-mentioned electronic device as a mobile phone 100 as an example, the mobile phone 100 includes an earpiece 101 and a speaker 102 (i.e., a lower SPK). The handset 101 is positioned on the handset 100 near the top of the handset 100 and the speaker 102 is positioned at the bottom of the handset 100.

Referring to fig. 2, an application scenario diagram of the method for canceling a leakage sound according to the embodiment of the present application is shown by taking an electronic device as a mobile phone 100 as an example.

As shown in fig. 2, during voice communication of the mobile phone 100 held by the user a, the earphone 101 of the mobile phone 100 is close to the ear of the user a. The handset 101 is used to play a first sound signal of an opposite user of voice communication. The first sound signal can not only enter the ear of the user a, but be heard by the user a; but also in other directions (i.e. to propagate earpiece leaky sound waves). Thus, the first sound signal may be heard by other users in an area (i.e., a predetermined area) near the mobile phone 100 around the user a.

Based on this, in the process of performing voice communication, the mobile phone 100 may control the speaker 102 to emit a second sound signal (i.e., an anti-phase sound wave) in an anti-phase with the first sound signal according to the acoustic dipole radiation phenomenon, so as to cancel the sound leakage of the first sound signal in a preset area (including the cancellation point 1 shown in fig. 2) around the mobile phone 100, so as to reduce the leakage of the voice communication content, thereby protecting the privacy and security of the user.

The phase reversal of the second sound signal and the first sound signal specifically means: the second sound signal is about 180 ° out of phase with the first sound signal. The above-mentioned preset area and the principle of canceling the sound leakage of the first sound signal in the preset area around the mobile phone 100 in the process of performing the voice communication by the mobile phone 100 may refer to the following detailed description in the following embodiments, which are not repeated herein.

It should be noted that the electronic device (such as the mobile phone 100) may include a plurality of speakers. Illustratively, the handset 100 may include not only the speaker 102 described above (i.e., the lower SPK), but the handset 100 may also include another speaker (referred to as the upper SPK). For example, the upper SPK may be disposed on the front surface of the handset 100 near the position of the earpiece 101. In the embodiment of the present application, the handset 100 may use the speaker 102 (i.e., the lower SPK) to cancel the sound leakage of the earpiece 101.

For example, the electronic device in the embodiment of the present application may be a mobile phone, a tablet computer, an ultra-mobile personal computer (UMPC), a netbook, a device with a voice communication function, such as a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) \ Virtual Reality (VR) device, and the embodiment of the present application is not particularly limited to a specific form of the electronic device.

Referring to fig. 3, taking the electronic device as the mobile phone 100 as an example, a schematic structural diagram of the mobile phone 100 is shown. As shown in fig. 3, the cellular phone 100 may include: the mobile communication device includes a processor 310, an external memory interface 320, an internal memory 321, a Universal Serial Bus (USB) interface 330, a charging management module 340, a power management module 341, a battery 342, an antenna 1, an antenna 2, a mobile communication module 350, a wireless communication module 360, an audio module 370, a speaker 370A, a receiver 370B, a microphone 170C, an earphone interface 370D, a sensor module 380, a button 390, a motor 391, an indicator 392, a camera 393, a display 394, a Subscriber Identification Module (SIM) card interface 395, and the like.

The sensor module may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

It is to be understood that the illustrated structure of the present embodiment does not specifically limit the mobile phone 100. In other embodiments, the handset 100 may include more or fewer components than shown, or combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 310 may include one or more processing units, such as: the processor 310 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors.

The controller may be the neural center and the command center of the handset 100. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 310 for storing instructions and data. In some embodiments, the memory in the processor 310 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 310. If the processor 310 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 310, thereby increasing the efficiency of the system.

In some embodiments, processor 310 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

It should be understood that the interface connection relationship between the modules illustrated in the present embodiment is only an exemplary illustration, and does not constitute a limitation on the structure of the mobile phone 100. In other embodiments, the mobile phone 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The charging management module 340 is configured to receive charging input from a charger (e.g., a wireless charger or a wired charger) to charge the battery 342. The power management module 341 is configured to connect the battery 342, the charging management module 340 and the processor 310. The power management module 341 receives input from the battery 342 and/or the charge management module 340 to power the various components of the electronic device.

The wireless communication function of the mobile phone 100 can be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, the modem processor, the baseband processor, and the like.

The

antennas

1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the handset 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

In some embodiments, antenna 1 of the handset 100 is coupled to the mobile communication module 350 and antenna 2 is coupled to the wireless communication module 360 so that the handset 100 can communicate with networks and other devices through wireless communication techniques. The mobile communication module 350 can provide a solution including wireless communication such as 2G/3G/4G/5G applied to the mobile phone 100. The mobile communication module 350 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 350 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the filtered electromagnetic wave to the modem processor for demodulation.

The mobile communication module 350 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be disposed in the processor 310. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be disposed in the same device as at least some of the modules of the processor 310.

The wireless communication module 360 may provide solutions for wireless communication applied to the mobile phone 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), Bluetooth (BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like.

The wireless communication module 360 may be one or more devices integrating at least one communication processing module. The wireless communication module 360 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 310. The wireless communication module 360 may also receive a signal to be transmitted from the processor 310, frequency-modulate and amplify the signal, and convert the signal into electromagnetic waves via the antenna 2 to radiate the electromagnetic waves.

Of course, the wireless communication module 360 can also support the mobile phone 100 to perform voice communication. For example, the handset 100 may access a Wi-Fi network through the wireless communication module 360, and then interact with other devices using any application program that can provide voice communication services, so as to provide voice communication services for users. For example, the application program that can provide the voice communication service may be an instant messaging application.

The mobile phone 100 may implement display functions via the GPU, the display 394, and the application processor. The GPU is an image processing microprocessor coupled to a display 394 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 310 may include one or more GPUs that execute program instructions to generate or alter display information. The display screen 394 is used to display images, video, and the like.

The cell phone 100 may implement a camera function via the ISP, camera 393, video codec, GPU, display 394, application processor, etc. The ISP is used to process the data fed back by the camera 393. In some embodiments, the ISP may be located in camera 393. Camera 393 is used to capture still images or video. In some embodiments, the cell phone 100 may include 1 or N cameras 393, N being a positive integer greater than 1.

The external memory interface 320 may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the mobile phone 100. The internal memory 321 may be used to store computer-executable program code, which includes instructions. The processor 310 executes various functional applications and data processing of the cellular phone 100 by executing instructions stored in the internal memory 321. For example, in the embodiment of the present application, the processor 310 may execute instructions stored in the internal memory 321, and the internal memory 321 may include a program storage area and a data storage area.

The handset 100 may implement audio functions via the audio module 370, speaker 370A, receiver (i.e., earpiece) 370B, microphone 170C, headset interface 370D, and application processor, among other things. Such as music playing, recording, etc.

The audio module 370 is used to convert digital audio signals to analog audio signal outputs and also to convert analog audio inputs to digital audio signals. The audio module 370 may also be used to encode and decode audio signals. In some embodiments, the audio module 370 may be disposed in the processor 310, or some functional modules of the audio module 370 may be disposed in the processor 310. The speaker 370A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The receiver 370B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. The microphone 170C, also referred to as a "microphone," is used to convert sound signals into electrical signals. The headphone interface 370D is used to connect wired headphones. The headset interface 370D may be the USB interface 330, or may be a 3.5mm open mobile electronic device platform (OMTP) standard interface, a cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

The receiver 370B (i.e., "receiver") may be the receiver 101 shown in fig. 1. The speaker 370A may be the speaker 102 shown in fig. 1. The microphone 170C may be the MIC 103 shown in fig. 1, and the microphone 103 may be the primary MIC of the mobile phone 100.

For example, in the embodiment of the present application, the audio module 370 may convert an audio electrical signal received by the mobile communication module 350 and the wireless communication module 360 into a sound signal (i.e., a first sound signal). The first sound signal is played by a receiver 370B (i.e., an "earpiece") of the audio module 370. In this way, the user can hear the first sound signal. Meanwhile, the receiver 370B may have a sound leakage. Based on this, in the embodiment of the present application, the speaker 370A may emit a second sound signal in an opposite phase to the first sound signal, so as to cancel the sound leakage in the preset area around the mobile phone 100.

Keys 390 include a power-on key, a volume key, etc. The motor 391 may generate a vibration cue. Indicator 392 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc. The SIM card interface 395 is for connecting a SIM card. The handset 100 may support 1 or N SIM card interfaces, N being a positive integer greater than 1.

The methods in the following embodiments can be implemented in the mobile phone 100 having the above hardware structure. As shown in fig. 1, the handset 100 includes an earpiece 101 and a speaker 102.

The embodiment of the present application provides a method for canceling a leakage sound, which can be applied to the mobile phone 100. The handset 100 is a first electronic device. As shown in fig. 4, the method of canceling the leakage sound may include S401 to S402.

S401, the mobile phone 100 plays the first sound signal through the earpiece 101.

In an application scenario, the first sound signal may be any audio data stored in the mobile phone 100. For example, the first sound signal may be recording data or song data stored in the mobile phone 100.

In another application scenario, the handset 100 may play the first sound signal from the handset 400 through the handset 101. Specifically, the mobile phone 100 can play the first sound signal from the mobile phone 400 through the earphone 101 in the preset voice communication state. The cell phone 400 is a second electronic device.

In some embodiments, the preset voice communication state of the mobile phone 100 specifically means: the mobile phone 100 is held by a user, and the mobile phone 100 is in voice communication with other electronic devices (e.g., the mobile phone 400). For example, when the mobile phone 100 is held by the user a as shown in fig. 2 and performs voice communication with the mobile phone 400, the mobile phone 100 may be said to be in the predetermined voice communication state.

For example, the handset 100 may detect that the handset 100 is held by the user through one or more sensors (e.g., a touch sensor or a capacitive sensor disposed on the side of the handset 100) on the handset 100. Alternatively, the cellular phone 100 may detect that the cellular phone 100 is held by the user based on the reflection coefficient of the antenna provided at the side of the cellular phone 100. For a specific method for detecting that the mobile phone 100 is held by the user, reference may be made to related descriptions in the conventional technology, and details of the embodiment of the present application are not repeated herein. Moreover, the method for detecting the voice communication between the mobile phone 100 and the other electronic device by the mobile phone 100 may also refer to related descriptions in the conventional technology, and the embodiments of the present application are not described herein again.

In other embodiments, the preset voice communication state of the mobile phone 100 specifically means: the mobile phone 100 is held by a user, and the mobile phone 100 is close to a human body (e.g., close to the human ear) and performs voice communication with other electronic devices (e.g., the mobile phone 400). The mobile phone 100 may detect whether the mobile phone 100 is close to a human body through one or more sensors such as a distance sensor, an ambient light sensor, or a temperature sensor. For example, one or more sensors, such as a distance sensor, an ambient light sensor, or a temperature sensor, may be disposed on the front surface of the mobile phone 100 near the earpiece 101. The specific method for detecting whether the mobile phone 100 is close to the human body by the one or more sensors of the mobile phone 100 may refer to related descriptions in the conventional technology, and is not described herein again in the embodiments of the present application.

From the above embodiment, it can be seen that: from the perspective of the user (e.g., the mobile phone a), the condition that the mobile phone 100 is in the preset voice communication state is: user a holds the handset 100 and uses the handset 100 to communicate with other users (e.g., user B) in voice. For example, the mobile phone 100 shown in fig. 2, fig. 6A or fig. 6B is in the above-mentioned preset voice communication state.

It should be noted that, in the above embodiment, the mobile phone 100 is in the preset voice communication state, which may be a state where the mobile phone 100 performs voice communication with other electronic devices through a system application "phone" of the mobile phone 100; it may also be a state in which the cellular phone 100 performs voice communication with other electronic devices through an instant messaging application (also referred to as a chat application) of a third party.

In another application scenario, the handset 100 may play the first sound signal from the handset 400 through the handset 101. Specifically, the mobile phone 100 can receive the voice message from the mobile phone 400 through an instant messaging application (also referred to as a chat application) of the third party; the handset 100 can display a chat interface for the instant messaging application, the chat interface including voice messages from the handset 400; in response to the user clicking the voice message, the mobile phone 100 may play the first sound signal from the mobile phone 400 through the handset 101.

For example, in response to a user clicking on a voice message in a chat interface of a chat application, the handset 100 may play a first sound signal from the handset 400 via the handset 101 when the handset 100 is close to a human body (e.g., near the ear).

It should be noted that, in the embodiment of the present application, specific application scenarios in which the mobile phone 100 plays the first sound signal from the mobile phone 400 through the earphone 101 include, but are not limited to, the above application scenarios, and other application scenarios are not described herein again.

It is understood that the mobile phone 100 can play the first sound signal from the mobile phone 400 (i.e. the mobile phone of the user B) in any one of the following two playing manners according to the selection of the user. Playback mode (1): the handset 100 plays a first sound signal from the handset 400 through the handset 101. Playback mode (2): the handset 100 plays the first sound signal from the handset 400 through a speaker (e.g., speaker 102) of the handset 100. It should be noted that the method of the embodiment of the present application is applicable to a scene in which the mobile phone 100 plays the first sound signal through the earpiece 101, that is, a scene corresponding to the above-mentioned playing method (1).

S402, the mobile phone 100 plays the second sound signal through the speaker 102. The second sound signal is opposite in phase to the first sound signal.

The second sound signal and the first sound signal are both analog audio signals. The second sound signal and the first sound signal have opposite phases, and may specifically be: the second sound signal is about 180 ° out of phase with the first sound signal. For example, the second sound signal may be [180 ° -p, 180 ° + p ] out of phase with the first sound signal. Wherein p is less than a preset angle threshold. For example, p may be 0 °, or any value close to 0 ° such as 1 °, 2 °, 3 °, or the like. The preset angle threshold may be any value close to 0 ° such as 1 °, 2 °, or 3 °.

The first audio signal is an audio signal from the cellular phone 400 (referred to as an audio signal 1). Specifically, the mobile phone 400 may capture a sound signal (i.e., an analog audio signal, denoted as a sound signal 2) of the user B of the mobile phone 400, and then the mobile phone 400 may convert the sound signal 2 into a digital audio signal 1 (i.e., a first digital audio signal). The handset 400 may transmit the digital audio signal 1 to the handset 200. After receiving the digital audio signal 1, the mobile phone 200 may convert the digital audio signal 1 into a sound signal (denoted as the sound signal 1, i.e. the first sound signal mentioned above), and then play the sound signal 1 through the handset 101.

The present embodiment describes the principle that the mobile phone 100 obtains the first sound signal and plays the first sound signal through the earpiece 101 (e.g. the speaker 102) and plays the second sound signal through the speaker 102 by using the hardware structure of the audio device of the mobile phone 100 as shown in fig. 5.

As shown in fig. 5, the audio device of the mobile phone 100 may include an audio chip 501, an audio amplifier chip 502, an audio amplifier chip 503, a speaker 102, a handset 101, a primary MIC 103, a secondary MIC 504, and the like. The audio chip 501 shown in fig. 5 may be connected to the audio amplifier chip 502 and the audio amplifier chip 503 through an I2S interface.

The audio chip 501 can receive the digital audio signal 1 from other devices of the handset 100. The digital audio signal 1 (i.e. the first digital audio signal) is received by a communication module (e.g. the mobile communication module 350) of the mobile phone 100 from the mobile phone 400. For the detailed description of the primary MIC 103 and the secondary MIC 504, reference may be made to the description in the following embodiments, which are not repeated herein.

In the playing mode (1), after receiving the digital audio signal 1, the audio chip 501 may transmit the digital audio signal 1 to the audio amplifier chip 503, and transmit the digital audio signal 2 (i.e., the second digital audio signal) in an opposite phase to the digital audio signal 1 to the audio amplifier chip 502. The phase of the digital audio signal 1 is opposite to that of the digital audio signal 2, specifically: the digital audio signal 1 is 180 ° out of phase with the digital audio signal 2.

Then, the audio power amplifier chip 503 may perform digital-to-analog conversion and power amplification on the digital audio signal 1 to obtain the first audio signal (i.e. analog audio signal, such as the audio signal 1). Then, the audio amplifier chip 503 may transmit the first sound signal to the receiver 101, and the receiver 101 plays the first sound signal.

Meanwhile, the audio power amplifier chip 503 may perform digital-to-analog conversion and power amplification on the digital audio signal 2 to obtain the second audio signal (i.e., an analog audio signal, such as the audio signal 2). The audio power amplifier chip 503 may then transmit the second sound signal to the speaker 102, and the speaker 102 plays the second sound signal.

The present embodiment illustrates the principle of canceling the earphone leakage by the second sound signal in the embodiment of the present application through the waveform diagrams of the sound signals shown in fig. 6A and fig. 6B.

Generally, the waveform of an acoustic signal (i.e., an acoustic wave) without being blocked by an obstacle is a spherical wave. In the case where there is an obstacle blocking, the waveform of the sound signal also approximates to a spherical wave. For example, please refer to fig. 6A, which shows a waveform diagram of a first sound signal played by the handset 101 during voice communication of the mobile phone 100. As shown in fig. 6A, the waveform 601 of the first sound signal approximates to a spherical wave.

As shown in fig. 6A, when another user (e.g., user C) is closer to user a (i.e., the distance between user C and user a is less than the preset distance), the first sound signal may be transmitted to the ear of user C and heard by user C. For example, the predetermined distance may be any one of 50 centimeters (cm), 60cm, or 55 cm. In the embodiment of the present application, the method of the embodiment of the present application is described by taking an example in which the preset distance is 50 cm. Therefore, the privacy of the user A can be leaked, and the privacy security of the user A is influenced. In this embodiment, while the mobile phone 100 plays the first sound signal through the earpiece 101, the mobile phone 100 may perform S402 to cancel the sound leakage of the earpiece 101.

Moreover, if the parameters such as amplitude, frequency and the like at the same time are the same, the two sound waves (i.e. sound signals) with different sound sources have opposite phases; then, the two sound waves can cancel each other out at a specific position (also referred to as a predetermined region) and angle during the propagation process.

As shown in fig. 6A, the waveform 601 of the first sound signal approximates to a spherical wave. However, in the embodiment of the present application, the first acoustic signal encounters the second acoustic signal in an opposite phase to the first acoustic signal at some positions (also referred to as a predetermined region) during the propagation process. At this time, since the second sound signal and the first sound signal have opposite phases, the second sound signal and the first sound signal can cancel each other in the predetermined region. Thus, the waveform of the first audio signal may change at the position due to cancellation of the second audio signal. For example, the waveform of the first sound signal changes from 601 shown in fig. 6A to 602 shown in fig. 6B. A waveform 603 shown in fig. 6B is a waveform in which the second sound signal is canceled by the first sound signal.

As shown in fig. 6B, during the propagation of the first sound signal and the second sound signal, the area (i.e., the predetermined area) where the dotted line shown in fig. 6B is located may cancel each other, so that the sound leakage of the first sound signal in the predetermined area may be reduced. As shown in fig. 6B, the user C is in the preset area for canceling the leakage sound, and therefore cannot hear the first sound signal played by the earpiece 101, so that the privacy of the user a can be protected from being leaked.

The embodiment of the present application introduces the preset region, i.e., the position where the leakage sound can be cancelled. Generally, when the mobile phone 100 plays a first sound signal through the receiver 101, the mobile phone 100 is held by a vertical screen. For example, the relative positions of the earpiece 101 and speaker 102 of the handset 100 are shown in fig. 7. As shown in fig. 7, the point O (i.e., the first point) is a midpoint of a line connecting positions of the earpiece 101 and the speaker 102; the line L (i.e., the first line) is perpendicular to a line connecting the positions of the earpiece 101 and the speaker 102, and the line L passes through the point O. The preset area may include a white area on or near the straight line L shown in fig. 7. From experimental data it can be seen that: the method of the embodiment of the present application can cancel the sound leakage in the area on the straight line L or near the straight line L shown in fig. 7, which is located at a predetermined distance (e.g., 50cm) from the point O. That is, the predetermined region may include a region having a distance of about a predetermined distance (e.g., 50cm) from the point O on or near the line L shown in fig. 7.

Generally, when the ear of the user C is close to the mobile phone 100 (e.g., the distance between the ear of the user C and the mobile phone 100 is less than the preset distance), the user C can hear the sound signal played by the mobile phone 100 through the earphone 101. The predetermined area includes an area where the user C (or the ear of the user C) is located when the ear of the user C is close to the cellular phone 100. Therefore, in the embodiment of the present application, the mobile phone 100 plays the first sound signal through the earpiece 101, and simultaneously plays the second sound signal with the phase opposite to the first sound signal through the speaker 102, so as to cancel the sound leakage of the earpiece 101 in the preset area around the mobile phone 100. Therefore, the leakage of voice communication content can be reduced, and the privacy and the safety of the user can be protected.

Wherein the frequency range of the human voice is approximately 100 hertz (Hz) -10 kilohertz (KHz). The frequency of the voice signal of the user B (i.e., the first voice signal) may be changed in real time during the voice call between the user a and the user B. The intensity of the first sound signal may be changed in real time. Wherein the unit of the intensity of the first sound signal is decibels (dB). It should be noted that the cancellation effect of two sound signals with opposite phases at different frequencies may be different.

The present embodiment will now be described with reference to fig. 8, which is a schematic diagram illustrating the effect of frequency on the cancellation effect of two sound signals with opposite phases. The dotted line 801, the solid line 802, and the dotted line 803 shown in fig. 8 are all changes of a sound signal (i.e., a sound leakage) that is monitored by the monitoring device in a preset area (e.g., a point C on the straight line L shown in fig. 7) of the mobile phone 100, which is simulated by the user C shown in fig. 7.

Specifically, a dashed line 801 shown in fig. 8 shows a change of the sound signal (i.e., the sound leakage) monitored by the monitoring device at the point C in the case where the handset 100 plays the first sound signal only through the earpiece 101 (abbreviated as case 1). A solid line 802 shown in fig. 8 shows a change of the sound signal (i.e., the sound leakage) monitored by the monitoring device at the point C in the case where the mobile phone 100 plays the first sound signal through the earpiece 101 and plays the second sound signal through the speaker 102 (abbreviated as case 2). A dashed line 803 shown in fig. 8 shows a change of the sound signal (i.e., the leakage sound) monitored by the monitoring device at the point C in the case where the mobile phone 100 plays the second sound signal through the speaker 102 (abbreviated as case 3).

Comparing the dashed line 801 and the dashed line 803 shown in fig. 8 shows that: in the above cases 1 and 3, the difference of the sound signals monitored by the monitoring apparatus is small.

Comparing the dashed line 801 and the solid line 802 shown in FIG. 8 shows that: in the

above cases

1 and 2, the difference between the sound signals monitored by the monitoring device is large. As shown in fig. 8, in case 2 (i.e. the case of performing the cancellation of the leakage sound by using the method of the present application) between 100Hz and 1KHz (the preset frequency), the intensity of the sound signal monitored by the monitoring device is significantly reduced. As shown in fig. 8, when the frequency of the sound signal (i.e., the leakage sound) is 300Hz, the intensity of the sound signal is the lowest, and the effect of the leakage sound cancellation is the best on the solid line 802.

The present embodiment will now be described with reference to fig. 9, which is a schematic diagram illustrating the effect of frequency on the cancellation effect of two sound signals with opposite phases. Fig. 9 (a-1) is a schematic diagram showing a simulated waveform of the first sound signal with a frequency of 100Hz, which is played by the mobile phone 100 through the receiver 101 only; fig. 9 (a-2) is a schematic diagram showing simulated waveforms of the first sound signal and the second sound signal in the case where the mobile phone 100 plays the first sound signal with the frequency of 100Hz through the earpiece 101 and plays the second sound signal with the frequency of 100Hz through the speaker 102. The dashed line area 901 in fig. 9 (a-2) is a predetermined area of the cellular phone 100.

Fig. 9 (b-1) is a schematic diagram showing a simulated waveform of the first sound signal with the frequency of 500Hz, which is played by the mobile phone 100 through the receiver 101 only; fig. 9 (b-2) is a schematic diagram showing simulated waveforms of the first sound signal and the second sound signal in the case where the mobile phone 100 plays the first sound signal with the frequency of 500Hz through the earpiece 101 and plays the second sound signal with the frequency of 500Hz through the speaker 102. The dashed area 902 in fig. 9 (b-2) is a predetermined area of the cellular phone 100.

Fig. 9 (c-1) is a schematic diagram showing a simulated waveform of the first sound signal with a frequency of 1KHz, in a case where the mobile phone 100 only plays the first sound signal through the earpiece 101; fig. 9 (c-2) is a schematic diagram showing simulated waveforms of the first sound signal and the second sound signal in the case where the mobile phone 100 plays the first sound signal with the frequency of 1KHz through the earpiece 101 and plays the second sound signal with the frequency of 1KHz through the speaker 102. The dashed area 903 in (c-2) of fig. 9 is a predetermined area of the cellular phone 100.

Fig. 9 (d-1) is a schematic diagram showing a simulated waveform of the first sound signal with a frequency of 2KHz, in a case where the mobile phone 100 only plays the first sound signal through the earpiece 101; fig. 9 (d-2) is a schematic diagram showing simulated waveforms of the first sound signal and the second sound signal in the case where the mobile phone 100 plays the first sound signal with the frequency of 2KHz through the earpiece 101 and plays the second sound signal with the frequency of 2KHz through the speaker 102.

As can be seen by comparing (a-1) in FIG. 9, (a-2) in FIG. 9, (b-1) in FIG. 9, (b-2) in FIG. 9, (c-1) in FIG. 9, (c-2) in FIG. 9, (d-1) in FIG. 9 and (d-2) in FIG. 9: by adopting the method of the embodiment of the application, the sound leakage with the frequency of 100Hz, 500Hz or 1KHz played by the receiver 101 in the preset area of the mobile phone 100 can be counteracted. However, it is impossible to cancel the leakage sound of 2KHz played by the receiver 101 in the preset area of the mobile phone 100

In summary, by using the method of the embodiment of the present application, the leakage sound of the partial frequency played by the receiver 101 in the preset area of the mobile phone 100 can be cancelled. In other words, by using the method of the embodiment of the present application, in the preset area of the mobile phone 100, a better cancellation effect can be generated for the leakage sound of the partial frequency played by the earpiece 101.

From the above description it follows that: the human voice has a frequency range of approximately 100Hz-10 KHz. During the voice call between the user a and the user B, the frequency of the voice signal of the user B (i.e., the first voice signal) is changed in real time. That is, during the voice call between the user a and the user B, the receiver 101 of the mobile phone 100 may play the sound signal with any frequency in the frequency range of 100Hz to 10 KHz. It should be noted that, although the method of the embodiment of the present application is adopted, only the leakage sound of the partial frequency played by the earpiece 101 can be cancelled, or only the leakage sound of the partial frequency played by the earpiece 101 can produce a better cancellation effect; however, as long as part of the frequencies played by the receiver 101 can be cancelled, the cancelled leakage sound of the part of the frequencies will not be propagated to the ears of other users (such as the user C mentioned above) and will not be heard by the user C. In this way, even if the user C hears the leakage sound of another part of the frequencies, the content of the voice communication cannot be known according to the leakage sound of the other part of the frequencies, so that the privacy security of the user can be protected.

Therefore, by the method, the sound leakage of the earphone of the electronic equipment can be effectively counteracted, the leakage of voice communication content is reduced, and the privacy safety of a user can be protected.

The distance between the sound source of the first audio signal (i.e., the earpiece 101) and the sound source of the second audio signal (i.e., the speaker 102) affects the effect of canceling the leakage sound.

Referring to fig. 10, a schematic diagram of cancellation effect of two opposite-phase sound signals (e.g., sound signal a and sound signal b) when the distances between the sound sources are 10 millimeters (mm), 100mm and 158mm, respectively, is shown.

As shown in fig. 10, when the frequency of the sound signal a and the sound signal b is constant (for example, the frequency is any one of 100Hz, 500Hz, 3KHz, or 6 KHz), and the distance between the sound source of the sound signal a and the sound source of the sound signal b is 10mm, the cancellation effect of the sound signal a and the sound signal b is best. The black area in fig. 10 is an area where the sound signal a and the sound signal b cancel each other. That is, the closer the sound source distance of two sound signals having opposite phases is, the better the cancellation effect of the two sound signals is.

However, as shown in fig. 10, when the distance between the sound source of the sound signal a and the sound source of the sound signal b is 100mm or 158mm, the sound signal a and the sound signal b have a certain cancellation effect in the predetermined region. For a detailed description of the preset region, reference may be made to the related descriptions in the above embodiments, which are not repeated herein.

The length of a current larger-sized mobile phone (e.g. a mobile phone with a larger screen size) is about 158mm, that is, the distance between an earphone disposed at the top of the mobile phone and a speaker disposed at the bottom of the mobile phone is about 158 mm. As can be seen from fig. 10, for such a mobile phone, by using the method of the embodiment of the present application, the sound leakage of the receiver in the preset area of the mobile phone can be effectively counteracted, and the leakage of the voice communication content can be reduced, so that the privacy and security of the user can be protected.

Also, according to the cancellation effect shown in fig. 10, the smaller the distance between the earpiece and the speaker, the better the leakage cancellation effect. Therefore, for the mobile phone with the distance between the earphone and the loudspeaker being less than 158mm, by adopting the method of the embodiment of the application, a better sound leakage cancellation effect can be obtained compared with 158mm shown in fig. 10. Therefore, for the mobile phones of various sizes at present, by adopting the method of the embodiment of the application, the sound leakage of the receiver in the preset area of the mobile phone can be effectively counteracted, the leakage of the voice communication content can be reduced, and the privacy and the safety of the user can be protected.

In some embodiments, when the mobile phone 100 is in the preset voice communication state, in order to reduce the leakage of the voice communication content, as long as the first sound signal is played through the earpiece 101, the second sound signal can be played through the speaker 102 to counteract the leakage of the earpiece 101 in the preset area.

Specifically, as long as the audio chip 501 shown in fig. 5 sends the digital audio signal 1 to the audio power amplifier chip 502 through the I2S interface, the digital audio signal 2 with the phase opposite to that of the digital audio signal 1 may be sent to the audio power amplifier chip 503 through the I2S interface. Thus, when the audio power amplifier chip 502 converts the digital audio signal 1 into a first sound signal and the earphone 101 plays the first sound signal; the audio power amplifier chip 503 can convert the digital audio signal 2 into a second audio signal, and play the second audio signal through the speaker 102.

However, when the volume of the mobile phone 100 is small, the handset sound leakage is not serious. The user C shown in fig. 6A or 6B needs to be in close proximity to the cellular phone 100 to hear the voice communication contents of the cellular phone 100. At this time, the eavesdropping behavior of the user C is easily found by the user a. In this case, user a may be actively away from user C to reduce the leakage of voice communication content; without playing a second sound signal through the speaker 102 to counteract the sound leakage of the earpiece 101 in the predetermined area. After all, playing the second sound signal through the speaker 102 may increase the power consumption of the handset 100; the second sound signal may also be picked up by the primary MIC 103 of the handset 100, affecting the quality of the voice communication.

Based on this, in other embodiments, the mobile phone 100 may determine whether the current volume of the handset 101 of the mobile phone 100 is greater than the preset volume threshold. If the current volume of the earpiece 101 is greater than the preset volume threshold, the handset 100 may perform S402. If the current volume of the earpiece 101 is less than or equal to the preset volume threshold, the mobile phone 100 does not need to execute S402.

In this embodiment, the mobile phone 100 may play the second sound signal through the speaker 102 to cancel the sound leakage of the earpiece 101 in the preset area when the current volume of the earpiece 101 is greater than the preset volume threshold, that is, when there is a high possibility that the earpiece 101 leaks sound.

It is understood that although the second sound signal is played through the speaker 102 in the step S402, the sound leakage of the earpiece 101 may be counteracted; however, as shown in fig. 1, the primary MIC 103 of the handset 100 is closer to the speaker 102. A second sound signal played by the loudspeaker 102 may be picked up (or picked up) by the MIC 103. In this case, the sound signal transmitted from the mobile phone 100 to the mobile phone 400 is mixed with the second sound signal. Thus, the voice communication quality of the user is affected.

In some embodiments, the handset 100 (e.g., a processor of the handset 100, such as a processor of an audio chip shown in fig. 5) may directly use the second sound signal to cancel an interfering signal from the speaker 102 in the sound signal collected by the main MIC 103, so as to reduce the influence of the second sound signal on the voice call.

In other embodiments, the handset 100 may utilize AEC principles to reduce the effect of the second sound signal on the voice call.

It can be understood that, since the main MIC 103 of the mobile phone 100 is close to the speaker 102, and the relative position is fixed; therefore, the second sound signal played by the loudspeaker 102 may be collected (or picked up) by the main MIC 103 after passing through a certain echo path (referred to as a true echo path).

In this embodiment, the handset 100 (e.g., a processor of the handset 100, a processor of the audio chip shown in fig. 5) may adjust weight vectors of the filter using different adaptive filtering algorithms to estimate an approximate echo path that approximates the real echo path, so as to obtain an estimated echo signal (corresponding to the second sound signal collected by the main MIC 103 and propagated through the real echo path), and remove the estimated echo signal (corresponding to the second sound signal collected by the main MIC 103 and propagated through the real echo path) from a mixed signal (including the voice signal of the user a, the environmental noise, and the second sound signal propagated through the real echo path) collected by the main MIC 103, so as to eliminate an influence of the second sound signal on the voice call.

Referring to FIG. 11, a functional block diagram of an AEC is shown. X (n) in fig. 11 is a far-end signal, i.e., a second sound signal played by the speaker 102. x (n) may pass through an unknown echo path ω (n) to obtain y (n) ═ x (n) × ω (n). Wherein the unknown echo path ω (n) may be an echo path preset in the handset 100, or the ω (n) may be an echo path randomly selected by the handset 100. y (n) plus the observation noise v (n) can be the desired signal d (n) ═ y (n) + v (n). Where the observed noise v (n) may be ambient noise surrounding the handset 100. The observed noise v (n) may be collected (or picked up) by the secondary MIC 504 of the handset shown in figure 5. x (n) can also get the estimated echo signal through the adaptive filter

Subtracting the desired signal d (n) to obtain an error signal

Wherein, the smaller the error signal e (n), the closer the echo path estimated by the adaptive filtering algorithm is to the true echo path.

In the embodiment of the present application, the handset 100 may adjust the weight vector of the filter by using a specific adaptive algorithm, so as to estimate the echo path

Gradually approaching the true echo path. The handset 100 can then follow a path that is close to the true echo path

And the second sound signal x (n) to obtain an estimated echo signal. Finally, the estimated echo signal is removed from the mixed signal collected by the primary MIC 103 to cancel the effect of the second sound signal on the voice call.

It should be noted that, in the embodiment of the present application, the method for eliminating the influence of the second audio signal on the voice call by the mobile phone 100 includes, but is not limited to, the methods described in the foregoing embodiments, and other methods for eliminating the influence of the second audio signal on the voice call may refer to related descriptions in the conventional art, which are not repeated herein.

According to the method provided by the embodiment of the application, the receiver sound leakage in the voice communication process of the user handheld electronic equipment can be counteracted through the second sound signal played by the loudspeaker 102, the leakage of voice communication contents is reduced, and the privacy and safety of a user are protected; the influence of the second sound signal on the voice call can be eliminated, and the voice call quality is ensured.

Other embodiments of the present application provide an electronic device, which may include: a processor, a memory, an earpiece, and a speaker. The memory, earpiece, and speaker are coupled to the processor. The memory described above is used to store computer program code comprising computer instructions. When the processor executes the computer instructions, the electronic device may perform the functions or steps performed by the handset in the above-described method embodiments. The structure of the electronic device may refer to the structure of the cellular phone 100 shown in fig. 3.

The processor may include the processor 310 shown in fig. 3, and the audio module 370 shown in fig. 3. The audio module 370 may include an audio chip 501, an audio power amplifier chip 502, and an audio power amplifier chip 503 shown in fig. 5. The corresponding earpiece 370B shown in fig. 3 may be the earpiece 101 shown in fig. 5, the microphone 370C shown in fig. 3 may include the primary MIC 103 shown in fig. 5, and the speaker 370A shown in fig. 3 may be the speaker 102 shown in fig. 5.

The embodiment of the application also provides a chip system, and the chip system can be applied to electronic equipment comprising an earphone, a loudspeaker and a memory. The electronic equipment can play the first sound signal through the earphone and play the second sound signal through the loudspeaker.

For example, the chip system 1200 shown in fig. 12 may be applied to an electronic device including an earpiece, a speaker, and a memory. The chip system 1200 includes at least one processor 1201 and at least one interface circuit 1202. The processor 1201 and the interface circuit 1202 may be interconnected by wires. For example, the interface circuit 1202 may be used to receive signals from other devices (e.g., a memory of an electronic device). Also for example, the interface circuit 1202 may be used to send signals to other devices, such as the processor 1201. Illustratively, the interface circuit 1202 may read instructions stored in a memory and send the instructions to the processor 1201. The instructions, when executed by the processor 1201, may cause the electronic device to perform the various steps in the embodiments described above. Of course, the chip system may further include other discrete devices, which is not specifically limited in this embodiment of the present application.

The embodiment of the present application further provides a computer storage medium, where the computer storage medium includes computer instructions, and when the computer instructions are run on the electronic device, the electronic device is caused to perform each function or step performed by the mobile phone 100 in the foregoing method embodiment.

The embodiment of the present application further provides a computer program product, which when running on a computer, causes the computer to execute each function or step executed by the mobile phone in the above method embodiments.

Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for canceling leakage sound, applied to a first electronic device including an earpiece and a speaker, the method comprising:

the first electronic equipment plays a first sound signal through the earphone;

the first electronic device plays a second sound signal through the loudspeaker, wherein the second sound signal is opposite in phase to the first sound signal.

2. The method of claim 1, wherein the earpiece is disposed near a top of the first electronic device and the speaker is disposed at a bottom of the first electronic device.

3. The method of claim 1 or 2, wherein the first electronic device plays a first sound signal through the earpiece, comprising:

the first electronic equipment plays the first sound signal from the second electronic equipment through the earphone in a preset voice communication state;

wherein, the preset voice communication state is as follows: the first electronic equipment is held by a user and carries out voice communication with the second electronic equipment through a telephone application or an instant messaging application; or the first electronic device is held by a user, is close to the ear of the user, and is in a voice communication state with the second electronic device through a telephone application or an instant messaging application.

4. The method of claim 3, wherein the first electronic device further comprises a primary Microphone (MIC); the method further comprises the following steps:

the first electronic equipment adopts the second sound signal to counteract interference signals from the loudspeaker in the sound signals collected by the main MIC;

alternatively, the first and second electrodes may be,

and the first electronic equipment offsets interference signals from the loudspeaker in the sound signals collected by the main MIC by using a self-adaptive echo offset principle.

5. The method of claim 1 or 2, wherein before the first electronic device plays the first sound signal through the earpiece, the method further comprises:

the first electronic equipment displays a chat interface of an instant messaging application, wherein the chat interface comprises a voice message from second electronic equipment;

wherein, the first electronic device plays the first sound signal from the second electronic device through the earphone, including:

responding to the clicking operation of the user on the voice message, the first electronic equipment is held by the user, and when the first electronic equipment is close to the ear of the user, the first electronic equipment plays the first sound signal through the earphone.

6. The method of any of claims 1-5, wherein the second sound signal is in phase opposition to the first sound signal, comprising:

the second sound signal is [180 ° -p, 180 ° + p ] out of phase with the first sound signal; wherein p is greater than or equal to 0 ° and is less than a preset angle threshold.

7. The method according to any of claims 1-6, wherein the second sound signal is in phase opposition to the first sound signal for canceling out sound leakage from the earpiece in a predetermined area around the first electronic device;

wherein the preset area includes: an area on or near the first straight line, the distance between the area and the first point being greater than or equal to a preset distance; the first point is the midpoint of a connecting line between the position of the earphone and the position of the loudspeaker; the first line is perpendicular to the connecting line, and the first line passes through the first point.

8. The method as claimed in any one of claims 1-7, wherein the second sound signal is in phase opposition to the first sound signal for canceling out a leakage sound of a predetermined frequency played by the earphone.

9. The method of claim 8, wherein the preset frequency comprises: 100Hz-1 KHz.

10. An electronic device, wherein the electronic device is a first electronic device, the first electronic device comprising: a processor, an earpiece, and a speaker;

the processor is configured to transmit a first sound signal to the earpiece and a second sound signal to the speaker, where the second sound signal is in opposite phase to the first sound signal;

the earphone is used for playing the first sound signal;

the loudspeaker is used for playing the second sound signal.

11. The electronic device of claim 10, wherein the earpiece is disposed near a top of the first electronic device and the speaker is disposed at a bottom of the first electronic device.

12. The electronic device of claim 10 or 11, wherein the processor configured to transmit a first sound signal to the earpiece and a second sound signal to the speaker comprises:

the processor is configured to transmit the first sound signal to the earphone and transmit the second sound signal to the speaker when the first electronic device is in a preset voice communication state;

13. The electronic device of claim 12, wherein the first electronic device further comprises a primary microphone;

the main microphone is used for collecting sound signals around the first electronic equipment;

the processor is further configured to cancel, by using the second sound signal, an interference signal from the speaker in the sound signal collected by the main microphone; or, using a self-adaptive echo cancellation principle to cancel an interference signal from the speaker in the sound signal collected by the main microphone.

14. The electronic device of claim 10 or 11, wherein the first electronic device further comprises: a display screen;

the display screen is used for displaying a chat interface of the instant messaging application, and the chat interface comprises a voice message from the second electronic equipment;

wherein the processor is configured to transmit a first sound signal to the earpiece and a second sound signal to the speaker, and comprises:

the processor is configured to respond to a click operation of a user on the voice message, where the first electronic device is held by the user, and when the first electronic device is close to an ear of the user, transmit the first sound signal to the earphone, and transmit the second sound signal to the speaker.

15. The electronic device of any of claims 12-14, wherein the first electronic device further comprises: a communication module;

the communication module is used for receiving a first digital audio signal from a second electronic device;

the processor is configured to convert the first digital audio signal into the first sound signal and transmit the first sound signal to the earpiece; converting the first digital audio signal into a second digital audio signal, converting the second digital audio signal into the second sound signal, and transmitting the second sound signal to the speaker;

wherein the first and second sound signals are the analog audio signals, and the second digital audio signal is opposite in phase to the first digital audio signal.

16. The electronic device of any of claims 10-15, wherein the second sound signal is in opposite phase with the first sound signal, comprising:

17. The electronic device of any of claims 10-16, wherein the second sound signal is in phase opposition to the first sound signal for canceling sound leakage from the earpiece in a predetermined area around the first electronic device;

18. The electronic device of any of claims 10-17, wherein the second sound signal is in phase opposition to the first sound signal for canceling a leakage sound of a predetermined frequency played by the earpiece.

19. The electronic device of claim 18, wherein the preset frequency comprises: 100Hz-1 KHz.

20. A chip system, wherein the chip system is applied to an electronic device comprising an earpiece, a speaker and a memory; the chip system includes one or more interface circuits and one or more processors; the interface circuit and the processor are interconnected through a line; the interface circuit to receive signals from the memory and to send the signals to the processor, the signals including computer instructions stored in the memory; the electronic device performs the method of any of claims 1-9 when the processor executes the computer instructions.

21. A computer-readable storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the method of any of claims 1-9.

22. A computer program product, characterized in that, when the computer program product is run on a computer, it causes the computer to perform the method according to any of claims 1-9.