WO2017197742A1

WO2017197742A1 - Method and device for audio processing

Info

Publication number: WO2017197742A1
Application number: PCT/CN2016/089183
Authority: WO
Inventors: 蒋晓
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-18
Filing date: 2016-07-07
Publication date: 2017-11-23
Also published as: CN107404683A

Abstract

A method and device for audio processing, comprising the steps of: switching between a speaker mode and a microphone mode; when entering the speaker mode, controlling an acoustic-electric two-way transducer to receive an electric signal and to convert the electric signal into an audio signal then to output same; and when entering the microphone mode, controlling the acoustic-electric two-way transducer to capture an audio signal and to convert the audio signal into an electric signal then to output same.

Description

Sound processing method and device

Technical field

This document relates to, but is not limited to, the field of electronic technology, and more particularly to a sound processing method and apparatus.

Background technique

Terminal devices usually have sound processing functions, including playing sounds, recording sounds, etc., wherein the playing sound is implemented by a speaker, and the recording sound is realized by a microphone (or a microphone, MIC). Each speaker and microphone includes a transducer. The transducer of the speaker, also known as the electroacoustic transducer, can convert the electrical signal into a sound signal to realize the sound playback; the transducer of the microphone, also called the acoustic-electric converter, can convert the sound signal into an electrical signal to realize the sound. Recording.

According to the working principle and structure of the transducer, the speaker is divided into a moving coil speaker, a moving iron speaker, an electrostatic speaker and the like. Among them, the transducer of the moving coil speaker is a moving coil structure, that is, a moving coil type transducer. As shown in FIG. 1 , the moving coil type transducer of the moving coil speaker mainly includes a diaphragm 10 , a folding ring 20 , a paper cone 30 , a dust cap 40 , a fixed chip 50 , a coil 60 , a permanent magnet 70 , and a magnetic conductive plate . The 80 and the outer magnet 90, the diaphragm 10, the folded ring 20, the fixed chip 50, the coil 60, and the skeleton of the carrier coil 60 constitute a vibration system, and the permanent magnet 70, the magnetic conductive plate 80, and the outer magnet 90 constitute a magnetic circuit system. The working principle is as follows: the alternating electrical signal is input into the coil 60 of the vibration system, and is subjected to the action of the force in the magnetic field formed by the magnetic circuit system. The properties of this force follow the left-hand rule (motor rule), motion The coil 60 drives the diaphragm 10 to generate vibration, thereby emitting a sound and completing the electro-acoustic conversion.

According to the working principle and structure of the transducer, the microphone is divided into a moving coil microphone, a condenser microphone, and a column-level microphone. Among them, the transducer of the moving coil microphone is a moving coil structure, that is, a moving coil type transducer. As shown in FIG. 2, the moving coil type transducer of the moving coil microphone mainly includes a diaphragm 100, a coil 200 connecting the diaphragm 100, and a magnet 300. The diaphragm 100 and the coil 200 constitute a vibration system, and the magnet 300 constitutes a magnetic circuit system. . The working principle is that the sound wave reaches the diaphragm 100, and the diaphragm 100 vibrates under the pressure of the sound pressure. The vibrating diaphragm 100 drives the coil 200 to reciprocate in the magnetic field formed by the magnetic circuit system to cut the magnetic field. At this time, the coil 200 Inductive current is generated in the current direction, and the current direction follows the right-hand rule (specialization of the time rule), and the current 200 is an electrical signal formed after the acoustic-electrical conversion. It can be seen that the moving coil transducer of the moving coil speaker and the moving coil microphone realizes the process of electroacoustic conversion and acoustic-electric conversion.

As the terminal device becomes more intelligent, the sound function of the terminal device is also more abundant, and the related technology mainly realizes a richer sound function by means of device stacking, that is, setting more speakers and microphones in the terminal device. The sound processing device, and each speaker and microphone has a transducer. Therefore, on the one hand, the cost of the terminal is improved; on the other hand, for a mobile terminal with limited size, the internal space is extremely valuable, and the added transducer occupies more space, which is disadvantageous to the slimness of the mobile terminal. At the same time, although the cost of the moving coil microphone is relatively low, due to the large volume of the transducer, it is only possible to use a column-level microphone or a condenser microphone which is relatively expensive but small in size.

In summary, the related terminal equipment enriches the sound function by means of device stacking, increases the volume of the terminal, is not conducive to the miniaturization of the terminal, and increases the cost of the terminal.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a sound processing method and apparatus, which can reduce terminal volume and cost.

The embodiment of the invention provides a sound processing method, comprising the steps of:

Switch between speaker mode and microphone mode;

When entering the speaker mode, controlling the acoustic-electric bidirectional transducer to receive an electrical signal, and converting the electrical signal into a sound signal for output;

When entering the microphone mode, the acoustic-electric bidirectional transducer is controlled to collect a sound signal, and the sound signal is converted into an electrical signal and then output.

Optionally, the switching between the speaker mode and the microphone mode comprises: receiving a switching instruction, and switching between a speaker mode and a microphone mode according to the switching instruction.

Optionally, the switching between the speaker mode and the microphone mode comprises: detecting a current working state, and switching between the speaker mode and the microphone mode according to the working state.

Optionally, after the step of converting the sound signal into an electrical signal and outputting the signal, the electrical signal output by the acoustic-electric bidirectional transducer is amplified.

Optionally, the acoustic-electric bidirectional transducer comprises a moving coil transducer.

A sound processing device provided by an embodiment of the invention includes a mode switching module, a first processing module, a second processing module, and an acoustic-electric bidirectional transducer, wherein:

The mode switching module is configured to switch between a speaker mode and a microphone mode;

The first processing module is configured to, when entering the speaker mode, control the acoustic-electric bidirectional transducer to receive an electrical signal, and convert the electrical signal into a sound signal for output;

The second processing module is configured to control the acoustic-electric bidirectional transducer to collect a sound signal when entering the microphone mode, and convert the sound signal into an electrical signal and output the sound signal.

Optionally, the mode switching module is configured to: receive a switching instruction, and switch between a speaker mode and a microphone mode according to the switching instruction.

Optionally, the mode switching module is configured to: detect a current working state, and switch between a speaker mode and a microphone mode according to the working state.

Optionally, the second processing module includes a signal amplifying unit, and the signal amplifying unit is configured to: receive an electrical signal output by the acoustic-electric bidirectional transducer, and perform amplification processing on the electrical signal.

The sound processing method of the embodiment of the invention realizes the speaker function by performing electro-acoustic conversion through the acoustic-electric two-way transducer in the speaker mode by switching between the speaker mode and the microphone mode, and the two-way transduction by the sound and electricity in the microphone mode The sound and electric conversion of the device realizes the microphone function, which combines the function of the speaker and the function of the microphone. It is equivalent to the multiplexer of a transducer by the speaker and the microphone, which realizes the integrated design of the speaker and the microphone, thereby reducing the components in the terminal. In turn, the occupied space is reduced, which is beneficial to the miniaturization of the terminal, especially the mobile terminal, and greatly reduces the cost.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic structural view of a moving coil type transducer of a moving coil type speaker according to the related art;

2 is a schematic structural view of a moving coil transducer of a moving coil microphone in the related art;

3 is a flowchart of a sound processing method according to an embodiment of the present invention;

4 is a schematic block diagram of a sound processing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic block diagram of a second processing module of a sound processing apparatus according to an embodiment of the present invention; FIG.

6 is a schematic diagram of signal transmission when a sound processing device is used as a speaker according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of signal transmission when a sound processing device is used as a microphone according to an embodiment of the present invention.

Embodiments of the invention

The present invention 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 invention and are not intended to limit the invention.

Referring to FIG. 3, a sound processing method according to an embodiment of the present invention is proposed, and the method includes the following steps:

S11, switching between the speaker mode and the microphone mode.

Optionally, a switching instruction is received to switch between a speaker mode and a microphone mode according to the switching instruction. For example, after receiving the switching command, it is judged whether it is currently in the speaker mode or the microphone mode; when in the speaker mode, it is switched from the speaker mode to the microphone mode; when in the microphone mode, it is switched from the microphone mode to the speaker mode. For another example, the switching instruction includes a first switching instruction and a second switching instruction. When the first switching instruction is received, the speaker mode is entered; when the second switching instruction is received, the microphone mode is entered.

Optionally, the current working state is detected, and switching between the speaker mode and the microphone mode is performed according to the working state. For example, the working state includes a first working state and a second working state, and when it is detected that it is currently in the first working state (such as a video playing state, a music playing state, a recording playing state, a ringing state, etc.), entering the speaker mode; When it is detected that it is currently in the second working state (such as recording state, call state, etc.), it enters the microphone mode. The judgment of the working state can be made by detecting the currently enabled application.

In addition, the switching of the two modes can be implemented in other ways. For example, when it is detected that the electrical signal input end of the acoustic-electric bidirectional transducer has an electrical signal input, the speaker mode is entered; when it is detected that the electrical signal input end of the acoustic-electric bidirectional transducer has no electrical signal input, the microphone mode is entered. . The details are not listed here.

S12. When entering the speaker mode, the acoustic-electric two-way transducer is controlled to receive an electrical signal, and the electrical signal is converted into a sound signal and then output.

When entering the speaker mode, the acoustic-electric bidirectional transducer becomes an electroacoustic transducer that can convert an electrical signal into a sound signal, and an electrical signal transmitted by another sound processing unit (such as a digital-to-analog converter) of the receiving terminal, and passes through the electricity. Magnetic induction (or other conversion principle of related art) converts an electrical signal into a sound signal, outputs it, and plays a sound to realize a speaker function.

S13. When entering the microphone mode, control the acoustic-electric bidirectional transducer to collect the sound signal, and convert the sound signal into an electrical signal and output the sound signal.

When entering the microphone mode, the acoustic-electric bidirectional transducer is converted into an acoustic-electrical converter that can convert the sound signal into an electrical signal, collects the sound signal, and converts the sound signal into electromagnetic signal (or other conversion principle of related art) After the electrical signal is output, the other sound processing unit of the terminal processes the electrical signal output by the acoustic-electric bidirectional transducer (such as analog-to-digital conversion) and stores it as a recording file or transmits it to an external device to realize the microphone function.

Optionally, the electrical signal output by the acoustic-electric bidirectional transducer is further amplified to adjust the gain of the electrical signal to achieve a signal enhancement effect while maintaining a signal-to-noise ratio (SNR).

Optionally, the amplified processed electrical signal is further optimized, including echo suppression, noise cancellation, and broken sound protection to improve signal quality.

Optionally, the acoustic-electric bidirectional transducer comprises a moving coil transducer, which can directly adopt a moving coil transducer of a conventional moving coil speaker or a moving coil microphone, or can be appropriately modified. The moving coil transducer includes a magnetic circuit system and a vibration system, and collects a sound signal or an output sound signal through a vibration system, realizes electromagnetic induction through cooperation of a magnetic circuit system and a vibration system, and realizes acoustic-electric conversion and electro-acoustic conversion through electromagnetic induction.

Those skilled in the art can understand that other structures in the related art (such as a transformer structure) can be used in addition to the transducers of the moving coil structure, as long as the two-way conversion of acoustic and electrical sounds can be realized.

The above method can be implemented by a terminal.

The sound processing method of the embodiment of the invention realizes the speaker function by performing electro-acoustic conversion through the acoustic-electric two-way transducer in the speaker mode by switching between the speaker mode and the microphone mode, and the two-way transduction by the sound and electricity in the microphone mode Acousto-electrical conversion to realize the microphone function, so that Yang The sound function and the microphone function are combined, which is equivalent to the speaker and the microphone multiplexing one transducer, thereby reducing the components in the terminal, thereby reducing the space occupied, and facilitating the miniaturization of the terminal, especially the mobile terminal. And greatly reduce the cost.

Referring to FIG. 4, a sound processing apparatus according to an embodiment of the present invention is provided. The apparatus includes a mode switching module 101, a first processing module 102, a second processing module 103, and an acoustic-electric bidirectional transducer 104, and an acoustic-electric bidirectional transducer 104. It can realize two-way conversion of acoustic and electro-acoustic, among which:

Mode switching module 101: set to switch between speaker mode and microphone mode.

Optionally, the mode switching module 101 is configured to: receive a switching instruction, and switch between a speaker mode and a microphone mode according to the switching instruction. For example, after receiving the switching command, it is judged whether it is currently in the speaker mode or the microphone mode; when in the speaker mode, it is switched from the speaker mode to the microphone mode; when in the microphone mode, it is switched from the microphone mode to the speaker mode. For another example, the switching instruction includes a first switching instruction and a second switching instruction. When the first switching instruction is received, the speaker mode is entered; when the second switching instruction is received, the microphone mode is entered.

Optionally, the mode switching module 101 is configured to: detect a current working state, and switch between a speaker mode and a microphone mode according to the working state. For example, the working state includes a first working state and a second working state, and when it is detected that it is currently in the first working state (such as a video playing state, a music playing state, a recording playing state, a ringing state, etc.), entering the speaker mode; When it is detected that it is currently in the second working state (such as recording state, call state, etc.), it enters the microphone mode. The mode switching module 101 can judge the working state by detecting the currently enabled application.

In addition, the mode switching module 101 can also be configured to implement switching of the two modes in other manners. For example, when it is detected that the electrical signal input end of the acoustic-electric bidirectional transducer 104 has an electrical signal input, it enters the speaker mode; when it is detected that the electrical signal input end of the acoustic-electrical bidirectional transducer 104 has no electrical signal input, it enters Microphone mode. The details are not listed here.

In some embodiments, the mode switching module 101 is further configured to: when switching to the speaker mode, turn off the second processing module 103, start the first processing module 102; when switching to the microphone mode, the mode switching module 101 turns off the first The processing module 102 starts the second processing module 103.

In other embodiments, the mode switching module 101 is further configured to: when switching to the speaker mode, disconnect the second processing module 103 and the acoustic electricity to implement the transducer 104, connect the first processing module 102 and the sound and power bidirectional The transducer 104; when switching to the microphone mode, the mode switching module 101 The connection of the first processing module 102 and the acoustic-electric bidirectional transducer 104 is disconnected, and the second processing module 103 and the acoustic-electric bidirectional transducer 104 are connected. At this time, the acoustic-electric bidirectional transducer 104 can be connected to the first processing module 102 and the second processing module 103 through a single-pole double-throw switch, and the mode switching module 101 realizes the acoustic-electric bidirectional transducer by controlling the single-pole double-throw switch. The disconnection and communication with the first processing module 102 and the second processing module 103 are 104.

The first processing module 101 is configured to control the acoustic-electric bidirectional transducer 104 to receive an electrical signal when entering the speaker mode, and convert the electrical signal into a sound signal for output.

When entering the speaker mode, the acousto-electric bidirectional transducer 104 becomes an electroacoustic transducer that can convert an electrical signal into a sound signal.

Optionally, the first processing module 102 is configured to: when entering the speaker mode, send a control signal to the acoustic-electric bidirectional transducer 104, and control the acoustic-electric bidirectional transducer 104 to receive other sound processing units of the terminal (eg, digital-analog The electrical signal transmitted by the converter and converted into an acoustic signal by electromagnetic induction (or other conversion principle of the related art), outputted, and played a sound to realize a speaker function.

Optionally, the first processing module 102 is configured to: when entering the speaker mode, receive an electrical signal transmitted by another sound processing unit (such as a digital-to-analog converter) of the terminal, and transmit the electrical signal to the acoustic-electric bidirectional transducer. 104. The acoustic-electric bidirectional transducer 104 receives the electrical signal and converts the electrical signal into a sound signal by electromagnetic induction (or other conversion principle of the prior art), outputs the sound, and plays the sound to realize the speaker function.

The second processing module 103 is configured to control the acoustic-electric bidirectional transducer 104 to collect a sound signal when entering the microphone mode, and convert the sound signal into an electrical signal and output the sound signal.

Upon entering the microphone mode, the acoustic-electric bi-directional transducer 104 transitions to an acoustic-electrical converter that can convert the sound signal into an electrical signal.

Optionally, the second processing module 103 is configured to: when entering the microphone mode, send a control signal to the acoustic electricity implementing transducer 104, control the acoustic electric bidirectional transducer 104 to collect the sound signal, and pass the electromagnetic induction (or related Other conversion principles of the technology) convert the sound signal into an electrical signal and output it.

Optionally, the second processing module 103 is configured to: when entering the microphone mode, receive an electrical signal output by the acoustic-electric bidirectional transducer 104, and transmit the electrical signal to other sound processing units of the terminal, by other sound processing units. Processing the electrical signal output by the acoustic-electric bidirectional transducer (such as analog-to-digital conversion) It is then stored as a recording file or transmitted to an external device to implement the microphone function. In some embodiments, the acoustic-electric bidirectional transducer 104 can also output electrical signals directly to other sound processing units of the terminal.

Optionally, as shown in FIG. 5, the second processing module 103 includes a signal amplifying unit 113 configured to receive an electrical signal output by the acoustic-electric bidirectional transducer 104 and perform amplification processing on the electrical signal. In order to maintain the signal-to-noise ratio (SNR) as much as possible, adjust the gain of the electrical signal to achieve signal enhancement.

Optionally, the second processing unit 103 further includes an optimization processing unit 123, configured to: receive an electrical signal output by the signal amplifying unit, and perform optimization processing on the electrical signal, including echo suppression, noise cancellation, and breaking Sound protection, etc., to improve signal quality, and then output the optimized electrical signal.

The sound processing device of the embodiment of the invention can perform electroacoustic conversion as a speaker to realize a sound playing function, and can also perform sound and electric conversion as a microphone to realize a sound recording function.

As shown in FIG. 6, it is a schematic diagram of signal transmission when the sound processing apparatus of one embodiment is used as a speaker. The first processing module 102 receives the electrical signals output by the other sound processing units of the terminal, and outputs the electrical signals to the acoustic-electric bidirectional transducer 104. The acoustic-electric bidirectional transducer 104 converts the electrical signals into sound signals and outputs them. . In this embodiment, the mode switching module 101 may perform mode switching by detecting whether the first processing module 102 receives an electrical signal, and when detecting that the first processing module 102 receives an electrical signal, enter a speaker mode, when detecting the first When the first love module 102 does not receive an electrical signal, it enters the microphone mode.

As shown in FIG. 7, it is a schematic diagram of signal transmission when the sound processing apparatus of one embodiment is used as a microphone. The acoustic-electric bidirectional transducer 104 collects a sound signal, converts the sound signal into an electrical signal, and outputs the sound signal to the second processing module 103. The second processing module 103 performs an amplification and optimization process on the sound signal, and outputs the sound processing to the terminal. unit.

Optionally, the acoustic-electric bidirectional transducer 104 includes a moving coil transducer, which can directly adopt a moving coil transducer of a conventional moving coil speaker or a moving coil microphone, or can be appropriately modified. The moving coil transducer includes a magnetic circuit system and a vibration system, and collects a sound signal or an output sound signal through a vibration system, realizes electromagnetic induction through cooperation of a magnetic circuit system and a vibration system, and realizes acoustic-electric conversion and electro-acoustic conversion through electromagnetic induction.

The sound processing device of the embodiment of the present invention realizes the speaker function by performing electro-acoustic conversion through the acoustic-electric bidirectional transducer 104 in the speaker mode by switching between the speaker mode and the microphone mode, and bidirectionally changing through the sound and electricity in the microphone mode. The energy converter 104 performs the sound and electric conversion to realize the microphone function, so that the speaker function and the microphone function are combined, which is equivalent to the speaker and the microphone multiplexing one transducer, thereby reducing the components in the terminal, thereby reducing the space occupied, It is conducive to the miniaturization of terminals, especially mobile terminals, and greatly reduces the cost.

The sound processing device of the embodiment of the invention can be applied to mobile terminals such as mobile phones and tablets, and can also be applied to fixed terminals such as computers and televisions.

Taking a mobile phone as an example, a mobile-type speaker and a capacitive or column-level microphone are generally used in the mobile phone. With the sound processing device of the embodiment of the present invention, the transducer of the capacitive or column-level microphone can be omitted, and only the movable The moving coil transducer of the ring speaker is optimized and modified, so that the speaker and the microphone are multiplexed to optimize the modified moving coil transducer, and the optimized modified moving coil transducer can be described as the above embodiment. Acoustic and electric bidirectional transducer.

The moving coil transducer is shown in Figure 1. When optimizing it, it can be started from the following aspects: adjusting the damping characteristics of the folding system 20 and the fixed chip 50 of the vibration system to increase the sensitivity; The magnetic field strength H of the permanent magnet 70, the magnetic permeability η of the magnetic conductive plate 80, and the magnetic induction B of the coil 60 are adjusted, and the direction of the adjustment is to increase the values of H, η, and B in order to increase the magnetic flux Φ of the coil moving region. Therefore, the force F received by the coil in the magnetic field and the induced current i generated after the coil cuts the magnetic field satisfy the requirements of electroacoustic conversion or acoustic-electric conversion as much as possible.

The equation for electroacoustic conversion is:

F=BLi (Formula 1)

The sound field equation is:

among them:

γ: ratio of constant pressure specific heat capacity to constant volume specific heat capacity, constant 1.40 in air;

P ₀ : a standard atmospheric pressure, constant at a normal temperature of 25 ° C;

p: the sound pressure that the diaphragm 10 is subjected to;

ρ ₀ : air density, constant at a normal temperature of 25 ° C;

v: diaphragm 10 moving speed;

t: diaphragm 10 moving time;

L: diaphragm 10 motion vector = (x, y, z);

In addition, the two physical quantities v and t can be artificially set in the simulation, which can be accurately measured by the laser range finder in the actual measurement; the actual moving distance of the center point of the diaphragm is measured by the laser range finder to be x; The sound source is simplified, and y=0 and z=0 can be considered;

Bring F=BLi as the acoustic pressure p into Equation 2, and introduce the formula of the second-order partial derivative equation:

The formula is a second-order partial derivative function relationship of i and x;

Using Equation 3, the two physical quantities of the displacement point x of the diaphragm and the induced current i in the coil can be obtained, thereby establishing the mathematical basis for the sensitivity adjustment of the vibration system of the transducer:

1 If the final induced current i is too small, the minimum distance x of the diaphragm to drive the coil to cut the magnetic induction line is reversed by using Equation 3 under the condition of increasing i;

2 Calculate the force F that the coil is subjected to at this time by Equation 1;

3 Examine the acoustic components of the three physical quantities i, x and F to see if they meet every constraint index of material mechanics (such as life, stress, etc.);

4 Re-use the simulation or physical test for acoustic verification to verify whether the design of each acoustic indicator achieves the necessary acoustic-electric conversion effect.

Specifically, how to perform the verification of the acoustic components of the three physical quantities of i, x, and F can be implemented by using a well-known technique of those skilled in the art, and is not intended to limit the scope of protection of the present invention, and details are not described herein again.

According to the above optimization and transformation principle, the moving coil transducer shown in FIG. 1 can be modified as follows:

1) replacing the material of the paper cone 30 and the dust cap 40 with a lighter and thinner material to reduce the weight of the diaphragm, so as to increase the distance that the diaphragm 10 drives the coil 60 to cut the magnetic field magnetic field under the same sound pressure;

2) reducing the damping coefficient of the folding ring 20 and the fixed chip 50 to increase the sensitivity of the vibration system to increase the distance that the diaphragm 10 drives the coil 60 to cut the magnetic field magnetic field under the same sound pressure;

3) Adjusting the magnetic permeability of the magnetic conductive plate 80 in the magnetic circuit system, or adjusting the magnetic field strength of the permanent magnet 70, and maintaining the path distance of the coil during the electroacoustic conversion work after satisfying the acoustic-electrical conversion requirement, that is, the diaphragm 10 The vibration stroke x.

The above adjustments are based on the principles of Equation 1 and Equation 3. At the same time, it is necessary to repeatedly simulate and measure the parameters to optimize the performance requirements of electroacoustic conversion, and provide sufficient sensitivity to complete the acoustic-electric conversion. Features.

By using the sound processing device and method of the embodiment of the invention, the moving coil transducer of the moving coil speaker of the existing mobile phone can be optimized and modified, and the utility model can be modified to meet the performance requirements of the electroacoustic conversion, and Acoustic-electric bidirectional transducer that satisfies the performance requirements of acoustic-electrical conversion, and provides a function of switching between a speaker mode and a microphone mode, and an electroacoustic conversion through a sound-electric two-way transducer in a speaker mode to realize a speaker function in a microphone In the mode, the acoustic-electrical conversion is realized by the acoustic-electric two-way transducer, so that the speaker function and the microphone function are combined, so that the speaker and the microphone are multiplexed with one transducer, and the cost-effective capacitive type in the mobile phone is omitted. Or a transducer of a column-level microphone. It not only reduces the cost, but also saves space, which is conducive to the development of thin and light mobile phones, or to use the free space to place other devices to add more functions to the mobile phone.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions for performing any of the methods described above.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware, but in many cases, the former is A better implementation. Based on this understanding, this The technical solution of the invention may be embodied in the form of a software product stored in a storage medium (such as a read only memory (ROM) or a random memory). In a memory (RAM, Random Access Memory), a disk, an optical disk, including a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute various embodiments of the present invention Said method.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program in a storage and a memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

The alternative embodiments of the invention have been described above with reference to the drawings, and are not intended to limit the scope of the invention. A person skilled in the art can implement the invention in various variants without departing from the scope and spirit of the invention. For example, the features of one embodiment can be used in another embodiment to obtain a further embodiment. Any modifications, equivalent substitutions and improvements made within the technical concept of the invention are intended to be included within the scope of the invention.

Industrial applicability

The above technical solution reduces the occupied space of the transducer, facilitates the miniaturization of the terminal, especially the mobile terminal, and greatly reduces the cost.

Claims

A sound processing method comprising the steps of:

Switch between speaker mode and microphone mode;

When entering the speaker mode, controlling the acoustic-electric bidirectional transducer to receive an electrical signal, and converting the electrical signal into a sound signal for output;

When entering the microphone mode, the acoustic-electric bidirectional transducer is controlled to collect a sound signal, and the sound signal is converted into an electrical signal and then output.
The sound processing method according to claim 1, wherein the switching between the speaker mode and the microphone mode comprises: receiving a switching instruction to switch between a speaker mode and a microphone mode according to the switching instruction.
The sound processing method according to claim 1, wherein said switching between the speaker mode and the microphone mode comprises: detecting a current operating state, and switching between the speaker mode and the microphone mode according to the operating state.
The sound processing method according to any one of claims 1 to 3, further comprising:

After the step of converting the sound signal into an electrical signal and outputting the signal, the electrical signal output by the acoustic-electric bidirectional transducer is amplified.
The sound processing method according to any one of claims 1 to 3, wherein the acoustic-electric bidirectional transducer comprises a moving coil transducer.
A sound processing device includes a mode switching module, a first processing module, a second processing module, and an acoustic-electric bidirectional transducer, wherein:

The mode switching module is configured to switch between a speaker mode and a microphone mode;

The first processing module is configured to, when entering the speaker mode, control the acoustic-electric bidirectional transducer to receive an electrical signal, and convert the electrical signal into a sound signal for output;

The second processing module is configured to control the acoustic-electric bidirectional transducer to collect a sound signal when entering the microphone mode, and convert the sound signal into an electrical signal and output the sound signal.
The sound processing device according to claim 6, wherein the mode switching module is configured to: receive a switching instruction, and between the speaker mode and the microphone mode according to the switching instruction Line switching.
The sound processing device according to claim 6, wherein the mode switching module is configured to detect a current operating state and switch between a speaker mode and a microphone mode according to the operating state.
The sound processing device according to any one of claims 6-8, wherein the second processing module comprises a signal amplifying unit, the signal amplifying unit is configured to receive an electrical signal output by the acoustic-electric bidirectional transducer And amplifying the electrical signal.
A sound processing device according to any of claims 6-8, wherein the acoustic-electric bidirectional transducer comprises a moving coil transducer.