WO2019042459A1

WO2019042459A1 - Digital headset

Info

Publication number: WO2019042459A1
Application number: PCT/CN2018/103944
Authority: WO
Inventors: 蔡焱
Original assignee: 深圳市硕泰华科技有限公司
Priority date: 2017-09-04
Filing date: 2018-09-04
Publication date: 2019-03-07

Abstract

Disclosed is a digital headset. The digital headset comprises an audio input module, a microprocessor, a digital signal processor, and an audio output module. The audio input module comprises a primary microphone and a secondary microphone. The primary microphone is configured to receive a first sound signal comprising a first voice signal and a first environmental noise signal, and the secondary microphone is configured to obtain a second sound signal comprising a second environmental noise signal. The microprocessor is configured to communicate with a terminal device via a USB Audio protocol, and generate, according to a noise reduction command input by a user, a noise reduction control instruction such that a noise reduction unit in the digital signal processor is controlled to analyze and process the second environmental noise signal to obtain a noise reduction signal having a same magnitude but opposite phase with respect to the second environmental noise signal, and cancel the noise reduction signal by using the first environmental noise signal so as to obtain a noise-reduced first sound signal, and output the same through the audio output module. The digital headset ensures fidelity of a first voice signal in use and improves sound quality of an output signal.

Description

Digital earphone

The present application claims priority to Chinese Patent Application No. PCT Application No. No. No. No. No. No. No. No. No. No. No. No. No. No.

The present application claims priority to Chinese Patent Application Serial No. No. No. No. No. No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The embodiments of the present application relate to the field of digital earphones, and in particular, to a digital earphone.

Background technique

Digital earphones are earphones designed with digital interfaces, such as earphones designed with iPHone's Lightning interface or Microphone interface for Android phones. Digital headphones come with DAC and amplifier, which can play ultra-high-rate lossless music, while mobile phones only use For digital signal output and power supply.

The digital earphone in the prior art has only one microphone, and the noise signal and the user's sound signal are input from one microphone, and the quality of the user's sound signal is also impaired in the process of noise reduction processing.

Therefore, how to provide a digital earphone that solves the above technical problems has become a problem that a person skilled in the art needs to solve at present.

Summary of the invention

The purpose of the embodiment of the present application is to provide a digital earphone, which ensures the fidelity of the first voice signal of the user in the first sound signal during use, and improves the output signal while avoiding damage to the first voice signal of the user. The sound quality.

To solve the above technical problem, an embodiment of the present application provides a digital earphone, including an audio input module, a microprocessor, a digital signal processor, and an audio output module; the audio input module includes a primary microphone and a slave microphone, the number The signal processor includes a noise reduction unit;

The primary microphone is configured to receive a first sound signal, where the first sound signal includes a first voice signal of the user and a first ambient noise signal;

The slave microphone is configured to acquire a second sound signal, and the second sound signal includes a second ambient noise signal;

The microprocessor is configured to communicate with the terminal device by using a USB Audio protocol, and generate a noise reduction control instruction according to a noise reduction command input by the user;

The noise reduction unit is configured to: after receiving the noise reduction control instruction, perform analysis processing on the second ambient noise signal to obtain a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and The noise reduction signal is cancelled with the first ambient noise signal to obtain a first noise signal after noise reduction;

The audio output module is configured to output the noise-reduced first sound signal.

Optionally, the first language signal is a singing voice signal; the digital signal processor further includes a reverberation unit and a mixing unit, and the audio input module further includes an audio acquiring unit;

The microprocessor is further configured to generate a reverberation instruction and a hybrid instruction according to a karaoke open command input by the user;

The reverberation unit is configured to perform karaoke reverberation on the denoised vocal signal according to the reverberation command to obtain a reverberation sound signal;

The audio acquiring unit is configured to acquire a music signal output by the terminal device;

The mixing unit is configured to mix the reverberation sound signal and the music signal according to the mixing instruction to obtain a vocal accompaniment mixed sound signal;

The audio output module is further configured to output the vocal accompaniment mixed sound signal.

Optionally, it also includes:

An acquisition rate acquisition module, configured to acquire a corresponding sampling rate according to the music digital signal output by the terminal device;

An adjustment module, configured to generate a frequency adjustment instruction according to the USB Audio protocol and the sampling rate;

The microprocessor is further configured to perform corresponding adjustment on its operating frequency according to the frequency adjustment instruction.

Optionally, the USB Audio protocol is a USB Audio Class 1.0 protocol, a USB Audio Class 2.0 or a USB Audio Class 3.0 protocol.

Optionally, in the digital earphone as described above, the main microphone is a plurality, and the plurality of the main microphones constitute a microphone array.

Optionally, the slave microphones are multiple, and the plurality of slave microphones are distributed.

To solve the above technical problem, the present application provides a digital earphone including an audio input module, a microprocessor, a digital signal processor and an audio output module; the audio input module includes a master microphone and a slave microphone, and the digital signal processing The device includes a noise reduction unit, and an output end of the main microphone and an output end of the slave microphone are connected to an input end of the noise reduction unit, and a control end of the noise reduction unit and an output end of the microprocessor Connecting, the output end of the noise reduction unit is connected to the audio output module;

The primary microphone is configured to receive a first sound signal, the first sound signal includes a first voice signal of the user and a first ambient noise signal; the slave microphone is configured to acquire a second sound signal, the second The sound signal includes a second environmental noise signal; the microprocessor is configured to communicate with the terminal device through a USB Audio protocol, and generate a noise reduction control command according to a noise reduction command input by the user; the noise reduction unit is configured to receive After the noise reduction control command, analyzing the second ambient noise signal to obtain a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and the noise reduction signal and the An ambient noise signal is cancelled to obtain a noise-reduced first sound signal; and the audio output module is configured to output the noise-reduced first sound signal.

Optionally, the digital signal processor further includes a reverberation unit and a mixing unit, the audio input module further includes an audio acquisition unit; an input end of the reverberation unit is connected to an output end of the noise reduction unit, a control end is connected to an output end of the microprocessor, an output end thereof is connected to a first input end of the mixing unit; a second input end of the mixing unit is connected to an output end of the audio acquisition unit, and the control thereof is controlled The end is connected to the output end of the microprocessor, and the output end thereof is connected to the audio output module; the input end of the audio acquiring unit is connected to the output end of the terminal device;

The microprocessor is further configured to generate a reverberation command and a hybrid command according to a karaoke open command input by the user; the reverberation unit is configured to perform karaoke on the denoised first voice signal according to the reverberation command OK reverberation, obtaining a reverberation sound signal; the audio acquisition unit, configured to acquire a music signal output by the terminal device; the mixing unit, configured to: the reverberation sound signal and the music signal according to the mixing instruction Mixing to obtain a vocal accompaniment mixed sound signal; the audio output module is further configured to output the vocal accompaniment mixed sound signal.

Optionally, the method further includes an acquisition rate acquisition module and an adjustment module, where an input end of the acquisition rate acquisition module is connected to an output end of the terminal device, and an output end thereof is connected to an input end of the adjustment module; The output is connected to the input of the microprocessor;

The acquisition rate acquisition module is configured to obtain a corresponding sampling rate according to the music digital signal output by the terminal device; the adjustment module is configured to generate a frequency adjustment instruction according to the USB Audio protocol and the sampling rate; The microprocessor is further configured to adjust the operating frequency of the user according to the frequency adjustment instruction.

The embodiment of the present application provides a digital earphone, including an audio input module, a microprocessor, a digital signal processor, and an audio output module. The audio input module includes a primary microphone and a secondary microphone, and the digital signal processor includes a noise reduction unit. a first sound signal, the first sound signal comprising a first voice signal of the user and a first ambient noise signal; a slave microphone for acquiring a second sound signal, the second sound signal comprising a second ambient noise signal; The processor is configured to communicate with the terminal device through the USB Audio protocol, and generate a noise reduction control instruction according to the noise reduction command input by the user; the noise reduction unit is configured to receive the noise reduction control instruction, and analyze the second environmental noise signal Processing a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and canceling the noise reduction signal and the first ambient noise signal to obtain a first noise signal after noise reduction; and an audio output module for The first sound signal after noise reduction is output.

The digital earphone in the embodiment of the present application adopts a master and slave sets of microphones, and the microprocessor controls the noise reduction unit in the data signal processor according to the second sound signal acquired from the microphone after receiving the noise reduction command input by the user. The second ambient noise signal generates a corresponding noise reduction signal, and cancels the first environmental noise signal in the sound signal acquired by the main microphone through the noise reduction signal, so as to perform noise reduction processing on the first sound signal, ensuring the first The fidelity of the user's first speech signal in a sound signal improves the sound quality of the output signal while avoiding damage to the user's first speech signal.

The embodiment of the present application provides a digital earphone, including an audio input module, a microprocessor, a digital signal processor, and an audio output module. The audio input module includes a primary microphone and a secondary microphone, and the digital signal processor includes a noise reduction unit. The output end and the output end of the slave microphone are connected to the input end of the noise reduction unit, the control end of the noise reduction unit is connected with the output end of the microprocessor, and the output end of the noise reduction unit is connected with the audio output module; the main microphone is used Receiving a first sound signal, the first sound signal comprising a first voice signal of the user and a first ambient noise signal; a slave microphone for acquiring a second sound signal, the second sound signal comprising a second ambient noise signal; The method is used for communicating with the terminal device through the USB Audio protocol, and generating a noise reduction control command according to the noise reduction command input by the user; the noise reduction unit is configured to receive the noise reduction control command, and then analyze and process the second environmental noise signal. a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and the noise reduction signal and the first environmental noise signal Performing cancellation to obtain a noise-reduced first sound signal; and an audio output module for outputting the noise-reduced first sound signal.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the prior art and the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present application. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic diagram of a principle of a digital earphone according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another digital headset provided by an embodiment of the present application.

Detailed ways

The embodiment of the present application provides a digital earphone, which ensures the fidelity of the first voice signal of the user in the first sound signal during use, and improves the output signal while avoiding the damage of the first voice signal of the user. Sound quality.

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Please refer to FIG. 1 , which is a schematic diagram of a digital earphone according to an embodiment of the present application.

The digital earphone comprises an audio input module 1, a microprocessor 2, a digital signal processor 3 and an audio output module 4; the audio input module 1 comprises a master microphone 11 and a slave microphone 12, and the digital signal processor 3 comprises a noise reduction unit 31; The output end of the microphone 11 and the output end of the slave microphone 12 are both connected to the input end of the noise reduction unit 31, the control end of the noise reduction unit 31 is connected to the output end of the microprocessor 2, and the output end of the noise reduction unit 31 and the audio output are connected. Module 4 is connected;

The main microphone 11 is configured to receive a first sound signal, where the first sound signal includes a first voice signal of the user and a first ambient noise signal;

From the microphone 12, for acquiring a second sound signal, the second sound signal comprising using a second ambient noise signal;

The microprocessor 2 is configured to communicate with the terminal device through the USB Audio protocol, and generate a noise reduction control command according to the noise reduction command input by the user;

The noise reduction unit 31 is configured to: after receiving the noise reduction control instruction, analyze and process the second ambient noise signal to obtain a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and the noise reduction signal and the first environment The noise signal is cancelled to obtain a first sound signal after noise reduction;

The audio output module 4 is configured to output the noise-reduced first sound signal.

It should be noted that the main microphone 11 in the digital earphone provided by the present application is disposed at a position closer to the mouth of the user, so as to obtain a clear user voice signal acquired by the user, which is acquired by the main microphone 11 during use. The first sound signal is mainly composed of the user's first sound signal, and of course includes a certain first ambient noise signal; the microphone 12 is disposed at other positions of the digital earphone (a position far from the user's mouth), and is in use. The second sound signal obtained at the time mainly includes a second environmental noise signal, and may of course include a certain user second language signal, wherein the first sound signal and the second sound signal are the same as the master microphone 11 and the slave microphone 12 At the same time, since the main microphone 11 is disposed at a position closer to the mouth of the user, the microphone 12 is disposed at other positions of the earphone, so the intensity of the first language signal acquired by the main microphone 11 at the same time should be greater than that from the microphone 12. The acquired second language signal.

After receiving the noise reduction command issued by the user, the microprocessor 2 (ie, the MCU (Micro Controller Unit)) generates a noise reduction control command to control the digital signal processor 3 (ie, DSP (Digital Signal Processing)). The noise reduction unit 31 analyzes the sound signals acquired by the main microphone 11 and the slave microphone 12 by active noise reduction, and generates the same amplitude and opposite phase by the second environmental noise signal acquired from the microphone 12. Denoising the signal, and using the noise reduction signal to cancel the first ambient noise signal acquired by the main microphone 11, thereby reducing or eliminating the first environmental noise signal in the first sound signal acquired by the main microphone 11 to the user The influence of a voice signal makes the voice of the user more clear when talking or singing. Among them, since the ambient noise signal is mainly used in the second sound signal acquired from the microphone 12, the second environmental noise signal can be used as a basis. The first environmental noise signal in the main microphone 11 performs noise reduction processing, so that the first language signal acquired by the main microphone 11 can be prevented from being damaged.

It should be noted that the user can issue a noise reduction command through the noise reduction switch on the line controller of the earphone, that is, the noise reduction switch is turned on, and the microprocessor 2 can receive the noise reduction command input by the user, or the manner of inputting through the language. Release the noise reduction command.

Specifically, the digital earphone provided by the embodiment of the present application can be connected to a terminal device (such as a mobile phone or a tablet computer) through a digital interface, and the digital interface can be a Lighting interface, a USB Micro interface, or a USB Trpe C interface, and what interface is specifically used. It can be determined according to the specific terminal device, for example, it can be connected to the iPhone through the Lighting interface.

In addition, the microprocessor 2 in the digital earphone communicates with the terminal device through the USB Audio protocol, wherein the USB Audio protocol can be the USB Audio Class 1.0 protocol, the USB Audio Class 2.0 or the USB Audio Class 3.0 protocol, and the USB Audio Class 2.0 or The USB Audio Class 3.0 protocol can greatly improve the compatibility between digital headsets and end devices. Certainly, the specific protocol used in the actual application may be determined according to the actual situation, and the embodiment of the present application does not specifically limit this.

In practical applications, the microprocessor 2 in the embodiment of the present application can adopt an ARM architecture and an ultra-low power MCU, mainly because the ARM architecture and the ultra-low power MCU have strong processing capabilities and can support up to 24 bits. /192Khz sampling rate for high quality / lossless music playback. The digital signal processor 3 in the embodiment of the present application can employ a 32-bit floating point low power digital signal processor 3. Of course, the MCU and the digital signal processor 3 are specifically used in the embodiment of the present application, and the purpose of the embodiment of the present application can be achieved.

It should be noted that the number of the primary microphone 11 and the secondary microphone 12 in the digital earphone provided by the embodiment of the present application may be one or more, and the specific quantity may be determined according to actual conditions to ensure high quality. The main signal 11 and the slave microphone 12 are used simultaneously with the sound signal to further reduce the power consumption of the microprocessor 2.

The embodiment of the present application discloses a digital earphone. Compared with the previous embodiment, the technical solution is further illustrated and optimized in this embodiment. For details, please refer to FIG. 2 , which is a schematic diagram of another digital earphone according to an embodiment of the present application.

It should be noted that in addition to using a digital headset to conduct a call, the user may also need to use a digital earphone to listen to music or sing karaoke, in order to better meet the user's needs, further, the first language signal is a singing voice signal; digital signal The processor 3 further includes a reverberation unit 32 and a mixing unit 33. The audio input module 1 further includes an audio acquisition unit 13; the input end of the reverberation unit 32 is connected to the output end of the noise reduction unit 31, and the control terminal and the microprocessor 2 The output terminal is connected, the output end thereof is connected to the first input end of the mixing unit 33; the second input end of the mixing unit 33 is connected to the output end of the audio acquiring unit 13, and the control end thereof is connected to the output end of the microprocessor 2, The output end is connected to the audio output module 4; the input end of the audio acquisition unit 13 is connected to the output end of the terminal device; the microprocessor 2 is further configured to generate a reverberation command and a hybrid command according to the karaoke open command input by the user; The sounding unit 32 is configured to perform karaoke reverberation on the noise-reduced singing voice signal according to the reverberation command to obtain a reverberation sound signal; and the audio acquiring unit 13 is configured to obtain Taking the music signal output by the terminal device; the mixing unit 33 is configured to mix the reverberation sound signal and the music signal according to the mixing instruction to obtain a vocal accompaniment mixed sound signal; and the audio output module 4 is further configured to mix the sound signal with the vocal accompaniment Make the output.

Specifically, the digital earphone can be connected to the terminal device through a digital interface. When the user wants to sing karaoke, the karaoke open command can be manually (or voice) input through the wire controller or software, and the audio in the audio input module 1 is input. The obtaining unit 13 acquires a music signal (specifically, an accompaniment audio signal) output by the terminal device (such as a mobile phone), and reverberates the vocal signal after the noise reduction process with the karaoke through the reverberation unit 32 in the digital signal processor 3, and then By mixing the reverberation singing voice signal (ie, the reverberation sound signal) with the acquired accompaniment audio signal by the mixing unit 33, a relatively high-quality singing voice signal with karaoke and accompaniment music can be obtained through the audio output module. 4 The sound signal is outputted, so that the user can hear his own singing voice (that is, the singing voice with karaoke and accompaniment music), and it should be noted that the mixing unit 33 in the present application can specifically adopt the vocal accompaniment mixing. The sound power amplifier circuit is implemented, and in the specific implementation, the user's singing voice can be converted into a digital signal through the pickup on the earphone, and passed through The ringing unit 32 reverberates the digital signal and the corresponding karaoke signal, and then mixes the reverberated digital signal with the accompaniment audio signal (corresponding digital signal) through the corresponding mixing unit 33, and then the user can access the earphone. I can hear the mixing effect of my singing and accompaniment. Of course, I can also transfer the digital signal mixed by singing and accompaniment to the corresponding terminal device, and save or upload it through the terminal device.

As a specific embodiment, the digital earphone further includes an acquisition rate acquisition module and an adjustment module. The input end of the acquisition rate acquisition module is connected to the output end of the terminal device, and the output end thereof is connected to the input end of the adjustment module; the output of the adjustment module is adjusted. The end is connected to the input of the microprocessor 2; wherein:

The acquisition rate acquisition module is configured to obtain a corresponding sampling rate according to the music digital signal output by the terminal device;

The adjustment module is configured to generate a frequency adjustment instruction according to the USB Audio protocol and the sampling rate;

The microprocessor 2 is further configured to adjust the operating frequency of the device according to the frequency adjustment command.

It can be understood that when the user listens to music with headphones, the operating frequency required by the microprocessor 2 can be different for music of different sampling rates, but the work of the microprocessor 2 used in the digital headphones of the prior art works. The frequency is constant and cannot be adjusted according to the adoption rate of music, so the power consumption of the microprocessor 2 in the prior art is high. In the embodiment of the present application, the music digital signal output by the terminal device may be sampled, and the corresponding sampling rate is obtained according to the music digital signal output by the terminal device, and the frequency adjustment instruction may be generated according to the USB Audio protocol and the sampling rate, thereby making the micro The processor 2 adjusts its own operating frequency according to the frequency adjustment command.

Because the digital earphone and the mobile phone in the embodiment of the present application can communicate through the protocol of USB Audio Class 1.0, 2.0 or 3.0, the corresponding frequency adjustment instruction can be generated based on the USB Audio protocol to further determine the working state of the MCU/ frequency. In general, the operating frequency of the MCU can be changed step by step in units of 12 MHz.

For example, when the terminal device (taking the mobile phone as an example) does not start playing music, but the APP that needs to use the earphone is already working, the MCU in the digital earphone can adjust the working frequency to the lowest working frequency according to the corresponding frequency adjustment instruction (for example, 12MHz, power consumption is about 1.2 mA); when the music played by the mobile phone is 16bit/48KHz, the corresponding frequency adjustment command can be generated according to the USB Audio protocol, and the working frequency of the MCU is set to 24MHz. The power consumption of the MCU is about 2.4 mAh; when the music played by the mobile phone is a sampling rate of 24 bits/96 kHz, the operating frequency of the MCU can be adjusted to 48 MHz according to the corresponding sampling rate, and the power consumption of the MCU is correspondingly increased to 4.8. mAh; when the mobile phone is playing 24 bits / 192KHz lossless music, then the operating frequency of the MCU can be raised to 96MHz, at this time the MCU power consumption reaches 9.6 mA.

Specifically, the USB Audio protocol is USB Audio Class 1.0, USB Audio Class 2.0 protocol or USB Audio Class 3.0 protocol.

It should be noted that the USB Audio Class 2.0 or USB Audio Class 3.0 protocol can greatly improve the compatibility between digital headphones and terminal devices. Certainly, the specific protocol used in the actual application may be determined according to the actual situation, and the embodiment of the present application does not specifically limit this.

More specifically, as the digital earphone described above, the main microphone 11 is plural, and the plurality of main microphones 11 constitute a microphone array.

Optionally, there are a plurality of slaves 12 and a plurality of slaves 12 are distributed.

It should be noted that, in the digital earphone of the present application, a plurality of master microphones 11 and a plurality of slave microphones 12 may be disposed, and a plurality of master microphones 11 form a microphone array, and the corresponding algorithm is designed to improve the recognition degree of the user voice signal, thereby obtaining A clearer user voice signal, the plurality of slave microphones 12 are respectively disposed at different positions, so that the ambient noise signal in the acquired second sound signal is more comprehensive, and further, the specific algorithm pair in the digital signal processor 3 can be set. The sound signals respectively obtained from the microphone 12 and each of the main microphones 11 are subjected to analysis processing to better eliminate environmental noise signals (for example, low-mid frequency sound signals), thereby obtaining a higher quality user voice signal.

For example, four main microphones 11 and four slave microphones 12 may be provided in a specific implementation. Of course, not only the four main microphones 11 and four slave microphones 12 are provided, but the number of master microphones 11 and the number of slave microphones 11 are not limited. It must be the same. For the specific use of several main microphones 11 and slave microphones 12, the present application is not limited thereto.

It should be noted that the main microphone 11 in the digital earphone provided by the embodiment of the present application may be disposed separately from the line controller, or may not be separately disposed, and may be determined according to actual conditions.

In addition, the digital earphone in the embodiment of the present application can take power from the terminal device to which it is connected, and directly supply power to the MCU and the DSP according to the USB Audio protocol, without an external battery, thereby avoiding the use of complicated and expensive charging and discharging circuits, thereby reducing The cost of the headset also increases the reliability of the entire digital headset system.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

It should also be noted that in the present specification, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or There is any such actual relationship or order between operations. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

A person skilled in the art will further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate the hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented directly in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

The above description of the disclosed embodiments enables those skilled in the art to make or use the application. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the application is not limited to the embodiments shown herein, but is to be accorded the broadest scope of the principles and novel features disclosed herein.

Claims

A digital earphone, comprising: an audio input module, a microprocessor, a digital signal processor and an audio output module; the audio input module comprises a primary microphone and a secondary microphone, and the digital signal processor comprises a noise reduction unit;

The primary microphone is configured to receive a first sound signal, where the first sound signal includes a first voice signal of the user and a first ambient noise signal;

The slave microphone is configured to acquire a second sound signal, and the second sound signal includes a second ambient noise signal;

The microprocessor is configured to communicate with the terminal device by using a USB Audio protocol, and generate a noise reduction control instruction according to a noise reduction command input by the user;

The noise reduction unit is configured to: after receiving the noise reduction control instruction, perform analysis processing on the second ambient noise signal to obtain a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and The noise reduction signal is cancelled with the first ambient noise signal to obtain a first noise signal after noise reduction;

The audio output module is configured to output the noise-reduced first sound signal.
The digital earphone according to claim 1, wherein the first language signal is a singing voice signal; the digital signal processor further comprises a reverberation unit and a mixing unit, the audio input module further comprising an audio acquisition unit;

The microprocessor is further configured to generate a reverberation instruction and a hybrid instruction according to a karaoke open command input by the user;

The reverberation unit is configured to perform karaoke reverberation on the denoised vocal signal according to the reverberation command to obtain a reverberation sound signal;

The audio acquiring unit is configured to acquire a music signal output by the terminal device;

The mixing unit is configured to mix the reverberation sound signal and the music signal according to the mixing instruction to obtain a vocal accompaniment mixed sound signal;

The audio output module is further configured to output the vocal accompaniment mixed sound signal.
The digital earphone according to claim 2, further comprising:

An acquisition rate acquisition module, configured to acquire a corresponding sampling rate according to the music digital signal output by the terminal device;

An adjustment module, configured to generate a frequency adjustment instruction according to the USB Audio protocol and the sampling rate;

The microprocessor is further configured to perform corresponding adjustment on its operating frequency according to the frequency adjustment instruction.
The digital earphone according to claim 3, wherein the USB Audio protocol is one of a USB Audio Class 1.0 protocol, a USB Audio Class 2.0 or a USB Audio Class 3.0 protocol.
The digital earphone according to any one of claims 1 to 4, wherein the main mic is plural, and the plurality of main mics constitute a mic array.
The digital earphone according to claim 5, wherein said slave microphones are plural, and said plurality of slave microphones are distributed.
A digital earphone, comprising: an audio input module, a microprocessor, a digital signal processor and an audio output module; the audio input module comprises a primary microphone and a secondary microphone, and the digital signal processor comprises a noise reduction unit; An output end of the main microphone and an output end of the slave microphone are connected to an input end of the noise reduction unit, and a control end of the noise reduction unit is connected to an output end of the microprocessor, the noise reduction An output of the unit is connected to the audio output module;

The primary microphone is configured to receive a first sound signal, the first sound signal includes a first voice signal of the user and a first ambient noise signal; the slave microphone is configured to acquire a second sound signal, the second The sound signal includes a second environmental noise signal; the microprocessor is configured to communicate with the terminal device through a USB Audio protocol, and generate a noise reduction control command according to a noise reduction command input by the user; the noise reduction unit is configured to receive After the noise reduction control command, analyzing the second ambient noise signal to obtain a noise reduction signal having the same amplitude and opposite phase as the second ambient noise signal, and the noise reduction signal and the An ambient noise signal is cancelled to obtain a noise-reduced first sound signal; and the audio output module is configured to output the noise-reduced first sound signal.
The digital earphone according to claim 7, wherein said digital signal processor further comprises a reverberation unit and a mixing unit, said audio input module further comprising an audio acquisition unit; said input end of said reverberation unit An output end of the noise reduction unit is connected, a control end thereof is connected to an output end of the microprocessor, an output end is connected to a first input end of the mixing unit; a second input end of the mixing unit is An output end of the audio acquisition unit is connected, a control end thereof is connected to an output end of the microprocessor, an output end thereof is connected to the audio output module, and an input end of the audio acquisition unit is connected to an output end of the terminal device ;

The microprocessor is further configured to generate a reverberation command and a hybrid command according to a karaoke open command input by the user; the reverberation unit is configured to perform karaoke on the denoised first voice signal according to the reverberation command OK reverberation, obtaining a reverberation sound signal; the audio acquisition unit, configured to acquire a music signal output by the terminal device; the mixing unit, configured to: the reverberation sound signal and the music signal according to the mixing instruction Mixing to obtain a vocal accompaniment mixed sound signal; the audio output module is further configured to output the vocal accompaniment mixed sound signal.
The digital earphone according to claim 8, further comprising an acquisition rate acquisition module and an adjustment module, wherein an input end of the acquisition rate acquisition module is connected to an output end of the terminal device, and an output end thereof and the adjustment An input end of the module is connected; an output end of the adjustment module is connected to an input end of the microprocessor;

The acquisition rate acquisition module is configured to obtain a corresponding sampling rate according to the music digital signal output by the terminal device; the adjustment module is configured to generate a frequency adjustment instruction according to the USB Audio protocol and the sampling rate; The microprocessor is further configured to adjust the operating frequency of the user according to the frequency adjustment instruction.
The digital earphone according to any one of claims 7-9, wherein the main mic is a plurality, and the plurality of main mics constitute a mic array.
The digital earphone according to claim 10, wherein said slave microphones are plural, and said plurality of slave microphones are distributed.