WO2022105690A1 - 耳机及降噪方法 - Google Patents

耳机及降噪方法 Download PDF

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Publication number
WO2022105690A1
WO2022105690A1 PCT/CN2021/130377 CN2021130377W WO2022105690A1 WO 2022105690 A1 WO2022105690 A1 WO 2022105690A1 CN 2021130377 W CN2021130377 W CN 2021130377W WO 2022105690 A1 WO2022105690 A1 WO 2022105690A1
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module
audio signal
microphone
earphone
noise
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PCT/CN2021/130377
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English (en)
French (fr)
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胡腾飞
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维沃移动通信有限公司
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Publication of WO2022105690A1 publication Critical patent/WO2022105690A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/01—Hearing devices using active noise cancellation

Definitions

  • the present application relates to the technical field of earphones, and in particular, to an earphone and a noise reduction method.
  • Environmental Noise Control refers to the call noise reduction technology that uses data collected by a single or multiple microphones at the upstream end of the call, and after algorithm processing, reduces the environmental noise and preserves the wearer's voice and transmits it to the far end. , so that the other party can hear the call more clearly.
  • ENC Environmental Noise Control
  • TWS True Wireless Stereo
  • at least two audio signals are required. Therefore, at least two microphones (MICs) need to be set on the TWS headset. For example, a voice (Voice) MIC and a feedforward (FeedForward, FF) noise reduction MIC.
  • ANC Active Noise Control
  • the microphone is used to collect ambient noise, and the anti-noise sound wave with the same frequency and amplitude as the noise is emitted through the earphone speaker to achieve phase cancellation by interference with the noise, so as to reduce the wearer's influence from external noise.
  • hybrid (Hybrid) noise reduction is used in related technologies, that is, feedforward noise reduction and feedback (Feedback, FB) noise reduction work together. Therefore, at least FF MIC needs to be set on TWS headphones and FB MIC two microphones.
  • the purpose of the embodiments of the present application is to provide an earphone and a noise reduction method, which can reduce the corresponding cost and power consumption of the earphone.
  • an embodiment of the present application discloses an earphone, comprising: a first microphone, a second microphone, an environmental noise control ENC module, an active noise control ANC module, a first multiplexing module, and a second multiplexing module; the The first multiplexing module is connected to the first microphone, the first multiplexing module is respectively connected to the ENC module and the ANC module; the second multiplexing module is connected to the second microphone, the The second multiplexing module is respectively connected with the ENC module and the ANC module; wherein, the first multiplexing module is used to input the first audio signal collected by the first microphone into the ENC module and the ANC module respectively.
  • the ANC module the second multiplexing module is used to input the second audio signal collected by the second microphone into the ENC module and the ANC module respectively;
  • the ENC module is used to The audio signal and the second audio signal are analyzed and processed to filter out the noise other than the human voice in the first audio signal and the second audio signal, so as to output a third audio signal conforming to the human voice model;
  • the ANC A module for generating and outputting a noise inversion signal based on the inputted first audio signal and the second audio signal.
  • an embodiment of the present application discloses a noise reduction method.
  • the method includes: when performing active noise reduction, according to a first audio signal collected by a first microphone of the earphone and a second audio signal of the earphone.
  • the second audio signal collected by the microphone is analyzed and processed, and the noise other than the human voice in the first audio signal and the second audio signal is filtered out, so as to output the third audio signal conforming to the human voice model;
  • a noise inversion signal is generated based on the first audio signal and the second audio signal.
  • embodiments of the present application provide an electronic device, the electronic device includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being The processor, when executed, implements the steps of the method as described in the second aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the method according to the second aspect is implemented. step.
  • an embodiment of the present application provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement the second aspect the method described.
  • the embodiment of the present application discloses an earphone.
  • the earphone only needs to be provided with two microphones.
  • the first multiplexing module and the second multiplexing module respectively copy the audio signals collected by the two microphones into two identical electrical signals.
  • Input the ENC module and the ANC module respectively for related algorithm processing. Therefore, the ENC function and the ANC function can be simultaneously realized through the two microphones, which reduces the corresponding cost and power consumption of the earphone.
  • FIG. 1 is a schematic structural diagram of an earphone disclosed in an embodiment of the present application.
  • FIG. 2 is another schematic structural diagram of the earphone disclosed in the embodiment of the present application.
  • FIG. 3 is another schematic structural diagram of the earphone disclosed in the embodiment of the present application.
  • FIG. 4 is a schematic diagram of the appearance of the earphone disclosed in the embodiment of the present application.
  • FIG. 5 is a flowchart of a noise reduction method disclosed in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application.
  • FIG. 1 shows a schematic structural diagram of an earphone disclosed in an embodiment of the present application.
  • the earphone mainly includes a first microphone 110 , a second microphone 120 , an ENC module 310 , an ANC module 320 , and a first multiplexing module 210 and a second multiplexing module 220.
  • One end of the first multiplexing module 210 is connected with the first microphone 110, and the other end is connected with the ENC module 310 and the ANC module 320 respectively;
  • a section of the second multiplexing module 220 is connected with the second microphone 120, and the other end is connected with the ENC module 310 and the ANC respectively Module 320 is connected.
  • the earphone in the embodiment of the present application only needs two microphones, and therefore, the earphone may be referred to as dual microphones.
  • the first microphone 110 is used to collect the first audio signal and input the first audio signal to the first multiplexing module 210 .
  • the first multiplexing module 210 is connected to the first microphone 110 for inputting the first audio signal collected by the first microphone 110 into the ENC module 310 and the ANC module 320 respectively.
  • the first multiplexing module 210 can generate two identical signals from the received first audio signal, that is, two channels of the first audio signal, one channel is input to the ENC module 310, and the other channel is input to the ANC module 320.
  • the second microphone 120 is used to collect the second audio signal, and input the collected second audio signal to the second multiplexing module 220 .
  • the second multiplexing module 220 is connected to the second microphone 120 for inputting the second audio signal collected by the second microphone 120 into the ENC module 310 and the ANC module 320 respectively.
  • the second multiplexing module 220 may generate two identical signals from the received second audio signal, that is, two channels of the second audio signal, one of which is input to the ENC module 310 and the other to the ANC module 320 .
  • the ENC module 310 is configured to analyze and process the received first audio signal and the second audio signal, filter out the noise other than the human voice in the first audio signal and the second audio signal, and output a third audio signal conforming to the human voice model , to achieve noise reduction in the uplink of the call.
  • the ANC module 320 is configured to generate and output a noise inversion signal based on the input first audio signal and the second audio signal.
  • the ENC module 310, the ANC module 320, the first multiplexing module 210 and the second multiplexing module 220 may be implemented by a digital signal processing (Digital Signal Processing, DSP for short) chip. Of course, it is not limited to this. In a specific application, it may also be implemented in a manner other than a DSP chip, which is not specifically limited in this embodiment of the present application.
  • DSP Digital Signal Processing
  • the first microphone 110 and the second microphone 120 can realize both the ENC noise reduction of the dual-mic headset and the effect of the hybrid ANC, thereby reducing the cost and power consumption of the headset.
  • the first multiplexing module 210 and the second multiplexing module 220 may be multiplexers (multiplexer, MUX), and the multiplexer is used for duplicating the input signal, and the two output channels are the same electrical signal.
  • multiplexers multiplexer, MUX
  • the headset may further include a codec module 500 and a speaker module 600 , the codec module 500 is connected to the ANC module 320 , and the speaker module 600 is connected to the codec module 500 , the codec module 500 is configured to perform digital-to-analog conversion on the noise inversion signal generated and output by the ANC module 320 , and transmit the converted noise inversion signal to the speaker module 600 for playback.
  • the noise-inverted signal is output to the speaker module 600 for playback, so that the speaker module 600 can play a signal with an inverse phase of the noise, thereby canceling the noise in the audio signal played by the speaker module 600.
  • the speaker module 600 may be a playback device such as a speaker.
  • the headset may further include a wireless transmission module 410, and the wireless transmission module 410 is connected to the codec module 500 and the ENC module 310 for receiving the fourth audio signal, transmit the fourth audio signal to the codec module 500, and transmit the fourth audio signal to the ENC module 310; the ENC module 310 can also be used to use the received fourth audio signal as an echo reference signal, Echo cancellation is performed on the first audio signal and the second audio signal.
  • the codec module 500 may also be configured to perform digital-to-block conversion on the fourth audio signal and then transmit it to the speaker module 600 for playback.
  • the first audio signal and the second audio signal can also be compared according to the fourth audio signal.
  • the echo in the audio signal is canceled, so that the noise in the output third audio signal is smaller.
  • the wireless transmission module 410 may be a Bluetooth module. Of course, it is not limited thereto. In practical applications, the wireless transmission module 410 may also be other short-range wireless transmission modules, which are not limited in the embodiments of the present application.
  • the fourth audio signal may be an audio signal transmitted by the terminal connected to the earphone to the earphone through the transmission module 410.
  • the fourth audio signal may be the music played by the terminal through the audio playback application, or the audio signal transmitted by the call peer to the terminal. Audio signals, etc., are not limited in specific embodiments of the present application.
  • the ENC module 310 may also be configured to output the third audio signal to the codec module 500, and the codec module 500 performs digital-to-analog conversion on the third audio signal, and outputs the converted third audio signal to the speaker module 600 to play.
  • the third audio signal after noise reduction processing by the ENC module 310 is transmitted to the speaker module 600 for playback, so that the user can hear a clearer sound input by the user.
  • the wireless transmission module 410 is further configured to receive the third audio signal output by the ENC module 310, and transmit the third audio signal to the external device.
  • the third audio signal may be a voice signal input by the user after noise reduction by the ENC module 310 during a call.
  • the wireless transmission module 410 transmits the third audio signal to an external device, such as a call terminal, and the call terminal transmits the third audio signal to an external device, such as a call terminal.
  • the three-audio signal is sent to the opposite end of the call, which can improve the clarity of the audio signal received by the opposite end of the call.
  • the first microphone 110 may be arranged on the in-ear portion of the earphone, and the second microphone 120 may be arranged on the ear handle of the earphone, as shown in FIG. 4 .
  • the ENC noise reduction can resist stronger wind noise interference .
  • the first microphone 110 may be a FB microphone in the related art.
  • the FF microphone of the hybrid ANC is used to collect ambient noise outside the ear canal, and the FF microphone is very close to the Voice microphone, and the sound fields of the two are similar. Therefore, in this embodiment of the present application, the Voice microphone (ie The second microphone 120) replaces the FF microphone to collect ambient noise for ANC noise reduction.
  • the position of the second microphone 120 may be different from that of the Voice microphone in the related art, but may be located in the middle of the FF microphone and the Voice microphone in the related art. Therefore, optionally, the second microphone 120
  • the microphone 120 can be arranged in the middle of the ear stem. By arranging the second microphone 120 in the middle of the ear stem, both ENC and ANC effects can be taken into account.
  • the second microphone 120 can also be arranged at a position where the rear end of the earphone is as close to the wearer's mouth as possible, and can take both ANC and ENC effects into consideration.
  • two microphones namely the first microphone 110 and the second microphone 120, can take into account the effects of ANC and ENC at the same time, reduce the corresponding cost and power consumption of the headset, and improve the noise reduction and anti-wind noise capability of calls.
  • the first microphone 110 transmits the collected first audio signal to the first multiplexing module 210, and the first multiplexing module 210 generates two identical signals from the first audio signal, and transmits one of the signals to the ANC
  • the module 320 transmits all the way to the ENC module 310, and the ENC module 310 analyzes and processes the collected sound, retains the model conforming to the human voice, and realizes noise reduction in the uplink of the call.
  • the ANC module 320 generates and outputs a noise inversion signal based on the input first audio signal and the second audio signal, thereby implementing active noise reduction. Therefore, with the earphone provided by the embodiment of the present application, environmental noise reduction and active noise reduction can be achieved through two microphones, thereby reducing the cost and process complexity of the earphone.
  • Embodiments of the present application further provide a noise reduction method, which can be applied to the earphones described in the foregoing embodiments.
  • FIG. 5 is a flowchart of a noise reduction method provided by an embodiment of the present application. As shown in FIG. 5 , the noise reduction method mainly includes the following steps.
  • S510 when performing active noise reduction, perform analysis and processing according to the first audio signal collected by the first microphone of the earphone and the second audio signal collected by the second microphone of the earphone, and filter out the first audio signal and the second audio signal. Noise other than human voice in the second audio signal to output a third audio signal conforming to the human voice model.
  • step S510 may be performed by the ENC module 310 shown in FIG. 1 to FIG. 3 , and the specific implementation can refer to the description in the foregoing headset embodiment, which will not be repeated here.
  • step S520 may be performed by the ANC module 320 shown in FIG. 1 to FIG. 3 , and the specific implementation can refer to the description in the foregoing headset embodiment, which will not be repeated here.
  • environmental noise reduction and active noise reduction can be performed according to the first audio signal and the second audio signal collected by the first microphone and the second microphone. Therefore, with the solution provided by the embodiment of the present application, only two microphones are required to be set in the earphone to realize environmental noise reduction and active noise reduction, thereby reducing the cost and process complexity of the earphone.
  • the method may further include: after performing digital-to-analog conversion on the noise inversion signal, transmitting the converted noise inversion signal to the speaker of the earphone. sound module playback.
  • the noise inversion signal can be simultaneously played to cancel out the noise in the played audio, thereby realizing active noise reduction.
  • the method may further include the following steps 1 and 2.
  • Step 1 receiving a fourth audio signal transmitted externally.
  • the headset receives an audio signal sent by the connected terminal (which may be music being played, or the voice of the opposite terminal during a call).
  • the connected terminal which may be music being played, or the voice of the opposite terminal during a call.
  • the fourth audio signal After receiving the fourth audio signal, the fourth audio signal can also be converted from digital to analog, and then the converted audio signal is transmitted to the speaker module for playback.
  • Step 2 using the fourth audio signal as an echo reference signal, and performing echo cancellation on the first audio signal and the second audio signal.
  • echoes in the first audio signal and the second audio signal may also be eliminated according to the fourth audio signal , so that the noise in the output third audio signal is smaller.
  • the method may further include: performing digital-to-analog conversion on the third audio signal, and transmitting the converted noise inversion signal to the speaker module of the earphone for playback.
  • the third audio signal after noise reduction processing is transmitted to the speaker module for playback, so that the user can hear a clearer sound input by the user.
  • an embodiment of the present application further provides an electronic device.
  • the electronic device may include a processor 610 , a memory 609 , and a program stored in the memory 609 and executable on the processor 610 or an instruction, when the program or instruction is executed by the processor 610, each process of the above-mentioned noise reduction method embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • the embodiments of the present application further provide a readable storage medium, where a program or an instruction is stored on the readable storage medium.
  • a program or an instruction is stored on the readable storage medium.
  • the processor is the processor in the electronic device described in the foregoing embodiments.
  • the readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
  • An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement the noise reduction method embodiments described above.
  • the chip includes a processor and a communication interface
  • the communication interface is coupled to the processor
  • the processor is configured to run a program or an instruction to implement the noise reduction method embodiments described above.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip, or the like.

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Abstract

本申请公开了一种耳机及降噪方法，其中，该耳机包括第一麦克风、第二麦克风、ENC模块、ANC模块、第一复用模块以及第二复用模块；第一复用模块用于将第一麦克风采集到的第一音频信号分别输入ENC模块和ANC模块；第二复用模块用于将第二麦克风采集到的第二音频信号分别输入ENC模块和ANC模块；ENC模块，用于对第一音频信号和第二音频信号进行分析处理，滤除第一音频信号和第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号；ANC模块，用于基于输入的第一音频信号和所述第二音频信号，产生并输出噪声反相信号。

Description

耳机及降噪方法
交叉引用
本发明要求在2020年11月18日提交中国专利局、申请号为202011299885.1、发明名称为“耳机及降噪方法”的中国专利申请的优先权，该申请的全部内容通过引用结合在本发明中。
技术领域
本申请涉及耳机技术领域，具体涉及一种耳机及降噪方法。
背景技术
环境噪声控制(Environment Noise Control，ENC)是指在通话上行端利用单个或多个麦克风采集的数据，经过算法处理后将环境噪声消减、将佩戴者人声保留传输给远端的通话降噪技术，以使得通话时让对方听的更清楚。在相关技术中，为了使真无线立体声(True Wireless Stereo，TWS)耳机获得比较好的ENC性能，至少需要两路音频信号，因此，需要在TWS耳机上设置至少两个麦克风(MIC)。例如，声音(Voice)MIC和前馈式(FeedForward，FF)降噪MIC。
但由于Voice MIC和FF MIC在使用时都暴露在外部，受风噪影响较大，为了提高TWS耳机的抗风噪效果，可以在TWS耳机上使用主动噪声控制(Active Noise Control，ANC)技术，即利用麦克风采集环境噪音，通过耳机喇叭发出与噪声相位相反，频率、振幅相同的Anti-Noise声波与噪声干涉实现相位抵消的降噪技术，以减少佩戴者受外界噪音影响。为了更好的ANC效果，在相关技术中采用混合(Hybrid)降噪，即前馈式降噪和后反馈式 (Feedback，FB)降噪共同作用，因此，至少需要在TWS耳机上设置FF MIC和FB MIC两个麦克风。
由此可见，在相关技术中，为了使用ENC和ANC两种功能，至少需要在TWS耳机上设置三个麦克风，导致TWS耳机的成本及功耗较高。
发明内容
本申请实施例的目的是提供一种耳机及降噪方法，能够降低耳机相应的成本和功耗。
为了解决上述技术问题，本申请采用下述技术方案。
第一方面，本申请实施例公开了一种耳机，包括：第一麦克风、第二麦克风、环境噪声控制ENC模块、主动噪声控制ANC模块、第一复用模块以及第二复用模块；所述第一复用模块与所述第一麦克风连接，所述第一复用模块分别与所述ENC模块和所述ANC模块连接；所述第二复用模块与所述第二麦克风连接，所述第二复用模块分别与所述ENC模块和所述ANC模块连接；其中，所述第一复用模块用于将所述第一麦克风采集到的第一音频信号分别输入所述ENC模块和所述ANC模块；所述第二复用模块用于将所述第二麦克风采集到的第二音频信号分别输入所述ENC模块和所述ANC模块；所述ENC模块，用于对所述第一音频信号和所述第二音频信号进行分析处理，滤除所述第一音频信号和所述第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号；所述ANC模块，用于基于输入的所述第一音频信号和所述第二音频信号，产生并输出噪声反相信号。
第二方面，本申请实施例公开了一种降噪方法，所述方法包括：在执行主动降噪时，根据所述耳机的第一麦克风采集到的第一音频信号以及所述耳机的第二麦克风采集到的第二音频信号进行分析处理，滤除所述第一音频信号和所述第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号；在执行环境降噪时，基于所述第一音频信号和所述第二音频信号，产 生噪声反相信号。
第三方面，本申请实施例提供了一种电子设备，该电子设备包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第二方面所述的方法的步骤。
第四方面，本申请实施例提供了一种计算机可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第二方面所述的方法的步骤。
第五方面，本申请实施例提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第二方面所述的方法。
本申请采用的技术方案能够达到以下有益效果：
本申请实施例公开了一种耳机，该耳机只需要设置两个麦克风，由第一复用模块和第二复用模块分别将两个麦克风采集到的音频信号复制为两路相同的电信号，分别输入ENC模块和ANC模块进行相关算法处理。从而可以通过两个麦克风同时实现ENC功效与ANC功效，降低了耳机相应的成本和功耗。
附图说明
图1是本申请实施例公开的耳机的一种结构示意图；
图2是本申请实施例公开的耳机的另一种结构示意图；
图3是本申请实施例公开的耳机的又一种结构示意图；
图4是本申请实施例公开的耳机的一种外形示意图；
图5是本申请实施例公开的降噪方法的一种流程图；
图6是本申请实施例公开的一种电子设备的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”，一般表示前后关联对象是一种“或”的关系。
下面结合附图，通过具体的实施例及其应用场景对本申请实施例提供的一种耳机详细地说明。
图1示出本申请实施例公开的耳机的一种结构示意图，如图1所示，该耳机主要包括第一麦克风110、第二麦克风120、ENC模块310、ANC模块320、第一复用模块210以及第二复用模块220。第一复用模块210一端与第一麦克风110连接，另一端分别与ENC模块310和ANC模块320连接；第二复用模块220一段与第二麦克风120连接，另一端分别与ENC模块310和ANC模块320连接。
其中，本申请实施例中的耳机只需要两个麦克风，因此，该耳机可以称之为双麦克风。
在本申请实施例中，第一麦克风110用于采集第一音频信号，将第一音频信号输入到第一复用模块210。第一复用模块210与第一麦克风110连接，用于将第一麦克风110采集到的第一音频信号分别输入ENC模块310和ANC模块320。例如，第一复用模块210可以将接收到的第一音频信号生成两路 相同的信号，即两路第一音频信号，一路输入ENC模块310，一路输入ANC模块320。第二麦克风120用于采集第二音频信号，将采集的第二音频信号输入到第二复用模块220。第二复用模块220与第二麦克风120连接，用于将所述第二麦克风120采集到的第二音频信号分别输入ENC模块310和ANC模块320。例如，第二复用模块220可以将接收到的第二音频信号生成两路相同的信号，即两路第二音频信号，一路输入ENC模块310，一路输入ANC模块320。
ENC模块310用于对接收到的第一音频信号和第二音频信号进行分析处理，滤除第一音频信号和第二音频信号中人声以外的噪音，输出符合人声模型的第三音频信号，实现通话上行降噪。ANC模块320用于基于输入的第一音频信号和第二音频信号产生并输出噪声反相信号。
在具体应用中，ENC模块310、ANC模块320、第一复用模块210以及第二复用模块220可以通过数字信号处理(Digital Signal Processing，简称DSP)芯片实现，当然，并不限于此，在具体应用中，也可以采用DSP芯片以外的方式实现，具体本申请实施例中不作限定。
在本申请实施例中，通过第一麦克风110和第二麦克风120两个麦克风可以既可实现双麦耳机的ENC通话降噪，又可实现混合ANC的功效，从而可以降低耳机成本和功耗。
在本申请实施例中，第一复用模块210和第二复用模块220可以为多路复用器(multiplexer，MUX)，多路复用器用于对输入的信号进行复制，输出两路相同的电信号。
在一种可能的实现方式中，如图2所示，该耳机还可以包括编解码模块500和扬声模块600，编解码模块500与ANC模块320连接，扬声模块600与编解码模块500连接，编解码模块500用于将ANC模块320产生并输出的噪声反相信号进行数模转换，将转换后的噪声反相信号传输至扬声模块600播放。通过该可能的实现方式，将噪声反相信号输出至扬声模块600播 放，从而使得扬声模块600可以播放与噪声反相的信号，进而抵消扬声模块600播放的音频信号中的噪声。
在实际应用中，扬声模块600可以为诸如扬声器之类的播放装置。
上述可能的实现方式中，可选的，如图3所示，该耳机还可以包括无线传输模块410，无线传输模块410与编解码模块500和ENC模块310连接，用于接收外部传输的第四音频信号，并将第四音频信号传输至编解码模块500，以及将所述第四音频信号传输至ENC模块310；ENC模块310还可以用于将接收到的第四音频信号作为回声参考信号，对第一音频信号和第二音频信号进行回声消除。在该可能的实现方式中，所述编解码模块500还可以用于将所述第四音频信号进行数模块转换后传输至所述扬声模块600播放。也就是说，在该可选的实现方式中，在滤除第一音频信号和第二音频信号中人声以外的噪音时，还可以根据第四音频信号对第一音频信号和第二音频信号中的回声进行消除，以使得输出的第三音频信号中的噪声更小。
其中，可选的，无线传输模块410可以为蓝牙模块，当然，并不限于此，在实际应用中，无线传输模块410还可以为其它近距离无线传输模块，具体本申请实施例中不作限定。
其中，第四音频信号可以为与耳机连接的终端通过传输模块410传输给耳机的音频信号，例如，第四音频信号可以是终端通过音频播放应用程序播放的音乐，或者通话对端传输到终端的音频信号等，具体本申请实施例不作限定。
在一个可能的实现方式中，ENC模块310还可以用于将第三音频信号输出至编解码模块500，编解码模块500对第三音频信号进行数模转换，将转换后的第三音频信号输出至所述扬声模块600播放。通过该可能的实现方式中，将经过ENC模块310进行降噪处理后的第三音频信号传输至扬声模块600播放，从而使得用户可以听到更清晰的、用户自己输入的声音。
在本申请实施例的一个可能的实现方式中，无线传输模块410还用于接 收ENC模块310输出的第三音频信号，并将第三音频信号传输至外部设备。例如，第三音频信号可以是在通话过程中，用户输入的经ENC模块310降噪后的语音信号，无线传输模块410将第三音频信号传输到外部设备，例如通话终端，由通话终端将第三音频信号发送给通话对端，可以提高通话对端接收到的音频信号的清晰度。
在一种可能的实现方案中，第一麦克风110可以设置在耳机的入耳部，第二麦克风120可以设置在耳机的耳柄，如图4所示。在该可能的实现方式中，由于耳机在佩戴时第一麦克风110在耳道内，受风噪干扰小，因此，采用该可能的实现方案，可以使得通过ENC降噪能抵抗更强的风噪干扰。
其中，第一麦克风110可以为相关技术中的FB麦克风。
在相关技术中，混合ANC的FF麦克风用于采集耳道外的环境噪音，而FF麦克风与Voice麦克风距离很近，两者所处声场相似，因此，在本申请实施例中，利用Voice麦克风(即第二麦克风120)代替FF麦克风采集环境噪音进行ANC降噪。
在上述可能的实现方式中，第二麦克风120可以与相关技术中的Voice麦克风的位置不相同，而是可以位于相关技术中的FF麦克风和Voice麦克风的中间位置，因此，可选的，第二麦克风120可以设置在耳柄的中间位置。通过将第二麦克风120设置在耳柄的中间位置，可以兼顾ENC和ANC效果。
可选的，第二麦克风120也可以设置在耳机后端部离佩戴者嘴尽量近的位置，且能够兼顾ANC与ENC效果。该可能的方案中，通过两个麦克风，即第一麦克风110与第二麦克风120能够同时兼顾ANC与ENC效果，降低耳机相应的成本和功耗，并提高通话降噪抗风噪能力。
在本申请实施例中，第一麦克风110将采集到的第一音频信号传输至第一复用模块210，第一复用模块210将第一音频信号生成两路相同的信号，一路传输至ANC模块320，一路传输至ENC模块310，ENC模块310将采集到的声音进行分析处理，保留符合人声的模型，实现通话上行降噪。ANC 模块320基于输入的第一音频信号和第二音频信号产生并输出噪声反相信号，从而实现主动降噪。因此，采用本申请实施例提供的耳机，通过两个麦克风即可以实现环境降噪和主动降噪，从而可以降低耳机的成本和工艺复杂度。
本申请实施例还提供了一种降噪方法，该方法可以应用于上述实施例中所述的耳机。
图5为本申请实施例提供的降噪方法的一种流程图，如图5所示，该降噪方法主要包括以下步骤。
S510，在执行主动降噪时，根据耳机的第一麦克风采集到的第一音频信号以及耳机的第二麦克风采集到的第二音频信号进行分析处理，滤除所述第一音频信号和所述第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号。
在具体应用中，步骤S510可以由上述图1至图3中所示的ENC模块310执行，具体实现方式可以参见上述耳机实施例中的描述，在此不再赘述。
S520，在执行环境降噪时，基于所述第一音频信号和所述第二音频信号，产生噪声反相信号。
在具体应用中，步骤S520可以由上述图1至图3中所示的ANC模块320执行，具体实现方式可以参见上述耳机实施例中的描述，在此不再赘述。
通过本申请实施例提供的上述降噪方法，可以根据第一麦克风和第二麦克风采集的第一音频信号和第二音频信号进行环境降噪和主动降噪。因此，采用本申请实施例提供的方案，通过耳机只需要设置两个麦克风即可以实现环境降噪和主动降噪，从而可以降低耳机的成本和工艺复杂度。
在一个可能的实现方式中，在产生噪声反相信号之后，该方法还可以包括：将所述噪声反相信号进行数模转换后，将转换后的噪声反相信号传输至所述耳机的扬声模块播放。通过该可能的实现方式，可以在扬声模块播放音频时，通过同时播放噪声反相信号，抵消播放的音频中的噪声，实现主动降噪。
在一个可能的实现方式中，该方法还可以包括以下步骤1和步骤2。
步骤1，接收外部传输的第四音频信号。
例如，耳机接收连接的终端发送的音频信号(可能是播放的音乐，也可以是通话过程中对端的语音)。
在接收到第四音频信号后，还可以将第四音频信号进行数模转换，然后将转换后的音频信号传输至扬声模块播放。
步骤2，将所述第四音频信号作为回声参考信号，对所述第一音频信号和所述第二音频信号进行回声消除。
在上述可能的实现方式中，在滤除第一音频信号和第二音频信号中人声以外的噪音时，还可以根据第四音频信号对第一音频信号和第二音频信号中的回声进行消除，以使得输出的第三音频信号中的噪声更小。
在一个可能的实现方式中，该方法还可以包括：将所述第三音频信号进行数模转换，将转换后的噪声反相信号传输至所述耳机的扬声模块播放。通过该可能的实现方式中，将经过降噪处理后的第三音频信号传输至扬声模块播放，从而使得用户可以听到更清晰的、用户自己输入的声音。
可选的，本申请实施例还提供一种电子设备，如图6所示，该电子设备可以包括处理器610，存储器609，存储在存储器609上并可在所述处理器610上运行的程序或指令，该程序或指令被处理器610执行时实现上述降噪方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述降噪方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的电子设备中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁 碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述降噪方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片、系统芯片、芯片系统或片上系统芯片等。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (16)

  1. 一种耳机，包括：第一麦克风、第二麦克风、环境噪声控制ENC模块、主动噪声控制ANC模块、第一复用模块以及第二复用模块；
    所述第一复用模块与所述第一麦克风连接，所述第一复用模块分别与所述ENC模块和所述ANC模块连接；所述第二复用模块与所述第二麦克风连接，所述第二复用模块分别与所述ENC模块和所述ANC模块连接；其中，
    所述第一复用模块用于将所述第一麦克风采集到的第一音频信号分别输入所述ENC模块和所述ANC模块；
    所述第二复用模块用于将所述第二麦克风采集到的第二音频信号分别输入所述ENC模块和所述ANC模块；
    所述ENC模块，用于对所述第一音频信号和所述第二音频信号进行分析处理，滤除所述第一音频信号和所述第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号；
    所述ANC模块，用于基于输入的所述第一音频信号和所述第二音频信号，产生并输出噪声反相信号。
  2. 根据权利要求1所述的耳机，其中，还包括：编解码模块和扬声模块，其中，
    所述编解码模块与所述ANC模块连接，所述扬声模块与所述编解码模块连接至所述编解码模块；
    所述编解码模块，用于对所述噪声反相信号进行数模转换，将转换后的噪声反相信号传输至所述扬声模块播放。
  3. 根据权利要求2所述的耳机，其中，还包括：无线传输模块，其中，
    所述无线传输模块与所述编解码模块和所述ENC连接，用于接收外部传输的第四音频信号，并将所述第四音频信号传输至所述编解码模块，以及将所述第四音频信号传输至所述ENC模块；
    所述ENC模块，还用于将所述第四音频信号作为回声参考信号，对所述第一音频信号和所述第二音频信号进行回声消除。
  4. 根据权利要求2所述的耳机，其中，
    所述ENC模块，还用于将所述第三音频信号输出至所述编解码模块；
    所述编解码模块，还用于对所述第三音频信号进行数模转换，将转换后的第三音频信号输出至所述扬声模块播放。
  5. 根据权利要求1至4任一项所述的耳机，其中，所述第一麦克风设置在所述耳机的入耳部，所述第二麦克风设置在所述耳机的耳柄。
  6. 根据权利要求5所述的耳机，其中，所述第二麦克风设置在所述耳柄的中间位置。
  7. 根据权利要求5所述的耳机，其中，所述第一麦克风110靠近所述耳机的扬声模块。
  8. 一种降噪方法，应用于权利要求1至7任一项所述的耳机，所述方法包括：
    在执行环境降噪时，根据所述耳机的第一麦克风采集到的第一音频信号以及所述耳机的第二麦克风采集到的第二音频信号进行分析处理，滤除所述第一音频信号和所述第二音频信号中人声以外的噪音，以输出符合人声模型的第三音频信号；
    在执行主动降噪时，基于所述第一音频信号和所述第二音频信号，产生噪声反相信号。
  9. 根据权利要求8所述的方法，其中，在产生噪声反相信号之后，所述方法还包括：
    将所述噪声反相信号进行数模转换后，将转换后的噪声反相信号传输至所述耳机的扬声模块播放。
  10. 根据权利要求9所述的方法，其中，所述方法还包括：
    接收外部传输的第四音频信号；
    将所述第四音频信号作为回声参考信号，对所述第一音频信号和所述第二音频信号进行回声消除。
  11. 根据权利要求8至10任一项所述的方法，其中，所述方法还包括： 将所述第三音频信号进行数模转换，将转换后的噪声反相信号传输至所述耳机的扬声模块播放。
  12. 一种电子设备，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求8至11任一项所述的降噪方法的步骤。
  13. 一种可读存储介质，其中，所述可读存储介质上存储程序或指令，所述程序或指令被所述处理器执行时实现如权利要求8至11任一项所述的降噪方法的步骤。
  14. 一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行终端程序或指令，所述程序或指令被所述处理器执行时实现如权利要求8至11任一项所述的降噪方法的步骤。
  15. 一种计算机程序产品，该计算机程序产品存储于非瞬态的存储介质，所述计算机程序产品被所述处理器执行时实现如权利要求8至11任一项所述的降噪方法的步骤。
  16. 一种电子设备，包括处理器，所述电子设备被配置成用于执行如权利要求8至11任一项所述的降噪方法的步骤。
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