WO2021017136A1 - 一种耳机降噪方法、装置、耳机及可读存储介质 - Google Patents

一种耳机降噪方法、装置、耳机及可读存储介质 Download PDF

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WO2021017136A1
WO2021017136A1 PCT/CN2019/108289 CN2019108289W WO2021017136A1 WO 2021017136 A1 WO2021017136 A1 WO 2021017136A1 CN 2019108289 W CN2019108289 W CN 2019108289W WO 2021017136 A1 WO2021017136 A1 WO 2021017136A1
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signal
electrical signal
microphone
speaker
noise
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PCT/CN2019/108289
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English (en)
French (fr)
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于锴
华洋
王若蕙
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歌尔股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041Mechanical or electronic switches, or control elements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00Microphones
    • H04R2410/03Reduction of intrinsic noise in microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00Details of connection covered by H04R, not provided for in its groups
    • H04R2420/03Connection circuits to selectively connect loudspeakers or headphones to amplifiers

Definitions

  • the embodiments of the present invention relate to the technical field of earphone devices, and in particular, to a method, device, earphone, and computer-readable storage medium for reducing earphone noise.
  • the feedforward microphone (FFMIC) is set in the earphone shell to receive external environmental noise and send it to the speaker through the noise reduction circuit H, so that the speaker SPK sends out a sound signal that is equal in phase with the noise signal and cancels it with the original noise signal. Please refer to Figure 1 and Figure 2 for details.
  • P in Figure 2 is the transfer function of the acoustic channel from the feedforward microphone to the human ear
  • G is the transfer function of the acoustic channel from the speaker to the human ear
  • H is the response of the noise reduction filter
  • d is the noise penetrating the human ear
  • C is the control signal
  • e is the residual noise after d and c are superimposed.
  • the feedforward microphone is required to be strictly sealed, and the rear cavity of the speaker is separated from the feedforward microphone as much as possible, thereby reducing the generation of feedback paths.
  • This solution is easier in earmuffs and other products
  • earphone products such as earplugs
  • due to the small space it is very difficult to dispense and seal the feedforward microphone. If the dispense is not in place, small gaps are likely to occur, and the low frequency sealing is poor, and it is easy to form in the low frequency range.
  • the feedback loop and there is not enough space to design a separate cavity for the speaker to isolate it from the feedforward microphone.
  • the purpose of the embodiments of the present invention is to provide an earphone noise reduction method, device, earphone, and computer-readable storage medium, which can destroy the feedback loop in feedforward noise reduction during use, and can especially improve the noise reduction effect of in-ear earphones And sound quality effects.
  • an embodiment of the present invention provides a method for noise reduction of headphones, including:
  • the first microphone electrical signal according to the sound signal picked up by the feedforward microphone, where the sound signal includes a noise signal and a speaker sound signal;
  • the speaker is controlled to emit a corresponding noise suppression sound signal to cancel the noise signal.
  • the process of performing filtering processing on the first microphone electrical signal according to the speaker front-end electrical signal to obtain the second microphone electrical signal from which the speaker sound signal is filtered is:
  • an adaptive filter to analyze the electrical signal of the horn front end, and determine a target reference signal corresponding to the minimum error signal of the adaptive filter
  • the target reference signal is filtered from the first microphone electric signal to obtain a second microphone electric signal that filters the speaker sound signal.
  • the front-end electrical signal of the speaker includes a noise suppression electrical signal and an audio playback electrical signal.
  • the process of controlling the speaker to emit a corresponding noise suppression sound signal according to the second microphone electrical signal is:
  • the new noise suppression electrical signal is used to update the noise suppression electrical signal in the horn front end electrical signal.
  • the audio playback electrical signal includes an audio electrical signal corresponding to an audio file and/or a voice electrical signal corresponding to a voice call.
  • the embodiment of the present invention also correspondingly provides a noise reduction device for earphones, including:
  • An acquisition module configured to obtain a first microphone electrical signal according to a sound signal picked up by the feedforward microphone, the sound signal including a noise signal and a speaker sound signal;
  • a processing module configured to filter the first microphone electrical signal according to the front-end electrical signal of the speaker to obtain a second microphone electrical signal from which the speaker sound signal is filtered;
  • the noise reduction module is used for controlling the speaker to emit a corresponding noise suppression sound signal according to the second microphone electrical signal, so as to cancel the noise signal.
  • the processing module includes:
  • the analysis module is configured to analyze the electric signal of the horn front end by using an adaptive filter, and determine the target reference signal corresponding to the minimum error signal of the adaptive filter;
  • the filtering module is configured to filter the target reference signal from the first microphone electrical signal to obtain a second microphone electrical signal that filters the speaker sound signal.
  • the embodiment of the present invention also provides a headset, including a feedforward microphone, a speaker, a memory, and a filter processor, wherein:
  • the memory is used to store computer programs
  • the filter processor is used to implement the steps of the earphone noise reduction method described above when the computer program is executed.
  • the filter processor includes an adaptive filter.
  • the embodiment of the present invention also provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the earphone noise reduction method described above are implemented.
  • the embodiment of the present invention provides a method and device for noise reduction of a headset, a headset, and a computer-readable storage medium.
  • the method performs filtering processing on the first microphone electrical signal obtained by the feedforward microphone according to the electrical signal of the speaker front end, and the first microphone is electrically
  • the electrical signal corresponding to the speaker sound signal is filtered out to obtain the second microphone electrical signal that retains the noise signal, and the speaker is controlled to play the corresponding noise suppression sound signal according to the second microphone electrical signal.
  • This application can be used during use Destroying the feedback loop in the feedforward noise reduction can especially improve the noise reduction effect and sound quality of in-ear headphones.
  • Figure 1 is a schematic diagram of an existing feedforward noise reduction
  • Figure 2 is a schematic diagram of an existing feedforward noise reduction principle
  • Fig. 3 is a structure diagram of an existing feedforward noise reduction with a feedback path
  • FIG. 4 is a schematic flowchart of a method for noise reduction of earphones according to an embodiment of the present invention
  • FIG. 5 is a structural diagram of feedforward noise reduction provided with an adaptive filter according to an embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of an earphone noise reduction device provided by an embodiment of the present invention.
  • the embodiments of the present invention provide an earphone noise reduction method, device, earphone and computer-readable storage medium, which can destroy the feedback loop in feedforward noise reduction during use, and can especially improve the noise reduction effect and sound quality of in-ear earphones effect.
  • FIG. 4 is a schematic flowchart of a method for noise reduction of earphones according to an embodiment of the present invention.
  • the method includes:
  • S110 Obtain the first microphone electrical signal according to the sound signal picked up by the feedforward microphone, where the sound signal includes a noise signal and a speaker sound signal;
  • the feed-forward microphone dispensing will not be in place, resulting in not strict sealing of the feed-forward microphone, and the feed-forward microphone and the speaker cannot be isolated.
  • the sound signal picked up by the feedforward microphone during the use of the headset consists of two parts, one part is the noise signal in the environment, and the other part is the sound signal played by the speaker and fed back to the speaker sound signal in the feedforward microphone. According to the sound signal picked up by the feedforward microphone, the corresponding first microphone electrical signal can be further obtained.
  • S120 Filtering the first microphone electrical signal according to the front-end electrical signal of the speaker to obtain a second microphone electrical signal that filters out the speaker sound signal;
  • the speaker sends out the corresponding sound signal according to the electrical signal of the front end of the speaker
  • the first microphone signal can be filtered according to the electrical signal of the front end of the speaker, and the first microphone signal The speaker sound signal is partially filtered out, thereby obtaining the remaining part of the second microphone electrical signal.
  • S130 Control the speaker to emit a corresponding noise suppression sound signal according to the electrical signal of the second microphone to cancel the noise signal.
  • the speaker is controlled according to the second microphone electrical signal to emit a corresponding noise suppression sound signal, so that the noise suppression sound signal is used to cancel the noise signal, wherein, Since the second microphone electrical signal in the present application filters out the speaker sound signal that is fed back to the feedforward microphone, controlling the noise suppression sound signal emitted by the speaker according to the second microphone electrical signal can avoid system whistling and resonance to a certain extent.
  • the occurrence of instability such as the occurrence of instability, destroys the feedback loop, thereby improving the noise reduction effect, especially for small-sized earphones, when the feedforward microphone and the speaker cannot be isolated, the noise reduction effect of the earphone can be improved, and the earphone It can also improve sound quality when playing music.
  • the process of filtering the electrical signal of the first microphone according to the electrical signal of the front end of the speaker in S120 to obtain the electrical signal of the second microphone from which the sound signal of the speaker is filtered may be specifically:
  • the target reference signal is filtered out from the first microphone electric signal to obtain the second microphone electric signal which filters the speaker sound signal.
  • an adaptive filter can be used in this application to adjust the horn front-end electrical signal Perform analysis.
  • the electrical signal of the first microphone is n+s, where n represents the electrical signal corresponding to the noise signal, s represents the electrical signal corresponding to the speaker sound signal received by the front-end microphone, and x is the output to
  • the signal of the horn that is, the electrical signal of the front end of the horn
  • y is the output electrical signal of the adaptive filter, where the electrical signal x of the front end of the horn can be used as the initial reference signal, and then the initial reference signal is analyzed.
  • the output signal y at this time is determined, and the output signal y is used as the target reference signal. That is, the output signal corresponding to the minimum error signal of the adaptive filter is used as the target reference signal.
  • the output signal y of the adaptive filter is closest to the speaker sound signal s in the first microphone signal, so it can At this time, the output signal y of the adaptive filter is used as the target reference signal (that is, as the speaker sound signal of the incoming feedforward microphone), and the target reference signal is filtered from the electrical signal of the first microphone, so as to obtain the filtering
  • the second microphone electrical signal of the horn sound signal so that the remaining electrical signal part in the second microphone electrical signal is closer to the electrical signal corresponding to the noise signal, further reducing the occurrence of instability such as system whistling and resonance, and improving the reduction Noise effect and headphone sound quality.
  • the front-end electrical signal of the speaker can include two parts, one is the noise suppression electrical signal, and the other is the audio playback electrical signal, so that the speaker emits noise suppression based on the noise suppression electrical signal
  • the sound signal is used to cancel the noise signal, and the speaker sends out a corresponding sound signal according to the audio playback electrical signal.
  • the sound signal can be music or voice. That is, the audio playback signal in this embodiment may include the audio electrical signal corresponding to the audio file and/or the voice electrical signal corresponding to the voice call, which can be specifically determined according to the actual situation, and this embodiment does not make special limitations.
  • the above-mentioned process of controlling the speaker to emit the corresponding noise suppression sound signal according to the second microphone electrical signal may specifically be:
  • the new noise suppression electrical signal is used to update the noise suppression electrical signal in the horn front end electrical signal.
  • a new noise suppression electrical signal can be generated according to the second microphone electrical signal, and the new noise suppression electrical signal can be used
  • the noise suppression electrical signal in the front-end electrical signal of the horn is updated, and then the horn is controlled to emit a corresponding noise suppression sound signal according to the new noise suppression electrical signal to cancel the noise signal.
  • the noise suppression electrical signal in the electrical signal of the front end of the speaker is constantly updated.
  • the audio playback electrical signal needs to be updated accordingly. This part is the prior art. No longer.
  • the embodiment of the present invention provides a noise reduction method for earphones.
  • the method performs filtering processing on the first microphone electric signal obtained by the feedforward microphone according to the electric signal of the front end of the speaker, and the electric signal corresponding to the sound signal of the speaker in the first microphone electric signal is filtered. Partially filter to obtain the second microphone electrical signal that retains the noise signal, and control the speaker to play the corresponding noise suppression sound signal according to the second microphone electrical signal.
  • This application can destroy the feedback loop in the feedforward noise reduction during use. In particular, it can improve the noise reduction effect and sound quality effect of the earphone.
  • the embodiment of the present invention also correspondingly provides an earphone noise reduction device. Please refer to FIG. 6 for details.
  • the device includes:
  • the obtaining module 21 is configured to obtain the first microphone electrical signal according to the sound signal picked up by the feedforward microphone, and the sound signal includes a noise signal and a speaker sound signal;
  • the processing module 22 is configured to filter the first microphone electrical signal according to the front-end electrical signal of the speaker to obtain the second microphone electrical signal from which the speaker sound signal is filtered;
  • the noise reduction module 23 is used for controlling the speaker to emit a corresponding noise suppression sound signal according to the electrical signal of the second microphone to cancel the noise signal.
  • processing module 22 includes:
  • the analysis module is used to analyze the electrical signal of the horn with the adaptive filter, and determine the target reference signal corresponding to the minimum error signal of the adaptive filter;
  • the filtering module is used to filter the target reference signal from the first microphone electrical signal to obtain the second microphone electrical signal from which the speaker sound signal is filtered.
  • the earphone noise reduction device provided in this embodiment has the same beneficial effects as the earphone noise reduction method provided in the foregoing embodiment, and is specific to the earphone noise reduction method involved in this embodiment.
  • the earphone noise reduction device provided in this embodiment has the same beneficial effects as the earphone noise reduction method provided in the foregoing embodiment, and is specific to the earphone noise reduction method involved in this embodiment.
  • an embodiment of the present invention also provides a headset, including a feedforward microphone, a speaker, a memory, and a filter processor, wherein:
  • Memory used to store computer programs
  • the filter processor is used to implement the steps of the earphone noise reduction method when the computer program is executed.
  • the filter processor includes an adaptive filter, and of course also includes a feedforward filter (that is, a noise reduction filter).
  • the feedforward filter processes the first microphone electrical signal output by the feedforward microphone according to the target reference signal to obtain the second microphone electrical signal, and according to the second microphone The electrical signal controls the horn to send out the corresponding noise suppression sound signal.
  • the embodiment of the present invention also provides a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the steps of the earphone noise reduction method are implemented. .
  • the computer-readable storage medium may include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc., which can store program codes Medium.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)

Abstract

本发明公开了一种耳机降噪方法、装置、耳机及计算机可读存储介质,包括依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,声音信号包括噪声信号和喇叭声音信号;依据喇叭前端电信号对第一麦克风电信号进行滤波处理,得到滤除喇叭声音信号的第二麦克风电信号;依据第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号,以对于噪声信号进行抵消。本发明根据喇叭前端电信号对第一麦克风电信号进行滤波处理,将第一麦克风电信号中与喇叭声音信号对应的电信号部分滤除,得到保留噪声信号的第二麦克风电信号,根据第二麦克风电信号控制喇叭播放相应的噪声抑制声音信号,在使用过程中能破坏前馈降噪中的反馈回路,提高耳机的降噪效果和音质。

Description

一种耳机降噪方法、装置、耳机及可读存储介质
本申请要求于2019年7月26日提交中国专利局、申请号为201910684219.0、发明名称为“一种耳机降噪方法、装置、耳机及可读存储介质”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及耳机设备技术领域,特别是涉及一种耳机降噪方法、装置、耳机及计算机可读存储介质。
背景技术
前馈麦克风(FFMIC)设置在耳机外壳,以接收外部的环境噪声,通过降噪电路H发送给喇叭,使喇叭SPK发出一个与噪声信号等值反相的声音信号,与原噪声信号进行抵消,具体请参照图1和图2。
其中,图2中P为前馈麦克风到人耳处的声学通道传递函数,G为喇叭到人耳处声学通道的传递函数,H为降噪滤波器响应,d为渗透到人耳处的噪声,c为控制信号,e为d与c叠加后的残余噪声。
理论上,前馈降噪中仅存在前馈通路,无反馈通路出现。但是,在实际设计时,由于前馈麦克风密封不严等情况下,会将喇叭发出的声音传递给前馈麦克风,产生反馈通路,如图3虚线所示。反馈回前馈麦克的声音经前馈滤波器又发送给喇叭,在某些频点上可能会产生正向的叠加,引起***啸叫、共振等不稳定现象。另外,由于反馈回路的存在,喇叭播放音乐时也会被反馈回***,对音质产生破坏。
通常为避免上述情况出现,在设计耳机时会要求前馈麦克风严格密封,同时尽量将喇叭后腔与前馈麦克风隔开,从而减少反馈通路的产生,这一方案在耳罩等产品中比较容易实现,但是在耳塞等入耳式耳机产品中,由于空间较小,使前馈麦克风的点胶密封工作非常困难,点胶不到位容易出现细小的缝隙,低频密封较差,极易在低频段形成反馈回路,而且,没有足够的空间给喇叭设计单独腔体,使其与前馈麦克风隔离。
因此,如何提高耳机的降噪效果、保障耳机音质成为本领域技术人员需要解决的问题。
发明内容
本发明实施例的目的是提供一种耳机降噪方法、装置、耳机及计算机可读存储介质,在使用过程中能够破坏前馈降噪中的反馈回路,尤其能够提高入耳式耳机的降噪效果和音质效果。
为解决上述技术问题,本发明实施例提供了一种耳机降噪方法,包括:
依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,所述声音信号包括噪声信号和喇叭声音信号;
依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号;
依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号,以对于所述噪声信号进行抵消。
可选的,所述依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号的过程为:
采用自适应滤波器对所述喇叭前端电信号进行分析,确定出与所述自适应滤波器的最小误差信号对应的目标参考信号;
从所述第一麦克风电信号中滤除所述目标参考信号,得到滤除所述喇叭声音信号的第二麦克风电信号。
可选的,所述喇叭前端电信号包括噪声抑制电信号和音频播放电信号。
可选的,所述依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号的过程为:
依据所述第二麦克风电信号生成新的噪声抑制电信号;
依据所述新的噪声抑制电信号控制所述喇叭发出相应的噪声抑制声音信号;
采用所述新的噪声抑制电信号对所述喇叭前端电信号中的噪声抑制电信号进行更新。
可选的,所述音频播放电信号包括与音频文件对应的音频电信号和/或与语音通话对应的语音电信号。
本发明实施例还相应的提供了一种耳机降噪装置,包括:
获取模块,用于依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,所述声音信号包括噪声信号和喇叭声音信号;
处理模块,用于依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号;
降噪模块,用于依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号,以对于所述噪声信号进行抵消。
可选的,所述处理模块包括:
分析模块,用于采用自适应滤波器对所述喇叭前端电信号进行分析,确定出与所述自适应滤波器的最小误差信号对应的目标参考信号;
滤除模块,用于从所述第一麦克风电信号中滤除所述目标参考信号,得到滤除所述喇叭声音信号的第二麦克风电信号。
本发明实施例还提供了一种耳机,包括前馈麦克风、喇叭、存储器和滤波处理器,其中:
所述存储器,用于存储计算机程序;
所述滤波处理器,用于执行所述计算机程序时实现如上述所述耳机降噪方法的步骤。
可选的,所述滤波处理器包括自适应滤波器。
本发明实施例还提供了一种计算机可读存储介质,所述计算机可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现如上述所述耳机降噪方法的步骤。
本发明实施例提供了一种耳机降噪方法、装置、耳机及计算机可读存储介质,该方法根据喇叭前端电信号对前馈麦克风获取的第一麦克风电信号进行滤波处理,将第一麦克风电信号中与喇叭声音信号对应的电信号部分滤除,得到保留噪声信号的第二麦克风电信号,并根据该第二麦克风电信号控制喇叭播放相应的噪声抑制声音信号,本申请在使用过程中能够破坏前馈降噪中的反馈回路,尤其能够提高入耳式耳机的降噪效果和音质效果。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对现有技术和实 施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为现有的一种前馈降噪示意图;
图2为现有的一种前馈降噪原理图;
图3为现有的一种存在反馈通路的前馈降噪结构图;
图4为本发明实施例提供的一种耳机降噪方法的流程示意图;
图5为本发明实施例提供的一种设有自适应滤波器的前馈降噪结构图;
图6为本发明实施例提供的一种耳机降噪装置的结构示意图。
具体实施方式
本发明实施例提供了一种耳机降噪方法、装置、耳机及计算机可读存储介质,在使用过程中能够破坏前馈降噪中的反馈回路,尤其能够提高入耳式耳机的降噪效果和音质效果。
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明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发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
请参照图4,图4为本发明实施例提供的一种耳机降噪方法的流程示意图。该方法包括:
S110:依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,声音信号包括噪声信号和喇叭声音信号;
需要说明的是,由于对于入耳式耳机(例如TWS耳机)内部空间小,前馈麦克风点胶会不到位,导致前馈麦克风密封不严格,并且前馈麦克风和喇叭之间不能够隔离,所以在耳机使用过程中前馈麦克风拾取到的声音信号包括两部分,一部分为环境中的噪声信号,另一部分为喇叭播放的声音信号反馈至前馈麦克风中的喇叭声音信号。根据前馈麦克风拾取到的声音信号能够进一步得到与其对应的第一麦克风电信号。
S120:依据喇叭前端电信号对第一麦克风电信号进行滤波处理,得到滤除喇叭声音信号的第二麦克风电信号;
具体的,由于喇叭是根据喇叭前端电信号发出与其对应的声音信号的,所以在得到第一麦克风信号后,可以根据喇叭前端电信号对第一麦克风信号进行滤波处理,将第一麦克风信号中的喇叭声音信号部分滤除掉,从而得到剩余部分的第二麦克风电信号。
S130:依据第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号,以对于噪声信号进行抵消。
具体的,在得到滤除喇叭声音信号的第二麦克风电信号后,根据该第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号,以便采用该噪声抑制声音信号对噪声信号进行抵消,其中,由于本申请中的第二麦克风电信号中滤除了反馈至前馈麦克风的喇叭声音信号,所以根据该第二麦克风电信号控制喇叭发出的噪声抑制声音信号能够在一定程度上避免***啸叫、共振等不稳定情况的发生,破坏了反馈回路,从而提高降噪效果,尤其是对于小体积的耳机,在不能够对前馈麦克风和喇叭进行隔离时,能够提高耳机的降噪效果,并且在耳机播放音乐时,也能够提高音质。
进一步的,上述S120中依据喇叭前端电信号对第一麦克风电信号进行滤波处理,得到滤除喇叭声音信号的第二麦克风电信号的过程,具体可以为:
采用自适应滤波器对喇叭电信号进行分析,确定出与自适应滤波器的最小误差信号对应的目标参考信号;
从第一麦克风电信号中滤除目标参考信号,得到滤除喇叭声音信号的第二麦克风电信号。
需要说明的是,由于输入至喇叭的喇叭前端电信号与前馈麦克风拾取到的喇叭信号之间存在一定差异,所以为了提高处理精确度,本申请中可以采用自适应滤波器对喇叭前端电信号进行分析。具体的,如图5所示,第一麦克风电信号为n+s,其中n表示与噪声信号对应的电信号,s表示与前端麦克风接收到的喇叭声音信号对应的电信号,x为输出至喇叭的信号,也即喇叭前端电信号,y为自适应滤波器的输出电信号,其中,可以将喇叭前端电信号x作为初始参考信号,然后对该初始参考信号进行分析,当自适应滤波器的误差信号e达到最小时,确定出此时的输出信号y,将该输出信号y作为目 标参考信号。也即将与自适应滤波器的最小误差信号对应的输出信号作为目标参考信号,误差信号e最小时,自适应滤波器的输出信号y与第一麦克风信号中的喇叭声音信号s最接近,所以可以将此时自适应滤波器的输出信号y作为目标参考信号(也即作为传入前馈麦克风的喇叭声音信号),并从第一麦克风电信号中滤除该目标参考信号,从而能够得到滤除喇叭声音信号的第二麦克风电信号,以使该第二麦克风电信号中剩余的电信号部分更接近于噪声信号对应的电信号,进一步减少***啸叫、共振等不稳定情况的发生,提高降噪效果和耳机音质。
更进一步的,当用户使用耳机通话或者播放音乐时,该喇叭前端电信号可以包括两部分,一部分为噪声抑制电信号,另一部分为音频播放电信号,以使喇叭根据噪声抑制电信号发出噪声抑制声音信号,以抵消噪声信号,喇叭根据音频播放电信号发出相应的声音信号,该声音信号可以为音乐或者语音。也即,本实施例中的音频播放信号可以包括与音频文件对应的音频电信号和/或与语音通话对应的语音电信号,具体可以根据实际情况进行确定,本实施例不做特殊限定。
具体的,当喇叭前端电信号包括噪声抑制电信号和音频播放电信号两部分时,上述依据第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号的过程,具体可以为:
依据第二麦克风电信号生成新的噪声抑制电信号;
依据新的噪声抑制电信号控制喇叭发出相应的噪声抑制声音信号;
采用新的噪声抑制电信号对喇叭前端电信号中的噪声抑制电信号进行更新。
需要说明的是,由于第二麦克风电信号中已经滤除了与喇叭声音信号对应的电信号部分,所以可以根据第二麦克风电信号生成新的噪声抑制电信号,并采用该新的噪声抑制电信号对喇叭前端电信号中的噪声抑制电信号进行更新,然后根据该新的噪声抑制电信号控制喇叭发出相应的噪声抑制声音信号,以对噪声信号进行抵消。在后续对喇叭进行控制时,不断更新喇叭前端电信号中的噪声抑制电信号,当然在音频文件发生变化时,也需要相应的更新音频播放电信号,该部分为现有技术,本申请对此不再赘述。
本发明实施例提供了一种耳机降噪方法,该方法根据喇叭前端电信号对 前馈麦克风获取的第一麦克风电信号进行滤波处理,将第一麦克风电信号中与喇叭声音信号对应的电信号部分滤除,得到保留噪声信号的第二麦克风电信号,并根据该第二麦克风电信号控制喇叭播放相应的噪声抑制声音信号,本申请在使用过程中能够破坏前馈降噪中的反馈回路,尤其能够提高入耳式耳机的降噪效果和音质效果。
在上述实施例的基础上,本发明实施例还相应的提供了一种耳机降噪装置,具体请参照图6,该装置包括:
获取模块21,用于依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,声音信号包括噪声信号和喇叭声音信号;
处理模块22,用于依据喇叭前端电信号对第一麦克风电信号进行滤波处理,得到滤除喇叭声音信号的第二麦克风电信号;
降噪模块23,用于依据第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号,以对于噪声信号进行抵消。
进一步的,处理模块22包括:
分析模块,用于采用自适应滤波器对喇叭电信号进行分析,确定出与自适应滤波器的最小误差信号对应的目标参考信号;
滤除模块,用于从第一麦克风电信号中滤除目标参考信号,得到滤除喇叭声音信号的第二麦克风电信号。
需要说明的是,本实施例中所提供的耳机降噪装置具有与上述实施例中所提供的耳机降噪方法相同的有益效果,并且对于本实施例中所涉及到的耳机降噪方法的具体介绍请参照上述实施例,本申请对此不再赘述。
在上述实施例的基础上,本发明实施例还提供了一种耳机,包括前馈麦克风、喇叭、存储器和滤波处理器,其中:
存储器,用于存储计算机程序;
滤波处理器,用于执行计算机程序时实现如上述耳机降噪方法的步骤。
进一步的,滤波处理器包括自适应滤波器,当然还包括前馈滤波器(也即降噪滤波器)。
具体的,在自适应滤波器输出目标参考信号后,前馈滤波器根据该目标 参考信号对前馈麦克风输出的第一麦克风电信号进行处理,得到第二麦克风电信号,并根据该第二麦克风电信号控制喇叭发出相应的噪声抑制声音信号。
在上述实施例的基础上,本发明实施例还提供了一种计算机可读存储介质,计算机可读存储介质上存储有计算机程序,计算机程序被处理器执行时实现如上述耳机降噪方法的步骤。
该计算机可读存储介质可以包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言,由于其与实施例公开的方法相对应,所以描述的比较简单,相关之处参见方法部分说明即可。
还需要说明的是,在本说明书中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其他实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种耳机降噪方法,其特征在于,包括:
    依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,所述声音信号包括噪声信号和喇叭声音信号;
    依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号;
    依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号,以对于所述噪声信号进行抵消。
  2. 根据权利要求1所述的耳机降噪方法,其特征在于,所述依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号的过程为:
    采用自适应滤波器对所述喇叭前端电信号进行分析,确定出与所述自适应滤波器的最小误差信号对应的目标参考信号;
    从所述第一麦克风电信号中滤除所述目标参考信号,得到滤除所述喇叭声音信号的第二麦克风电信号。
  3. 根据权利要求2所述的耳机降噪方法,其特征在于,所述喇叭前端电信号包括噪声抑制电信号和音频播放电信号。
  4. 根据权利要求3所述的耳机降噪方法,其特征在于,所述依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号的过程为:
    依据所述第二麦克风电信号生成新的噪声抑制电信号;
    依据所述新的噪声抑制电信号控制所述喇叭发出相应的噪声抑制声音信号;
    采用所述新的噪声抑制电信号对所述喇叭前端电信号中的噪声抑制电信号进行更新。
  5. 根据权利要求3所述的耳机降噪方法,其特征在于,所述音频播放电信号包括与音频文件对应的音频电信号和/或与语音通话对应的语音电信号。
  6. 一种耳机降噪装置,其特征在于,包括:
    获取模块,用于依据前馈麦克风拾取到的声音信号得到第一麦克风电信号,所述声音信号包括噪声信号和喇叭声音信号;
    处理模块,用于依据喇叭前端电信号对所述第一麦克风电信号进行滤波处理,得到滤除所述喇叭声音信号的第二麦克风电信号;
    降噪模块,用于依据所述第二麦克风电信号控制所述喇叭发出相应的噪声抑制声音信号,以对于所述噪声信号进行抵消。
  7. 根据权利要求6所述的耳机降噪装置,其特征在于,所述处理模块包括:
    分析模块,用于采用自适应滤波器对所述喇叭前端电信号进行分析,确定出与所述自适应滤波器的最小误差信号对应的目标参考信号;
    滤除模块,用于从所述第一麦克风电信号中滤除所述目标参考信号,得到滤除所述喇叭声音信号的第二麦克风电信号。
  8. 一种耳机,其特征在于,包括前馈麦克风、喇叭、存储器和滤波处理器,其中:
    所述存储器,用于存储计算机程序;
    所述滤波处理器,用于执行所述计算机程序时实现如权利要求1至5任意一项所述耳机降噪方法的步骤。
  9. 根据权利要求8所述的耳机,其特征在于,所述滤波处理器包括自适应滤波器。
  10. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现如权利要求1至5任意一项所述耳机降噪方法的步骤。
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