WO2012159380A1 - Device and method for reducing wind noise for mobile terminals - Google Patents

Device and method for reducing wind noise for mobile terminals Download PDF

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Publication number
WO2012159380A1
WO2012159380A1 PCT/CN2011/078591 CN2011078591W WO2012159380A1 WO 2012159380 A1 WO2012159380 A1 WO 2012159380A1 CN 2011078591 W CN2011078591 W CN 2011078591W WO 2012159380 A1 WO2012159380 A1 WO 2012159380A1
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WIPO (PCT)
Prior art keywords
wind noise
noise signal
module
output
signal
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Application number
PCT/CN2011/078591
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French (fr)
Chinese (zh)
Inventor
孙浩
葛建平
张爱同
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中兴通讯股份有限公司
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Publication of WO2012159380A1 publication Critical patent/WO2012159380A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G10K11/17823—Reference signals, e.g. ambient acoustic environment
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17861—Methods, e.g. algorithms; Devices using additional means for damping sound, e.g. using sound absorbing panels
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an apparatus and method for reducing wind noise of a mobile terminal. Background technique
  • the existing ordinary mobile phone has a good call effect in a general use environment, especially in an indoor environment.
  • the wind noise is very obvious, so that not only does it listen to itself.
  • the voice signal transmitted by the other party is unclear, and the wind noise signal is transmitted to the other party's earpiece side through the microphone, so that the other party can't hear the voice signal of the other party, which causes a great obstacle to the communication between the two parties, which seriously affects the effect and quality of the call.
  • the present invention is directed to an apparatus and method for reducing wind noise of a mobile terminal, which solves the problem of poor communication effect brought to the mobile terminal by wind noise in the prior art.
  • the present invention provides a device for reducing wind noise on a mobile terminal, including: a wind noise signal acquisition module, a wind noise signal detection module, and a wind noise signal processing module, wherein
  • the wind noise signal acquisition module is configured to collect an external wind noise signal, and convert the same into an electric signal output to the wind noise signal detection module and the wind noise signal processing module;
  • the wind noise signal detecting module is configured to output a wind noise signal to the wind noise signal collecting module The detection is performed, and the wind noise signal processing module is triggered when it is determined that the wind noise reduction process is required; the wind noise signal processing module is configured to filter and amplify the wind noise signal output by the wind noise signal acquisition module. And the phase conversion process is output to the handset of the mobile terminal.
  • the wind noise signal detecting module is specifically configured to: filter the high frequency interference and amplify the wind noise signal output by the wind noise signal collecting module, and then determine whether the wind noise signal is greater than a predetermined wind noise signal threshold, if The wind noise processing module is triggered, otherwise no noise reduction processing is performed.
  • the wind noise signal processing module specifically includes: a filtering unit and a reverse amplifying unit, where
  • the filtering unit is configured to filter the wind noise signal output by the wind noise signal acquisition module to filter the low frequency interference and output the signal to the reverse amplification unit;
  • the inverse amplifying unit is configured to sequentially perform amplification, amplitude and phase processing on the wind noise signal output by the filtering unit, so that the amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite.
  • the method further includes: a passive wind noise module, the module includes: a single-point microphone, a microphone sleeve, wherein
  • the unidirectional microphone is disposed at a predetermined position of the mobile terminal housing, and the sound emitting hole is directed to the sound hole of the front shell of the mobile terminal;
  • the microphone sleeve is sleeved on the single-pointing microphone, and the opening thereof is physically offset from the sound hole of the single-pointing microphone.
  • the passive wind noise module further comprises: a hole-shaped wind noise material, one side is in close contact with the front end of the mobile terminal, and the other side is tightly pressed with the microphone rubber sleeve.
  • the present invention also provides a method for reducing wind noise on a mobile terminal, including:
  • Step A collecting the wind noise signal of the outside world and converting it into an electrical signal output
  • Step B The wind noise signal outputted in step A is detected, and when it is determined that the wind noise reduction process is required, it is filtered, amplified, and phase-converted and output to the handset of the mobile terminal. Further, the step B specifically includes
  • Step A Determining whether the high-frequency interference and the amplified wind noise signal are greater than a predetermined wind noise signal threshold, and if so, filtering the low-frequency interference on the wind noise signal outputted in step A, and sequentially performing amplification, amplitude, and phase processing, Make the amplitude of the output the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite; otherwise, no noise reduction processing is performed.
  • the voice quality of the earpiece side is improved, so that the voice of the other party can be clearly heard; on the other hand, the voice quality of the other party's earpiece side is improved, so that The other party can clearly hear their own voice, make the communication clearer and smoother, and greatly improve the user's call performance in outdoor, especially windy situations.
  • FIG. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a wind noise signal processing module according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a passive wind noise reduction module according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of a method according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, which may specifically include: a wind noise signal acquisition module 11, a wind noise signal detection module 12, and a wind noise signal processing module.
  • the wind noise signal acquisition module 11 is configured to collect the wind noise signal of the outside world, and convert it into an electric signal output to the wind noise signal detecting module 12 and the wind noise signal processing module 13;
  • the wind noise signal detecting module 12 is configured to detect the wind noise signal output by the wind noise signal collecting module 11 and trigger the wind noise signal processing module 13 when determining that the wind noise reduction processing is required; specifically, the wind noise signal detecting The module 12 filters out the high-frequency interference and amplifies the wind noise signal outputted by the wind noise signal acquisition module 11, and then determines whether it is greater than a predetermined wind noise signal threshold. If yes, the wind noise signal processing module 13 is triggered, otherwise no noise reduction processing is performed. .
  • the wind noise signal processing module 13 is configured to filter, amplify, and phase convert the wind noise signal outputted by the wind noise signal acquisition module 11 to be output to the handset of the mobile terminal, so as to cancel the wind noise signal appearing on the handset side, thereby Achieve the effect of active noise reduction.
  • the wind noise signal processing module 13 mainly includes: a filtering unit 131 and an inverse amplifying unit 132;
  • the filtering unit 131 is configured to process the wind noise signal collected by the wind noise signal collecting module 11 to filter out the mixed low frequency signal (mainly a non-speech signal), so that the signal for reverse and amplification processing is cleaner;
  • the inverse amplifying unit 132 is configured to sequentially perform amplification, amplitude and phase processing on the filtered wind noise signal, so that the amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite, thereby the wind noise Offset, it has the effect of reducing wind noise.
  • the device in the embodiment of the present invention may further include: a passive wind noise reduction module;
  • a passive wind noise reduction module The schematic diagram of the structure of the wind noise module, as shown in FIG. 3, the passive wind noise module may specifically include: a single-point microphone 31, a microphone sleeve 32, and a hole-shaped wind noise material 33;
  • the unidirectional microphone 31 has an audible hole pointing to the sound hole on the front casing 34 of the mobile terminal; the microphone sleeve 32 is physically connected to the unidirectional microphone 31, and is sleeved on the unidirectional microphone 31, and the aperture and the unidirectional microphone 31 are provided.
  • the sound hole is physically staggered, and is tightly pressed against the hole-shaped wind noise material 33, and the noise signal inside the mobile terminal is blocked and transmitted to the microphone; meanwhile, the hole-shaped wind noise material 33 is in close contact with the front cover 34 of the mobile terminal. It can weaken the wind noise signal from the outside into the microphone, and thus suppress the other party's hearing of wind noise.
  • FIG. 4 is a schematic flowchart of a method according to an embodiment of the present invention. As shown in FIG. 4, the following steps may be specifically included:
  • Step 401 collecting an external wind noise signal and converting it into an electrical signal output
  • Step 402 The wind noise signal outputted in step 401 is detected, and when it is determined that the wind noise reduction process is required, it is filtered, amplified, and phase-converted, and then output to the mobile terminal for listening.
  • the step 402 specifically includes:
  • the embodiments of the present invention provide an apparatus and method for reducing wind noise of a mobile terminal.
  • the embodiment of the present invention increases active wind noise and passive wind noise. Processing, on the one hand, improve the voice quality of the handset side, so that you can clearly hear the other party's voice; on the other hand, improve the voice quality of the other party's handset side, so that the other party can clearly hear
  • the voice of the user makes the communication clearer and smoother, which greatly improves the user's call effect in the outdoor, especially in windy situations.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Human Computer Interaction (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Telephone Function (AREA)

Abstract

Disclosed are a device and method for reducing wind noise for a mobile terminal. The device includes: a wind noise signal collection module for collecting an external wind noise signal and converting same into an electrical signal for output to a wind noise signal detection module and to a wind noise signal processing module; the wind noise signal detection module is used for detecting the wind noise signal outputted by the wind noise signal collection module and triggering the wind noise signal processing module when it is determined that wind noise reduction processing is required; the wind noise signal processing module is used for filtering the wind noise signal outputted by the wind noise signal collection module, and performing signal amplification and phase conversion processing before outputting same to the mobile terminal receiver. The present invention improves, on the one hand, the voice quality at the receiver side for one individual, enabling same clearly to hear the voice of the other party and, on the other hand, improves the voice quality at the receiver side for the other party, enabling same clearly to hear the voice of the other individual, thus improving the communication results for users particularly in windy conditions.

Description

用于对移动终端降风噪的装置及方法 技术领域  Device and method for reducing wind noise of mobile terminal
本发明涉及通信技术领域， 尤其涉及一种用于对移动终端降风噪的装 置及方法。 背景技术  The present invention relates to the field of communications technologies, and in particular, to an apparatus and method for reducing wind noise of a mobile terminal. Background technique
随着移动通讯技术的迅猛发展， 移动电话现在已经成为人们日常生活 不可或缺的必需品。  With the rapid development of mobile communication technology, mobile phones have become an indispensable necessity in people's daily lives.
但现有的普通移动电话在一般的使用环境中， 尤其是室内环境中使用 时通话效果良好， 然而在户外使用尤其是在风力较大的野外使用时， 风噪 声非常明显， 这样， 不但自己听不清对方传递过来的语音信号， 而且风噪 信号会通过麦克风传递到对方听筒侧， 使对方听不清自己的语音信号， 对 双方的交流造成非常大的障碍， 严重影响了通话的效果和质量。 发明内容  However, the existing ordinary mobile phone has a good call effect in a general use environment, especially in an indoor environment. However, when used outdoors, especially in a field with a large wind, the wind noise is very obvious, so that not only does it listen to itself. The voice signal transmitted by the other party is unclear, and the wind noise signal is transmitted to the other party's earpiece side through the microphone, so that the other party can't hear the voice signal of the other party, which causes a great obstacle to the communication between the two parties, which seriously affects the effect and quality of the call. . Summary of the invention
鉴于上述的分析， 本发明旨在提供一种用于对移动终端降风噪的装置 及方法， 用以解决现有技术中由于风噪给移动终端带来的通话效果比较差 的问题。  In view of the above analysis, the present invention is directed to an apparatus and method for reducing wind noise of a mobile terminal, which solves the problem of poor communication effect brought to the mobile terminal by wind noise in the prior art.
本发明的目的主要是通过以下技术方案实现的：  The object of the present invention is mainly achieved by the following technical solutions:
本发明提供了一种用于对移动终端降风噪的装置， 包括： 风噪信号采 集模块、 风噪信号检测模块以及风噪信号处理模块， 其中，  The present invention provides a device for reducing wind noise on a mobile terminal, including: a wind noise signal acquisition module, a wind noise signal detection module, and a wind noise signal processing module, wherein
所述风噪信号采集模块， 用于采集外界的风噪信号， 并将其转换成电 信号输出给所述风噪信号检测模块以及所述风噪信号处理模块；  The wind noise signal acquisition module is configured to collect an external wind noise signal, and convert the same into an electric signal output to the wind noise signal detection module and the wind noise signal processing module;
所述风噪信号检测模块， 用于对所述风噪信号采集模块输出的风噪信 号进行检测， 并在确定需要进行降风噪处理时触发所述风噪信号处理模块； 所述风噪信号处理模块， 用于将所述风噪信号采集模块输出的风噪信 号进行滤波、 放大以及相位变换处理后输出到移动终端听筒。 The wind noise signal detecting module is configured to output a wind noise signal to the wind noise signal collecting module The detection is performed, and the wind noise signal processing module is triggered when it is determined that the wind noise reduction process is required; the wind noise signal processing module is configured to filter and amplify the wind noise signal output by the wind noise signal acquisition module. And the phase conversion process is output to the handset of the mobile terminal.
进一步地， 所述风噪信号检测模块具体用于， 对所述风噪信号采集模 块输出的风噪信号滤除高频干扰并放大， 然后判断其是否大于预定的风噪 信号阙值， 如果是， 触发所述风噪处理模块， 否则不作降噪处理。  Further, the wind noise signal detecting module is specifically configured to: filter the high frequency interference and amplify the wind noise signal output by the wind noise signal collecting module, and then determine whether the wind noise signal is greater than a predetermined wind noise signal threshold, if The wind noise processing module is triggered, otherwise no noise reduction processing is performed.
进一步地， 所述风噪信号处理模块具体包括： 滤波单元和反向放大单 元， 其中，  Further, the wind noise signal processing module specifically includes: a filtering unit and a reverse amplifying unit, where
所述滤波单元， 用于对所述风噪信号采集模块输出的风噪信号滤除低 频干扰后输出给所述反向放大单元；  The filtering unit is configured to filter the wind noise signal output by the wind noise signal acquisition module to filter the low frequency interference and output the signal to the reverse amplification unit;
所述反向放大单元， 用于将所述滤波单元输出的风噪信号依次进行放 大、 幅值和相位处理， 使输出的幅值与人耳侧的风噪信号幅值相同、 相位 相反。  The inverse amplifying unit is configured to sequentially perform amplification, amplitude and phase processing on the wind noise signal output by the filtering unit, so that the amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite.
进一步地， 还包括： 被动降风噪模块， 该模块包括： 单指向麦克风、 麦克风胶套， 其中，  Further, the method further includes: a passive wind noise module, the module includes: a single-point microphone, a microphone sleeve, wherein
所述单指向麦克风， 设置于移动终端壳体的预定位置， 其出声孔指向 移动终端前壳的进声孔；  The unidirectional microphone is disposed at a predetermined position of the mobile terminal housing, and the sound emitting hole is directed to the sound hole of the front shell of the mobile terminal;
所述麦克风胶套， 套在所述单指向麦克风上， 并且其开孔与所述单指 向麦克风的出声孔物理错开。  The microphone sleeve is sleeved on the single-pointing microphone, and the opening thereof is physically offset from the sound hole of the single-pointing microphone.
进一步地， 所述被动降风噪模块还包括： 孔状降风噪材料， 一面与移 动终端前壳紧密接触， 另一面与所述麦克风胶套紧密压接。  Further, the passive wind noise module further comprises: a hole-shaped wind noise material, one side is in close contact with the front end of the mobile terminal, and the other side is tightly pressed with the microphone rubber sleeve.
本发明还提供了一种用于对移动终端降风噪的方法， 包括：  The present invention also provides a method for reducing wind noise on a mobile terminal, including:
步驟 A: 采集外界的风噪信号， 并转换成电信号输出；  Step A: collecting the wind noise signal of the outside world and converting it into an electrical signal output;
步驟 B: 对步驟 A输出的风噪信号进行检测， 并在确定需要进行降风 噪处理时， 对其进行滤波、 放大以及相位变换处理后输出到移动终端听筒。 进一步地， 所述步驟 B具体包括 Step B: The wind noise signal outputted in step A is detected, and when it is determined that the wind noise reduction process is required, it is filtered, amplified, and phase-converted and output to the handset of the mobile terminal. Further, the step B specifically includes
对转换成电信号的风噪信号滤除高频干扰并放大；  Filtering high frequency interference and amplifying the wind noise signal converted into an electrical signal;
判断滤除高频干扰并放大后的风噪信号是否大于预定的风噪信号阙 值， 如果是， 对步驟 A输出的风噪信号滤除低频干扰， 并依次进行放大、 幅值和相位处理， 使输出的幅值与人耳侧的风噪信号幅值相同、 相位相反； 否则不作降噪处理。  Determining whether the high-frequency interference and the amplified wind noise signal are greater than a predetermined wind noise signal threshold, and if so, filtering the low-frequency interference on the wind noise signal outputted in step A, and sequentially performing amplification, amplitude, and phase processing, Make the amplitude of the output the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite; otherwise, no noise reduction processing is performed.
本发明有益效果如下：  The beneficial effects of the present invention are as follows:
本发明实施例通过增加主动降风噪和被动降风噪处理， 一方面改善自 己听筒侧的语音质量， 使自己能清晰的听到对方的语音； 另一方面改善对 方听筒侧的语音质量， 使对方能清晰的听到自己的语音， 使沟通更清晰、 流畅， 大大改善了用户在户外特别是有风情况下的通话效果。  In the embodiment of the present invention, by increasing the active wind noise and passive wind noise processing, on the one hand, the voice quality of the earpiece side is improved, so that the voice of the other party can be clearly heard; on the other hand, the voice quality of the other party's earpiece side is improved, so that The other party can clearly hear their own voice, make the communication clearer and smoother, and greatly improve the user's call performance in outdoor, especially windy situations.
本发明的其他特征和优点将在随后的说明书中阐述， 并且， 部分的从 说明书中变得显而易见， 或者通过实施本发明而了解。 本发明的目的和其 他优点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结 构来实现和获得。 附图说明  Other features and advantages of the invention will be set forth in the description in the description which follows. The objectives and other advantages of the invention will be realized and attained by the <RTI DRAWINGS
图 1为本发明实施例所述装置的结构示意图；  1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
图 2为本发明实施例中风噪信号处理模块的结构示意图；  2 is a schematic structural diagram of a wind noise signal processing module according to an embodiment of the present invention;
图 3为本发明实施例中被动降风噪模块的结构示意图；  3 is a schematic structural diagram of a passive wind noise reduction module according to an embodiment of the present invention;
图 4为本发明实施例所述方法的流程示意图。 具体实施方式  FIG. 4 is a schematic flowchart diagram of a method according to an embodiment of the present invention. detailed description
下面结合附图来具体描述本发明的优选实施例， 其中， 附图构成本申 请一部分， 并与本发明的实施例一起用于阐释本发明的原理。 为了清楚和 简化目的， 当其可能使本发明的主题模糊不清时， 将省略本文所描述的器 件中已知功能和结构的详细具体说明。 The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which FIG. For the sake of clarity and simplicity, the apparatus described herein will be omitted when it may obscure the subject matter of the present invention. A detailed description of the known functions and structures in the device.
首先， 结合附图 1对本发明实施例所述装置进行详细说明。  First, the device according to the embodiment of the present invention will be described in detail with reference to FIG.
如图 1所示， 图 1为本发明实施例所述装置的结构示意图， 具体可以 包括： 风噪信号采集模块 11、风噪信号检测模块 12以及风噪信号处理模块 As shown in FIG. 1, FIG. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, which may specifically include: a wind noise signal acquisition module 11, a wind noise signal detection module 12, and a wind noise signal processing module.
13 , 其中， 13 , where
风噪信号采集模块 11 , 用于采集外界的风噪信号， 并转换成电信号输 出到风噪信号检测模块 12以及风噪信号处理模块 13;  The wind noise signal acquisition module 11 is configured to collect the wind noise signal of the outside world, and convert it into an electric signal output to the wind noise signal detecting module 12 and the wind noise signal processing module 13;
风噪信号检测模块 12,用于对风噪信号采集模块 11输出的风噪信号进 行检测， 并在确定需要进行降风噪处理时， 触发风噪信号处理模块 13; 具 体地， 风噪信号检测模块 12对风噪信号采集模块 11输出的风噪信号滤除 高频干扰并放大， 然后判断其是否大于预定的风噪信号阈值， 如果是， 触 发风噪信号处理模块 13, 否则不作降噪处理。  The wind noise signal detecting module 12 is configured to detect the wind noise signal output by the wind noise signal collecting module 11 and trigger the wind noise signal processing module 13 when determining that the wind noise reduction processing is required; specifically, the wind noise signal detecting The module 12 filters out the high-frequency interference and amplifies the wind noise signal outputted by the wind noise signal acquisition module 11, and then determines whether it is greater than a predetermined wind noise signal threshold. If yes, the wind noise signal processing module 13 is triggered, otherwise no noise reduction processing is performed. .
风噪信号处理模块 13,用于将风噪信号采集模块 11输出的风噪信号进 行滤波、 放大以及相位变换处理后输出到移动终端听筒， 使之与听筒侧出 现的风噪信号相抵消， 从而实现主动降蜂噪的效果。  The wind noise signal processing module 13 is configured to filter, amplify, and phase convert the wind noise signal outputted by the wind noise signal acquisition module 11 to be output to the handset of the mobile terminal, so as to cancel the wind noise signal appearing on the handset side, thereby Achieve the effect of active noise reduction.
图 2为风噪信号处理模块 13的结构示意图， 如图 2所示， 风噪信号处 理模块 13主要包括： 滤波单元 131及反向放大单元 132; 其中，  2 is a schematic structural diagram of the wind noise signal processing module 13. As shown in FIG. 2, the wind noise signal processing module 13 mainly includes: a filtering unit 131 and an inverse amplifying unit 132;
滤波单元 131 ,用于对风噪信号采集模块 11采集的风噪信号进行处理， 滤除其中混杂的低频信号（主要为非语音信号）， 使进行反向、 放大处理的 信号更干净；  The filtering unit 131 is configured to process the wind noise signal collected by the wind noise signal collecting module 11 to filter out the mixed low frequency signal (mainly a non-speech signal), so that the signal for reverse and amplification processing is cleaner;
反向放大单元 132, 用于对滤波后的风噪信号依次进行放大、 幅值和相 位处理， 使其输出的幅值与人耳侧的风噪信号幅值相同、 相位相反， 进而 将风噪声抵消， 起到降风噪的效果。  The inverse amplifying unit 132 is configured to sequentially perform amplification, amplitude and phase processing on the filtered wind noise signal, so that the amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite, thereby the wind noise Offset, it has the effect of reducing wind noise.
以上几个模块主要起到主动降风噪的作用， 为了起到更好的降风噪效 果， 本发明实施例所述装置还可以包括： 被动降风噪模块； 图 3 为被动降 风噪模块的结构示意图， 如图 3 所示， 被动降风噪模块具体可以包括： 单 指向麦克风 31、 麦克风胶套 32以及孔状降风噪材料 33; 其中， The above several modules mainly play the role of active wind noise reduction. In order to achieve a better wind noise reduction effect, the device in the embodiment of the present invention may further include: a passive wind noise reduction module; The schematic diagram of the structure of the wind noise module, as shown in FIG. 3, the passive wind noise module may specifically include: a single-point microphone 31, a microphone sleeve 32, and a hole-shaped wind noise material 33;
单指向麦克风 31 , 其出声孔指向移动终端前壳 34上的进声孔； 麦克风胶套 32, 与单指向麦克风 31 物理连接， 套在单指向麦克风 31 上， 其开孔与单指向麦克风 31的出声孔物理错开，且与孔状降风噪材料 33 紧密压接， 封堵移动终端内部的噪声信号传递到麦克风； 同时， 孔状降风 噪材料 33与移动终端前壳 34紧密接触， 可以削弱外界进入麦克风的风噪 信号， 进而起到抑制对方听到风噪声的效果。  The unidirectional microphone 31 has an audible hole pointing to the sound hole on the front casing 34 of the mobile terminal; the microphone sleeve 32 is physically connected to the unidirectional microphone 31, and is sleeved on the unidirectional microphone 31, and the aperture and the unidirectional microphone 31 are provided. The sound hole is physically staggered, and is tightly pressed against the hole-shaped wind noise material 33, and the noise signal inside the mobile terminal is blocked and transmitted to the microphone; meanwhile, the hole-shaped wind noise material 33 is in close contact with the front cover 34 of the mobile terminal. It can weaken the wind noise signal from the outside into the microphone, and thus suppress the other party's hearing of wind noise.
接下来， 将结合附图 4对本发明实施例所述方法进行详细说明。  Next, the method described in the embodiment of the present invention will be described in detail with reference to FIG.
图 4为本发明实施例所述方法的流程示意图， 如图 4所示， 具体可以包 括如下步驟：  FIG. 4 is a schematic flowchart of a method according to an embodiment of the present invention. As shown in FIG. 4, the following steps may be specifically included:
步驟 401 : 采集外界的风噪信号， 并转换成电信号输出；  Step 401: collecting an external wind noise signal and converting it into an electrical signal output;
步驟 402: 对步驟 401输出的风噪信号进行检测， 并在确定需要进行降 风噪处理时， 对其进行滤波、 放大以及相位变换处理后输出到移动终端听 同。  Step 402: The wind noise signal outputted in step 401 is detected, and when it is determined that the wind noise reduction process is required, it is filtered, amplified, and phase-converted, and then output to the mobile terminal for listening.
所述步驟 402具体包括：  The step 402 specifically includes:
对转换成电信号的风噪信号滤除高频干扰并放大；  Filtering high frequency interference and amplifying the wind noise signal converted into an electrical signal;
判断滤除高频干扰并放大后的风噪信号是否大于预定的风噪信号阈 值， 如果是， 对步驟 401输出的风噪信号滤除低频干扰， 并依次进行放大、 幅值和相位处理， 使输出的幅值与人耳侧的风噪信号幅值相同、 相位相反； 否则不作降噪处理。  Determining whether the high-frequency interference is filtered and the amplified wind noise signal is greater than a predetermined wind noise signal threshold. If yes, filtering the low-frequency interference on the wind noise signal outputted in step 401, and sequentially performing amplification, amplitude, and phase processing. The amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite; otherwise, no noise reduction processing is performed.
综上所述， 本发明实施例提供了一种用于对移动终端降风噪的装置及 方法， 与一般的通讯移动终端相比， 本发明实施例增加了主动降风噪和被 动降风噪处理， 一方面改善自己听筒侧的语音质量， 使自己能清晰的听到 对方的语音； 另一方面改善对方听筒侧的语音质量， 使对方能清晰的听到 自己的语音， 使沟通更清晰、 流畅， 大大改善了用户在户外特别是有风情 况下的通话效果。 In summary, the embodiments of the present invention provide an apparatus and method for reducing wind noise of a mobile terminal. Compared with a general communication mobile terminal, the embodiment of the present invention increases active wind noise and passive wind noise. Processing, on the one hand, improve the voice quality of the handset side, so that you can clearly hear the other party's voice; on the other hand, improve the voice quality of the other party's handset side, so that the other party can clearly hear The voice of the user makes the communication clearer and smoother, which greatly improves the user's call effect in the outdoor, especially in windy situations.
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并 不局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本 发明的保护范围应该以权利要求书的保护范围为准。  The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

权利要求书 Claim
1、 一种用于对移动终端降风噪的装置， 其特征在于， 该装置包括： 风 噪信号采集模块、 风噪信号检测模块以及风噪信号处理模块， 其中，  A device for reducing wind noise on a mobile terminal, the device comprising: a wind noise signal acquisition module, a wind noise signal detection module, and a wind noise signal processing module, wherein
所述风噪信号采集模块， 用于采集外界的风噪信号， 并转换成电信号 输出给所述风噪信号检测模块以及所述风噪信号处理模块；  The wind noise signal acquisition module is configured to collect an external wind noise signal, and convert the signal into an electrical signal output to the wind noise signal detection module and the wind noise signal processing module;
所述风噪信号检测模块， 用于对所述风噪信号采集模块输出的风噪信 号进行检测， 并在确定需要进行降风噪处理时， 触发所述风噪信号处理模 块；  The wind noise signal detecting module is configured to detect a wind noise signal output by the wind noise signal collecting module, and trigger the wind noise signal processing module when determining that wind noise processing is required;
所述风噪信号处理模块， 用于将所述风噪信号采集模块输出的风噪信 号进行滤波、 放大以及相位变换处理后输出到移动终端听筒。  The wind noise signal processing module is configured to filter, amplify, and phase transform the wind noise signal output by the wind noise signal acquisition module, and output the wind noise signal to the handset of the mobile terminal.
2、 根据权利要求 1所述的装置， 其特征在于， 所述风噪信号检测模块 具体用于： 对所述风噪信号采集模块输出的风噪信号滤除高频干扰并放大， 然后判断滤除高频干扰并放大后的风噪信号是否大于预定的风噪信号阈 值， 如果是， 触发所述风噪处理模块， 否则不作降噪处理。  2. The device according to claim 1, wherein the wind noise signal detecting module is specifically configured to: filter high frequency interference and amplify the wind noise signal output by the wind noise signal collecting module, and then determine the filtering Except whether the high-frequency interference and the amplified wind noise signal is greater than a predetermined wind noise signal threshold, if yes, the wind noise processing module is triggered, otherwise no noise reduction processing is performed.
3、 根据权利要求 1所述的装置， 其特征在于， 所述风噪信号处理模块 进一步包括： 滤波单元及反向放大单元， 其中，  The apparatus according to claim 1, wherein the wind noise signal processing module further comprises: a filtering unit and a reverse amplifying unit, wherein
所述滤波单元， 用于对所述风噪信号采集模块输出的风噪信号滤除低 频干扰后输出给所述反向放大单元；  The filtering unit is configured to filter the wind noise signal output by the wind noise signal acquisition module to filter the low frequency interference and output the signal to the reverse amplification unit;
所述反向放大单元， 用于将所述滤波单元输出的风噪信号依次进行放 大、 幅值和相位处理， 使输出的幅值与人耳侧的风噪信号幅值相同、 相位 相反。  The inverse amplifying unit is configured to sequentially perform amplification, amplitude and phase processing on the wind noise signal output by the filtering unit, so that the amplitude of the output is the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite.
4、 根据权利要求 1至 3任一项所述的装置， 其特征在于， 该装置还包 括： 被动降风噪模块， 被动降风噪模块进一步包括： 单指向麦克风、 麦克 风胶套， 其中，  The device according to any one of claims 1 to 3, further comprising: a passive wind noise module, the passive wind noise module further comprising: a single-point microphone, a microphone sleeve, wherein
所述单指向麦克风， 设置于移动终端壳体的预定位置， 所述单指向麦 克风的出声孔指向移动终端前壳的进声孔； The unidirectional microphone is disposed at a predetermined position of the mobile terminal housing, and the single pointing wheat The sound hole of the wind is directed to the sound hole of the front shell of the mobile terminal;
所述麦克风胶套， 套在所述单指向麦克风上， 并且所述麦克风胶套的 开孔与所述单指向麦克风的出声孔物理错开。  The microphone sleeve is sleeved on the single-point microphone, and the opening of the microphone sleeve is physically offset from the sound hole of the single-point microphone.
5、 根据权利要求 4所述的装置， 其特征在于， 所述被动降风噪模块还 包括： 孔状降风噪材料， 所述孔状降风噪材料的一面与移动终端前壳紧密 接触， 另一面与所述麦克风胶套紧密压接。  The apparatus according to claim 4, wherein the passive wind noise reduction module further comprises: a hole-shaped wind noise material, one side of the hole-shaped wind noise material is in close contact with the front shell of the mobile terminal, The other side is tightly crimped to the microphone sleeve.
6、 一种用于对移动终端降风噪的方法， 其特征在于， 该方法包括： 采集外界的风噪信号， 并转换成电信号输出；  A method for reducing wind noise on a mobile terminal, the method comprising: collecting an external wind noise signal and converting the output into an electrical signal output;
对输出的转换成电信号的风噪信号进行检测， 并在确定需要进行降风 噪处理时， 对转换成电信号的风噪信号进行滤波、 放大以及相位变换处理 后输出到移动终端听筒。  The wind noise signal converted into an electrical signal is detected, and when it is determined that the wind noise reduction process is required, the wind noise signal converted into the electrical signal is filtered, amplified, and phase-converted and output to the handset of the mobile terminal.
7、 根据权利要求 6所述的方法， 其特征在于， 所述对输出的转换成电 信号的风噪信号进行检测， 并在确定需要进行降风噪处理时， 对转换成电 信号的风噪信号进行滤波、 放大以及相位变换处理后输出到移动终端听筒， 包括：  7. The method according to claim 6, wherein the detecting the wind noise signal converted into an electrical signal and detecting the wind noise converted into the electrical signal when determining that the wind noise reduction process is required The signal is filtered, amplified, and phase-converted and output to the handset of the mobile terminal, including:
对转换成电信号的风噪信号滤除高频干扰并放大；  Filtering high frequency interference and amplifying the wind noise signal converted into an electrical signal;
判断滤除高频干扰并放大后的风噪信号是否大于预定的风噪信号阈 值， 如果是， 对转换成电信号的风噪信号滤除低频干扰， 并依次进行放大、 幅值和相位处理， 使输出的幅值与人耳侧的风噪信号幅值相同、 相位相反； 否则不作降噪处理。  Determining whether the high-frequency interference and the amplified wind noise signal are greater than a predetermined wind noise signal threshold, and if so, filtering the low-frequency interference on the wind noise signal converted into the electrical signal, and sequentially performing amplification, amplitude, and phase processing, Make the amplitude of the output the same as the amplitude of the wind noise signal on the human ear side, and the phase is opposite; otherwise, no noise reduction processing is performed.
PCT/CN2011/078591 2011-05-20 2011-08-18 Device and method for reducing wind noise for mobile terminals WO2012159380A1 (en)

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