WO2014044064A1 - 一种自动控制手机双麦克风消噪的方法及手机 - Google Patents

一种自动控制手机双麦克风消噪的方法及手机 Download PDF

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Publication number
WO2014044064A1
WO2014044064A1 PCT/CN2013/077185 CN2013077185W WO2014044064A1 WO 2014044064 A1 WO2014044064 A1 WO 2014044064A1 CN 2013077185 W CN2013077185 W CN 2013077185W WO 2014044064 A1 WO2014044064 A1 WO 2014044064A1
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Prior art keywords
mobile phone
microphone
sound signal
noise
preset value
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PCT/CN2013/077185
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English (en)
French (fr)
Inventor
钟日丽
康挺
倪强波
吴新星
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惠州Tcl移动通信有限公司
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Publication of WO2014044064A1 publication Critical patent/WO2014044064A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion

Definitions

  • the invention relates to the field of communication devices, in particular to a method for automatically controlling double-microphone noise cancellation of a mobile phone and a mobile phone.
  • the mobile phone is equipped with a dual microphone noise canceling function, but it is usually based on a specific hardware chip, and the cost is high, and does not conform to the development trend of the thin and light mobile phone, and the final noise canceling effect is not ideal. There are still major limitations, and it is not convenient to transplant in various mobile phones.
  • the technical problem to be solved by the present invention is to provide a method for automatically controlling dual-microphone noise cancellation of a mobile phone and a mobile phone, which can automatically control whether the dual microphone cancellation function of the mobile phone is turned on or off, thereby providing convenience for the user. .
  • another technical solution adopted by the present invention is to provide a method for automatically controlling double-microphone noise cancellation of a mobile phone, comprising the steps of: A: when the mobile phone is in a call state, the mobile phone detects the mobile phone in real time through a proximity sensor installed in the mobile phone. The distance between the front side and the human ear, and the detected distance is compared with a preset value; wherein the step A specifically includes: detecting the front side of the mobile phone and the person in real time through the infrared sensing function of the proximity sensor installed in the mobile phone a distance of the ear, and comparing the detected distance with a preset value; B.
  • step B further includes the step of: B1, when detecting the front of the mobile phone and the person When the distance of the ear is less than or equal to the preset value, the automatic control turns on the dual microphone noise canceling function of the mobile phone, and controls to turn off the screen of the mobile phone; B2; Front of the phone to the human ear is detected distance is greater than the preset value, turn off the phone automatically controlled dual microphone noise cancellation, controlling the opening and the screen.
  • the implementation of the dual microphone noise canceling function in the step B includes the steps of: S0, the primary and secondary microphones disposed on the mobile phone form a microphone array; and the first microphone includes a first voice signal and ambient noise.
  • Acoustic signal ; collecting, by the sub-microphone, a second sound signal including ambient noise; S1, analyzing an environmental noise signal according to the second sound signal collected by the mobile phone sub-microphone; S2, controlling automatically generating an environmental noise signal An inverse signal having the opposite phase and the same amplitude; S3, performing the vector summation of the generated reverse signal having the opposite phase and the same amplitude as the ambient noise signal and the first sound signal collected by the mobile phone main microphone to obtain a clean User voice signal.
  • the step B is performed while performing the step of: performing echo cancellation processing on the first sound signal collected by the main microphone.
  • the echo cancellation processing is specifically: inputting a first sound signal entered by the main microphone and a third sound signal of the other party of the call output by the local speaker or the earpiece to the DSP echo feedback loop, and performing the DSP operation on the The first sound signal and the third sound signal are compared, the part of the first sound signal and the third sound signal are eliminated, and the echo-removed sound signal is output from the DSP echo feedback loop.
  • another technical solution adopted by the present invention is to provide a method for automatically controlling double-microphone noise cancellation of a mobile phone, wherein the method includes the following steps: A: When the mobile phone is in a call state, the proximity sensor installed inside the mobile phone is real-time. Detecting the distance between the front of the mobile phone and the human ear, and comparing the detected distance with a preset value; B. automatically controlling to turn on the dual microphone of the mobile phone when the detected distance is less than or equal to the preset value The noise canceling function; when the detected distance is greater than the preset value, the control turns off the dual microphone noise canceling function of the mobile phone.
  • the step B further includes the steps of: B1, when the detected distance between the front of the mobile phone and the human ear is less than or equal to the preset value, automatically controlling to turn on the dual microphone noise canceling function of the mobile phone to eliminate environmental noise, and control Turn off the screen of the mobile phone; B2.
  • the automatic control turns off the dual microphone noise canceling function of the mobile phone, and controls to turn on the mobile phone screen.
  • the step A specifically includes: detecting, by using an infrared sensing function of the proximity sensor installed in the mobile phone, a distance between the front of the mobile phone and the human ear in real time, and comparing the detected distance with a preset value.
  • the implementation of the dual microphone noise canceling function in the step B includes the steps of: S0, the primary and secondary microphones disposed on the mobile phone form a microphone array; and the main microphone includes a useful voice signal and ambient noise. a first sound signal; collecting, by the sub-microphone, a second sound signal including ambient noise; S1, analyzing an environmental noise signal according to the second sound signal collected by the mobile phone sub-microphone; S2, controlling automatically generating one and the environment An inverse signal having the opposite phase and the same amplitude of the noise signal; S3, performing the vector summation on the generated reverse signal having the opposite phase and the same amplitude as the ambient noise signal and the first sound signal collected by the mobile phone main microphone, Get a clean user voice signal.
  • the step B is performed at the same time: performing control for performing echo cancellation processing on the first sound signal collected by the main microphone.
  • the echo cancellation processing is specifically: inputting a first sound signal entered by the main microphone and a third sound signal of the other party of the call output by the local speaker or the earpiece to the DSP echo feedback loop, and performing the DSP operation on the The first sound signal and the third sound signal are compared, the part of the first sound signal and the third sound signal are eliminated, and the echo-removed sound signal is output from the DSP echo feedback loop.
  • a mobile phone that automatically controls the dual microphone denoising of the mobile phone, and includes: a detecting module, configured to detect the front side of the mobile phone and the human ear in real time when the mobile phone is in a call state. a judging module, configured to compare the distance detected by the detecting module with a preset value, and determine whether to open a dual microphone noise canceling function of the mobile phone; and the control module is configured to: when the determining module determines the When the distance is less than or equal to the preset value, the control noise canceling module starts to work; and when the determining module determines that the distance is greater than the preset value, the control noise canceling module stops working.
  • the mobile phone further includes: a noise canceling module, configured to suppress environmental noise during the call and ensure the quality of the call of the user.
  • the control module is further configured to: when the determining module determines that the distance between the front of the mobile phone and the human ear is less than or equal to the preset value, control the noise canceling module to start working, and automatically control to turn off the mobile phone screen; When the judging module judges that the distance between the front side of the mobile phone and the human ear is greater than the preset value, the control noise canceling module stops working, and automatically controls to turn on the mobile phone screen.
  • the mobile phone further includes a microphone array composed of a primary microphone and a secondary microphone; the primary microphone is configured to collect a first sound signal including a useful voice signal and ambient noise; and the secondary microphone is configured to collect a second sound including ambient noise.
  • the sound signal; the mobile phone further includes: an echo cancellation module, configured to perform echo cancellation processing on the first sound signal collected by the main microphone during the call; the noise cancellation module further includes: a first noise cancellation unit, configured to: Generating, according to the second sound signal used by the sub-microphone, a reverse signal having the opposite phase and the same amplitude as the current ambient noise; and a second noise canceling unit: the first used for collecting the reverse signal and the main microphone
  • the sound signals are vector added to eliminate ambient noise contained in the first sound signal.
  • the invention provides a method for automatically controlling the dual microphone denoising of a mobile phone and a mobile phone, and controls the double microphone denoising function of the mobile phone to be turned on or off in a simple and quick manner, when the user wants the other party to hear the sound of the environment in which he is located, Just remove the phone from the ear and leave the front of the phone unobstructed.
  • the phone will automatically control to turn off the dual microphone noise cancellation function, so that the other party can hear the real environment sound; when the user wants to make the call clearer and not affected by the environmental noise
  • the mobile phone will automatically turn on the dual microphone noise canceling function to eliminate the environmental noise and ensure the quality of the call.
  • the invention adds a new function to the mobile phone: automatic control can be turned on or off. Dual microphone noise canceling function, when the background sound is not needed, can also clearly talk in noisy environment; when background sound is needed, the real atmosphere of the scene can be transmitted to the other party to restore the real feeling of the call.
  • the invention does not need to add hardware components on the circuit board of the mobile phone, which is beneficial to the light and thin development of the mobile phone, and also facilitates control cost and porting between different mobile phone platforms, and has good noise elimination effect and simple user operation.
  • FIG. 1 is a flow chart of a preferred embodiment of a method for automatically controlling dual-microphone noise cancellation of a mobile phone according to the present invention.
  • FIG. 2 is a schematic block diagram of echo cancellation of the dual microphone noise canceling function of the present invention.
  • FIG. 3 is a schematic block diagram of a p-sensor proximity sensor controlling a dual microphone noise canceling function on/off according to a method for automatically controlling a dual microphone denoising of a mobile phone.
  • FIG. 4 is a flow chart of a specific algorithm of a method for automatically controlling double-microphone noise cancellation of a mobile phone according to the present invention.
  • Figure 5 is a block diagram showing the structure of a mobile phone of the present invention.
  • FIG. 6 is a block diagram showing a specific structure of a noise canceling module of a mobile phone according to the present invention.
  • the invention is a method for automatically controlling double-microphone noise cancellation of a mobile phone, wherein the mobile phone is provided with a primary and secondary microphone, and the primary microphone is generally located under the mobile phone, and collects a first sound signal including a useful voice signal and ambient noise.
  • the sub-microphone is generally a digital microphone, and mainly collects a second sound signal including ambient noise, which is generally located at the top of the fuselage or the upper part of the back near the earpiece, and is far away from the main microphone.
  • the dual microphone noise canceling function of the mobile phone in the embodiment of the present invention is a function for suppressing environmental noise, and the noise canceling function is implemented by using a combination of a DSP software algorithm and an audio tuning.
  • the principle of the environmental noise suppression is: a small microphone array composed of the main and sub-microphones; a main microphone collects a useful user voice signal and a first sound signal of environmental noise, and a sub-microphone collects ambient noise and a second portion of the second voice signal having a larger amplitude of the useful user voice signal; further, the slave microphone transmits the collected second sound signal to the noise reduction circuit, and the noise reduction circuit has a larger amplitude included therein
  • the useful user speech signal is filtered to obtain a pure ambient noise signal and passed through the DSP (Digital Signal Processing: Digital signal processing) performs real-time arithmetic processing to generate an inverted signal with the opposite phase and the same amplitude as the pure ambient noise.
  • DSP Digital Signal Processing: Digital signal processing
  • the generated reverse signal is vector-added to the first sound signal collected by the main microphone. Since the generated reverse signal has the opposite phase and the same amplitude as the ambient noise collected by the main microphone, the vectors are added. The ambient noise in the first sound signal collected by the main microphone can be cancelled out, thereby obtaining a clean user voice signal, which ensures the user can clearly communicate with the other party in a noisy environment.
  • FIG. 1 is a preferred method for automatically controlling the dual microphone denoising of the mobile phone.
  • Example flow chart. The method includes the steps of:
  • the distance between the mobile phone and the human ear is automatically detected in real time through the proximity sensor installed in the mobile phone, and the detected distance information is compared with a preset value to determine whether to open the dual microphone of the mobile phone. Noise cancellation.
  • the preset value can be set and stored in the mobile phone system when the mobile phone is shipped from the factory.
  • the dual microphone cancellation function of the mobile phone is turned on to suppress the environmental noise, and the mobile phone screen is also automatically controlled to save the consumption of the mobile phone.
  • the dual microphone noise canceling function of the mobile phone is turned off, the ambient noise is retained, that is, the mobile phone is allowed to collect and transmit the environmental sound to the calling party, and the screen of the mobile phone is automatically controlled to enable the user to clearly determine whether the mobile phone is transmitting to the other party.
  • the call state of the background sound provides convenience for the user.
  • the functional block diagram of the echo cancellation function of the dual microphone noise canceling function of the present invention specifically includes: a first sound signal entered by the main microphone (including a user voice signal and a voice signal of a part of the other party that the local speaker leaks in) MIC IN enters the DSP audio feedback loop L1, and the third sound signal of the other party output by the local speaker or handset is by Line IN enters the DSP audio feedback loop L1, and the two sound signals are input together to the DSP echo feedback loop L1, and the first sound signal entered by the MIC IN is processed by the DSP and by the Line
  • the third sound signal entered by the IN is compared, the part of the first sound signal that is the same as the third sound signal is eliminated, and the echo signal after the echo cancellation is passed through the Line. OUT output.
  • the distance between the front of the mobile phone and the human ear is automatically detected in real time through the infrared sensing function of the p-sensor proximity sensor installed in the mobile phone.
  • the specific implementation manner is: automatically detecting the distance between the front of the mobile phone and the human ear through the infrared sensing technology of the p-sensor, and transmitting the detected distance information to the upper application to determine whether to open the dual microphone noise canceling function of the mobile phone.
  • the p-sensor listening event needs to occupy the mobile phone CPU resources and consume the mobile phone power.
  • FIG. 3 is a schematic block diagram of a p-sensor control dual microphone noise canceling function switch for automatically controlling a dual microphone denoising method of a mobile phone according to the present invention.
  • the call relationship is as follows:
  • the phone is connected to the call, the phone app of the phone's phone app detects the occurrence of the event.
  • the p-sensor driver controls the detected distance to be reported.
  • the detected distance is reported to the upper-layer phone application by the input subroutine.
  • the upper phone application phone app passes the p-sensor
  • the app interface reads the distance between the front of the mobile phone and the human ear reported by the input subroutine.
  • the app control sends a message that closes the phone screen and turns on the dual microphone noise canceling function to the dual microphone denoising app interface.
  • upper phone application phone sends a message to open the phone screen and turn off the dual microphone noise canceling function to the dual microphone denoising app interface.
  • the related program of the audio manager obtains the upper-layer phone application phone through the dual-microphone denoising app interface.
  • FIG. 4 is a flowchart of a specific algorithm of a method for automatically controlling a dual microphone denoising of a mobile phone according to the present invention. Including the following steps. :
  • the mobile phone connects to the phone and enters the call state.
  • the p-sensor listener event in the app the driver of the p-sensor will detect the distance between the front of the phone and the obstruction, which is the distance from the human ear in this embodiment. Reading the distance information distance detected by the p-sensor, and reporting the detected distance information distance to the phone application described in the upper layer through the input subsystem in real time, the p-sensor in the phone application The app interface reads the distance information reported by the input subsystem.
  • step 22 comparing the distance information distance with a set distance threshold threshold. If the distance information is less than or equal to the preset threshold, proceed to step 23, otherwise proceed to step 27.
  • the distance information distance is less than or equal to the preset threshold threshold, it indicates that the user closes the front of the mobile phone to the ear to perform a normal call.
  • Phone app phone The app controls to send a broadcast SendBroadcast() that turns on the dual microphone cancellation function of the mobile phone to the dual microphone denoising app.
  • the dual microphone denoising app interface sets the denoising enable state to enable. Status, triggers the dual microphone noise cancellation function of the phone, and also controls the screen of the phone to be turned off.
  • step 26 Performing vector addition on the reverse signal and the first sound signal collected by the main microphone to eliminate the noise signal in the main microphone. Go to step 29.
  • the phone application phone controls to send a broadcast that prohibits the dual microphone cancellation function of the mobile phone to the dual microphone app.
  • the dual microphone app interface sets the noise cancellation enable state to the disable state, that is, controls the duality of the mobile phone.
  • the microphone noise canceling function also turns on the screen of the phone.
  • the collected ambient sound is processed by the audio tuning and transmitted to the calling party.
  • the method for automatically controlling the dual microphone denoising of the mobile phone adds a new function to the mobile phone. If the user wants the other party to hear the real environment sound of the party, the mobile phone is removed from the ear. If there is no obstruction on the front of the mobile phone, the mobile phone will automatically turn off the dual microphone noise cancellation function to let the other party hear the real environment sound; if the user wants to make the call clear and does not want the other party to hear the ambient noise, just close the mobile phone. When the ear is in a normal call position, the mobile phone will turn on the dual microphone noise canceling function to eliminate the noise around the user, so that the caller feels that the side is very quiet and the call quality is guaranteed.
  • the embodiment of the present invention further provides a mobile phone using the method for automatically controlling dual microphone denoising as described above.
  • the mobile phone includes:
  • the detecting module 310 is configured to detect the distance between the front of the mobile phone and the human ear in real time when the mobile phone is in a call state.
  • the determining module 320 is configured to compare the distance detected by the detecting module with a preset value, and determine whether to open the dual microphone noise canceling function of the mobile phone.
  • the control module 330 is configured to: when the determining module determines that the distance is less than or equal to the preset value, control the noise cancellation module to start working; and when the determining module determines that the distance is greater than the preset When the value is set, the control noise canceling module stops working.
  • the noise cancellation module 340 is configured to suppress ambient noise during the call and ensure the quality of the user's call;
  • the echo cancellation module 350 is configured to cancel the echo signal included in the sound signal transmitted to the other party during the call. Specifically, the same sound signal portion as the third sound signal of the other party of the call outputted by the local speaker or the earpiece is recognized from the first sound signal entered by the main microphone, and the partial sound signal is from the first sound signal. Remove.
  • control module 330 is further configured to: when the determining module determines that the detected distance between the front of the mobile phone and the human ear is less than or equal to the preset value, control the noise canceling module to start working, and automatically control to turn off the mobile phone. a screen; and configured to control the noise canceling module to stop working when the determining module determines that the detected distance between the front of the mobile phone and the human ear is less than or equal to the preset value, and control to turn on the mobile phone screen.
  • the noise cancellation module 340 further includes:
  • the first noise unit 401 is configured to generate a reverse signal having the same phase and the same amplitude as the ambient noise according to the sound signal collected by the secondary microphone.
  • the second noise cancellation unit 402 is configured to perform vector summation on the reverse signal and the first sound signal collected by the main microphone to eliminate ambient noise included in the first sound signal.
  • the present invention provides a method for automatically controlling dual-microphone noise cancellation of a mobile phone and a mobile phone, which automatically controls the function of turning off or off the dual microphone of the mobile phone through infrared sensing technology, when the user wants the other party to hear where he is.
  • the phone When the sound of the environment is removed from the ear and the front of the phone is not covered, the phone will automatically control to turn off the dual microphone noise cancellation function, so that the other party can hear the real environment sound; when the user wants to make the call clearer, When it is affected by environmental noise, as long as the mobile phone is placed close to the ear to maintain a normal call posture, the mobile phone will automatically turn on the dual microphone noise canceling function to eliminate the environmental noise and ensure the call quality.
  • the present invention adds a new function to the mobile phone: Automatic control to turn the dual microphone denoising function on or off.
  • the call can be clearly communicated in a noisy environment.
  • the background sound is needed, the real atmosphere of the scene can be transmitted to the other party to restore the true nature of the call. sense.
  • the invention does not need to add hardware originals on the circuit board of the mobile phone, which is beneficial to the light and thin development of the mobile phone, and adopts double insurance in the noise elimination processing, that is, the combination of the DSP software algorithm and the audio tuning, the noise cancellation effect is good, and at the same time It is also convenient to control the cost and porting between different mobile phone platforms. It only needs to transplant the DSP algorithm and fine-tune the mobile phone audio tuning with the specific hardware structure.
  • the method and the mobile phone of the invention are simple in operation and convenient for the user.

Abstract

本发明公开了一种自动控制手机双麦克风消噪的方法及手机，所述方法包括步骤：手机处于通话状态时，通过安装在手机内部的接近传感器自动实时检测手机正面与人耳的距离，并将所述检测到的距离信息与一预设值进行比对；当所述检测到的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能；当所述检测到的距离大于所述预设值时，自动控制关闭手机的双麦克风消噪功能。通过本发明，当用户希望在嘈杂的环境中清楚的通话时，只需将手机以正常的方式靠近耳部即可；当需要背景声音时，只需将手机从耳部旁边拿开便可将现场的声音传送给对方。无需增设硬件元器件，消噪效果好，为用户提供了方便。

Description

一种自动控制手机双麦克风消噪的方法及手机
【技术领域】
本发明涉及通信设备领域，尤其涉及的是一种自动控制手机双麦克风消噪的方法及手机。
【背景技术】
随着移动通信技术的普及，使用手机等移动终端进行语音通话是手机等移动终端最基本的功能，其中通话效果是用户颇为关注的一个问题。当用户处于不同的场景下，希望能有不同的语音通话效果。比如，在嘈杂的环境下通话时，用户希望环境噪声小、语音清晰、声音保真度高的语音通话效果；而当在演唱会现场等，用户希望让通话对方也能感受到当前所处环境的热闹氛围，则希望保留背景声音。现有技术中已有手机标配了双麦克风消噪功能，但通常是基于特定的硬件芯片实现，成本偏高，且不符合手机轻薄化的发展趋势，同时最终的消噪效果也不是很理想，还存在较大的局限性，不便于在各种手机中移植。
因此，现有技术还有待于改进和发展。
【发明内容】
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种自动控制手机双麦克风消噪的方法及手机，可自动控制开启或关闭手机双麦克风消噪功能，为用户提供了方便。
为解决上述技术问题，本发明采用的另一个技术方案是提供一种自动控制手机双麦克风消噪的方法，包括步骤：A、手机处于通话状态时，通过安装在手机内部的接近传感器实时检测手机正面与人耳的距离，并将检测到的距离与一预设值进行比对；其中，所述步骤A中具体包括：通过安装在手机内的接近传感器的红外感应功能实时检测手机正面与人耳的距离，并将所述检测到的距离与一预设值进行比对；B、当所述检测到的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能消除环境噪声；当所述检测到的距离大于所述预设值时，控制关闭手机的双麦克风消噪功能；其中，所述步骤B中进一步包括步骤：B1、当检测到的手机正面与人耳的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能，并控制关闭手机屏幕；B2、当检测到的手机正面与人耳的距离大于所述预设值时，自动控制关闭手机的双麦克风消噪功能，并控制开启手机屏幕。
其中，所述步骤B中的双麦克风消噪功能的实现包括步骤：S0、在手机上设置的主、副麦克风组成麦克风阵列；通过所述主麦克风采集包括有用的语音信号和环境噪音的第一声音信号；通过所述副麦克风采集包括环境噪音的第二声音信号；S1、根据手机副麦克风采集到的第二声音信号分析得出环境噪声信号；S2、控制自动生成一个与所述环境噪声信号相位相反、振幅相同的反向信号；S3、将所述生成的与所述环境噪声信号相位相反、振幅相同的反向信号与手机主麦克风采集到的第一声音信号进行矢量相加，得到干净的用户语音信号。
其中，所述步骤B执行同时还执行步骤：控制对主麦克风采集到的第一声音信号进行回音消除处理。
其中，所述回音消除处理具体为：将由主麦克风进入的第一声音信号，以及由本机扬声器或听筒输出的通话对方的第三声音信号一起输入到DSP回音反馈回路，经过DSP运算对所述第一声音信号和第三声音信号进行比较，消除所述第一声音信号中和第三声音信号相同的那一部分信号，再将经过回音消除后的声音信号从DSP回音反馈回路输出。
为解决上述技术问题，本发明采用的另一个技术方案是提供一种自动控制手机双麦克风消噪的方法，其中，包括步骤：A、手机处于通话状态时，通过安装在手机内部的接近传感器实时检测手机正面与人耳的距离，并将检测到的距离与一预设值进行比对；B、当所述检测到的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能；当所述检测到的距离大于所述预设值时，控制关闭手机的双麦克风消噪功能。
其中，所述步骤B中进一步包括步骤：B1、当检测到的手机正面与人耳的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能消除环境噪声，并控制关闭手机屏幕；B2、当检测到的手机正面与人耳的距离大于所述预设值时，自动控制关闭手机的双麦克风消噪功能，并控制开启手机屏幕。
其中，所述步骤A中具体包括：通过安装在手机内的接近传感器的红外感应功能实时检测手机正面与人耳的距离，并将所述检测到的距离与一预设值进行比对。
其中，所述步骤B中的所述双麦克风消噪功能的实现包括步骤：S0、在手机上设置的主、副麦克风组成麦克风阵列；通过所述主麦克风采集包括有用的语音信号和环境噪音的第一声音信号；通过所述副麦克风采集包括环境噪音的第二声音信号；S1、根据手机副麦克风采集到的第二声音信号分析得出环境噪声信号；S2、控制自动生成一个与所述环境噪声信号相位相反、振幅相同的反向信号；S3、将所述生成的与所述环境噪声信号相位相反、振幅相同的反向信号与手机主麦克风采集到的第一声音信号进行矢量相加，得到干净的用户语音信号。
其中，所述步骤B执行的同时还执行：控制对主麦克风采集到的第一声音信号进行回音消除处理。
其中，所述回音消除处理具体为：将由主麦克风进入的第一声音信号，以及由本机扬声器或听筒输出的通话对方的第三声音信号一起输入到DSP回音反馈回路，经过DSP运算对所述第一声音信号和第三声音信号进行比较，消除所述第一声音信号中和第三声音信号相同的那一部分信号，再将经过回音消除后的声音信号从DSP回音反馈回路输出。
为解决上述技术问题，本发明采用的再一个技术方案是提供一种自动控制手机双麦克风消噪的手机，其中，包括：检测模块，用于在手机通话状态时实时检测手机正面与人耳的距离；判断模块，用于将所述检测模块检测到的所述距离与一预设值进行比对，判断是否打开手机的双麦克风消噪功能；控制模块，用于当判断模块判断出所述距离小于或等于所述预设值时，控制消噪模块开始工作；以及用于当判断模块判断出所述距离大于所述预设值时，控制消噪模块停止工作。
其中，所述的手机还包括：消噪模块，用于在通话过程中抑制环境噪声，保证用户的通话质量。
其中，所述控制模块还用于：当判断模块判断出所述手机正面与人耳的距离小于或等于所述预设值时，控制消噪模块开始工作，并自动控制关闭手机屏幕；以及当判断模块判断出所述手机正面与人耳的距离大于所述预设值时，控制消噪模块停止工作，并自动控制开启手机屏幕。
其中，所述手机还包括由主、副麦克风组成麦克风阵列；所述主麦克风用于采集包括有用的语音信号和环境噪音的第一声音信号；所述副麦克风用于采集包括环境噪音的第二声音信号；所述手机还包括：回音消除模块，用于在通话过程中对主麦克风采集到的第一声音信号进行回音消除处理；所述消噪模块进一步包括：第一消噪单元，用于根据所述副麦克风用于采集到的第二声音信号生成一个与当前环境噪声相位相反、振幅相同的反向信号；第二消噪单元：用于将反向信号和主麦克风采集到的第一声音信号进行矢量相加，以消除中所述第一声音信号所包含的环境噪声。
本发明所提供的一种自动控制手机双麦克风消噪的方法及手机，通过简单快捷的方式控制打开或关闭手机双麦克风消噪功能，当用户想让对方听到自己所处环境的声音时，只要将手机从耳部移开，让手机正面没有遮挡物，手机就会自动控制关闭双麦克风消噪功能，从而让对方听到真实环境声音；当用户想让通话更清晰不被环境噪声影响时，只要将手机贴近耳部保持正常通话姿势，手机就会自动打开双麦克风消噪功能，将环境噪声消除，保证了通话质量，通过本发明使手机增加了新的功能：可自动控制打开或关闭双麦克风消噪功能，当不需要背景声音时，在嘈杂的环境中也能清楚的通话；当需要背景声音时，可以将现场的真实气氛传送给对方，还原通话的真实感。同时，本发明无需在手机的电路板上增设硬件元器件，有利于手机的轻薄化发展，同时也便于控制成本和在不同手机平台之间进行移植，且其消噪效果好，用户操作简单。
【附图说明】
图1是本发明一种自动控制手机双麦克风消噪的方法的较佳实施例流程图。
图2 是本发明的双麦克风消噪功能的回音消除的原理框图。
图3是本发明一种自动控制手机双麦克风消噪的方法的p-sensor接近传感器控制双麦克风消噪功能开/关的原理框图。
图4是本发明一种自动控制手机双麦克风消噪的方法的具体算法流程图。
图5是本发明一种手机的结构框图。
图6是本发明一种手机的消噪模块的具体结构框图。
【具体实施方式】
为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明为一种自动控制手机双麦克风消噪的方法，其中所述手机上设置有主、副麦克风，所述主麦克风一般位于手机下方，采集包括有用的语音信号和环境噪音的第一声音信号；副麦克风一般是数字麦克风，主要采集包括环境噪音的第二声音信号，一般是位于机身顶部或者背面上部靠近听筒的位置，并尽量远离所述主麦克风的地方。
进一步的，本发明实施例的手机双麦克风消噪功能为抑制环境噪声的功能，具体通过采用DSP软件算法和音频调谐结合的方式实现所述消噪功能。
较佳的，其中所述环境噪声抑制的原理为：由所述主、副麦克风组成的小型麦克风阵列；主麦克风采集有用的用户语音信号以及环境噪声的第一声音信号，副麦克风采集环境噪音以及小部分幅值较大的有用用户语音信号的第二声音信号；进一步的，所述副麦克风将采集到的第二声音信号传送到降噪电路，降噪电路将其中所包含的幅值较大的有用用户语音信号滤除从而得到纯正的环境噪声信号，并通过DSP（Digital Signal Processing：数字信号处理）进行实时运算处理，生成一个与纯正环境噪声相位相反、振幅相同的反向信号。将所述生成的反向信号与主麦克风采集到的第一声音信号进行矢量相加，由于所述生成的反向信号与主麦克风采集到的环境噪声相位相反、振幅相同，所以矢量相加后可将主麦克风采集到的第一声音信号中的环境噪声抵消掉，从而得到干净的用户语音信号，保证了用户在嘈杂的环境下和对方清楚的通话。
基于上述手机及其消噪原理，本发明提出的一种自动控制手机双麦克风消噪的方法，如图1所示，图1是本发明一种自动控制手机双麦克风消噪的方法的较佳实施例流程图。所述方法包括步骤：
S100、手机处于通话状态时，通过安装在手机内部接近传感器自动实时检测手机与人耳的距离，并将所述检测到的距离信息与一预设值进行比对，以判断是否打开手机双麦克风消噪功能。所述预设值可在手机出厂时即设置好存储在手机系统中。
S200、当所述检测到的所述距离小于等于所述预设值时，自动控制打开手机的双麦克风消噪功能，抑制环境噪声；当所述检测到的距离大于所述预设值时，则自动控制关闭手机的双麦克风消噪功能，手机可将采集到的环境声音传给通话对方。
较佳的，所述步骤S200中，打开手机双麦克风消噪功能，抑制环境噪声，同时还自动控制将手机屏幕关闭，以节省手机电量的消耗。而当关闭手机的双麦克风消噪功能，保留环境噪声，即允许手机采集并传输环境声音给通话对方，同时还自动控制打开手机的屏幕，以使用户可以清楚的判断出手机是否处于向对方传输背景声音的通话状态，为用户提供了方便。
进一步的，本实施例在通话的过程中，手机还自动对主麦克风采集的声音信号进行回音消除处理，所述回音消除处理的实现是基于DSP音频反馈回路完成。如图2所示，图2 为本发明的双麦克风消噪功能的回音消除功能的原理框图，具体包括：由主麦克风进入的第一声音信号（包括有用用户语音信号和本机扬声器漏进去的部分通话对方的语音信号）由MIC IN进入DSP音频反馈回路L1，以及由本机扬声器或听筒输出的通话对方的第三声音信号由Line IN进入DSP音频反馈回路L1，所述两路声音信号一起输入到所述DSP回音反馈回路L1后，经过DSP运算对由MIC IN进入的第一声音信号和由Line IN进入的第三声音信号进行比较，消除所述第一声音信号中与第三声音信号相同的那一部分信号，再将经过回音消除后的声音信号通过Line OUT输出。需要说明的时，所述回音消噪处理并不受所述步骤S200的影响，即在通话过程中，无论手机的双麦克风消噪功能为打开还是关闭，所述回音消噪处理的步骤都会执行。
较佳的，所述步骤S100中，通过安装在手机内的p-sensor接近传感器的红外感应功能自动实时检测手机正面与人耳的距离。具体实现方式为：通过p-sensor的红外感应技术自动实时的检测手机正面与人耳的距离，并将检测的距离信息传递给上层应用以决定是否打开手机的双麦克风消噪功能。其中p-sensor监听事件需要占用手机CPU资源和消耗手机电量，为了使手机的功耗要求尽可能小，因此仅在手机通话过程中执行，即只有在手机系统的电话应用程序phone app启动后p-sensor才开始工作，因此可将此p-sensor监听事件嵌入到phone app事件中，而不需要单独设计一个后台服务程序，从而节省手机CPU资源。
较佳的，在所述步骤S100之前，在手机系统的上层电话应用程序phone app里提供两个接口：p-sensor的应用程序p-sensor app接口和双麦克风消噪的app接口。如图3所示，图3是本发明一种自动控制手机双麦克风消噪的方法的p-sensor控制双麦克风消噪功能开关的原理框图。其中包括p-sensor接近传感器的相关程序001，上层电话应用程序phone app的相关程序 002，以及用于执行双麦克风消噪功能打开与关闭的音频管理器的相关程序003。其调用关系如下：
000、手机接通来电，手机的电话应用程序phone app检测到该事件的发生。
011、控制打开p-sensor的监听事件，实时检测手机正面与人耳的距离。
012、p-sensor驱动程序控制将检测到的距离进行上报。
013、所述检测到的距离通过input子程序上报给上层电话应用程序。
021、上层电话应用程序phone app的通过所述p-sensor app接口读取input子程序上报的手机正面与人耳的距离。
022、将所述距离与一预设值进行比对，判断是否大于所述预设值，当是时，进入024，否则进入023。
023、上层电话应用程序phone app控制发送一个关闭手机屏幕，开启双麦克风消噪功能的消息给所述双麦克风消噪的app接口。
024、上层电话应用程序phone app控制发送一个开启手机屏幕，关闭双麦克风消噪功能的消息给所述双麦克风消噪的app接口。
003、音频管理器的相关程序通过所述双麦克风消噪的app接口获取上层电话应用程序phone app发送的控制消息，并执行相应的双麦克风消噪的处理。
进一步的，下面举具体实施例对本发明所述控制双麦克风消噪的方法做一说明。如图4所示，图4为本发明所述自动控制手机双麦克风消噪的方法的具体算法流程图。包括如下步骤。：
20、手机接通电话，进入通话状态。
21、打开手机系统中电话应用程序phone app中的p-sensor监听事件，p-sensor的驱动程序将检测手机正面与遮挡物的距离，本实施例中即与人耳的距离。读取p-sensor检测到的距离信息distance，将检测到的距离信息distance通过input子系统实时上报上层所述的电话应用程序，所述电话应用程序中的p-sensor app接口读取input子系统上报的所述距离信息。
22，、将所述距离信息distance与设置好的一个距离门限值threshold进行比对。如果所述距离信息小于或者等于所述预设的门限值，则进入步骤23，否则进入步骤27。
23、当所述距离信息distance小于或者等于所述预设的门限值threshold时，表明用户将手机正面贴近耳部进行正常通话， 电话应用程序phone app控制发送一个开启手机双麦克风消噪功能的广播SendBroadcast()给双麦克风消噪的app，所述双麦克风消噪的app接口接收到所述广播后，控制将消噪使能状态设置为enable状态，触发打开手机的双麦克风消噪功能，同时还控制关闭手机的屏幕。
24、从副麦克法采集的第二声音信号中滤除有用声音信息（用户语音信息），得出噪声信号。
25、生成一个与所述噪声信号相位相反、振幅相同的反向信号。
26、将所述反向信号与主麦克风采集的第一声音信号进行矢量相加，消除主麦克风中的噪声信号。进入步骤29。
27、当所述距离信息大于所述预设的门限值，说明用户已将手机正面从耳部旁边拿开，想将自己所处环境的背景声音传递给通话对方，电话应用程序phone app控制发送禁止手机双麦克风消噪功能的广播给双麦克风的app，所述双麦克风的app接口接收到所述广播后，控制将消噪使能状态设置为disable状态，即控制关闭手机的双麦克风消噪功能，同时将手机的屏幕打开。
28、将采集到的环境声音通过音频调谐的处理后，传给通话对方。
29、继续上行的通话。
通过本发明上述实施例所述的自动控制手机双麦克风消噪的方法，使手机增加了新的功能，如果用户想让对方听到本方的真实环境声音，只要将手机从耳部移开，让手机正面没有遮挡物，手机就会自动关闭双麦克风消噪功能，让对方听到真实环境声音；如果用户想让通话变得清晰，不想让对方听到本方的环境噪声，只要将手机贴近耳部保持正常通话姿势，手机就会打开双麦克风消噪功能，将用户周围的噪声消除，让通话对方感觉这边很安静，保证了通话质量。
基于上述实施例，本发明实施例还提供了一种采用如上述所述一种自动控制双麦克风消噪的方法的手机，如图5所述，所述手机包括：
检测模块310，用于在手机通话状态时实时检测手机正面与人耳的距离。
判断模块320，用于将所述检测模块检测到的所述距离与一预设值进行比对，判断是否打开手机的双麦克风消噪功能。
控制模块330，用于当所述判断模块判断出所述距离小于或等于所述预设值时，控制消噪模块开始工作；以及用于当所述判断模块判断出所述距离大于所述预设值时，控制消噪模块停止工作。
消噪模块340，用于抑制通话过程中的环境噪声，保证用户通话质量；
回音消除模块350，用于在通话过程中将传送给通话对方的声音信号中所包含的回音信号消除。具体为从主麦克风进入的第一声音信号中识别出与由本机扬声器或听筒输出的通话对方的第三声音信号相同的声音信号部分，并将该部分声音信号从所述第一声音信号中去除。
较佳的，所述控制模块330还用于当判断模块判断出所述检测到的手机正面与人耳的距离小于等于所述预设值时，控制消噪模块开始工作，并自动控制关闭手机屏幕；以及用于当判断模块判断出所述检测到的手机正面与人耳的距离小于等于所述预设值时，控制消噪模块停止工作，并控制开启手机屏幕。
进一步的，如图6所示，所述消噪模块340进一步包括：
第一噪声单元401、用于根据副麦克风采集的声音信号产生一个与环境噪声相位相反、振幅相同的反向信号。
第二消噪单元402、用于将反向信号和主麦克风采集到的第一声音信号进行矢量相加，以消除中所述第一声音信号所包含的环境噪声。
综上所述，本发明提供的一种自动控制手机双麦克风消噪的方法及手机，通过红外感应技术自动控制打开或关闭手机双麦克风消噪的功能，当用户想让对方听到自己所处环境的声音时，只要将手机从耳部移开，让手机正面没有遮挡物，手机就会自动控制关闭双麦克风消噪功能，从而让对方听到真实环境声音；当用户想让通话更清晰不被环境噪声影响时，只要将手机贴近耳部保持正常通话姿势，手机就会自动打开双麦克风消噪功能，将环境噪声消除，保证了通话质量，通过本发明使手机增加了新的功能：可自动控制打开或关闭双麦克风消噪的功能，当不需要背景声音时，在嘈杂的环境中也能清楚的通话；当需要背景声音时，可以将现场的真实气氛传送给对方，还原通话的真实感。本发明无需在手机的电路板上增设硬件原件，有利于手机的轻薄化发展，同时在消噪处理上采用了双重保险，即DSP软件算法和音频调谐相结合的方式，消噪效果好，同时也便于控制成本和在不同手机平台之间进行移植，只需移植DSP算法，结合具体的硬件结构对手机音频调谐进行微调即可。此外，本发明所述方法及手机，操作简单，为用户提供了方便。
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (14)

  1. 一种自动控制手机双麦克风消噪的方法，其特征在于，包括步骤：
    A、手机处于通话状态时，通过安装在手机内部的接近传感器实时检测手机正面与人耳的距离，并将检测到的距离与一预设值进行比对；其中，所述步骤A中具体包括：通过安装在手机内的接近传感器的红外感应功能实时检测手机正面与人耳的距离，并将所述检测到的距离与一预设值进行比对；
    B、当所述检测到的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能消除环境噪声；当所述检测到的距离大于所述预设值时，控制关闭手机的双麦克风消噪功能；其中，所述步骤B中进一步包括步骤：
    B1、当检测到的手机正面与人耳的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能，并控制关闭手机屏幕；
    B2、当检测到的手机正面与人耳的距离大于所述预设值时，自动控制关闭手机的双麦克风消噪功能，并控制开启手机屏幕。
  2. 根据权利要求1所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤B中的双麦克风消噪功能的实现包括步骤：
    S0、在手机上设置的主、副麦克风组成麦克风阵列；通过所述主麦克风采集包括有用的语音信号和环境噪音的第一声音信号；通过所述副麦克风采集包括环境噪音的第二声音信号；
    S1、根据手机副麦克风采集到的第二声音信号分析得出环境噪声信号；
    S2、控制自动生成一个与所述环境噪声信号相位相反、振幅相同的反向信号；
    S3、将所述生成的与所述环境噪声信号相位相反、振幅相同的反向信号与手机主麦克风采集到的第一声音信号进行矢量相加，得到干净的用户语音信号。
  3. 根据权利要求2所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤B执行同时还执行步骤：控制对主麦克风采集到的第一声音信号进行回音消除处理。
  4. 根据权利要求3所述自动控制手机双麦克风消噪的方法，其特征在于，所述回音消除处理具体为：
    将由主麦克风进入的第一声音信号，以及由本机扬声器或听筒输出的通话对方的第三声音信号一起输入到DSP回音反馈回路，经过DSP运算对所述第一声音信号和第三声音信号进行比较，消除所述第一声音信号中和第三声音信号相同的那一部分信号，再将经过回音消除后的声音信号从DSP回音反馈回路输出。
  5. 一种自动控制手机双麦克风消噪的方法，其特征在于，包括步骤：
    A、手机处于通话状态时，通过安装在手机内部的接近传感器实时检测手机正面与人耳的距离，并将检测到的距离与一预设值进行比对；
    B、当所述检测到的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能消除环境噪声；当所述检测到的距离大于所述预设值时，控制关闭手机的双麦克风消噪功能。
  6. 根据权利要求5所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤B中进一步包括步骤：
    B1、当检测到的手机正面与人耳的距离小于或等于所述预设值时，自动控制打开手机的双麦克风消噪功能，并控制关闭手机屏幕；
    B2、当检测到的手机正面与人耳的距离大于所述预设值时，自动控制关闭手机的双麦克风消噪功能，并控制开启手机屏幕。
  7. 根据权利要求5所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤A中具体包括：通过安装在手机内的接近传感器的红外感应功能实时检测手机正面与人耳的距离，并将所述检测到的距离与一预设值进行比对。
  8. 根据权利要求6所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤B中的双麦克风消噪功能的实现包括步骤：
    S0、在手机上设置的主、副麦克风组成麦克风阵列；通过所述主麦克风采集包括有用的语音信号和环境噪音的第一声音信号；通过所述副麦克风采集包括环境噪音的第二声音信号；
    S1、根据手机副麦克风采集到的第二声音信号分析得出环境噪声信号；
    S2、控制自动生成一个与所述环境噪声信号相位相反、振幅相同的反向信号；
    S3、将所述生成的与所述环境噪声信号相位相反、振幅相同的反向信号与手机主麦克风采集到的第一声音信号进行矢量相加，得到干净的用户语音信号。
  9. 根据权利要求8所述自动控制手机双麦克风消噪的方法，其特征在于，所述步骤B执行同时还执行步骤：控制对主麦克风采集到的第一声音信号进行回音消除处理。
  10. 根据权利要求9所述自动控制手机双麦克风消噪的方法，其特征在于，所述回音消除处理具体为：
    将由主麦克风进入的第一声音信号，以及由本机扬声器或听筒输出的通话对方的第三声音信号一起输入到DSP回音反馈回路，经过DSP运算对所述第一声音信号和第三声音信号进行比较，消除所述第一声音信号中和第三声音信号相同的那一部分信号，再将经过回音消除后的声音信号从DSP回音反馈回路输出。
  11. 一种自动控制手机双麦克风消噪的手机，其特征在于，包括：
    检测模块，用于在手机通话状态时实时检测手机正面与人耳的距离；
    判断模块，用于将所述检测模块检测到的所述距离与一预设值进行比对，判断是否打开手机的双麦克风消噪功能；
    控制模块，用于当判断模块判断出所述距离小于或等于所述预设值时，控制消噪模块开始工作；以及用于当判断模块判断出所述距离大于所述预设值时，控制消噪模块停止工作。
  12. 根据权利要求11所述的手机，其特征在于，所述手机还包括：
    消噪模块，用于在通话过程中抑制环境噪声，保证用户的通话质量。
  13. 根据权利要求11所述的手机，其特征在于，所述控制模块还用于：
    当判断模块判断出所述手机正面与人耳的距离小于或等于所述预设值时，控制消噪模块开始工作，并自动控制关闭手机屏幕；以及当判断模块判断出所述手机正面与人耳的距离大于所述预设值时，控制消噪模块停止工作，并自动控制开启手机屏幕。
  14. 根据权利要求12所述的手机，其特征在于，所述手机还包括由主、副麦克风组成麦克风阵列；所述主麦克风用于采集包括有用的语音信号和环境噪音的第一声音信号；所述副麦克风用于采集包括环境噪音的第二声音信号；
    所述手机还包括：
    回音消除模块，用于在通话过程中对主麦克风采集到的第一声音信号进行回音消除处理；
    所述消噪模块进一步包括：
    第一消噪单元，用于根据所述副麦克风用于采集到的第二声音信号生成一个与当前环境噪声相位相反、振幅相同的反向信号；
    第二消噪单元：用于将反向信号和主麦克风采集到的第一声音信号进行矢量相加，以消除中所述第一声音信号所包含的环境噪声。
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