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WO2015180249A1 - 音频信号的消噪方法及系统 - Google Patents

音频信号的消噪方法及系统 Download PDF

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Publication number
WO2015180249A1
WO2015180249A1 PCT/CN2014/082544 CN2014082544W WO2015180249A1 WO 2015180249 A1 WO2015180249 A1 WO 2015180249A1 CN 2014082544 W CN2014082544 W CN 2014082544W WO 2015180249 A1 WO2015180249 A1 WO 2015180249A1
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WIPO (PCT)
Prior art keywords
audio signal
signal
processed
audio
denoising
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Ceased
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PCT/CN2014/082544
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English (en)
French (fr)
Inventor
籍国兴
李小棠
吴浩明
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ZTE Corp
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ZTE Corp
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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

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for canceling noise of an audio signal.
  • BACKGROUND Currently, in order to protect a mobile terminal from environmental noise during a call, two microphones are usually disposed on the mobile terminal, one of which is a primary microphone and the other is a secondary microphone, and a distance between the two microphones is required.
  • the main microphone When the mobile terminal is used for the call, the main microphone will collect the voice signal and the environmental noise signal, the secondary microphone will collect the ambient noise signal and a small amount of the voice signal, and the ambient noise signals collected by the two microphones are equal in size, and the collected
  • the speech signal has a large difference, and the signal acquired by the main microphone and the sub-microphone is subjected to differential amplification processing or digital signal processing to retain the speech signal, and the environmental noise is reduced.
  • a disadvantage of the prior art is that two microphones are disposed on a single terminal, and the distance between the two microphones is relatively close, and the noise cancellation effect is poor.
  • a primary object of the present invention is to improve the noise canceling effect on an audio signal.
  • a noise canceling method for an audio signal including: when a primary audio signal is generated by a primary microphone, acquiring other sub-microphones that are in communication with a first terminal in which the primary microphone is located a second audio signal; determining, from each of the second audio signals, a to-be-processed audio signal for performing noise cancellation processing according to a preset rule; performing noise cancellation processing on the first audio signal and the to-be-processed audio signal A third audio signal is obtained, and the third audio signal is output.
  • the step of determining the to-be-processed audio signal for performing the denoising process from each of the second audio signals according to a preset rule comprises: calculating the obtained first audio signal and each of the second audio signals a signal-to-noise ratio difference; determining a second audio signal whose signal-to-noise ratio difference is within a preset range, and setting the determined second audio signal as the to-be-processed audio signal.
  • the determining the second audio signal whose signal to noise ratio difference is within a preset range, and setting the determined second audio signal to the to-be-processed audio signal comprises: acquiring the signal noise a second audio signal whose ratio is greater than or equal to the first preset threshold; when the acquired second audio signal is one, the acquired second audio signal is set as the to-be-processed audio signal; When there are a plurality of audio signals, the second audio signal having the smallest difference in signal to noise ratio in the acquired second audio signal is set as the audio signal to be processed.
  • the step of setting the determined second audio signal to the to-be-processed audio signal further comprises: When the signal to noise ratio difference is less than the first preset threshold, the second audio signal having the largest signal to noise ratio difference is set as the to-be-processed audio signal.
  • the method further includes: continuing to acquire the audio signal to be processed in real time or timing a second audio signal generated by the secondary microphone; a first audio signal currently generated by the primary microphone and a second audio signal generated by the secondary microphone corresponding to the audio signal to be processed are subjected to denoising processing to obtain a third audio signal, and the output is The third audio signal is described. .
  • a noise cancellation system for an audio signal comprising: an acquisition module, configured to acquire, when the primary microphone generates the first audio signal, other ones that communicate with the terminal where the primary microphone is located a second audio signal generated by the secondary microphone; a selection module, configured to determine, from each of the second audio signals, a selected to-be-processed audio signal for performing noise cancellation processing according to a preset rule; and a processing module configured to: pair the first audio signal with the to-be-processed The audio signal is denoised to obtain a third audio signal; and the output module is configured to output the third audio signal.
  • the selecting module includes: a calculating unit configured to calculate a signal to noise ratio difference between the first audio signal and each of the second audio signals; and a determining unit configured to determine the signal to noise ratio difference a second audio signal that is within a preset range, and the determined second audio signal is set as the to-be-processed audio signal.
  • the determining unit includes: a searching subunit, configured to acquire a second audio signal whose signal to noise ratio difference is greater than or equal to a first preset threshold; determining a subunit, configured to be the second audio signal when acquired For one time, the acquired second audio signal is set as the to-be-processed audio signal; and when the acquired second audio signal is multiple, the obtained second audio signal has the smallest difference in signal-to-noise ratio The second audio signal is set to the audio signal to be processed.
  • the determining subunit is further configured to: when the signal to noise ratio difference is less than the first preset threshold, set a second audio signal with the maximum signal to noise ratio difference as the The audio signal to be processed.
  • the acquiring module is further configured to: after the output module outputs the third audio signal, continue to acquire the second audio signal generated by the secondary microphone corresponding to the to-be-processed audio signal in real time or timing; And performing a denoising process on the first audio signal currently generated by the main microphone and the second audio signal acquired by the acquiring module to obtain a third audio signal.
  • the method and system for denoising an audio signal when the main microphone generates the first audio signal, acquiring a second audio signal generated by each of the other sub-microphones that communicate with the first terminal where the main microphone is located, And determining a to-be-processed audio signal for performing denoising processing from each of the second audio signals according to a preset rule, and performing denoising processing on the first audio signal and the to-be-processed audio signal to obtain a third Tone
  • the frequency signal finally outputs the third audio signal that has been denoised.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for denoising an audio signal according to the present invention
  • FIG. 2 is a schematic flowchart of an embodiment of step S10 of FIG.
  • FIG. 4 is a schematic flowchart of an embodiment of step S20 of FIG. 1.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for denoising an audio signal according to the present invention
  • FIG. 5 is a schematic flowchart of an embodiment of step S22 of FIG. 4.
  • FIG. 6 is a schematic diagram of a noise canceling system for an audio signal according to the present invention.
  • FIG. 7 is a schematic diagram of functional modules of an acquisition module of an audio signal denoising system according to the present invention;
  • FIG. 8 is a schematic diagram of an embodiment of a selection module of an audio signal denoising system according to the present invention;
  • FIG. 9 is a schematic diagram of functional blocks of an embodiment of a determining unit of a noise canceling system for an audio signal according to the present invention.
  • the invention provides a method for denoising an audio signal.
  • 1 is a schematic flowchart of a first embodiment of a method for denoising an audio signal according to the present invention.
  • the method for denoising an audio signal includes: Step S10: acquiring, when the primary microphone generates a first audio signal, acquiring a second audio signal generated by each of the other sub-microphones in which the first terminal where the microphone is located communicates;
  • the primary microphone is a microphone disposed at a position closer to a sound source of the first terminal, and the primary microphone is capable of receiving a large amount of voice signals and ambient noise;
  • the secondary microphone is a microphone disposed on the second terminal or the first terminal. And the secondary microphone is far away from the sound source and can receive ambient noise and a small amount of voice signals (or no voice signals are received).
  • the number of the sub-microphones may be selected according to actual needs, and may be multiple.
  • the number of the second terminals may also be set according to actual needs, and the number of sub-microphones set on each second terminal may also be set according to actual needs.
  • a secondary microphone may be disposed on each of the second terminals.
  • a secondary microphone may be additionally disposed on the first terminal.
  • all the secondary microphones may also be disposed on the first terminal.
  • the terminal should be large enough.
  • the first terminal and the second terminal may be a mobile phone, an intelligent wearable device, an intelligent terminal, etc., and may be selected according to actual needs, which is not limited herein.
  • the above-mentioned audio signal denoising method can be used for mobile phone call noise cancellation, microphone denoising and the like. This embodiment is described by taking an example for denoising mobile phone calls.
  • the first terminal is configured as a mobile phone, and a primary microphone and a secondary microphone are respectively disposed on the first terminal; the second terminal is configured as a smart wearable device, and the number of the second terminals is two, and each second terminal is A sub microphone is set.
  • step S10 includes: Step S11: generating a first In the audio signal, the first terminal where the primary microphone is located sends a control signal to the second terminal where the other sub-microphones are located.
  • the first terminal includes a processor and a first wireless communication module
  • the second terminal includes The second wireless communication module, the first terminal and the second terminal communicate through the first wireless communication module and the second wireless communication module.
  • the first wireless communication module provided in this embodiment includes a Bluetooth chip and an antenna
  • the second wireless communication module also includes a Bluetooth chip and an antenna.
  • the first wireless communication module and the second wireless communication module may also be a WIFI module.
  • Each of the second terminals establishes a Bluetooth pairing with the first terminal, and the processor of the first terminal encodes the built-in control command to the Bluetooth chip of the first terminal, and the Bluetooth chip encodes the control command according to the Bluetooth AT command set. Then, the antenna is sent to the second wireless communication module of each second terminal via the antenna of the first terminal. Step S12, after receiving the control signal, each of the second terminals respectively opens respective sub-microphones to generate a second audio signal; In this embodiment, after the second terminal receives the control signal through the antenna, the Bluetooth chip of each second terminal performs radio frequency decoding on the Bluetooth radio frequency signal, and then performs baseband signal decoding, and the Bluetooth AT command is converted into a communication standard AT command.
  • Step S13 Each of the second terminals respectively sends the received second audio signal to the first terminal.
  • the processor of the second terminal performs A/D conversion and encoding on the acquired second audio signal, and then sends the second audio signal to the first terminal through the second wireless communication module.
  • the to-be-processed audio signal for performing the denoising process is determined from each of the second audio signals according to a preset rule.
  • the preset rule may be selected according to actual needs, as long as One of the plurality of second audio signals is determined to be an audio signal to be processed, and the to-be-processed audio signal can obtain a better noise cancellation effect.
  • Step S30 performing noise cancellation processing on the first audio signal and the to-be-processed audio signal to obtain a third audio signal, and outputting the third audio signal.
  • a good speech signal that is denoised is obtained, that is, a third audio signal.
  • the method for denoising an audio signal when the main microphone generates the first audio signal, acquiring a second audio signal generated by each of the other sub-microphones that communicate with the first terminal where the main microphone is located, and according to the pre-pre a rule for determining an audio signal to be processed for performing denoising processing from each of the second audio signals, and performing denoising processing on the first audio signal and the to-be-processed audio signal to obtain a third audio signal, Finally, the third audio signal subjected to the noise cancellation processing is output.
  • the first embodiment is as follows: the main microphone still generates the first audio signal in real time, and acquires a second audio signal generated by each of the other sub-microphones in communication with the first terminal where the main microphone is located;
  • the audio signal to be processed is selected from the second audio signal. That is, the sub-microphone corresponding to the audio signal to be processed is not unique, but is selected in real time according to a preset rule. That is to say, the new pending audio signal is re-determined according to the preset rule in real time.
  • the present embodiment passes the real-time Re-determining the new to-be-processed audio signal according to the preset rule, that is, continuously changing the to-be-processed audio signal to ensure that the currently used second audio signal is always the best to-be-processed audio signal, thereby further improving the noise cancellation effect on the audio signal.
  • the second embodiment is as described in FIG.
  • the method further includes: Step S40, continuing to acquire the second audio signal generated by the sub-microphone corresponding to the to-be-processed audio signal in real time or timing; Step S50, currently generating the main microphone
  • the first audio signal is denoised by the second audio signal generated by the sub-microphone corresponding to the to-be-processed audio signal to obtain a third audio signal, and the third audio signal is output.
  • the second audio signal that is determined to be output by the sub-microphone corresponding to the audio signal to be processed is still denoised; or a preset time is preset in the preset.
  • the second audio signal that was previously determined to be the sub-microphone output corresponding to the audio signal to be processed is still denoised during the time, and the new to-be-processed audio signal is re-determined after the preset time.
  • the noise cancellation method provided in this embodiment has high efficiency.
  • the following steps are further performed: turning off the sub-microphone corresponding to the other second audio signals that are not determined to be the audio signals to be processed.
  • the sub-microphone corresponding to the to-be-processed audio signal is determined, and the second audio signal generated by the sub-microphone is used for subsequent denoising processing.
  • turning off the sub-microphones other than the above-mentioned sub-microphone can save energy and prolong the service life of other microphones.
  • Step S20 includes: Step S21, calculating a signal-to-noise ratio difference between the first audio signal and each of the second audio signals.
  • the signal-to-noise ratio is a ratio between the maximum undistorted voice signal strength and the noise signal strength.
  • Step S22 Determine a second audio signal whose signal-to-noise ratio difference is within a preset range, and set the determined second audio signal to the to-be-processed audio signal. The specific implementation of the step S22 may be selected according to actual needs.
  • the preset range may be a numerical interval, for example, may be 3dB to 9dB, and then the second audio corresponding to the signal to noise ratio difference in the interval is searched for.
  • a signal when the second audio signal is found to be one, the second audio signal is directly connected to the audio signal to be processed; when the second audio signal is found to be multiple, one of the second audio signals may be selected as
  • a threshold may be further set, for example, the threshold is set to 6 dB, and a second audio signal closest to 6 dB is selected as the to-be-processed audio signal among the plurality of second audio signals that have been found.
  • the above preset range can also be set in other ways.
  • step S22 includes:
  • the second audio signal is obtained by using the second preset signal.
  • the first preset threshold may be selected according to actual needs. For example, it is set to 6 dB in this embodiment. First, all second audio signals having a signal-to-noise ratio difference between the first audio signal greater than or equal to 6 dB are first screened out.
  • step S22 may be specifically: when the signal to noise ratio difference is less than the first preset threshold, setting a second audio signal with the largest signal to noise ratio difference as the to-be-processed audio signal.
  • the second audio signal having the largest difference in signal-to-noise ratio between the first audio signal is used as The audio signal to be processed.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of a noise canceling system for an audio signal according to the present invention.
  • the functional block diagram shown in FIG. 6 is merely an exemplary diagram of a preferred embodiment, and those skilled in the art will surround the comparison system of the pictures in the library shown in FIG. 6.
  • Function modules which can be easily supplemented by new function modules; the names of the function modules are custom names, which are only used to assist in understanding the various program function blocks of the comparison system of pictures in the library, and are not used to define the technical solution of the present invention.
  • the core of the technical solution of the present invention is the function to be achieved by the function modules of the respective defined names.
  • the embodiment provides a noise cancellation system for an audio signal, including: an acquisition module 10, configured to acquire, when the primary microphone generates the first audio signal, acquire other sub-microphones that communicate with the first terminal where the primary microphone is located.
  • the second audio signal in this embodiment, the main microphone is a microphone disposed at a position closer to a sound source of the first terminal, the main microphone is capable of receiving a large amount of voice signals and ambient noise; and the sub-microphone is disposed at the second terminal or The microphone on the first terminal, and the secondary microphone is far away from the sound source, and can receive ambient noise or a small amount of voice signals (or no voice signals are received).
  • the number of the sub-microphones may be selected according to actual needs, and may be multiple.
  • the number of the second terminals may also be set according to actual needs, and the number of sub-microphones set on each second terminal may also be set according to actual needs.
  • a secondary microphone may be disposed on each of the second terminals.
  • a secondary microphone may be additionally disposed on the first terminal.
  • all the secondary microphones may also be disposed on the first terminal.
  • the terminal should be large enough.
  • the first terminal and the second terminal may be a mobile phone, an intelligent wearable device, an intelligent terminal, etc., and may be selected according to actual needs, which is not limited herein.
  • the above-mentioned audio signal denoising method can be used for mobile phone call noise cancellation, microphone denoising and the like. This embodiment is described by taking an example for denoising mobile phone calls.
  • the first terminal is configured as a mobile phone, and a primary microphone and a secondary microphone are respectively disposed on the first terminal;
  • the second terminal is configured as a smart wearable device, and the number of the second terminals is two, and each second terminal is A sub microphone is set.
  • the acquiring module 10 acquires a second audio signal generated by the other sub-microphones that communicate with the terminal where the main microphone is located. For example, as shown in FIG.
  • the obtaining module 10 includes: a first sending unit 11 When the primary microphone generates the first audio signal, the first terminal where the primary microphone is located sends a control signal to the second terminal where each of the other secondary microphones is located;
  • the first terminal includes a processor and a first wireless communication module
  • the second terminal includes a second wireless communication module, where the first terminal and the second terminal communicate by using the first wireless communication module and the second wireless communication module.
  • the first wireless communication module provided in this embodiment includes a Bluetooth chip and an antenna
  • the second wireless communication module also includes a Bluetooth chip and an antenna.
  • the first wireless communication module and the second wireless communication module may also be a WIFI module.
  • the processor of the first terminal When the user dials or connects the phone using the first terminal, the processor of the first terminal sends a command signal to control the MIC path in the first terminal baseband circuit to open the primary microphone and the secondary microphone on the first terminal, and passes the first wireless
  • the communication module transmits a control signal to the second wireless communication module of the second terminal.
  • Each of the second terminals establishes a Bluetooth pairing with the first terminal, and the processor of the first terminal encodes the built-in control command to the Bluetooth chip of the first terminal, and the Bluetooth chip encodes the control command according to the Bluetooth AT command set. Then, the antenna is sent to the second wireless communication module of each second terminal via the antenna of the first terminal.
  • the unit 12 is turned on, and after receiving the control signal, each of the second terminals respectively opens the respective sub-microphones to receive the second audio signal.
  • each of the second terminals respectively opens the respective sub-microphones to receive the second audio signal.
  • the Bluetooth chip of each second terminal performs radio frequency decoding of the Bluetooth radio frequency signal to perform baseband signal decoding
  • the Bluetooth AT command is converted into a communication standard AT command, and is sent to a processor of the second terminal, and the processor executes an AT command to control the MIC.
  • the baseband circuit turns on the corresponding secondary microphone to acquire the second audio signal.
  • a second sending unit 13 wherein each of the second terminals respectively sends the received second audio signal to the first terminal
  • the processor of the second terminal performs A/D conversion and encoding on the acquired second audio signal, and then sends the second audio signal to the first terminal through the second wireless communication module.
  • the selection module 20 is configured to determine the to-be-processed audio signal for performing the denoising process from each of the second audio signals according to a preset rule.
  • the preset rule may be selected according to actual needs. As long as one of the second audio signals is determined to be an audio signal to be processed from the plurality of second audio signals, and the audio signal to be processed can obtain a better noise cancellation effect.
  • the processing module 30 performs denoising processing on the first audio signal and the to-be-processed audio signal to obtain a third audio signal;
  • a good speech signal that is denoised is obtained, that is, a third audio signal.
  • the output module 40 is configured to output the third audio signal.
  • the denoising system of the audio signal when the main microphone generates the first audio signal, acquires a second audio signal generated by each of the other sub-microphones that communicate with the first terminal where the main microphone is located, and according to the pre-pre a rule for determining an audio signal to be processed for performing denoising processing from each of the second audio signals, and performing denoising processing on the first audio signal and the to-be-processed audio signal to obtain a third audio signal, Finally, the third audio signal subjected to the noise cancellation processing is output.
  • the first embodiment is as follows: The main microphone still generates the first audio signal in real time, and the acquisition module Obtaining a second audio signal generated by each of the other sub-microphones in communication with the first terminal in which the main microphone is located; the selection module 20 selects an audio signal to be processed from each of the second audio signals according to a preset rule. That is, the sub-microphone corresponding to the audio signal to be processed is not unique, but is selected in real time according to a preset rule. That is to say, the new pending audio signal is re-determined according to the preset rule in real time.
  • the embodiment is implemented in real time. Re-determining the new to-be-processed audio signal according to the preset rule, that is, continuously changing the to-be-processed audio signal to ensure that the currently used second audio signal is always the best to-be-processed audio signal, thereby further improving the noise cancellation effect on the audio signal.
  • the second implementation is as follows: the obtaining module 10 is further configured to continue to acquire the second audio signal generated by the secondary microphone corresponding to the to-be-processed audio signal in real time or timing; the processing module 30 is further configured to generate the first audio currently generated by the primary microphone. And performing a denoising process on the second audio signal generated by the sub-microphone corresponding to the to-be-processed audio signal to obtain a third audio signal, and outputting the third audio signal.
  • the second audio signal that is determined to be output by the sub-microphone corresponding to the audio signal to be processed is still denoised; or a preset time is preset in the preset.
  • the second audio signal that was previously determined to be the sub-microphone output corresponding to the audio signal to be processed is still denoised during the time, and the new to-be-processed audio signal is re-determined after the preset time.
  • the noise cancellation method provided in this embodiment has high efficiency.
  • the system further includes a shutdown module configured to turn off a secondary microphone corresponding to each of the other second audio signals that are not determined to be audio signals to be processed.
  • the sub-microphone corresponding to the to-be-processed audio signal is determined, and the second audio signal generated by the sub-microphone is used for subsequent denoising processing. After the determination is completed, turning off the sub-microphones other than the above-mentioned sub-microphone can save energy and prolong the service life of other microphones.
  • FIG. 8 is a schematic diagram of functional modules of a selection module of the noise canceling system of the audio signal according to the present invention.
  • the selecting module 20 includes: And determining, respectively, a signal-to-noise ratio difference between the first audio signal and each of the second audio signals; in this embodiment, the signal-to-noise ratio is a ratio between the maximum undistorted voice signal strength and the noise signal strength.
  • the determining unit 22 is configured to determine a second audio signal having a signal-to-noise ratio difference between the first audio signal and a predetermined range, and use the determined second audio signal as the to-be-processed audio signal.
  • the preset range may be a numerical interval, for example, may be 3 dB to 9 dB, and then find a second corresponding to the signal to noise ratio difference in the interval.
  • the audio signal when the second audio signal is found to be one, directly connects the second audio signal as the to-be-processed audio signal; when the second audio signal is found to be multiple, one of the second audio signals may be selected.
  • a threshold may be further set, for example, the threshold is set to 6 dB, and a second audio signal closest to 6 dB is selected as the to-be-processed audio signal among the plurality of second audio signals that have been found.
  • the determining unit S22 includes: The locating unit 221 is configured to obtain the second audio signal whose signal-to-noise ratio difference is greater than or equal to the first preset threshold.
  • the first preset threshold may be selected according to actual needs, for example, the implementation. In the example, it is set to 6 dB, and firstly all the second audio signals having a signal-to-noise ratio difference of greater than or equal to 6 dB with the first audio signal are filtered out.
  • Determining the sub-unit 222 configured to set the acquired second audio signal to the to-be-processed audio signal when the acquired second audio signal is one; and to acquire when the acquired second audio signal is multiple
  • the second audio signal having the smallest signal to noise ratio difference in the second audio signal is set as the to-be-processed audio signal.
  • the second audio signal that has been filtered out is one
  • the second audio signal is directly set as the audio signal to be processed.
  • the plurality of filtered second audio signals are plural, the second audio signal closest to 6 dB is set as the to-be-processed audio signal.
  • the determining unit 22 is further configured to set the second audio signal with the highest signal to noise ratio difference as the to-be-processed audio when the signal-to-noise ratio differences are both smaller than the first preset threshold. signal. That is, when the difference in signal-to-noise ratio between all the second audio signals and the first audio signal is less than 6 dB, the second audio signal having the largest difference in signal-to-noise ratio between the first audio signal is used as The audio signal to be processed.

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Abstract

一种音频信号的消噪方法和系统，在主麦克风产生第一音频信号时，获取与所述主麦克风所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号（S10）；按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处理音频信号（S20）；对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音频信号，输出所述第三音频信号（S30）。通过确定较佳的第二音频信号设定为待处理音频信号，利用该待处理音频信号与第一音频信号进行消噪处理，使得能够更好的消除噪声，提高了对音频信号的消噪效果。

Description

音频信号的消噪方法及系统 技术领域 本发明涉及通信领域， 尤其涉及一种音频信号的消噪方法及系统。 背景技术 目前， 为了使移动终端在通话过程中不受环境噪声的影响， 通常在移动终端上设 置两个麦克风， 其中一个为主麦克风， 另一个为副麦克风， 两麦克风之间需要具有一 定的距离， 当使用该移动终端进行通话时， 主麦克风将采集到语音信号和环境噪声信 号， 副麦克风将采集到环境噪声信号和少量语音信号， 两路麦克风采集到的环境噪声 信号大小相当， 而采集的语音信号存在较大差异， 通过将主麦克风和副麦克风采集的 信号进行差分放大处理或者数字信号处理后来保留语音信号， 并降低环境噪声。 现有技术的缺陷在于，在单个终端上设置两个麦克风，两麦克风之间的距离较近， 消噪效果较差。
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。 发明内容 本发明的主要目的在于提高对音频信号的消噪效果。 根据本发明的一个方面， 提供了一种音频信号的消噪方法， 包括： 在主麦克风产生第一音频信号时， 获取与所述主麦克风所在的第一终端进行通信 的其它各个副麦克风产生的第二音频信号； 按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处理音频 信号； 对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音频信号， 输 出所述第三音频信号。 优选地， 所述按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理 的待处理音频信号的步骤包括： 计算获得所述第一音频信号与各个第二音频信号之间的信噪比差值； 确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第二音频信号设 定为所述待处理音频信号。 优选地， 所述确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第 二音频信号设定为所述待处理音频信号的步骤包括： 获取所述信噪比差值大于或等于第一预设阈值的第二音频信号； 当获取的第二音频信号为一个时， 将获取的第二音频信号设定为所述待处理音频 信号； 当获取的第二音频信号为多个时， 将获取的第二音频信中信噪比差值最小的第二 音频信号设定为所述待处理音频信号。 优选地， 所述确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第 二音频信号设定为所述待处理音频信号的步骤还包括： 当所述各信噪比差值均小于所述第一预设阈值时， 将所述信噪比差值最大的第二 音频信号设定为所述待处理音频信号。 优选地， 所述按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理 的待处理音频信号的步骤之后还包括： 继续实时或定时获取所述待处理音频信号所对应的副麦克风产生的第二音频信 号； 对主麦克风当前产生的第一音频信号与所述待处理音频信号所对应的副麦克风产 生的第二音频信号进行消噪处理得到第三音频信号， 输出所述第三音频信号。。
根据本发明的另一方面， 还提供一种音频信号的消噪系统， 包括： 获取模块， 设置为在主麦克风产生第一音频信号时， 获取与所述主麦克风所在的 终端进行通信的其它各个副麦克风产生的第二音频信号； 选择模块， 设置为按照预设的规则从各个所述第二音频信号中确定用于进行消噪 处理的选择待处理音频信号； 处理模块， 设置为对所述第一音频信号与所述待处理音频信号进行消噪处理得到 第三音频信号； 输出模块， 设置为输出所述第三音频信号。 优选地， 所述选择模块包括： 计算单元， 设置为计算获得所述第一音频信号与各个第二音频信号之间的信噪比 差值； 确定单元， 设置为确定所述信噪比差值介于预设范围内的第二音频信号， 将确定 的第二音频信号设定为所述待处理音频信号。 优选地， 所述确定单元包括： 查找子单元， 设置为获取所述信噪比差值大于或等于第一预设阈值的第二音频信 号； 确定子单元， 设置为当获取的第二音频信号为一个时， 将获取的第二音频信号设 定为所述待处理音频信号； 以及当获取的第二音频信号为多个时， 将获取的第二音频 信中信噪比差值最小的第二音频信号设定为所述待处理音频信号。 优选地， 所述确定子单元还设置为当所述各信噪比差值均小于所述第一预设阈值 时， 将所述信噪比差值最大的第二音频信号设定为所述待处理音频信号。 优选地， 所述获取模块还设置为在所述输出模块输出第三音频信号之后， 继续实 时或定时获取所述待处理音频信号所对应的副麦克风产生的第二音频信号； 所述处理模块还设置为对主麦克风当前产生的第一音频信号与所述获取模块获取 到的第二音频信号进行消噪处理得到第三音频信号。
本发明实施例提出的音频信号的消噪方法和系统， 在主麦克风产生第一音频信号 时， 获取与所述主麦克风所在的第一终端进行通信的其它各个副麦克风产生的第二音 频信号， 并按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处 理音频信号， 再对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音 频信号， 最终输出经过消噪处理的第三音频信号。 通过在多个副麦克风产生的第二音 频信号中按照预设的规则进行选择， 并确定较佳的第二音频信号设定为待处理音频信 号，利用该待处理音频信号与第一音频信号进行消噪处理，使得能够更好的消除噪声， 提高了对音频信号的消噪效果。 附图说明 图 1为本发明音频信号的消噪方法第一实施例的流程示意图； 图 2为图 1中步骤 S10的一实施例的流程示意图； 图 3为本发明音频信号的消噪方法第二实施例的流程示意图； 图 4为图 1中步骤 S20的一实施例的流程示意图； 图 5为图 4中步骤 S22的一实施例的流程示意图； 图 6为本发明音频信号的消噪系统第一实施例的功能模块示意图； 图 7为本发明音频信号的消噪系统的获取模块一实施例的功能模块示意图； 图 8为本发明音频信号的消噪系统的选择模块一实施例的功能模块示意图； 以及 图 9为本发明音频信号的消噪系统的确定单元一实施例的功能模块示意图。
本发明目的的实现、 功能特点及优点将结合实施例， 参照附图做进一步说明。 具体实施方式 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。 本发明提供一种音频信号的消噪方法。 参照图 1， 图 1为本发明音频信号的消噪方法第一实施例的流程示意图， 该音频 信号的消噪方法包括： 步骤 S10， 在主麦克风产生第一音频信号时， 获取与所述主麦克风所在的第一终 端进行通信的其它各个副麦克风产生的第二音频信号； 本实施例中， 上述主麦克风为设于第一终端的较靠近音源位置的麦克风， 主麦克 风能够接收大量的语音信号和环境噪声； 上述副麦克风为设于第二终端或第一终端上 的麦克风， 且副麦克风离音源较远， 能够接收环境噪声和少量的语音信号 （或者接收 不到语音信号）。上述副麦克风的数量可以根据实际需要进行选择， 可以为多个， 第二 终端的数量也可以根据实际需要进行设置， 每个第二终端上设置的副麦克风的数量也 可以根据实际需要进行设置。例如， 可以每个第二终端上均设置一个副麦克风， 当然， 也可以另外在第一终端上设置一个副麦克风； 此外， 上述所有副麦克风也可以均设置 在第一终端上， 此时第一终端应足够大。 上述第一终端和第二终端可以为手机、 智能 可穿戴设备、 智能终端等， 具体可以根据实际需要进行选择， 在此不作限定。 上述音 频信号的消噪方法可以用于手机通话消噪、 话筒消噪等等。 本实施例以用于手机通话消噪为例进行说明。 上述第一终端设为手机， 且第一终 端上分别设置一主麦克风和一副麦克风； 上述第二终端设为智能可穿戴设备， 且第二 终端的数量为两个， 每一第二终端上均设置一个副麦克风。 在本实施例中， 获取与所述主麦克风所在的终端进行通信的其它各个副麦克风产 生的第二音频信号的具体实施例如图 2所示， 步骤 S10包括： 步骤 Sll， 在主麦克风产生第一音频信号时， 所述主麦克风所在的第一终端发送 控制信号至其他各个副麦克风所在的第二终端； 在本实施例中， 第一终端包括处理器和第一无线通信模块， 第二终端包括第二无 线通信模块， 第一终端和第二终端通过第一无线通信模块和第二无线通信模块进行通 信。 本实施例提供的第一无线通信模块包括蓝牙芯片和天线， 第二无线通信模块也包 括蓝牙芯片和天线。 在其他实施例中， 第一无线通信模块和第二无线通信模块也可以 为 WIFI模块。 用户在使用第一终端拨出或接通电话时， 第一终端的处理器发出命令信号控制第 一终端基带电路中的 MIC通路打开第一终端上的主麦克风和副麦克风，并通过第一无 线通信模块发送控制信号至第二终端的第二无线通信模块。 各第二终端分别与第一终 端建立蓝牙配对， 第一终端的处理器将内置的控制命令进行编码发送给第一终端的蓝 牙芯片， 该蓝牙芯片对所述控制命令按照蓝牙 AT指令集合进行编码后， 经第一终端 的天线发送给各第二终端的第二无线通信模块。 步骤 S12， 所述各第二终端接收到所述控制信号后， 分别打开各自的副麦克风以 产生第二音频信号； 在本实施例中， 各第二终端通过其天线接收到上述控制信号后， 各第二终端的蓝 牙芯片将蓝牙射频信号进行射频解码后进行基带信号解码， 蓝牙 AT指令转换为通信 标准 AT指令， 并发送给第二终端的处理器， 该处理器执行 AT指令， 控制 MIC基带 电路打开相应的副麦克风以采集外界声音信号并产生第二音频信号。 步骤 S13， 所述各第二终端分别将接收的第二音频信号发送至所述第一终端。 在本实施例中，第二终端的处理器将采集的第二音频信号经过 A/D转换和编码后 通过第二无线通信模块发送至第一终端。 步骤 S20， 按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的 待处理音频信号； 在本实施例中， 预设的规则可以根据实际需要进行选择， 只要能从多个第二音频 信号中确定其中一第二音频信号为待处理音频信号， 且该待处理音频信号能获得较好 的消噪效果即可。 步骤 S30， 对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音 频信号， 输出所述第三音频信号。 在本实施例中， 通过对第一音频信号和待处理音频信号进行差分处理、 数模混合 处理以及 DSP等消噪处理后得到经过消噪的良好的语音信号， 即为第三音频信号。 本实施例提出的音频信号的消噪方法， 在主麦克风产生第一音频信号时， 获取与 所述主麦克风所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号， 并 按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处理音频信 号， 再对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音频信号， 最终输出经过消噪处理的第三音频信号。 通过在多个副麦克风产生的第二音频信号中 按照预设的规则进行选择， 并确定较佳的第二音频信号设定为待处理音频信号， 利用 该待处理音频信号与第一音频信号进行消噪处理， 使得能够更好的消除噪声， 提高了 对音频信号的消噪效果。
应当说明的是， 在输出上述第三音频信号的过程中或之后， 确定待处理音频信号 的方式有以下两种实施例： 第一实施例如下： 主麦克风仍然实时产生第一音频信号， 并获取与所述主麦克风 所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号； 按照预设的规则 从各个所述第二音频信号中选择待处理音频信号。 即待处理音频信号所对应的副麦克 风并不是唯一的， 而是实时的根据预设的规则进行选择的。 也就是说实时的根据预设 规则重新确定新的待处理音频信号。 用户在通话过程中， 由于位置的变化以及环境噪 声的变化， 可能导致之前所选择的待处理音频信号已不是用于进行消噪处理的最佳第 二音频信号， 因此，本实施例通过实时的根据预设规则重新确定新的待处理音频信号， 即不断的更换待处理音频信号以保证当前使用的第二音频信号始终为最佳待处理音频 信号， 从而进一步提高了对音频信号的消噪效果。 第二实施例如图 3所述， 步骤 S30之后还包括： 步骤 S40， 继续实时或定时获取所述待处理音频信号所对应的副麦克风产生的第 二音频信号； 步骤 S50， 对主麦克风当前产生的第一音频信号与所述待处理音频信号所对应的 副麦克风产生的第二音频信号进行消噪处理得到第三音频信号， 输出所述第三音频信 号。 本实施例中， 当输出第三音频信号之后， 仍然利用之前确定为待处理音频信号所 对应的副麦克风输出的第二音频信号进行消噪处理； 或者预设一预置时间， 在该预置 时间内仍然利用之前确定为待处理音频信号所对应的副麦克风输出的第二音频信号进 行消噪处理， 并在该预置时间之后重新确定新的待处理音频信号。 本实施例提供的消 噪方法效率较高。 进一步地， 在所述步骤 S30之后还执行以下步骤： 关闭未被确定为待处理音频信 号的其他各第二音频信号所对应的副麦克风。 本实施例中， 当确定完成待处理音频信号后， 即确定了与该待处理音频信号对应 的副麦克风， 将该副麦克风产生的第二音频信号用于后续的消噪处理。 确定完成后， 关闭除上述副麦克风以外的其他副麦克风， 既能节约电能， 又能延长其他麦克风的使 用寿命。
具体地， 为了进一步提高对音频信号的消噪效果， 参照图 4， 图 4为图 1中步骤 S20的一实施例的流程示意图， 步骤 S20包括： 步骤 S21， 计算获得所述第一音频信号与各个第二音频信号之间的信噪比差值； 本实施例中， 信噪比即为最大不失真语音信号强度与噪音信号强度之间的比值。 步骤 S22， 确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第二 音频信号设定为所述待处理音频信号。 步骤 S22的具体实施方式可以根据实际需要进行选择， 例如， 上述预设范围可以 为一数值区间， 例如可以为 3dB至 9dB， 然后查找位于该区间内的信噪比差值所对应 的第二音频信号， 当查找的第二音频信号为一个时， 则直接接该第二音频信号作为待 处理音频信号； 当查找的第二音频信号为多个时， 则可以任选其中一个第二音频信号 作为待处理音频信号， 也可以再设置一阈值， 例如将该阈值设为 6dB， 在已查找到的 多个第二音频信号中选择一最接近 6dB的第二音频信号作为待处理音频信号。 上述预 设范围还可以采用其他方式设置。 除以上实施方式外， 优选地， 参照图 5， 步骤 S22包括：
5221 , 获取所述信噪比差值大于或等于第一预设阈值的第二音频信号； 本实施例中， 第一预设阈值可以根据实际需要进行选择， 例如， 本实施例中设为 6dB， 首先将所有与第一音频信号之间的信噪比差值大于或等于 6dB的第二音频信号 筛选出来。
5222, 当获取的第二音频信号为一个时， 将获取的第二音频信号设定为所述待处 理音频信号； 当上述已筛选出来的第二音频信号为一个时， 则直接将该第二音频信号设定为所 述待处理音频信号。
5223 , 当获取的第二音频信号为多个时， 将获取的第二音频信中信噪比差值最小 的第二音频信号设定为所述待处理音频信号。 当上述已筛选出来的第二音频信号为多个时， 则将最接近 6dB的第二音频信号设 定为所述待处理音频信号。 此外，步骤 S22还可以具体为： 当所述各信噪比差值均小于所述第一预设阈值时， 将所述信噪比差值最大的第二音频信号设定为所述待处理音频信号。 即当所有的第二音频信号与第一音频信号之间的信噪比差值均小于 6dB时， 则将 与所述第一音频信号之间的信噪比差值最大的第二音频信号作为待处理音频信号。
参照图 6， 图 6为本发明音频信号的消噪系统第一实施例的功能模块示意图。 需要强调的是， 对本领域的技术人员来说， 图 6所示功能模块图仅仅是一个较佳 实施例的示例图， 本领域的技术人员围绕图 6所示的图库中图片的比对系统的功能模 块， 可轻易进行新的功能模块的补充； 各功能模块的名称是自定义名称， 仅用于辅助 理解该图库中图片的比对系统的各个程序功能块， 不用于限定本发明的技术方案， 本 发明技术方案的核心是， 各自定义名称的功能模块所要达成的功能。 本实施例提出一种音频信号的消噪系统， 包括： 获取模块 10， 设置为在主麦克风产生第一音频信号时， 获取与所述主麦克风所在 的第一终端进行通信的其它各个副麦克风产生的第二音频信号； 本实施例中， 上述主麦克风为设于第一终端的较靠近音源位置的麦克风， 主麦克 风能够接收大量的语音信号和环境噪声； 上述副麦克风为设于第二终端或第一终端上 的麦克风， 且副麦克风离音源较远， 能够接收环境噪声或少量的语音信号 （或者接收 不到语音信号）。上述副麦克风的数量可以根据实际需要进行选择， 可以为多个， 第二 终端的数量也可以根据实际需要进行设置， 每个第二终端上设置的副麦克风的数量也 可以根据实际需要进行设置。例如， 可以每个第二终端上均设置一个副麦克风， 当然， 也可以另外在第一终端上设置一个副麦克风； 此外， 上述所有副麦克风也可以均设置 在第一终端上， 此时第一终端应足够大。 上述第一终端和第二终端可以为手机、 智能 可穿戴设备、 智能终端等， 具体可以根据实际需要进行选择， 在此不作限定。 上述音 频信号的消噪方法可以用于手机通话消噪、 话筒消噪等等。 本实施例以用于手机通话消噪为例进行说明。 上述第一终端设为手机， 且第一终 端上分别设置一主麦克风和一副麦克风； 上述第二终端设为智能可穿戴设备， 且第二 终端的数量为两个， 每一第二终端上均设置一个副麦克风。 在本实施例中，获取模块 10获取与所述主麦克风所在的终端进行通信的其它各个 副麦克风产生的第二音频信号的具体实施例如图 7所示， 获取模块 10包括： 第一发送单元 11， 在主麦克风产生第一音频信号时， 所述主麦克风所在的第一终 端发送控制信号至其他各个副麦克风所在的第二终端； 在本实施例中， 第一终端包括处理器和第一无线通信模块， 第二终端包括第二无 线通信模块， 第一终端和第二终端通过第一无线通信模块和第二无线通信模块进行通 信。 本实施例提供的第一无线通信模块包括蓝牙芯片和天线， 第二无线通信模块也包 括蓝牙芯片和天线。 在其他实施例中， 第一无线通信模块和第二无线通信模块也可以 为 WIFI模块。 用户在使用第一终端拨出或接通电话时， 第一终端的处理器发出命令信号控制第 一终端基带电路中的 MIC通路打开第一终端上的主麦克风和副麦克风，并通过第一无 线通信模块发送控制信号至第二终端的第二无线通信模块。 各第二终端分别与第一终 端建立蓝牙配对， 第一终端的处理器将内置的控制命令进行编码发送给第一终端的蓝 牙芯片， 该蓝牙芯片对所述控制命令按照蓝牙 AT指令集合进行编码后， 经第一终端 的天线发送给各第二终端的第二无线通信模块。 开启单元 12， 所述各第二终端接收到所述控制信号后， 分别打开各自的副麦克风 以接收第二音频信号； 在本实施例中， 各第二终端通过其天线接收到上述控制信号后， 各第二终端的蓝 牙芯片将蓝牙射频信号进行射频解码后进行基带信号解码， 蓝牙 AT指令转换为通信 标准 AT指令， 并发送给第二终端的处理器， 该处理器执行 AT指令， 控制 MIC基带 电路打开相应的副麦克风以采集第二音频信号。 第二发送单元 13， 所述各第二终端分别将接收的第二音频信号发送至所述第一终
在本实施例中，第二终端的处理器将采集的第二音频信号经过 A/D转换和编码后 通过第二无线通信模块发送至第一终端。 选择模块 20， 设置为按照预设的规则从各个所述第二音频信号中确定用于进行消 噪处理的待处理音频信号； 在本实施例中， 预设的规则可以根据实际需要进行选择， 只要能从多个第二音频 信号中确定其中一第二音频信号为待处理音频信号， 且该待处理音频信号能获得较好 的消噪效果即可。 处理模块 30， 对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三 音频信号； 在本实施例中， 通过对第一音频信号和待处理音频信号进行差分处理、 数模混合 处理以及 DSP等消噪处理后得到经过消噪的良好的语音信号， 即为第三音频信号。 输出模块 40， 设置为输出所述第三音频信号。 本实施例提出的音频信号的消噪系统， 在主麦克风产生第一音频信号时， 获取与 所述主麦克风所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号， 并 按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处理音频信 号， 再对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音频信号， 最终输出经过消噪处理的第三音频信号。 通过在多个副麦克风产生的第二音频信号中 按照预设的规则进行选择， 并确定较佳的第二音频信号设定为待处理音频信号， 利用 该待处理音频信号与第一音频信号进行消噪处理， 使得能够更好的消除噪声， 提高了 对音频信号的消噪效果。
应当说明的是， 在输出上述第三音频信号的过程中或之后， 确定待处理音频信号 的方式有以下两种实施例： 第一实施例如下： 主麦克风仍然实时产生第一音频信号，获取模块 10获取与所述 主麦克风所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号； 选择模 块 20按照预设的规则从各个所述第二音频信号中选择待处理音频信号。即待处理音频 信号所对应的副麦克风并不是唯一的， 而是实时的根据预设的规则进行选择的。 也就 是说实时的根据预设规则重新确定新的待处理音频信号。 用户在通话过程中， 由于位 置的变化以及环境噪声的变化， 可能导致之前所选择的待处理音频信号已不是用于进 行消噪处理的最佳第二音频信号， 因此， 本实施例通过实时的根据预设规则重新确定 新的待处理音频信号， 即不断的更换待处理音频信号以保证当前使用的第二音频信号 始终为最佳待处理音频信号， 从而进一步提高了对音频信号的消噪效果。 第二实施例如下： 获取模块 10 还设置为继续实时或定时获取所述待处理音频信号所对应的副麦克 风产生的第二音频信号； 处理模块 30 还设置为对主麦克风当前产生的第一音频信号与所述待处理音频信 号所对应的副麦克风产生的第二音频信号进行消噪处理得到第三音频信号， 输出所述 第三音频信号。 本实施例中， 当输出第三音频信号之后， 仍然利用之前确定为待处理音频信号所 对应的副麦克风输出的第二音频信号进行消噪处理； 或者预设一预置时间， 在该预置 时间内仍然利用之前确定为待处理音频信号所对应的副麦克风输出的第二音频信号进 行消噪处理， 并在该预置时间之后重新确定新的待处理音频信号。 本实施例提供的消 噪方法效率较高。 进一步地， 该系统还包括关闭模块， 该关闭模块设置为关闭未被确定为待处理音 频信号的其他各第二音频信号所对应的副麦克风。 本实施例中， 当确定完成待处理音频信号后， 即确定了与该待处理音频信号对应 的副麦克风， 将该副麦克风产生的第二音频信号用于后续的消噪处理。 确定完成后， 关闭除上述副麦克风以外的其他副麦克风， 既能节约电能， 又能延长其他麦克风的使 用寿命。
具体地， 为了进一步提高对音频信号的消噪效果， 参照图 8， 图 8为本发明音频 信号的消噪系统的选择模块一实施例的功能模块示意图， 所述选择模块 20包括： 计算单元 21， 设置为分别确定所述第一音频信号与各个第二音频信号之间的信噪 比差值； 本实施例中， 信噪比即为最大不失真语音信号强度与噪音信号强度之间的比值。 确定单元 22， 设置为确定与所述第一音频信号之间的信噪比差值介于预设范围内 的第二音频信号， 将确定的第二音频信号作为待处理音频信号。 确定单元 22的具体实施方式可以根据实际需要进行选择，例如， 上述预设范围可 以为一数值区间， 例如可以为 3dB至 9dB， 然后查找位于该区间内的信噪比差值所对 应的第二音频信号， 当查找的第二音频信号为一个时， 则直接接该第二音频信号作为 待处理音频信号； 当查找的第二音频信号为多个时， 则可以任选其中一个第二音频信 号作为待处理音频信号， 也可以再设置一阈值， 例如将该阈值设为 6dB， 在已查找到 的多个第二音频信号中选择一最接近 6dB的第二音频信号作为待处理音频信号。 上述 预设范围还可以采用其他方式设置。 除以上实施方式外， 优选地， 参照图 9， 确定单元 S22包括： 查找子单元 221， 设置为获取所述信噪比差值大于或等于第一预设阈值的第二音 频信号； 本实施例中， 第一预设阈值可以根据实际需要进行选择， 例如， 本实施例中设为 6dB， 首先将所有与第一音频信号之间的信噪比差值大于或等于 6dB的第二音频信号 筛选出来。 确定子单元 222， 设置为当获取的第二音频信号为一个时， 将获取的第二音频信 号设定为所述待处理音频信号； 以及当获取的第二音频信号为多个时， 将获取的第二 音频信中信噪比差值最小的第二音频信号设定为所述待处理音频信号。 本实施例中， 当上述已筛选出来的第二音频信号为一个时， 则直接将该第二音频 信号设定为所述待处理音频信号。 当上述已筛选出来的第二音频信号为多个时， 则将 最接近 6dB的第二音频信号设定为所述待处理音频信号。 此外，确定单元 22还设置为当所述各信噪比差值均小于所述第一预设阈值时，将 所述信噪比差值最大的第二音频信号设定为所述待处理音频信号。 即当所有的第二音频信号与第一音频信号之间的信噪比差值均小于 6dB时， 则将 与所述第一音频信号之间的信噪比差值最大的第二音频信号作为待处理音频信号。
以上仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用本发 明说明书及附图内容所作的等效结构或等效流程变换， 或直接或间接运用在其他相关 的技术领域， 均同理包括在本发明的专利保护范围内。 工业实用性 本发明实施例提供的技术方案可以应用于移动终端中， 具体的可以应用于移动终 端以消除环境的噪声， 提高对音频信号的消噪效果。

Claims

权 利 要 求 书 、 一种音频信号的消噪方法， 包括： 在主麦克风产生第一音频信号时， 获取与所述主麦克风所在的第一终端进 行通信的其它各个副麦克风产生的第二音频信号；
按照预设的规则从各个所述第二音频信号中确定用于进行消噪处理的待处 理音频信号； 对所述第一音频信号与所述待处理音频信号进行消噪处理得到第三音频信 号， 输出所述第三音频信号。 、 如权利要求 1所述的音频信号的消噪方法， 其中， 所述按照预设的规则从各个 所述第二音频信号中确定用于进行消噪处理的待处理音频信号的步骤包括： 计算获得所述第一音频信号与各个第二音频信号之间的信噪比差值； 确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第二音频 信号设定为所述待处理音频信号。 、 如权利要求 2所述的音频信号的消噪方法， 其中， 所述确定所述信噪比差值介 于预设范围内的第二音频信号， 将确定的第二音频信号设定为所述待处理音频 信号的步骤包括：
获取所述信噪比差值大于或等于第一预设阈值的第二音频信号； 当获取的第二音频信号为一个时， 将获取的第二音频信号设定为所述待处 理音频信号； 当获取的第二音频信号为多个时， 将获取的第二音频信中信噪比差值最小 的第二音频信号设定为所述待处理音频信号。 、 如权利要求 3所述的音频信号的消噪方法， 其中， 所述确定所述信噪比差值介 于预设范围内的第二咅频信号， 将确定的第二咅频信号设定为所述待处理咅频 信号的步骤还包括：
当所述各信噪比差值均小于所述第一预设阈值时， 将所述信噪比差值最大 的第二音频信号设定为所述待处理音频信号。 、 如权利要求 1至 4任一项所述的音频信号的消噪方法， 其中， 所述按照预设的 规则从各个所述第二音频信号中确定用于进行消噪处理的待处理音频信号的步 骤之后还包括： 继续实时或定时获取所述待处理音频信号所对应的副麦克风产生的第二音 频信号；
对主麦克风当前产生的第一音频信号与所述待处理音频信号所对应的副麦 克风产生的第二音频信号进行消噪处理得到第三音频信号， 输出所述第三音频 信号。 、 一种音频信号的消噪系统， 包括： 获取模块， 设置为在主麦克风产生第一音频信号时， 获取与所述主麦克风 所在的第一终端进行通信的其它各个副麦克风产生的第二音频信号； 选择模块， 设置为按照预设的规则从各个所述第二音频信号中确定用于进 行消噪处理的选择待处理音频信号；
处理模块， 设置为对所述第一音频信号与所述待处理音频信号进行消噪处 理得到第三音频信号； 输出模块， 设置为输出所述第三音频信号。 、 如权利要求 6所述的音频信号的消噪系统， 其中， 所述选择模块包括： 计算单元， 设置为计算获得所述第一音频信号与各个第二音频信号之间的 信噪比差值；
确定单元， 设置为确定所述信噪比差值介于预设范围内的第二音频信号， 将确定的第二音频信号设定为所述待处理音频信号。 、 如权利要求 7所述的音频信号的消噪系统， 其中， 所述确定单元包括： 查找子单元， 设置为获取所述信噪比差值大于或等于第一预设阈值的第二 音频信号；
确定子单元， 设置为当获取的第二音频信号为一个时， 将获取的第二音频 信号设定为所述待处理音频信号； 以及当获取的第二音频信号为多个时， 将获 取的第二音频信中信噪比差值最小的第二音频信号设定为所述待处理音频信 号。 、 如权利要求 8所述的音频信号的消噪系统， 其中， 所述确定子单元还设置为当 所述各信噪比差值均小于所述第一预设阈值时， 将所述信噪比差值最大的第二 音频信号设定为所述待处理音频信号。 0、 如权利要求 6至 9任一项所述的音频信号的消噪系统， 其中， 所述获取模块还设置为在所述输出模块输出第三音频信号之后， 继续实时 或定时获取所述待处理音频信号所对应的副麦克风产生的第二音频信号； 所述处理模块还设置为对主麦克风当前产生的第一音频信号与所述获取模 块获取到的第二音频信号进行消噪处理得到第三音频信号。
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