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Method and mobile terminal for reducing noise by double microphones (MICs)

A mobile terminal and noise cancellation technology, applied in the field of signal processing, can solve the problems of inaudible speech and inability of the other party to hear

Active Publication Date: 2012-10-17
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Abstract
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Problems solved by technology

And once this basis is broken, that is, the distance between the human mouth and the two MICs is the same, then the signals of the same intensity will be generated on the two MICs, so that when the two MICs are subtracted, the voice of the user will also be like Background noise is also eliminated or greatly attenuated, resulting in inaudible or inaudible speech on the other end of the call

Method used

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  • Method and mobile terminal for reducing noise by double microphones (MICs)
  • Method and mobile terminal for reducing noise by double microphones (MICs)
  • Method and mobile terminal for reducing noise by double microphones (MICs)

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Embodiment Construction

[0026] An embodiment of the present invention provides a dual MIC noise reduction method and a mobile terminal. When the mobile terminal is talking, if it is determined that no contact event occurs at the set point on the touch area, and / or it is determined that the distance between the long side of the mobile terminal and the gravity line If the angle exceeds the set angle range, it can be determined that the user's holding posture is incorrect, and then by adjusting the call audio parameters of the MIC of the mobile terminal, a better dual-MIC noise reduction effect can be obtained.

[0027] Because different users have different habits of holding mobile terminals, and even the same person may have different holding methods during a long conversation. Figure 2a with Figure 2b The two holding postures listed in the above are relatively common in daily life. Figure 2a When the mobile phone is held in the middle, the mobile phone is not close to the cheek; Figure 2b Altho...

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Abstract

The invention discloses a method and a mobile terminal for reducing noise by double microphones (MICs), and relates to a communication technology. When the mobile terminal is in a call state, if contact events do not occur at a setting point in a touch area, and / or the angle between the long edge of the mobile terminal and a gravity line exceeds a set angle range, the incorrect holding gesture of a user can be determined, and a good double-MIC noise reduction effect can be achieved by regulating call audio parameters of the MICs of the mobile terminal.

Description

technical field [0001] The invention relates to signal processing technology, in particular to a double MIC noise reduction method and a mobile terminal. Background technique [0002] Multi-MIC (microphone) noise cancellation technology has been widely used in mobile terminals such as mobile phones, and its principle is as follows: figure 1 shown. Generally, a mobile phone with a noise-cancelling MIC has at least two MICs, one of which is the main MIC, which is closer to the user's mouth; the other is a noise-cancelling MIC, which is located on the back or top of the mobile phone and as far away from the main MIC as possible. [0003] The noise cancellation MIC captures the noise of the surrounding environment, and the mobile terminal performs noise cancellation processing on the audio data received by the main MIC according to the noise data. [0004] Specifically, since the propagation of sound is exponentially attenuated. It can be roughly understood that the sound pre...

Claims

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Application Information

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IPC IPC(8): H04M1/725H04M1/72484
CPCH04M1/19G10L21/0216G10L2021/02165H04M1/72448H04M1/72484
Inventor 王海盈李勇
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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