Device and method for eliminating environmental noise

A technology for environmental noise and noise suppression, which is applied to interconnection devices, two-way sound reinforcement telephone systems, voice analysis, etc., can solve the problems of not involving noise reduction and the inability for users to hear the voice clearly, and achieve good user experience and good calls quality, noise suppression effect

Inactive Publication Date: 2010-03-10
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above methods all perform noise reduction processing in the uplink direction of the communication process, and do not invo

Method used

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  • Device and method for eliminating environmental noise
  • Device and method for eliminating environmental noise
  • Device and method for eliminating environmental noise

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Embodiment Construction

[0032] The basic idea of ​​the present invention is: set more than one microphone at different positions of the mobile communication terminal to receive uplink signals respectively, and when there is an uplink voice signal to be transmitted, the uplink noise suppression module can effectively eliminate the uplink environmental noise signal; When the downlink voice signal is transmitted, the extracted environmental noise signal is converted into a reversed environmental noise signal, and then the reversed noise signal is superimposed on the downlink signal and then output. During the process of inputting the output signal to the human ear, the ambient noise around the human ear The signal and the reverse environmental noise signal in the output signal cancel each other out, so that the human ear only receives the downlink signal, effectively eliminating the influence of the environmental noise on the local listening effect.

[0033] A device for eliminating environmental noise p...

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Abstract

The invention discloses a device and a method for eliminating environmental noise. The method comprises the following steps: respectively mounting two paths of microphones in different positions of amobile communication terminal and respectively receiving uplink signals; when an uplink voice signal is transmitted, effectively eliminating the uplink environmental noise signal by an uplink noise inhibiting module so that the counterpart can hear a local part clearly; when a downlink voice signal is transmitted, converting the extracted environmental noise signal into a reverse environmental noise signal; overlying the reverse environmental noise signal and the downlink signal and then outputting; in the process of outputting an output signal to the human ears, mutually canceling the environmental noise signal at the periphery of the human ears and the reverse environmental noise signal in the output signal so that the human ears only receive the downlink signal; and effectively eliminating the influence of the environmental noise on the hearing effect of the local part, thereby ensuring that the local part can hear the counterpart clearly.

Description

technical field [0001] The invention relates to noise elimination technology in mobile communication, in particular to a device and method for eliminating environmental noise in a mobile communication terminal. Background technique [0002] During a call using a mobile terminal, the user may sometimes make a call in a noisy environment, such as on a noisy street, in a running subway, or in a noisy restaurant. In this case, in order for the other party to hear their own voice clearly, the user must either find a quiet place to talk again, or amplify the voice of the speech. the sound of. Therefore, it is particularly important to effectively eliminate the environmental noise in the mobile communication process. [0003] Generally, noise can be divided into: steady-state noise and unsteady-state noise. It is relatively easy to eliminate the steady-state noise whose noise amplitude characteristics change little over time, but it is often difficult to eliminate the unsteady-st...

Claims

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Application Information

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IPC IPC(8): G10L21/02H04M9/08G10L21/0208
CPCH04M9/082G10L21/0208
Inventor 邹健
Owner ZTE CORP
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