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Simulation noise reduction system and method for microphone

A technology of noise reduction system and microphone, which is applied in the field of noise reduction processing of mobile phone communication, to achieve the effects of mass promotion and application, good noise suppression effect, and high call quality

Inactive Publication Date: 2010-09-29
北京东微世纪科技有限公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the existing noise elimination circuit, and provide a microphone analog noise reduc

Method used

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  • Simulation noise reduction system and method for microphone
  • Simulation noise reduction system and method for microphone

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] ginseng figure 2 As shown, it is a functional block diagram of the analog noise reduction system 200 of the microphone of the present invention, which is connected to the first microphone 101 and the second microphone 102 respectively, and the first microphone 101 picks up the audio signal (Audio Signal) in the real environment, and the Equipment such as a mobile phone is placed in a position close to the sound of the human body; what the second microphone 102 picks up is a noise signal (Noise Signal) in the real environment, and is placed in a position that can fully absorb environmental noise in the mobile phone; the simulation of the microphone The noise reduction system 200 includes a first low-noise preamplifier 211 for amplifying and impedance transforming the audio signal transmitted by the first microphone 101, and a second low-noise preamplifier 211 ...

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Abstract

The invention relates to the field of noise reduction processing of mobile phone communication, in particular to a simulation noise reduction system and a simulation noise reduction method which are suitable for a microphone of a mobile phone device. An audio signal and a noise signal are acquired through double microphones and processed respectively; the noise signal is eliminated by using the interference principle of sound waves; and a high-frequency signal is eliminated by using a low-pass filter. The noise reduction system effectively eliminates linear noise, nonlinear noise and the high-efficiency signal, thereby achieving high conservation quality and good noise restraining effect. The system does not need installing a digital signal processor (DSP) algorithm, so that the cost and the complexity of the system are reduced. The system can be integrated with a chip, so that peripheral system discrete components such as a resistor, a capacitor, an amplifier, an analog to digital converter and the like which are needed by a conventional circuit are eliminated; the cost and the complexity of the system are reduced; and the system contributes to large-scale popularization and application.

Description

【Technical field】 [0001] The invention relates to the field of noise reduction processing for mobile phone communication, in particular to an analog noise reduction system and method suitable for a microphone of a mobile phone device. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is more important. The microphone of a mobile phone is used as a voice pick-up device for the mobile phone, and its design directly affects the call quality. [0003] However, in the real environment, due to the interference and influence of environmental noise, when the communication device receives the user's voice signal or a specific sound source through the microphone, i...

Claims

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Application Information

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IPC IPC(8): H04M9/08H04M1/19G10L21/02H04R3/00
Inventor 杨勇刚冯劲松司鹏飞林海郭增良徐音瞿鲁坤刘晓峰
Owner 北京东微世纪科技有限公司
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