System and method for reducing environmental noise as well as device applying system

一种环境噪音、噪音的技术，应用在降低环境噪音的系统领域，能够解决夹杂较多、语音失真、影响降噪的功能等问题，达到抑制环境噪音、提升性能、减少噪音的效果

Active Publication Date: 2012-03-14
C-MEDIA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] 3. Because it is a fixed beamforming technology, the voice will be mixed with more noise, which will affect the noise reduction function; if you want to further process the noise reduction, it may cause voice distortion.

Method used

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  • System and method for reducing environmental noise as well as device applying system
  • System and method for reducing environmental noise as well as device applying system
  • System and method for reducing environmental noise as well as device applying system

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Embodiment Construction

[0055] According to the embodiment of the present invention, in one embodiment, it is mainly applied in a radio module with two or more input terminals, wherein the input terminals can be two or more microphone modules, and the radio module includes these two The purpose of the microphone array formed by two microphone modules is to collect sounds from two different locations, through software or hardware implementation, to estimate the background noise, and then obtain better quality audio or voice signals.

[0056] The technology implemented according to the present invention has at least several advantages:

[0057] 1. It can effectively suppress the environmental noise during the call, and improve the clarity and comfort of the audio or voice communication process, without being affected by too much environmental noise;

[0058] 2. The system for reducing environmental noise proposed by the present invention can perform instant signal calibration (calibration), and through...

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Abstract

The invention provides a system and a method for reducing environmental noise as well as a device applying the system, and is particularly applied to a stereo radio module with at least two input terminals. The method comprises the following steps: respectively receiving audio frequency including a main audio frequency part and most part of the environmental noise; executing signal calibration in the system so as to reduce the difference between the input terminals; respectively obtaining an environmental noise part with less main audio frequency and a main audio frequency part with less environmental noise by virtue of adaptive beam forming and speech extraction technologies; after frequency domain transformation, estimating the environmental noise received by the system by virtue of a nonlinear noise suppression technology; obtaining a gain; denoising by means of the gain; and finally generating the continuously output audio frequency through carrying out domain transformation again. The system and the method as well as the device applying the same have the beneficial effects of effectively suppressing the environmental noise during call, improving the intelligibility and comfortability during the audio or speech communication process, preventing the call from being affected by too much noise, ensuring instant signal calibration, and maximally reducing the noise included in the audio frequency.

Description

technical field [0001] The present invention relates to a system, method and application device for reducing environmental noise, in particular to a system applied to a microphone array to provide better call quality through a real-time noise suppression program and an application device thereof. Background technique [0002] In order to solve the trouble caused by the environmental noise during the call, the known technology proposes the technology of reducing the environmental noise by using a dual microphone array (microphone array). A secondary microphone that receives ambient noise. The information received by the two microphones can effectively eliminate ambient noise and improve call quality through calculation. [0003] Can refer to figure 1 A communication device provided with two microphones is shown in the known art, such as US Patent Publication No. 6,549,586. The communication device shown therein has two microphones, namely a first microphone 101 far away fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02
CPCG10L21/0208G10L2021/02165
Inventor 李岳鹏邱锋海高华
Owner C-MEDIA ELECTRONICS INC
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