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Audio noise reduction method and device

An audio noise reduction and noise reduction technology, applied in the field of audio noise reduction methods and devices, can solve problems such as earphone whistling, and achieve the effect of avoiding whistling

Active Publication Date: 2017-11-24
GEER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The wearer will press the earphone to a certain extent when wearing the earphone, which will introduce a very large disturbance to the entire earphone system, and the introduced disturbance may form howling in the earphone

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  • Audio noise reduction method and device
  • Audio noise reduction method and device

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Embodiment Construction

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the conte...

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Abstract

An embodiment of the invention provides an audio noise reduction method and device. The method comprises the following steps: obtaining an audio signal to be processed and carrying out filtering processing on the audio signal to generate a noise reduction control signal same in value and opposite in phase with the audio signal; when detecting that signal amplitude at some time point of the noise reduction control signal meets an amplitude limit starting threshold value, starting an amplitude limiter, and carrying out attenuation processing on the signal amplitude corresponding to a time point after the time point, wherein since one condition under which howling occurs is that the signal amplitude reaches a certain value, by reducing the signal amplitude corresponding to the time point after the first time point, the howling occurrence condition can be damaged, and occurrence of the howling can be prevented; and at last, outputting the noise reduction control signal obtained after attenuation processing, and carrying out superposition on the noise reduction control signal obtained after attenuation processing and the noise signal to realize noise reduction of the audio signal to be processed.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to an audio noise reduction method and device. Background technique [0002] Compared with audio, earphones have many advantages, such as good portability, high privacy, and less impact on the surrounding crowd. [0003] The wearer will press the earphone to a certain extent when wearing the earphone, which will introduce a very large disturbance to the entire earphone system, and the introduced disturbance may form howling in the earphone. Once howling occurs in the earphone, it may cause damage to the wearer's hearing. Therefore, it is necessary to avoid the generation of howling. Contents of the invention [0004] In view of this, an embodiment of the present invention provides an audio noise reduction method and device, by limiting the input control signal, so that the control signal cannot meet the conditions for howling to occur, thereby preventing the ear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0316G10L21/0208
CPCG10L21/0208G10L21/0316
Inventor 于锴华洋王若蕙
Owner GEER TECH CO LTD
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