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Single microphone voice noise reduction method and device

A voice noise reduction and microphone technology, applied in the field of communication noise reduction, can solve the problems of increasing the cost of mobile communication equipment, increasing the design difficulty of miniaturized mobile communication equipment, etc., so as to reduce the cost and design difficulty, and solve the effect of noise interference.

Inactive Publication Date: 2014-02-19
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] It can be seen that in the prior art, in order to filter out noise, the mobile communication device must have two microphones, one of which is used to collect background noise, and the other microphone is used to collect the voice input by the user, which not only increases the The cost also increases the design difficulty of miniaturized mobile communication equipment

Method used

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specific Embodiment approach

[0017] A specific embodiment of a single-microphone speech noise reduction method of the present invention, comprising:

[0018] Step A: Obtain the reference feature parameter T1 of the user's voice signal in a noise-free environment before the call; this step can be realized by the user recording his own voice in a quiet environment, and then the system automatically extracts the feature parameters in the voice. During the recording process, the system can also detect the ambient volume to help users obtain a noise-free input environment. Specifically, extracting feature parameters of speech belongs to common knowledge in this field, and will not be repeated here.

[0019] Step B: When the call starts, filter out the voice signals that are obviously different from the reference characteristic parameter T1 among the voice signals to be sent. At the beginning of the call, the user inputs the voice. Since there is only one microphone, the system has not collected the noise sign...

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Abstract

The invention relates to the technical field of communication noise reduction, in particular to a single microphone voice noise reduction method. According to the method, time slots with no user voice input during a conversation process are identified, and voice signals collected by a microphone during the time slots with no user voice input are all background noise signals, so that the time slots are used for obtaining the background noise signals, then noise filtering processing is conducted on the voice signals during the conversation process according to the background noise signals, and therefore the noise disturbance problem can be solved by only one microphone, and the cost and design difficulty of mobile communication equipment are reduced.

Description

technical field [0001] The invention relates to the technical field of communication noise reduction, in particular to a single-microphone voice noise reduction method. The method is accomplished by establishing a functional module framework and controlling the computer system by computer program instructions. Background technique [0002] With the development of technology, mobile communication devices have been greatly popularized. Background noise inevitably exists during a call using a mobile communication device. The existence of the background noise seriously affects the quality of the call, and the background noise is also different due to different call environments. In this regard, in order to improve call quality, the current industry mainly adopts dual microphones for noise filtering. For example, the patent document with the patent number: CN 103219011A discloses a noise reduction method for solving the problem of noise interference during a communication termi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L25/78
Inventor 张伟正
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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