Hands-free call terminal and its voice signal processing method and device

A voice signal processing, hands-free calling technology, applied in the field of communications, can solve problems such as large echo interference, and achieve the effect of eliminating echo interference

Active Publication Date: 2019-11-01
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the dual microphone array is placed horizontally, there is a problem of large echo interference

Method used

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  • Hands-free call terminal and its voice signal processing method and device
  • Hands-free call terminal and its voice signal processing method and device
  • Hands-free call terminal and its voice signal processing method and device

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Embodiment Construction

[0035] In an existing communication terminal, the two built-in microphones are usually arranged vertically, one of which is placed at the bottom of the communication terminal, and the other microphone is placed at the top of the communication terminal. When the user uses the communication terminal, the placement of the above microphone can provide a better noise reduction effect.

[0036] However, due to some characteristics of hands-free calls, this way of vertically arranging the microphones makes the microphone array produce a strong near-field effect, and the relative amplitude of the voice signals received by the two microphones has a large difference, so the array cannot be used effectively signal processing. At the same time, when the microphones arranged vertically are receiving voice signals, it is difficult for the characteristics of the voice signals received by the two microphones to be consistent, so it is difficult to obtain dual-microphone signals with good cons...

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Abstract

The invention provides a hand-free call terminal and a voice signal processing method and device thereof. The method comprises the steps that a first voice signal, a second voice signal and a third voice signal are acquired when the voice signal is detected; adaptive filtering is performed on the first voice signal and the second voice signal with the voice signal outputted by a loudspeaker acting as a reference signal so as to obtain a first filtering signal and a second filtering signal; adaptive filtering is performed on the first filtering signal and the second filtering signal with the third voice signal acting as the reference signal so as to obtain a third filtering signal and a fourth filtering signal; array signal processing is performed on the third filtering signal and the fourth filtering signal so as to obtain an integrated signal and a deviation signal; and the deviation signal and the third voice signal are mixed to generate a noise reference signal, and Wiener filtering is performed on the integrated signal by using the noise reference signal. According to the scheme, the echo interference of the call terminal can be reduced and the voice signal quality can be enhanced.

Description

technical field [0001] The invention relates to the communication field, in particular to a hands-free call terminal and a voice signal processing method and device thereof. Background technique [0002] A communication terminal, such as a smart phone, usually has a rectangular shape. In the existing call terminal, there are usually two built-in microphones, and the two microphones are arranged vertically, that is: one of the microphones is used as the main microphone and placed at the bottom of the call terminal; the other microphone is used as an auxiliary microphone and placed at the top of the call terminal . When the user uses the communication terminal, the placement of the above microphone can provide a better noise reduction effect. [0003] However, due to some characteristic habits of hands-free calling, this way of vertically arranging the microphones causes the microphone array to produce a strong near-field effect, and the array signal processing cannot be eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/60H04M9/08
CPCH04M1/6041H04M9/08
Inventor 吴晟蒋斌袁野林福辉雍雅琴纪伟
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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