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

A voice signal processing and hands-free call technology, applied in the field of communication, can solve problems such as large echo interference, and achieve the effects of reducing noise interference, high consistency, and reducing echo interference

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

AI Technical Summary

Problems solved by technology

[0003] However, the placement of the above-mentioned microphones has a large echo interference when the call terminal is used for hands-free calls

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

[0036] In the prior art, there are usually two built-in microphones in the communication terminal, one of which is used as a main microphone and placed at the bottom of the communication terminal; the other microphone is used as an auxiliary microphone and 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. However, with the placement of the above-mentioned microphones, when a hands-free call is made on the calling terminal, the sound output by the speaker will be received by the two microphones, and there is a large echo interference.

[0037] In the embodiment of the present invention, adaptive filtering is first performed on the first voice signal through the voice signal output from the speaker, and the linear part of the voice signal output from the speaker in the first voice signal is filtered out. After the first filtered signal is obtained, ada...

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Abstract

The invention provides a hand-free call terminal and a voice signal processing method and device thereof. The processing method comprises the steps that the signal intensity value D1 of a first voice signal received by a first microphone and the signal intensity value D2 of a second voice signal received by a second microphone are calculated when the voice signal is detected; the signal intensity value D1 of the first voice signal received by the first microphone and the signal intensity value D2 of the second voice signal received by the second microphone are calculated when the voice signal is detected; the distance between the first microphone and a loudspeaker is greater than the distance between the second microphone and the loudspeaker; adaptive filtering is performed on a first filtering signal with the second voice signal acting as a reference signal so as to obtain a second filtering signal; and Wiener filtering is performed on the second filtering signal by using the second voice signal and the obtained filtering result acts as a voice output signal. The echo interference of the call terminal can be reduced by the scheme.

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 an existing communication terminal, there are usually two built-in microphones, one of which is used as a main microphone and placed at the bottom of the communication terminal; the other microphone is used as an auxiliary microphone and 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. [0003] However, the placement of the above-mentioned microphones causes relatively large echo interference when the calling terminal performs a hands-free call. Contents of the invention [0004] The technical problem solved by the invention is how to reduce the echo interfere...

Claims

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Application Information

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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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