Quick and stable echo eliminating method of intelligent voice interaction equipment

An interactive device and intelligent voice technology, applied in voice analysis, voice recognition, instruments, etc., can solve problems such as interaction confusion, filter divergence, self-noise residual, etc., and achieve the effect of preventing divergence and accelerating convergence speed

Active Publication Date: 2018-09-18
BEIJING UNISOUND INFORMATION TECH
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AI Technical Summary

Problems solved by technology

If the removal is not clean, the voice recognition system will recognize the voice of the device itself, resulting in confusion in the interaction
The self-pronunciation of intelligent voice equipment is usually processed by echo cancellation technology. Its core technology includes adaptive filtering technology, and adaptive filtering technology takes a period of time to converge, and when there is noise other than its o

Method used

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  • Quick and stable echo eliminating method of intelligent voice interaction equipment

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Embodiment Construction

[0038] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0039] figure 1 It is a flow chart of a fast and stable echo cancellation method for an intelligent voice interaction device in an embodiment of the present invention, as shown in figure 1 shown, including steps:

[0040] Step S101, the intelligent voice interactive device plays the preset voice content after starting up for the first time;

[0041] Step S102, the intelligent voice interactive device suppresses the self-noise through the adaptive filtering technology for the preset voice content played after the first power-on, and when the self-noise reaches the preset attenuation value, the filter coefficient at this time is stored , get the stored filter coeffi...

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Abstract

The invention discloses a quick and stable echo eliminating method of intelligent voice interaction equipment. The method comprises the steps of playing a preset voice content by the intelligent voiceinteraction equipment after first starting; suppressing self noise of the played preset voice content after first starting by the intelligent voice interaction equipment through adaptive filtering technology, when the self noise reaches a preset attenuation value, storing a filter coefficient at this time point, and obtaining a stored filter coefficient; in using the intelligent voice interactionequipment, using the stored filter coefficient as an initial coefficient of the adaptive filtering technology; and furthermore in a tracking process, limiting the increment of the filter coefficientto a preset range. According to the quick and stable echo eliminating method, through setting the specific initial coefficient of a filter, convergence speed of the adaptive filter can be increased; and furthermore in the tracking process, the increment range of the filter coefficient is limited, thereby preventing divergence of the adaptive filter.

Description

technical field [0001] The invention relates to the technical field of voice signal processing, in particular to a fast and stable echo cancellation method for an intelligent voice interactive device. Background technique [0002] Smart voice devices usually communicate with people through voice, and the sound from the smart voice device will be transmitted to the system through the microphone. In order to avoid recognizing it as the user's voice, it needs to be removed by echo cancellation technology. If the removal is not clean, the voice recognition system will recognize the voice of the device itself, resulting in confusion in the interaction. The self-pronunciation of intelligent voice equipment is usually processed by echo cancellation technology. Its core technology includes adaptive filtering technology, and adaptive filtering technology takes a period of time to converge, and when there is noise other than its own voice mixed in, it will cause the divergence of the ...

Claims

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0216G10L15/20
CPCG10L15/20G10L21/0208G10L21/0216G10L2021/02082
Inventor 关海欣马金龙
Owner BEIJING UNISOUND INFORMATION TECH
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