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Echo cancellation method and device

An echo cancellation and echo technology, which is used in interconnection devices, transducer acoustic response prevention, speech analysis, etc., can solve problems such as voice distortion, and achieve good echo, echo cancellation, and good user experience.

Active Publication Date: 2018-10-26
荣成歌尔科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides an echo cancellation method and device to solve the problem of speech distortion caused by the prior art solution when performing echo cancellation

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  • Echo cancellation method and device

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood, however, that these descriptions are illustrative only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0028] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the invention. The words "a", "an" and "the" used herein shall also include the meanings of "plurality" and "multiple", unless the context clearly indicates otherwise. In addition, ...

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Abstract

The invention discloses an echo cancellation method and device. The method comprises steps of a near-field voice signal and a far-field voice signal; acquiring a frequency domain echo time delay and time domain convolution factors in echo cancellation of the last near-field voice signal; according to the time domain convolution factors, the frequency domain echo time delay and a far field voice signal, carrying out echo cancellation processing on the near-field voice signal in the time domain so as to obtain echo cancellation signals of the time domain and based on the echo cancellation signal, updating time domain convolution factors; acquiring the frequency domain signal of the echo cancellation signal and the frequency domain signal of the far-field voice signal, and according to the frequency domain signal of the echo cancellation signal and the frequency domain signal of the far-field voice signal, acquiring the frequency domain echo time delay and inhibition factors; and according to the inhibition factors, carrying out echo cancellation processing on the echo cancellation signals in the frequency domain so as to obtain signals subjected to echo cancellation. According to theinvention, by use of the method of combining the time domain and the frequency domain, it is ensured that echo can be well cancelled under the condition of quite less voice distortion.

Description

technical field [0001] The invention relates to an echo cancellation method and device. Background technique [0002] The development of smart home appliances represented by smart speakers is becoming more and more mature, and people have higher and higher requirements for their functions, and require products to have better user experience. However, due to the existence of the echo, the far-field voice is included in the near-field voice signal, making it impossible for the user to hear clearly, resulting in poor user experience. For example, if figure 1 As shown, when two people are talking, one of them suddenly has an idea and interrupts the other person who is talking in time to share the sudden idea. In the same way, the intelligence of the smart speaker is also reflected in the ability to interrupt the speaking smart speaker in time when the user has a new idea, so that it can perform corresponding functions according to the user's new idea. In this process, the rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0224G10L21/0232H04R3/02
CPCG10L21/0208G10L21/0224G10L21/0232G10L2021/02082H04R3/02H04M9/082
Inventor 许丹
Owner 荣成歌尔科技有限公司
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