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Echo cancellation method and device

A technology of echo cancellation and echo, which is applied in the field of acoustics and can solve problems such as the inability to accurately cancel echo signals

Active Publication Date: 2020-05-15
GOERTEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional echo cancellation method can only fit the linear part of the echo signal, and cannot accurately cancel the echo signal

Method used

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  • Echo cancellation method and device

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Embodiment Construction

[0060] Various exemplary embodiments of the present specification will now be described in detail with reference to the accompanying drawings.

[0061] The following description of at least one exemplary embodiment is merely illustrative in nature, and by no means serves as any limitation on the embodiments of this specification and their application or use.

[0062] It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

[0063]

[0064] see figure 1 Shown, illustrate the echo cancellation system of the embodiment of the present invention:

[0065] The audio device has a speaker 100 and a microphone 200 .

[0066] After the audio signal in to be played is boosted by the smart power amplifier, the first audio signal x is output, and the first audio signal x is input to the speaker 100 for playback. The signal picked up by th...

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Abstract

The invention discloses an echo cancellation method, a voice activation method, an echo cancellation device, an audio device and a computer readable storage medium. The method comprises the followingsteps: a first audio signal and a second audio signal are acquired, the first audio signal is a signal input to a loudspeaker, and the second audio signal is a signal picked up by a microphone; estimating an echo signal caused by the first audio signal through a linear adaptive filtering algorithm to obtain an echo estimation signal; extracting a characteristic parameter of the echo estimation signal as a first characteristic; extracting a characteristic parameter of the error signal as a second characteristic; inputting the first feature and the second feature into a pre-trained neural network model, and outputting the gain of the user voice signal by the neural network; and calculating a product of the error signal and the gain to obtain a user voice signal.

Description

technical field [0001] This specification relates to acoustic technology, and in particular to an echo cancellation method, a voice activation method, an echo cancellation device, an audio device, and a computer-readable storage medium. Background technique [0002] The distance between the speaker and the microphone of an audio device is usually relatively close. If the speaker plays an audio signal and the user is far away from the audio device, in the sound signal collected by the microphone, the echo signal caused by the sound signal played by the speaker may be larger than the user's voice command. Much larger, resulting in the inability to accurately obtain the user's voice commands. For smart speakers, this situation will cause the microphone of the smart speaker to fail to detect the wake-up word, and thus cannot be woken up by the user, causing a bad experience for the user. [0003] When a speaker plays an audio signal, there will be nonlinear distortion, which in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0232G10L25/78
CPCG10L21/0208G10L21/0232G10L25/78G10L2021/02082
Inventor 陈国明
Owner GOERTEK INC
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