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Filtering method and device and electronic equipment

An electronic device and weighted filtering technology, which is applied in the direction of sound-generating equipment, voice analysis, instruments, etc., can solve the problems of poor voice quality and so on

Active Publication Date: 2020-08-11
VIVO MOBILE COMM CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a filtering method, device, and electronic equipment to solve the problem of poor voice call quality in electronic equipment

Method used

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  • Filtering method and device and electronic equipment
  • Filtering method and device and electronic equipment
  • Filtering method and device and electronic equipment

Examples

Experimental program
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Effect test

example 1

[0114] Example 1, when the background noise signal is a stationary noise signal, the electronic device can obtain the PSD of the background noise signal by averaging the power spectrum of the noise signal in the silent segment.

example 2

[0115] Example 2, when the background noise signal is a non-stationary noise signal, since the background noise signal changes rapidly with time, it is necessary to continuously track and correct the background noise signal.

[0116] Specifically, the PSD of the non-stationary noise signal can be estimated in at least two ways as follows.

[0117] In the first possible implementation:

[0118] Exemplarily, since the speech signal and the background noise signal are independent of each other, that is to say, the power spectrum of the noisy speech signal is equal to the sum of the power spectral densities of the speech signal and the background noise signal. During speech signal intervals or between syllables, the power spectrum of noisy speech is usually equal to the power spectral density of the background noise signal. Therefore, the electronic device can search the minimum value in the noise estimation window as the estimated value of the power spectral density of the backg...

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Abstract

The embodiment of the invention provides a filtering method and device and electronic equipment, which are applied to the technical field of communication and are used for solving the problem of poorvoice call quality of the electronic equipment. The method comprises the following steps: acquiring an estimated echo signal corresponding to a first voice signal output by a loudspeaker of the electronic equipment; subtracting the estimated echo signal from a first audio signal received by a microphone of the electronic equipment to generate a second audio signal, with the first audio signal comprising a second voice signal and a first echo signal fed back to the microphone by a loudspeaker; calculating a weighted filtering parameter according to an energy parameter of a residual echo signalin the second audio signal, with the residual echo signal being a residual echo signal in the second audio signal; and filtering the second audio signal according to the weighted filtering parameter to generate a target audio signal. The application is applied to an acoustic echo elimination scene.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a filtering method, device, and electronic equipment. Background technique [0002] With the development of communication technology, there are more and more electronic devices with hands-free voice communication system. Users can use the speaker and microphone of the electronic device to make voice calls with other users without picking up the electronic device and putting it on the ear . [0003] At present, due to the short distance between the speaker and the microphone of the electronic device, the sound output by the speaker of the electronic device may be fed back to the microphone of the electronic device, and the resulting acoustic echo phenomenon will affect the voice call quality of the electronic device. Contents of the invention [0004] Embodiments of the present invention provide a filtering method, device and electronic equip...

Claims

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Application Information

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IPC IPC(8): G10K11/178G10L21/0208G10L21/0264
CPCG10K11/17853G10K11/17875G10K11/17825G10L21/0208G10L21/0264G10L2021/02082
Inventor 张勇
Owner VIVO MOBILE COMM CO LTD
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