Method and device for canceling echo

A technology of echo cancellation and echo, which is applied in the field of communication, can solve problems such as inability to achieve self-adaptation, and achieve the effects of improving user experience, improving voice quality, and eliminating echo

Active Publication Date: 2013-11-13
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides an echo cancellation method and device to at least solve the proble

Method used

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  • Method and device for canceling echo
  • Method and device for canceling echo
  • Method and device for canceling echo

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Embodiment Construction

[0029] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0030] This embodiment provides an echo cancellation method, such as figure 1 As shown, the echo cancellation method includes step S102 to step S106.

[0031]Step S102: Estimate the characteristic parameters of the echo path of the echo signal.

[0032] Step S104: Using the source signal of the echo signal as a reference signal, an echo estimation signal is generated according to the characteristic parameters of the echo path.

[0033] Step S106: subtracting the echo estimation signal from the speech signal to be processed.

[0034] Through the above steps, first estimate the echo path characteristic parameters of the echo signal, then use the source signal of the echo signal as a reference signal...

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Abstract

Provided are an echo elimination method and device. The method includes: estimating an echo path characteristic parameter of an echo signal; taking a source signal of the echo signal as a reference signal, generating an echo estimation signal according to the echo path characteristic parameter; and subtracting the echo estimation signal from a to-be-processed speech signal. The present invention solves the problem in the related art that self-adaptation cannot be achieved when a returned near-end audio is suppressed, thus facilitating the enhancement of the speech quality of a conference and the improvement of user experience.

Description

technical field [0001] The present invention relates to the communication field, in particular to an echo cancellation method and device. Background technique [0002] Audio quality has always been a huge issue plaguing conference calls. During the conversation between the two parties, the conference terminal is generally composed of two channels. Among them, the downlink receiving channel decodes, reconstructs, and amplifies the voice signal transmitted from the opposite end to the speaker for playback. The uplink sending channel is nearly The voice signal of the end user is collected through the microphone, and after voice processing and encoding, it is sent to the opposite end of the conference. In actual work, since both parties in the meeting need to speak at the same time, the speaker and microphone may both be working at the same time, such as figure 1 shown. In the scenario where both parties in the conference talk at the same time, due to the limitation of the si...

Claims

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Application Information

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IPC IPC(8): H04M9/08
CPCH04B3/23H04M9/082G10K11/16G10L21/02
Inventor 李兴波徐发国刘婷马清李晓亮
Owner ZTE CORP
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