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An echo cancellation method and apparatus

An echo and echo cancellation technology, applied in the electronic field, can solve problems such as differences in speaker playback effects, signal acquisition saturation, and inability to effectively play echo interference

Active Publication Date: 2015-04-15
CHONGQING HANYUAN MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for eliminating echo, which is used to solve the problems existing in the prior art that the signal acquisition saturation phenomenon of the call microphone and the difference in the playback effect of the speaker cannot effectively eliminate the echo interference. , can improve the echo cancellation effect and improve the call quality

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Embodiment Construction

[0096] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0097] As mentioned earlier, it can be referred to figure 1 The schematic diagram of the circuit principle of the existing echo cancellation method is shown. When performing echo cancellation in the prior art, the far-end voice signal obtained during the communication process is directly used as the reference echo signal as input, and the signal collected by the microphone is used as the reference echo signal at the same time. The other input is sent to the adaptiv...

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Abstract

An echo cancellation method comprises: an acquisition microphone acquiring a sound signal; a conversation microphone acquiring a near-end voice signal; cancelling an echo component in the near-end voice signal according to the sound signal, and generating a voice signal obtained after the echo cancellation; and outputting the voice signal obtained after the echo cancellation. Also disclosed is an echo cancellation apparatus. By using the present invention, the effect of echo cancellation can be improved, thereby improving the conversation quality.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and device for eliminating echo. Background technique [0002] Communication devices such as mobile terminals are often subject to echo interference during a call, which may include echo interference from a speaker received by a microphone, etc. These echo interference may directly affect call quality. In this regard, an echo cancellation scheme is proposed in the prior art. During the communication process, the far-end voice signal sent to the speaker is used as a reference to perform an echo cancellation operation on the near-end voice signal. [0003] When the loudspeaker of the communication device causes the saturation of the microphone acquisition signal, and the difference in the playback effect caused by the limitation of the software and hardware of the speaker, too many nonlinear components will be introduced into the near-end voice signal. In this case, T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M9/08H04R3/02
CPCH04M9/082H04R3/02H04R2499/11
Inventor 刘媛媛张德明
Owner CHONGQING HANYUAN MACHINERY
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