Echo cancellation method and device and electronic device

An electronic device, echo cancellation technology, applied in two-way sound reinforcement telephone system, speech analysis, instruments, etc., can solve the problem that the echo cancellation effect is not very good, etc.

Pending Publication Date: 2020-12-22
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] However, even if the above-mentioned method is used for echo cancellation, different electronic devices have different echo

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  • Echo cancellation method and device and electronic device
  • Echo cancellation method and device and electronic device
  • Echo cancellation method and device and electronic device

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Embodiment Construction

[0089] 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 making creative efforts belong to the protection scope of the present invention.

[0090] In order to improve the effect of echo cancellation, embodiments of the present invention provide an echo cancellation method, device, and electronic equipment, which will be described in detail below.

[0091] figure 2 A schematic flow chart of an echo cancellation method provided by an embodiment of the present invention specifically includes the following steps:

[0092] Step 201, obtain the currently collected audio data collected by the audio col...

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Abstract

The embodiment of the invention provides an echo cancellation method and device and an electronic device. The method comprises the steps that currently acquired audio data acquired by an audio acquisition module are acquired; the current moment and propagation time delay are acquired; a search range is determined according to the current moment and the propagation time delay; backup audio data corresponding to an echo signal of the currently acquired audio data are searched for in the backup audio data according to the search range to serve as an echo cancellation reference frame, wherein thebackup audio data are stored after the electronic device copies audio data output to an audio playing module; and echo signal cancellation is performed on the currently acquired audio data according to the echo cancellation reference frame. The search range for searching for the reference frame is determined according to the propagation time delay obtained by the electronic device through testingin advance, and the search range is more accurate, so that the echo cancellation effect can be improved.

Description

technical field [0001] The invention relates to the technical field of voice transmission, in particular to an echo cancellation method, device and electronic equipment. Background technique [0002] At present, many electronic devices have the functions of audio playback and audio collection at the same time. For example, electronic devices such as walkie-talkies that can perform voice calls must simultaneously implement audio playback and audio collection during the intercom process. In this case, acoustic echoes are unavoidable. Therefore, echo cancellation is required. [0003] see figure 1 , figure 1 It is a schematic diagram of the echo signal formation process. After the audio signal of the remote user is output from the audio output module 110 of the electronic device 100, it enters the audio playback module 200. Since the audio data played by the audio playback module 200 may pass through the room during transmission The walls, ceilings and other surfaces reflec...

Claims

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Application Information

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IPC IPC(8): G10L21/0264H04M9/08
CPCG10L21/0264H04M9/08
Inventor 居正
Owner HANGZHOU HIKVISION DIGITAL TECH
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