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Echo detection method and device, computer readable storage medium and terminal equipment

A detection method and computer program technology, applied in telephone structure, speech analysis, instruments, etc., can solve the problems of poor double-talk performance, achieve the effect of strengthening echo suppression, improving echo cancellation and double-talk performance, and good call experience

Pending Publication Date: 2021-12-17
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0005] However, when the echo path does not change, due to the strong echo suppression parameters, when there is double-talk (Double-talk, DT) with uplink voice and echo at the same time, the uplink voice and echo will be eliminated together, resulting in double-talk poor performance

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  • Echo detection method and device, computer readable storage medium and terminal equipment
  • Echo detection method and device, computer readable storage medium and terminal equipment
  • Echo detection method and device, computer readable storage medium and terminal equipment

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Embodiment Construction

[0025] As described in the background art, when the echo path does not change, due to the strong echo suppression parameter, when there is both uplink voice and echo, that is, double-talk (DT), the uplink voice and echo will be eliminated together , resulting in poor dual-talk performance.

[0026] In the prior art, the method for detecting abnormal echo due to echo path change is mainly based on the cross-correlation between the microphone signal and the post-AEC signal. In this type of method, it is difficult to distinguish between normal double talk and abnormal echo, which in turn affects the abnormal echo. The accuracy of echo detection is likely to cause missed detection of abnormal echoes or false detection of normal double-talk, and it is difficult to balance the echo suppression processing of normal double-talk and abnormal echoes under hands-free calling.

[0027] In the technical solution of the present invention, the echo in the normal echo path can be eliminated b...

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Abstract

The invention discloses an echo detection method and device, a computer readable storage medium and terminal equipment, and the method comprises the steps: collecting an uplink voice signal, and carrying out the initial filtering operation of the collected uplink voice signal, and obtaining a filtered signal; calculating the correlation between the filtered signal and a downlink reference signal; and determining an echo state at least according to the correlation, wherein the echo state comprises existence of abnormal echoes and absence of echoes. According to the technical scheme, the call performance of the double-talk stage is improved.

Description

technical field [0001] The present invention relates to the technical field of speech processing, and in particular, to an echo detection method and apparatus, a computer-readable storage medium, and a terminal device. Background technique [0002] In audio systems, acoustic echo is due to the coupling between the loudspeaker and the microphone, causing the microphone signal to contain not only the useful upstream speech signal, but also the echo. If the microphone signal is not processed, the echo signal will be transmitted to the far-end speaker for playback, and the far-end caller will hear his delayed voice, which will make people feel uncomfortable and interfere with the upstream voice signal, thereby affecting the effect of the call. With the rapid development of science and technology, communication methods and application scenarios are becoming more and more diversified, and communication terminals are becoming more and more miniaturized and portable, which makes th...

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Application Information

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IPC IPC(8): G10L21/0264H04M1/19
CPCG10L21/0264H04M1/19G10L2021/02082
Inventor 潘思伟雍雅琴纪伟董斐
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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