Combined function link type kernel self-response nonlinear echo cancellation method

A technology of echo cancellation and function combination, applied in two-way sound reinforcement telephone systems, interconnection devices, electrical components, etc., can solve the problems of large computational load, slow convergence speed, low convergence stability, etc. Eliminate the effect of good, fast and stable convergence

Pending Publication Date: 2021-07-13
SUZHOU UNIV
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Problems solved by technology

These two elimination methods are compared separately when they are running, and they model the linear and nonlinear characteristics of the echo path at the same time, so the algorithm has a large amount of calculation, slow convergence speed, and low convergence stability.

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  • Combined function link type kernel self-response nonlinear echo cancellation method
  • Combined function link type kernel self-response nonlinear echo cancellation method
  • Combined function link type kernel self-response nonlinear echo cancellation method

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[0025] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present application and not limit the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0026] The present application provides a combined function link type kernel adaptive nonlinear echo cancellation method. In this elimination method, the nonlinear transformation of the echo path is configured based on the kernel function transformation, and a synergy factor is introduced at the connection between the linear filter and the nonlinear filter, and the two filters are linked, so that the combined filter can be adjusted through the synergy factor, When the synergy factor approaches a first preset threshold...

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Abstract

The invention provides a combined function link type kernel self-response nonlinear echo cancellation method. According to the method, the echo cancellation effect is improved based on combined function link. The method comprises the following steps: performing kernel function extension processing on a far-end signal, filtering the processed signal and an original signal through an adaptive filter, linking the two filters through a collaborative factor, and updating the weight of the adaptive filter according to a filtering result, wherein the parameter value of the collaborative factor is updated based on an adaptive filtering result. The method is suitable for nonlinear echo cancellation.

Description

technical field [0001] The invention relates to the technical field of echo cancellation, in particular to a combined function chain type kernel adaptive nonlinear echo cancellation method. Background technique [0002] In recent years, the continuous development of communication and network technology has made people put forward new requirements for the quality of communication, the most important of which is the quality of voice calls. Acoustic echo is one of the important factors that reduce the quality of voice calls. In the past, the understanding of acoustic echo mostly refers to when the voice signal at the receiving end is released in the form of sound waves in the speaker, due to the echo of multiple propagation and reflection noises in the room, and because the vast majority of communication systems are fully Duplex mechanism, so the echo at the receiving end is transmitted to the sending end through the microphone, which affects the call quality. However, with t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M9/08
CPCH04M9/082
Inventor 芮贤义唐宇轩
Owner SUZHOU UNIV
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