Low complexity phone echo self-adaption eliminating method
A low-complexity, echo-cancellation technology, applied in two-way sound reinforcement telephone systems, etc., can solve problems such as numerous parameters, multiple mixing parameters, and complex transmission, achieving fast convergence and small steady-state errors
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[0052] A low-complexity telephone echo adaptive cancellation method, its steps are as follows:
[0053] A. Remote signal filtering
[0054] Sampling the far-end signal from the far-end to obtain the discrete value x(n) of the remote signal at the current moment n, and filtering the discrete value x(n) of the remote signal through a convex combination adaptive echo cancellation filter to obtain large Step filter value y 1 (n),y 1 (n)=w 1 (n) H x(n) and small step filter value y 2 (n),y 2 (n)=w 2 (n) H x(n); where w 1 (n) and w 2 (n) are respectively the tap weight coefficients of the large step size filter and the small step size filter in the convex combination adaptive echo cancellation filter of the current moment n, and its initial value is zero, and the superscript H represents the conjugate transpose;
[0055] B. Convex combination
[0056] Filter the value y with a large step size 1 (n) and small step filter value y 2 (n) Perform convex combination to obtain...
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