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diff --git a/doc/filters.texi b/doc/filters.texi index f89b1d0b52..6d2672063c 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -2975,6 +2975,44 @@ atrim=end=5,areverse @end example @end itemize +@section arls +Apply Recursive Least Squares algorithm to the first audio stream using the second audio stream. + +This adaptive filter is used to mimic a desired filter by recursively finding the filter coefficients that +relate to producing the minimal weighted linear least squares cost function of the error signal (difference +between the desired, 2nd input audio stream and the actual signal, the 1st input audio stream). + +A description of the accepted options follows. + +@table @option +@item order +Set the filter order. + +@item lambda +Set the forgetting factor. + +@item delta +Set the coefficient to initialize internal covariance matrix. + +@item out_mode +Set the filter output samples. It accepts the following values: +@table @option +@item i +Pass the 1st input. + +@item d +Pass the 2nd input. + +@item o +Pass filtered samples. + +@item n +Pass difference between desired and filtered samples. + +Default value is @var{o}. +@end table +@end table + @section arnndn Reduce noise from speech using Recurrent Neural Networks. |