专利名称：A device and method for reduction of
transients
发明人：ANDERS GINGSJO,BO HAKANSSON申请号：AU4065799申请日：19990331公开号：AU4065799A公开日：19991101
摘要：Device and method for reduction of signal transients, where the signal is dividedinto frequency bands, the device at least comprising a transient detector (1), a calculatingmeans, means for delaying a signal (2) and an adaptive filter. In the device an input signal(4) is arranged to both the means for delaying a signal (2) and the transient detector (1)via parallel connection, which both are connected to the adaptive filter (3) the output (5)of which is transient reduced. Characterizing is that the detector (1) detects frequencybands with a threshold function, which indicate presence of transient, and it indicatespresence of transient if derivative and/or input signal (4) level exceeds predeterminedlevels. The detector (1) activates, at the indication of a transient in a frequency band, acalculating means for calculation of a set of filter parameters, describing the gain of thefrequency bands, for controlling the transient reduction. If the detector (1) detectspresence of transient in only one frequency band, the filter parameters accomplishes atotal gain to a level determined by the level of the input signal (4). When the detector (1)no longer detects presence of transient the device goes back to the previous set of filterparameters.
申请人：ANDERS GINGSJO,BO HAKANSSON
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