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Evaluation of Dynamics Processors' Effects Using Signal Statistics

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Existing methods of evaluating the action of dynamics processors, i.e., limiters, compressors, expanders, and gates do not provide results that have a direct correlation with the perceived and actual effect on the signals dynamics; aspects such as crest factor, dynamic range, and subjective acceptability of the processed signal or degree of optimization of the use of the transmission medium. A method is described that uses statistical analysis of the pre- and post-processed signal to allow the processor’s action to be characterized in a manner that correlates to the perceived effects and actual modification of signal dynamics. A number of signal statistical and user definable characteristics are introduced and, in addition to well-known statistical techniques, form the basis for this evaluation method.

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