METHOD, APPARATUS, AND SYSTEM FOR ANALYSIS, EVALUATION, MEASUREMENT AND CONTROL OF AUDIO DYNAMICS PROCESSING

摘要

A method, apparatus, and system for measuring and analyzing the effects of dynamics modifying processors on a signal. This new approach utilizes statistical analysis techniques to provide a direct comparison and evaluation between the processed signal and the unprocessed signal's dynamic characteristics. The method identifies and quantifies Effective Dynamic Range, Clip Tolerance, Lower Limit Tolerance, Crest Factor, and Diminuendo Factor, using either peak or r.m.s values. In an alternative embodiment, the invention allows for user adjustment and control of the relative relationship of Crest Factor and Diminuendo Factor, which the user may perceive as loudness.

主权项

1. A method for allowing a user to adjust the compression levels of an audio signal, the method comprising: an audio signal input; an audio output signal; a means of measuring the probability density function of a signal for a given time window; a processor that can calculate the Effective Dynamic Range (difference between Clip Tolerance and Lower Limit Tolerance) and the Crest Factor (ratio of the median signal value to the Clip Tolerance), and the Diminuendo Factor (ratio of the median signal value to the LLT); and a means for control that allows for an adjustment of the sequence of voltage values to alter the relative relationship of Crest Factor, Effective Dynamic Range, Diminuendo Factor, and Lower Limit Tolerance within total frequency bands of interest (e.g., the audio band from 20-20 kHz) or a sub-band or sub-bands of the frequency band of interest, such as the bass range or the middle frequency range; or multiple sub-bands analyzed and processed separately and simultaneously.