Patent ID: 6097824
Filing Date: 2000-08-01
Classification: H04R

Abstract:
An improved multiband audio compressor of the type having a filter bank including a plurality of filters for filtering an audio signal, wherein said filters filter the audio signal into a plurality of frequency bands, and further including a plurality of power estimators for estimating the power in each frequency band and generating a power signal for each band, and further including a plurality of gain calculators for calculating a gain to be applied to each frequency band based upon the power signal associated with each frequency band, and further including means for applying each gain to its associated band and for summing the gain-applied bands, wherein the improvement includes an improved, heavily overlapped, filter bank comprising:a plurality of filters, said filters having sufficiently heavily overlapped frequency bands to reduce the ripple in the frequency response of the filter bank, given a slowly swept sine wave input signal, to to below 2 dB.