Patent ID: 8717006
Filing Date: 2014-05-06
Classification: G01R

Abstract:
1. A proportional bandwidth filter system for filtering an input signal with at least a first top octave portion and a second octave portion comprising: a bandwidth reducing filter to reduce a bandwidth of the input signal to create a reduced bandwidth signal; a down-sampler to roll the second octave portion represented in the reduced bandwidth signal to a top octave portion of a down-sampled signal; a first octave filter to receive the input signal, wherein the first octave filter is comprised of a first plurality of proportional bandwidth filters that partition and convert the input signal into output signals representing frequency spectra of the first top octave portion of the input signal; and a second octave filter to receive the down-sampled signal, wherein the second octave filter is comprised of a second plurality of proportional bandwidth filters that partition and convert the second octave portion represented as the top octave portion of the down-sampled signal into output signals representing frequency spectra of the second octave portion of the input signal.