Patent ID: 7376562
Filing Date: 2008-05-20
Classification: G10L

Abstract:
1. A method for determining at least one frequency component that is present in an input signal having a time varying structure, comprising the step of: converting an audio input signal to an electronic representation comprising a time varying input signal x(t); communicating said time varying input signal x(t) to a network of N nonlinear oscillators, each having a different natural frequency of oscillation and obeying a dynamical equation of the form selecting a source of said time varying input signal exclusive of said network of nonlinear oscillators; generating at least one frequency output from said network useful for describing said time varying structure, wherein said frequency output is at least one of (a) a frequency that is in the input signal, and (b) a frequency that is related to the input signal by an integer ratio other than a 1:1 ratio; wherein z