Patent ID: 6430295
Filing Date: 2002-08-06
Classification: G10K,H04M

Abstract:
A signal processing device, comprising:a first signal sensor; a first filter having an input coupled to an output of said first sensor; a second signal sensor; a second filter having an input coupled to an output of said second sensor and having an adjustable filtering characteristic; a summing device having a first input coupled to an output of said first filter and a second input coupled to an output of said second filter, wherein the adjustable filtering characteristic of said second filter is adjusted in dependence upon an output of said summing device to cause the second filter output to emulate the first filter output; and a processor for computing an estimate of at least one parameter indicating a relationship between said first and second sensors, wherein the estimate is computed as a function of a filtering characteristic of said first filter and as a function of the adjustable filtering characteristic of said second filter, and wherein the estimate includes estimates of a relative time delay and a relative scale factor between said first and second sensors with respect to a signal source.