Patent ID: 7085245
Filing Date: 2006-08-01
Classification: G10L,H04B

Abstract:
1. An echo canceller comprising: a) a receive path having an input port and an output port; b) a send path having an input port and an output port; c) an adaptive filter with an input port coupled to said receive path, said adaptive filter generating an estimate of an echo based on first coefficients and first references, said adaptive filter further adaptively modifying said first coefficients in response to a receive input signal and a difference between said estimate and said echo; d) a subtractor with an addend input port coupled to said send input port, a subtractend input port coupled to an output port of said adaptive filter, and an output port coupled to a feedback input port of said adaptive filter; e) a reference memory buffer coupled to said send path and said adaptive filter for storing first references; f) a coefficient buffer coupled to said adaptive filter and said send path for storing first coefficients; g) a controller coupled to said adaptive filter, said controller: