DOUBLE-TALK AND PATH CHANGE DETECTION USING A MATRIX OF CORRELATION COEFFICIENTS

摘要

A process is described which generates matrix coefficients using zero-lag autoand cross-correlations from signals commonly found in echo canceller. Double-talk and path changes are then detected using matrix operations such asdeterminants, eigendecompositions, or singular value decompositions (SVDs). Ina preferred embodiment, the determinant of the correlation-based matrix iscompared against predetermined threshold values.