Patent ID: 6792107
Filing Date: 2004-09-14
Classification: H04B

Abstract:
A method of detecting double-talk comprising:effecting a cross-correlation between a received far-end signal and a transmitted near-end signal to determine their level of convergence; determining signal energy of the transmitted near-end signal; determining an average signal energy from the signal energy of the transmitted near-end signal and signal energy of any previously-transmitted near-end signals; if a comparison of the level of convergence with a first threshold indicates convergence, then enabling double-talk detection; if a comparison of the level of convergence with a second threshold indicates divergence, then disabling double-talk detection; if double-talk detection is not enabled, then setting an error threshold to the average signal energy; if double-talk detection is enabled and the signal energy of the transmitted near-end signal exceeds the error threshold, then indicating presence of double-talk; and if double-talk detection is enabled and the signal energy of the transmitted near-end signal does not exceed the error threshold, then indicating absence of double-talk.