A method for enhancing the acoustic echo cancellation system using residual echo filter

摘要

The present invention discloses an improvement to a digital Acoustic Echo Control in the hands-free telephone (AEC). The present invention additional to the adaptive filter technology, wherein the filter is a typical echo canceller is arranged to then set the effective control for the AEC system, which can be used to construct the appropriate filters and a residual echo which is referred to as a residual echo filter a signal (b (i)) and the system coupling factor (β (i)) and is used to accurately estimate the effect. The invention also further achieve consistent echo cancellation results and the echo canceller, residual echo suppressor technology and a control block means performing a joint operation control of the residual echo filter to enhance the output signal quality.