Acoustic interference cancellation for hands-free terminals

For hands-free mobile terminals, it is desirable to implement an acoustic interference cancellation system comprising echo cancellation and noise reduction. In the present paper, an approach to integrate acoustic echo cancellation and noise reduction in hands-free communication is described. For enhanced performance of the system, a method of canceling the residual acoustic interference after echo cancellation is treated. A parameter originating from the cross-correlation property is proposed to control the integrated system.