Patent ID: 7869587
Filing Date: 2011-01-11
Classification: H04M

Abstract:
1. A method for canceling an echo signal for a signal input to a microphone in a mobile terminal with an acoustic echo canceller (AEC), the method comprising the steps of: (a) dividing a far-end signal into a plurality of subband signals; (b) estimating an echo signal using subband signals, the subband signals being lower than or equal to a reference value among the subband signals; (c) dividing a signal received from the microphone into a plurality of subband signals, and classifying the subband signals into high-band signals and low-band signals according to the reference value; (d) generating a residual echo signal by subtracting the estimated echo signal from the individual low-band signals; (e) synthesizing the residual echo signal; (f) gating on/off the high-band signals among the subband signals from the microphone according to bit rate information; and (g) synthesizing the high-band signals with the residual echo signal for each individual subband when outputting the high-band signals in the signal received from the microphone.