| 摘要 |
An echo cancellation method and device. The method comprises: dividing audio signals to be processed into high-band audio signals to be processed and low-band audio signals to be processed;an AEC module performing self-adaptive filter echo cancellation on the low-band audio signals to be processed, and not performing self-adaptive filter echo cancellation on the high-band audio signals to be processed so as to generate preliminary echo cancellation signals;an RES module performing envelope forecasting echo suppression on the high-band audio signals of the preliminary echo cancellation frequency-domain signals, and calculating and outputting a residual echo suppression coefficient;the RES module performing echo suppression on the low-band signals of the preliminary echo cancellation frequency-domain signals, and outputting the processing result;and multiplying the output result by the residual echo suppression coefficient, so as to output an echo cancellation signal.The device comprises the AEC module and the RES module.By respectively performing high-band and low-band processing on the signals to be processed, the method and the device reduce the amount of calculation for echo cancellation, as well as solving the problem that echo leakage exists at the sub-band boundary. |
