Patent ID: 8082146
Filing Date: 2011-12-20
Classification: H04B

Abstract:
1. A noise canceller comprising: a forward linear prediction processor that performs forward linear prediction for a noisy section of a reception signal in a section of the reception signal which includes noise as indicated by a noise detection signal to obtain forward linear prediction values for a plurality of points in the noisy section of the reception signal, the noisy section of the reception signal corresponding to a section of the reception signal that contains noise as indicated by a noise detection signal; a backward linear prediction processor that performs backward linear prediction for the noisy section of the reception signal to obtain backward linear prediction values for the plurality of points; a signal generator that obtains replacement values for the plurality of points to generate a replacement signal including the replacement values, the replacement value for each of the plurality of points being generated based on both of the corresponding forward linear prediction value and the corresponding backward linear prediction value; and an output changeover controller that outputs the replacement signal in place of the noisy section of the reception signal and outputs the reception signal where the reception signal does not contain noise, based on the noise detection signal, wherein the signal generator obtains the replacement value for each of the plurality of points by weighting the corresponding forward prediction value and the corresponding backward prediction value with an internal division ratio, the internal division ratio having a linear or nonlinear function relationship to the time axis of the signal.