Sanyo Electric Co., Ltd.

Semiconductor Components Industries, LLC

Masanori Kudo

Yasuji Saito

Masaaki Taira

A noise canceller is constituted by a forward linear prediction processor that performs forward linear prediction for a reception signal in a noisy section where the reception signal includes noise, and a backward linear prediction processor that performs backward linear prediction for the reception signal in the noisy section. A signal generator generates a replacement signal, to replace the reception signal in the noisy section, based on the forward linear prediction values obtained by the forward linear prediction and the backward linear prediction values obtained by the backward linear prediction. The signal generator obtains replacement values for a plurality of points within the noisy section 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 functional relationship to the time axis of the signal.

Noise canceller using forward and backward linear prediction with a temporally nonlinear linear weighting

A noise detecting apparatus detecting presence or absence of noise in a received signal, comprising: a first band selecting unit configured to select a first signal of a first frequency band that does not include a frequency band of the received signal and is higher than a center frequency of the received signal; a second band selecting unit configured to select a second signal of a second frequency band that does not include the frequency band of the received signal and is lower than the center frequency of the received signal; a signal selecting unit configured to compare strength of the first signal selected by the first band selecting unit and strength of the second signal selected by the second band selecting unit to select the signal of lower strength; and a comparing unit configured to compare the strength of the signal selected by the signal selecting unit with a predetermined threshold to output a signal depending on a result of the comparison.

Noise detecting apparatus and AM broadcast receiving apparatus

An AM radio receiving circuit is disclosed that comprises a front end circuit that converts an input AM modulation signal to an intermediate frequency signal that in turn is output; a pulse noise detecting circuit that detects pulse noise included in the AM modulation signal; a pulse noise removing circuit that removes the pulse noise included in the intermediate frequency signal output from the front end circuit based on the detection result of the pulse noise detecting circuit to output the signal; and a detecting circuit that detects the intermediate frequency signal output from the pulse noise removing circuit after removing the pulse noise to output an audio signal.

Growing community of inventors

Gunma, Japan

Masanori Kudo