Patent ID: 8571233
Filing Date: 2013-10-29
Classification: H03G

Abstract:
1. A signal characteristic adjustment apparatus which adjusts characteristics of an input signal, the apparatus comprising: a level control unit which controls a level of the input signal; a characteristic adjustment unit which adjusts characteristics of the input signal, the level of which is controlled by the level control unit; and a coefficient calculation unit which calculates a level control coefficient used to adjust level control of the level control unit and a characteristic adjustment coefficient used to adjust characteristic control of the characteristic adjustment unit based on a feature quantity of the input signal, wherein the coefficient calculation unit calculates a clipping prevention coefficient used to prevent clipping based on the feature quantity of the input signal, decides the level control coefficient based on the clipping prevention coefficient when the calculated clipping prevention coefficient is greater than a pre-set threshold, and decides the level control coefficient based on the pre-set threshold when the calculated clipping prevention coefficient is less than the pre-set threshold, and wherein the coefficient calculation unit calculates the clipping prevention coefficient based on feature quantities extracted from the input signal and an equation of square error minimum reference, which is prepared by executing, in advance, regression analysis of the feature quantities.