Patent ID: 8077882
Filing Date: 2011-12-13
Classification: H03G,H04R

Abstract:
1. An audio signal processing apparatus comprising: a harmonic overtone adder and an equalizer, the harmonic overtone adder including: a high-pass filter for extracting from an audio signal a first frequency component equal to or higher than a first predetermined frequency; a filter for extracting from the audio signal a second frequency component equal to or lower than half a second predetermined frequency; an harmonic overtone generator for generating a frequency-doubled harmonic overtone component from an output from the filter; and a first combining unit for combining the first frequency component extracted by the high-pass filter and the frequency-doubled harmonic overtone component generated by the harmonic overtone generator; and the equalizer including: a level detector for detecting a level of the frequency-doubled harmonic overtone component contained in an output from the first combining unit; a gain controller for controlling dynamically the level of the frequency-doubled harmonic overtone component contained in the output from the first combining unit based on a detection output from the level detector; and a second combining unit for combining the output from the first combining unit with the frequency-doubled harmonic overtone component output from the gain controller.