Patent ID: 11955939
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A control device comprising:
a difference calculator that calculates a maximum gain difference between frequency characteristics of an audio signal and desired frequency characteristics in a predetermined frequency band;
a center frequency calculator that calculates a center frequency between a first frequency and a second frequency, the first frequency being a frequency at which a gain difference between the frequency characteristics of the audio signal and the desired frequency characteristics is 1/√2 times the maximum gain difference and which is closest to a peak frequency among one or more frequencies lower than the peak frequency, the second frequency being a frequency at which a gain difference between the frequency characteristics of the audio signal and the desired frequency characteristics is 1/√2 times the maximum gain difference and which is closest to the peak frequency among one or more frequencies higher than the peak frequency, the peak frequency being a frequency at which the maximum gain difference is obtained;
a determiner that determines parameters of an equalizer that adjusts the frequency characteristics of the audio signal based on the maximum gain difference and the center frequency; and
an outputter that outputs the parameters to the equalizer.