VOICE SIGNAL PROCESSING CIRCUIT

摘要

PURPOSE: An audio signal processing circuit is provided to suppress degradation of sound quality by emphasizing sound in a frequency range lower than a playable frequency range of a speaker, thereby preventing distortion of an audio signal generated when playing. CONSTITUTION: A sound signal processing circuit structure includes a first low pass filter(LPF)(60) passing a component in a frequency range lower than the playable minimum frequency and a first high pass filter(HPF)(110) passing a component in a frequency range higher than the playable minimum frequency of the speaker while having approximately the same phase characteristic with the first low pass filter. A harmonics generation unit(80) generating harmonics from the sound signal passed through the first low pass filter and a first summation unit(100) summing a sound signal according to the output of the harmonics generation unit with a sound signal according to the output of the first high pass filter is prepared. [Reference numerals] (100) Summation unit; (21) Tuner; (22) System LSI; (50) IF processing unit; (80) Harmonics generation unit