Abstract: An apparatus for compensating a frequency characteristic of a reproduction audio signal removes noise from the reproduction signal in the high-frequency region during reproduction of the audio signal, and then emphasizes the noise-removed reproduction signal, thereby improving the frequency characteristic of the reproduction signal. The apparatus includes a high-pass filter for passing only a high-frequency component of the reproduction signal, a clipper for generating a clipped signal by cutting off a signal between predetermined levels from the high-pass filtered reproduction signal, and an adder for superposing the clipped signal on the reproduction signal to emphasize a high-frequency signal. The apparatus improves the frequency characteristic of a signal during reproduction and enhances a signal-to-noise (S/N) ratio by removing a noise component in the high-frequency region of the reproduction signal and controlling the level of the reproduction signal.

Abstract: An apparatus for controlling an audio recording bias is provided for improving a signal-to-noise (S/N) ratio in a high-frequency region of a recording signal by controlling a bias when an audio signal is recorded. The apparatus includes a high-pass filter for passing only high frequency components of an input audio signal, and a bias signal generator for generating an oscillating bias signal which is inversely proportional to the level of the high-pass filtered audio signal, and is of a predetermined level in the middle- and low-frequencies of the input audio signal. In the above-described apparatus, a bias level is controlled in the high-frequency region of an input audio signal so that the saturation of the audio signal in the high-frequency region is prevented to thereby expand a frequency area of the signal being recorded. Also, the level of the recording signal is heightened compared to the conventional art, thereby improving the S/N ratio in the high-frequency region.

Abstract: An audio signal recording compensation apparatus enhances a frequency characteristic and prevents saturation of a recording signal by controlling the level of the recording signal when an audio signal is recorded. The audio signal recording compensation apparatus includes a high-pass filter (32) for passing only a high-frequency component of a recording signal. A clipper (34) generates a clipped signal by cutting off the high-pass filtered recording signal beyond predetermined amplitude levels. An adder (36) generates a compensation recording signal by superimposing the clipped signal and the recording signal. In the apparatus, a high frequency component is emphasized without distortion of the recording signal by controlling the level of the high frequency components of the recording signal, thereby improving the frequency characteristic.