Nippon Columbia Kabushiki Kaisha

Masao Ichimura

Yoshihisa Kamo

Takeshi Tachibana

The present invention is to increase the carrier level so as to improve the S/N ratio when the factor T.sub.93, T.sub.T or T.sub.Q is small in level. When the level is low, noises are apt to be offensive to a listener's ear, but the reproducing level may be judged by the low level of T.sub..SIGMA., T.sub.T or T.sub.Q. Accordingly, the low level of T.sub..SIGMA. or T.sub.T is detected to raise the carrier level, and to reduce an FM demodulation noise and hence to improve the total S/N ratio.

Growing community of inventors

Kawasaki, Japan

Masao Ichimura