Mitsubishi Denki Kabushiki Kaisha

Yoshiharu Osuga

Noboru Yashima

Noboru Kyouno

Katsuaki Matsumoto

Hidenori Yamasaki

In a digital channel divider of the present invention, a plurality of filters are connected in parallel, which can set a desired transmission frequency response optionally for a digital input signal, so that signals outputted from each filter are outputted independently. In order to flatten the amplitude characteristic of an overall transmission frequency response of each channel and to obtain a linear phase frequency response, a time series impulse response is calculated based on an inverse characteristic and this time series impulse response is made to be a filter factor, and this filter factor and and the digital input signal are calculated by convolution operations.

Acoustic system

An arrangement for preventing a condensation on a head for writing information into a storage medium and for reading the information from the storage medium. The arrangement includes a temperature detector for detecting the temperature of the head and a condensation detector for detecting condensation on the head, the temperature detector and the condensation detector being provided in the vicinity of the head, and a heater for heating the head. A controller causes the heater to be energized on the basis of the outputs from the temperature detector and the condensation detector if the head is below a predetermined temperature or if condensation exists on the head at temperatures above the said predetermined temperature.

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Hyogo, Japan

Yoshiharu Osuga