Nobuo Azuma

Microprocessor Controlled Variable Play-Back Speed System for Video Tape Recorder

A new home use video tape recorder with features of varying play-back speed is required for further attractive application of VTR especially in the field of sports, such as in training and form correction.

Design Philosophy and Practice of Microprocessor-Controlled Room Air Conditioner

Electrical home appliances go electronic rapidly these days. Figure 1 shows needs for a room air-conditioner to be. met by electronic control techniques ; seeds. The needs include power saving, comfortableness, low noise, improved function, operatability, and reliability. With the conventional mechanical control system, it is difficult to improve the comfortableness and operatability, and therefore, emphasis has been laid mainly on improvement of power consumption and noise characteristics. In contrast to this, an electronic control introduced to a room airconditioner can easily realize the following advantages: comfortableness due to finer thennostatic setting, operatability through feather touch operation and remote control, and reliability by a motor lock protection circuit. To get the maximum effect from a room air-conditioner equipped with an electronic control, the authors gave much thought to optimum daily and yearly room airconditioner operating patterns. With them, overcooling and overheating can be prevented, leading to simultaneous realization of power saving and healthy comfortableness. Such control is beyond the reach of the mechanical system, and this is an area where microprocessor control is most effective.

Multi-Track PCM Audio Utilizing 8 mm Video System

The 8mm Video system can realize the smaller-size & lighter-weight design, the better sound quality and the better picture quality than conventional VCRs.