Pioneer Electronic Corporation

Yasumasa Fukatsu

Toru Akiyama

Shuichi Mori

Shigeru Yasuda

Kenichiro Yasukawa

Takashi Sakakibara

A scanning method for high-speed reproduction of video data from a recording disk, whereby scanning is executed as a sequence of track jump operations, in which the data detection point of the pickup is caused to jump across tracks of the disk, alternating with intervals of play operation in which data are read from the disk. During each interval of play operation, data obtained from the disk are written into a memory, and thereafter are repetitively read out from the memory to produce an output video signal, until being updated during the next play interval. A display image that is free from noise and disorder is thereby obtained during scanning operation.

Scanning method for disk player

An automatic sound volume control device for use in a device such as a radio or tape player used in a high ambient noise environment. The noise and sound signal levels above predetermined reference levels are detected and a control signal is produced having a level determined in accordance with the output signals so produced. The amplification gain of the sound signal is set by this control signal. Several different ways of producing the control signal are described, each of which has particular advantages in different situations and for different types of reproduced sound.

Growing community of inventors

Saitama, Japan

Yasumasa Fukatsu