Matsushita Electric Industrial Co., Ltd.

Shuzi Harada

Tetsuo Yamaguchi

Haruyasu Yamada

Eiichi Tsuboka

Takeji Kimura

Hidehiro Ochiai

Hirokazu Yoshino

Toshihide Hane

Tomio Oyama

An optical reader capable of optically reading a plurality of data comprises an object to be read having different coded information placed thereon, with each information having a unique control code, scan means for producing scanning light to be projected to said object, photo-electric conversion means for converting scattered light produced by the scan to an electrical signal, means for determining said control code and information by said electrical signal and means for sorting the information by said control code for storage, whereby different information is optically read while it is sorted by the control code unique to the respective information and stored.

Optical reader

The universal product code consisting of black bars and white spaces carrying information is discriminated by counting the occurrence period of electric signals corresponding to the guard pattern and averaging the count obtained thereby to provide a width information of the basic module, discriminating the first character by sampling the code in stop-start synchronization based on the width information, counting the occurrence period of electric signals corresponding to the (n-1)th character to provide another width information of the basic module from the count obtained thereby, and discriminating the n-th character by sampling the code in stop-start synchronization based on the basic module. Therefore, a high performance code discriminator can be achieved by a simple structure.

Code discriminator

A ghost signal cancellation system for cancelling ghost signals caused, for example, by reflection in a transmission line of television signals transmitted from a television transmitting station. This system is particularly suited for incorporation in a television receiver to improve the picture quality of a reproduced picture.

Ghost signal cancellation system

Growing community of inventors

Matsubara, Japan

Shuzi Harada