Decoding method and circuit

Details Decoding method and circuit Decoding method and circuit

1977-06-27

1978-04-25

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

3401463Z, G06K 710, G06K 904

Patent

active

040864774

ABSTRACT:
A method and circuit for decoding coded electric signals from a scanner reading a coded label such as the Universal Product Code (UPC) label, establishes a plurality of counting gates based on a predetermined sequence of discrete signal transitions and counts a plurality of related pulse frequencies during the gating periods under control of the established counting gates. The counts are compared in a predetermined sequence to determine the relationship between their magnitudes (e.g., A < B; A > B) and a coded signal generated indicative of the relationship. The said coded signals indicate the value of the coded information.

REFERENCES:
patent: 3784792 (1974-01-01), Dobras
patent: 3811033 (1974-05-01), Herrin
patent: 3959625 (1976-05-01), Kashio
patent: 3961164 (1976-06-01), Reed
patent: 4000397 (1976-12-01), Hebert

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