The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 1984
Filed:
Mar. 29, 1982
Shin'ichi Koike, Tokyo, JP;
Eiichi Kobayashi, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
In a transmission system of a class IV partial response code succession produced in accordance with a predetermined encoding rule, a transmitter intentionally violates the encoding rule to carry a subsidiary signal, so that an intentional violation appears in a receiver as two consecutive violation signals located in every other time slot, differing from an unintentional violation occurring during transmission. In the transmitter, an intermediate succession from a precoder is monitored by a detection circuit to detect an appearance of each predetermined pattern and to give the intentional violation to the code succession. In the receiver, a violation detector detects both of the intentional and the unintentional violations in accordance with a detecting rule to produce a violation signal sequence. The two consecutive violation signals are distinguished from the violation signal sequence by another detector. As the predetermined patterns, two and twelve patterns are usable in a binary and a quaternary system, respectively.