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:
Jan. 31, 1995
Filed:
May. 07, 1992
Shinichi Kawada, Tokyo, JP;
Keiichiro Hijino, Tokyo, JP;
Hiroshi Wada, Saitama, JP;
Masahisa Iida, Kanagawa, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Kokusai Denshin Denwa Co., Ltd., Tokyo, JP;
Abstract
In a synchronization system for use in a digital transmission system in which an encoded digital transmission signal at least part of bits of which have specific statistic characteristics is transmitted, a digital transmission signal received by a decoder within a digital transmission apparatus at a receiving end is subjected to a decoding processing in units of samples on the basis of a synchronous input signal. The digital transmission apparatus at the receiving end includes a monitor for monitoring internal states of the decoder which vary between a synchronous state and an asynchronous state owing to the statistic characteristics of the digital transmission signal, a synchronization detector for determining whether the digital transmission system is in the synchronous state based on an output of the monitor, and a phase shifter for shifting a relative phase of the digital transmission signal against a synchronous input signal supplied to the decoder, one bit by one on the digital transmission signal in units of samples, in the case that a determination result of the synchronization detector indicates the asynchronous state.