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:
Jul. 18, 1995
Filed:
Jan. 14, 1993
Hitachi, Ltd., Tokyo, JP;
Abstract
A digital communications system suitable for high-speed data transmission includes a transmitter and a receiver providing the ability to selectively switch between multiple coding and decoding methods. The transmitter includes a plurality of trellis coders, each of which performs a different type of coding on a transmission signal. The receiver includes a plurality of Viterbi decoders, corresponding to the different types of coders in the transmitter, for decoding the transmission signal. The receiver also includes a selector for determining which of the decoder outputs to choose from based on the frequency of code violations detected in the transmission signal. The present invention thus provides a flexible apparatus for improving the quality of high-speed data transmissions.