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:
Feb. 22, 2000
Filed:
Apr. 07, 1997
Naoki Shimosaka, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
For supply to a time division multiplexer for multiplexing a predetermined number of digital multiplexer input signals bit by bit into a multiplexed signal in which a long pathological pattern is suppressed and which is supplied preferably to an optical network. A parallel scrambler subjects a plurality of digital video signals to scrambling of a prescribed number of scrambling stages with the prescribed number selected greater than the predetermined number. Produced by the scrambler, scrambled signals, equal in number to the digital video signals, are used in the digital multiplexer input signals preferably with an inverter used to invert one of the scrambled signals so that the predetermined number is equal to one plus the plurality.