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:
Aug. 04, 1998
Filed:
Jan. 18, 1996
Applicant:
Inventor:
Shinichi Ooi, Kanagawa-ken, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04K / ;
U.S. Cl.
CPC ...
380 20 ; 380 46 ;
Abstract
A decryptor includes a descrambler for descrambling the scrambled signals using a PN signal, a PN generator which shifts the state successively from its initial state setup by a scramble-key, generates PN signals based on a conversion logic at the shifted state and is capable of changing PNG altering information for generating PN signals and a controller for decrypting a scramble-key from the scrambled signal and giving information for specifying a scramble-key and PN signal generating logic.