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. 09, 1980
Filed:
Oct. 17, 1977
Applicant:
Inventor:
Norman C Seiler, West Melbourne, FL (US);
Assignee:
Harris Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K / ; H04K / ;
U.S. Cl.
CPC ...
179 / ; 178 22 ; 179 / ;
Abstract
A privacy communication system in which increased security is provided in the scrambling of speech signals. Input speech is separated into a high frequency band and a low frequency band, and each band is time scrambled independently and recombined prior to transmission. Additional security is obtained with randomly selected segments of the scrambled speech being reversed in time. Further randomizing of the pseudorandom sequence which controls the scrambling operation is also provided, as well as simplified computing of delay times for the descrambling operation.