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. 30, 1996
Filed:
Oct. 28, 1994
Pablo Miliani, Westlake Village, CA (US);
California Amplifier, Camarillo, CA (US);
Abstract
An encryption/decryption system which facilitates simultaneous decryption of multiple encrypted television signals thus making them simultaneously available for direct tuning in television receivers. The system is characterized by the utilization of a plurality of channel signals each containing picture portions and synchronization portions respectively corresponding to the picture components and synchronization components of a different video signal. Corresponding portions of all channel signals are time synchronized with respect to a common timing reference signal. Each channel signal is encrypted in accordance with a predetermined encoding rule and distributed to subscriber sites where the channel signals are made simultaneously available for viewing by decrypting them synchronously with the recovered timing reference signal in accordance with the inverse of the encoding rule.