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. 22, 1986
Filed:
Feb. 28, 1983
Gordon E Kelly, Algonquin, IL (US);
Mutsuo Nakanishi, Glen Ellyn, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
An STV system commonly transmits scrambled television signals which include encoded data reflecting subscriber address, authorization and program code information. In some STV systems the subscriber installation characteristically comprises a non-addressable converter for converting a transmitted RF signal to an output signal having the frequency of standard VHF television signal. The invention is addressed to an addressable adapter which responds to the output signal of the converter to render the subscriber installation addressable. To this end, the adapter comprises tuning means, data retrieval means and an addressable data processor for deriving, among other information, a decode enable signal. The decode enable signal is instrumental in deriving an unscrambled television signal from the converter output signal.