Secure sca broadcasting system including subscriber actuated...

Details Secure sca broadcasting system including subscriber actuated... Secure sca broadcasting system including subscriber actuated...

H - Electricity

04

K

325/3

H04K 1/00 (2006.01) H04L 12/18 (2006.01) H04H 1/00 (2006.01)

Patent

CA 1094641

ABSTRACT A secure information broadcasting system including a central transmitting station for encoding data in binary form utilizing a keyword and transmitting a FM-SCA signal phase shift modulated by the encoded data. Each of a plurality of portable receiving terminals has an identification number stored therein. When a subscriber desires to display the broadcast information on his terminal, he enters a unique password which combined with the identification number to generate the keyword. The keyword is utilized to decode the received binary data. The portable terminal includes a receiver for decoding the phase shifted FM-SCA signal into the encoded binary data; a keyboard for entering the password, information and display commands; an alpha-numeric data display; a processor responsive to the inputs from the receiver and the keyboard for performing selected arithmetic and logic operations to generate output data to the data display and a bus connecting the circuits of the portable terminal for parallel signal flow.

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