Subscription card for a videotex receiver

Details Subscription card for a videotex receiver Subscription card for a videotex receiver

H - Electricity

04

N

350/25

H04N 7/16 (2006.01) G06K 19/07 (2006.01) G07C 9/00 (2006.01) G07F 7/00 (2006.01) G07F 7/08 (2006.01) G07F 7/10 (2006.01) H04N 7/167 (2006.01)

Patent

CA 1156753

ABSTRACT OF THE DISCLOSURE A subscription card for videotex receivers, comprising: a) a support, b) means for processing the information, comprising in particular a control unit governing an arithmetical and logical unit and a live memory, c) an interface permitting exchanges between the card and the apparatus in which it is inserted (charging station or receiver), further comprising: d) a programmable memory comprising a plurality of locations for receiving numerical subscription blocks, e) a dead memory containing instructions for proceeding with the recording and selection of said subscription blocks, and for carrying out a calculation, (f) a calculation circuit receiving, from the receiver in which the card is inserted, numerical messages and receiving from said programmable memory a numerical subscription block, this circuit being adapted to work out an algorithm whose parameters are provided by the subscribers' keys on instructions obtained from the second dead memory and delivering, after the calculation, a numerical signal representing an operating key.

344660

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