Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1982-03-29
1985-01-15
Buczinski, S. C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
200 5109, 339 74R, 339 75R, 339 75M, 339 75MP, 339 82, 339273R, 339273F, 358117, H04N 716, H04K 104, H01R 3330, H01R 1362
Patent
active
044941439
ABSTRACT:
A descrambler or decoder for premium scrambled television signals compares the tier of the received signal with the contents of a memory associated with the descrambler. The memory of each descrambler establishes the tiers which are to be decoded according to what the user of the descrambler has requested or paid the system operator for. The memory is in the form of a small plug which mates with a receptacle which is coupled to a tier comparator within the descrambler. The memory plug includes a predetermined circuit for each tier arrangement which a user or subscriber may request. Due to its small size and physical arrangement, the tier-establishing memory is resistant to tampering by the user, thereby preventing access to premium programming by unauthorized subscribers.
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U.S. patent application Ser. No. 340,452 filed Jan. 18, 1982 in the names of Williams and Masri.
Firestone William L.
Lovick Richard B.
Buczinski S. C.
Coalter Richard G.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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