Conditional access system of CATV

Details Conditional access system of CATV Conditional access system of CATV

2005-03-15

2005-03-15

Miller, John (Department: 2614)

Interactive video distribution systems

Access control or blocking

C725S027000, C725S091000, C725S093000, C725S095000, C725S109000, C725S114000, C725S116000, C725S135000, C725S138000, C725S143000, C725S144000, C725S146000

Reexamination Certificate

active

06868550

ABSTRACT:
In a CATV system, a digital head end transmits both an area code and such data containing a management number and a channel contrastive table to a terminal of each of areas; each terminal stores thereinto both the area code and the channel contrastive table; and the digital head end retrieves the corresponding management number by comparing a channel display number of an analog program set every area with the channel contrastive table based on this area code, and then, displays the analog program of this retrieved management number.

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