Conditional access system of CATV
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 15, 2005
Grant Date -
N/A
app pub date -
Apr 10, 2000
filing date -
Apr 9, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
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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