Pay per view television signaling method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 7, 1990
Issued Date -
N/A
app pub date -
Nov 22, 1989
filing date -
Nov 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of operating a pay per view television system in which the television signal includes a program tag and an IPPV tag identifying memory locations in subscriber authorization memories. A subscriber can self-authorize his terminal decoder to unscramble a pay per view program with a password that inputs a '1' to the memory location identified by the IPPV tag. The program tag is changed to indicate the memory location identified by the IPPV tag, thus enabling subscribers who bought the program to unscramble the signal. The head-end periodically polls each subscriber terminal to determine the status of the second memory location and to reset it to '0' after the pay per view event.
First Claim
Family
International Classification(s)
Cited Art Landscape
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