Method and apparatus for device control by data transmission in TV lines
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United States of America Patent
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-
Oct 22, 1996
Grant Date -
N/A
app pub date -
May 19, 1993
filing date -
May 19, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A video signal processing system, such as a pay TV system, that includes a smart card access control feature decodes control information from data included in groups of video line intervals that represent data channels. Each channel includes data arranged in packets of data. Each packet includes both descriptor data and application data. The packets of data are extracted from the video lines by a data dispatcher. After receiving a packet from a data channel, the data dispatcher analyses the descriptor data to determine the target for the application data. The data dispatcher transmits the application data contained in the packet, without analyzing the data, to the correct target processor unit, e.g. either a control access processor or a decoder intelligent processor. Information that may be transferred to the decoder processor includes, a specific channel allocation table, data related to the VTR of the customer, and information related to a geographic location.
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