Multiplex communications – Wide area network – Packet switching
Patent
1994-05-26
1995-12-05
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 73, 370 77, 348460, 348906, H04J 324
Patent
active
054736099
ABSTRACT:
In an audio/video transmission system, a method of forming program guide information conducive to selective display at respective receivers includes arranging program guide information in different data blocks according to types of guide information. One such data block contains channel information (CSSM.sub.i) describing the respective channels. Respective CSSM.sub.i in this block include a channel information customer service system byte (CI.sub.-- CSS) which contains conditional access information related to a channel associated with a CSSM.sub.i. In a receiver embodiment, a subscriber specific byte (CA.sub.-- CSS) is stored and accessible to program guide processing apparatus. Prior to displaying received program guide information for a particular channel, the subscriber byte CA.sub.-- CSS is compared with the channel information byte CI.sub.-- CSS in the program guide. Dependent upon the results of the comparison, the guide data for that particular channel is either displayed or not displayed in the program guide.
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Herrmann Eric P.
Hom Shick
Kurdyla Ronald H.
Olms Douglas W.
Thomson Consumer Electronics Inc.
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