Aspects of broadcast communication

Child Classifications

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• H04H 2201/10 characterised by the type of broadcast system
• H04H 2201/30 characterised by the use of a return channel, e.g. for collecting users' opinions, for returning broadcast space/time information or for requesting data
• H04H 2201/40 characterised in that additional data relating to the broadcast data are available via a different channel than the broadcast channel
• H04H 2201/50 characterised by the use of watermarks
• H04H 2201/60 characterised in that the receiver comprises more than one tuner
• H04H 2201/70 characterised in that receivers can be addressed
• H04H 2201/80 characterised in that motion picture association of America [MPAA] ratings are used
• H04H 2201/90 characterised by the use of signatures