H04H2201/00 - CPC Classification

Aspects of broadcast communication

• H04H2201/10 » {characterised by the type of broadcast system} 4
• H04H2201/30 » {characterised by the use of a return channel, e.g. for collecting users' opinions, for returning broadcast space/time information or for requesting data} 140
• H04H2201/40 » {characterised in that additional data relating to the broadcast data are available via a different channel than the broadcast channel} 136
• H04H2201/50 » {characterised by the use of watermarks} 126
• H04H2201/60 » {characterised in that the receiver comprises more than one tuner} 70
• H04H2201/70 » {characterised in that receivers can be addressed} 96
• H04H2201/80 » {characterised in that motion picture association of America [MPAA] ratings are used} 23
• H04H2201/90 » {characterised by the use of signatures} 268

Recent Application in this class: