H04N21/00

Selective content distribution, e.g. interactive television, VOD [Video On Demand] (broadcast communication H04H; arrangements, apparatus, circuits or systems for communication control or processing being characterised by a protocol H04L 29/06; real-time bi-directional transmission of motion video data H04N 7/14) [2011.01]

Note(s) This group covers :[2011 01] interactive video distribution processes, systems, or elements thereof, which are characterised by point-to-multipoint system configurations, and which are mainly used for motion video data unidirectional distribution or delivery resulting from interactions between systems operators, e g  access or service providers, or users e g  subscribers, and system elements such systems include dedicated communication systems, such as television distribution systems, which primarily distribute or deliver motion video data in the manner indicated, which may, in addition, provide a framework for further, diverse data communications or services in either unidirectional or bi-directional form  However, video will occupy most of the downlink bandwidth in the distribution process typically, system operators interface with transmitter-side elements or users' interface with receiver-side elements in order to facilitate, through interaction with such elements, the dynamic control of data processing or data flow at various points in the system  This interaction is typically occasional or intermittent in nature processes, systems or elements thereof specially adapted to the generation, distribution and processing of data, which is either associated with video content, e g  metadata, ratings, or related to the user or his environment and which has been actively or passively gathered  This data is either used to facilitate interaction or to alter or target the content  In this main group, the first place priority rule is applied, i e  at each hierarchical level, in the absence of an indication to the contrary, classification is made in the first appropriate place