Interactive Television - Return Path

Return Path

To be truly interactive, the viewer must be able to alter the viewing experience (e.g. choose which angle to watch a football match), or return information to the broadcaster.

This "return path," return channel or "back channel" can be by telephone, mobile SMS (text messages), radio, digital subscriber lines (ADSL) or cable.

Cable TV viewers receive their programs via a cable, and in the integrated cable return path enabled platforms, they use the same cable as a return path.

Satellite viewers (mostly) return information to the broadcaster via their regular telephone lines. They are charged for this service on their regular telephone bill. An Internet connection via ADSL, or other, data communications technology, is also being increasingly used.

Interactive TV can also be delivered via a terrestrial aerial (Digital Terrestrial TV such as 'Freeview' in the UK). In this case, there is often no 'return path' as such - so data cannot be sent back to the broadcaster (so you could not, for instance, vote on a TV show, or order a product sample) . However, interactivity is still possible as there is still the opportunity to interact with an application which is broadcast and downloaded to the set-top box (so you could still choose camera angles, play games etc.).

Increasingly the return path is becoming a broadband IP connection, and some hybrid receivers are now capable of displaying video from either the IP connection or from traditional tuners. Some devices are now dedicated to displaying video only from the IP channel, which has given rise to IPTV - Internet Protocol Television. The rise of the "broadband return path" has given new relevance to Interactive TV, as it opens up the need to interact with Video on Demand servers, advertisers, and web site operators.

Read more about this topic:  Interactive Television

Other articles related to "path, return, return path":

Historical Development of Email Forwarding
... Postel in 1982, provided for a forward-path for each recipient, in the form of, for example, @USC-ISIE.ARPA, @USC-ISIF.ARPA Q-Smith@ISI-VAXA.ARPA — an ... concept at that time envisaged the elements of the forward-path (source route) moving to the return-path (envelope sender) as a message got relayed from one SMTP server to another ... if the system discouraged the use of source-routing, dynamically building the return-path implied that the "envelope sender" information could not remain in its original form during forwarding ...
Hybrid Fibre-coaxial - Transport Over HFC Network
... The forward-path or downstream signals carry information from the headend/hub office to the home, such as video content, voice and internet data ... The return-path or upstream signals carry information from the home to the headend/hub office, such as control signals to order a movie or internet data to ... The forward-path and the return-path are actually carried over the same coaxial cable in both directions between the optical node and the home ...
Optus Television - Optus ITV Trials
... the same HFC cable network both for delivery and for the return path, meaning no additional hardware or service was required for this return path ... relied on a telephone connection for the return path ... that it is platform neutral, meaning that the same telephone-based return path can be used for both cable and satellite installations ...
Variable Envelope Return Path
... Variable envelope return path (VERP) is a technique used by some electronic mailing list software to enable automatic detection and removal of undeliverable e ... It works by using a different return path (also called "envelope sender") for each recipient of a message ...
DOCSIS - Equipment
... Because of the noise in the return (upstream) path, an upstream port is usually connected to a single neighborhood (fiber node), whereas a downstream port is. 1.1 or above, it must upgrade its Hybrid fiber-coaxial (HFC) network to support a return path for upstream traffic ... Without a return path, the old DOCSIS 1.0 standard still allows use of data over cable system, by implementing the return path over regular phone lines, e.g ...

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