The DVB-H specification for broadcasting
to battery-powered handheld devices, and a related set of specifications
for IP datacast (DVB-IPDC), are the key enabling technologies
for mobile television.
DVB-H is largely based on the successful DVB-T
specification for digital terrestrial television, adding to it
a number of features designed to take account of the limited battery
life of small handheld devices, and the particular environments
in which such receivers must operate. The use of a technique called
time-slicing, where bursts of data are received periodically,
allows the receiver to power off when it is inactive leading to
significant power savings. DVB-H also employs additional forward
error correction to further improve the already excellent mobile
performance of DVB-T.
The specifications for IP Datacast are essential
to the convergence of broadcast networks and mobile telecommunications
networks that will almost certainly be central to the majority
of commercial launches of DVB-H services. The specifications cover
the overall system architecture, electronic service guide (ESG),
content delivery protocols, and the PSI/SI that will make the
establishment of convergent networks possible.