Complicating the whole mobile TV thing even further, IPWireless has come out with another standard, known as TDtv. This utilises spectrum that existing European operators already have, and is in direct competition with DVB-H.

It runs in what is known as unpaired TD spectrum and IPWireess already has four European operators already testing the system. One of which is in the UK.

TDtv has got a lot going for it. For starters, it keeps control of the broadcast content firmly in the hands of the network operator. Not a third party.
TDtv is built around MBMS - the TV version of multimedia messaging. Sprint Nextel has invested $10 million in the technology.