Broadcasters are building their own mobile TV service

According to phonescoop, broadcasters are quietly testing a service that would send digital television to mobile phones.  That means TV is going up against the phone companies who also offer video services:

The association representing the broadcasters has successfully tested transmitting digital TV to mobile phones and laptops with modems in Chicago and Denver. Digital TV broadcasts are a year from commercial deployments, and the broadcasters are still mulling any business plan for providing such a service. Broadcasters could add DTV to their service offerings for a one-time cost of $100,000 to add the proper transmitter to their exiting equipment. READ FULL STORY

So the question is, just who are these broadcasters? The networks? Locals? Both?

(Thanks Will-E)