Digital TV has nothing to do with the cable companies, or any other subscription service.
Television broadcasters are responsible for digital television, and its been around twenty years in development. Digital TV, finally will give television-broadcasters - your local TV stations - the competitive-edge they need to compete with pay TV.
Digital TV was created for free TV.
I just published an article about this and how digital TV (DTV) works. Here is its link:
"This FRIDAY: TIMES UP! Are You Ready For Digital TV?"