Both Samsung's technology, called A-VSB, and LG's, called MPH, are compatible with today's digital-television standards, so stations can slip them in alongside their high-definition broadcasts. Unlike other mobile-television offerings, like FLO TV on Verizon cellphones, you probably won't need a subscription to tune in. And you can get the full range of programming offered on standard TV, including local news, sports and weather. The U.S. television standards-setting body, the ATSC, is currently testing the LG and Samsung technologies and may approve one this summer. That could get the show rolling by mid-2009.