Pa u prvoj fazi svi emituju test FTA...
Posto je tehnologija digi onda nije neki problem da se koriste kodiranja kao i kod SAT tv-a.
Inace evo tehnickog "objasnjenja" na engleskom.
"The DTV signal is broadcast on a standard 7MHz chunk of spectrum on UHF and/or VHF close to the existing analog signals, so in most cases can be received with your existing antenna setup.
The DTV signal is COFDM (Coded Orthogonal Frequency Division Multiplexing) which means it uses a large number of carriers which are QAM modulated with pieces of the binary information.
OFDM is quite resilient to multi-path interference and because the data is convolutionally coded and reordered it is also resilient to transient noise and a substantial amount of errors.
(Convolutional coding rate on networks varies from 2/3 to ¾)."
A ovo je manje vise isto kao i kod sat-tv:
"Multichanneling – the ability for one broadcaster to deliver multiple separate ‘video streams’. This could consist of entirely different programs, or perhaps a different camera angle at a sporting event.
Widescreen - see movies, sports and TV shows in a wide 16:9 aspect ratio
High Definition – programs that are broadcast at a much higher resolution
High quality sound – digital formats including Dolby Digital 5.1"