Much more information can be sent in a radio channel if the information is digital and is compressed. It now becomes apparent that with the use of digital technology, four NTSC type transmissions can be made in the same space as one analog NTSC channel. More information in the same radio channel. Higher definition, movie type of transmission. Excellent quality of signal.
Stations can transmit four separate channels at certain times and one HDTV channel at other times.
A very interesting question indeed. Before answering this question, let s examine the digital television rollout schedule. Stations in top ten markets must broadcast digital television along with analog. All commercial stations must be digital ready. Analog transmissions must cease.