Others had been transmitting television before this but WRNY was the first to have a regular scheduled program.
Hughes, along with Japanese partners, is also preparing to start a Japanese version of its DirecTV service, which transmits digital television from satellites to homes.
CBS and NBC have pledged to transmit high-definition television.
TMC in Monaco were the last broadcasters to transmit 819-line television, closing down their System E transmitter in 1985.
Mr. Graybill noted that compression technology was central to telecommunications, from facsimile machines to transmitting high-definition television, and the technology could have many applications.
In 1935 he and three colleagues reported that the newly developed coaxial cable could transmit television or up to 200 telephone circuits.
The antennas are also used by amateur (ham) radio operators to transmit two-way amateur television.
It transmits digital television which it is line fed from Sheffield (Crosspool) (also known as the Tapton Hill transmitting station).
The Chesterfield transmitter sits on a hillside to the north of the town and transmits digital television and radio services.
In a unanimous vote, the commission approved the general technical parameters that broadcasters must follow in transmitting high-definition television, or HDTV.