Page 21 - Electronic Media

Electronic Media 21

and models were introduced as certain technologies made it
possible.

$ By 1923, Vladimir Zworykin, while working for Westinghouse
Electric Corporation had produced what was called an electronic
camera tube.

$ By 1931 RCA had introduced an improved camera tube that
stored electrical charges and was called the iconoscope.

$ Around 1941 the United States implemented the 525-line
television which provided better clarity, but the world’s first 625-
line television system was designed in the Soviet Union in 1944
and by 1946 had become a national standard system. The first
broadcast (625-line standard) occurred in 1948 in Moscow.
Soon the 625-line standard was implemented across Europe as
the CCIR standard.

$ The early days television was broadcasted in black and white
and all televised shows were live – unlike today where just about
everything is pre-recorded, live television being too risky for
something to go wrong.

$ The first national television broadcast in the United States
occurred on September 4th, 1951 when President Harry Truman
gave a speech during the Japanese Peace Treaty Conference in
San Francisco, California.

$ Cable and satellite television emerged in the 1970s with more
channels to choose from and the advent of subscription television
which many people enjoyed because of the little or no commercial
advertising that interrupted standard television programs from
local and national television stations.