TV Media
TV
TV has made massive changed in the last few years, but the
progress it’s made since it was created, has really been amazing, to think that
TV’s changed from cable, which are channels 1-5, and all the way 500+ channels.
There were many people in the early 20th century
who invented TV. There were many competitions in which individuals and
corporations competed in in various parts of the world to deliver a device that
superseded previous technology. Even though some didn’t win, their ideas were
still good enough to capitalize on and make profit. TV is never going to stay
the same, there will always be changes to it, in the space of 20 years, there
has been Mechanical televise, electronic television, colour television, digital
television, smart television, 3D Television etc. To this day, things such as
Netflix and BBC iPlayer are the most used site to watch and catch up on
programmes that you missed when you couldn’t catch the first airing. The way
Americans watch movies has changed dramatically in the last few years because
of the man who thought up, and started up a company called Netflix. Now more
and more of us rent movies by mail. Reed Hastings is the co-founder of Netflix,
Netflix was the website which took over LOVEFiLM and Block busters.
Radio
With the invention of the radio, lots of people had their
part in helping create the radio, one person can’t really take all the credit
for the full invention of the radio. The whole concept of the radio is for it
to be wireless telegraphy. James
Clerk Maxwell showed in theoretical and mathematical form in 1864 that
electromagnetic waves could propagate through free space. Hertzian waves were
what the radio need for it to initially work. The name Hertzian waves came from
Heinrich Rudolf Hertz publishing the results of his experiments where he was
able to transmit electromagnetic waves (radio waves) through the air, proving
Maxwell's electromagnetic theory.
Most of the best
improvements of radio were made in the late 20th century, this is a
list of the changes that were made to the radio in that time period.
- 1954: Regency introduced a pocket transistor radio, the TR-1, powered by a "standard 22.5V
Battery".
- 1960: Sony introduced their first transistorized radio,
small enough to fit in a vest pocket, and able to be powered by a small
battery. It was durable, because there were no tubes to burn out. Over the
next twenty years, transistors displaced tubes almost completely except
for very high power, or very high frequency, uses.
- Early 1960s: VOR systems
finally became widespread; before that, aircraft used commercial AM radio stations for
navigation. (AM stations are still marked on U.S. aviation charts).
- 1963: Color television was commercially
transmitted, and the first (radio) communication satellite, TELSTAR, was launched. In the late 1960s, the U.S. long-distance
telephone network began to convert to a digital network, employing digital radios for many of its links.
- 1970s: LORAN became the premier radio navigation system.
Soon, the U.S. Navy experimented with satellite
navigation.
- 1987: The GPS constellation of satellites was launched.
- Early 1990s: Amateur radio experimenters began to use personal
computers with audio cards to process radio signals.
- 1994: The U.S. Army and DARPA launched an aggressive successful project to
construct a software
radio that could become
a different radio on the fly by changing software.
- Late 1990s: The digital transmissions began to be applied to
broadcasting.
Film
The history of film all began in
the 1890s. The image beside this text is a Cinématographe Lumière, one of the
first types of cameras to be able to record films, any film that it captured
would only be black and white.
Early movie cameras were fastened
to the head of their tripod with only simple levelling devices provided. These
cameras were thus effectively fixed during the course of the shot, and hence
the first camera movements were the result of mounting a camera on a moving
vehicle. The Lumière brothers shot a scene from the back of a train in 1896.
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