History of TV History of Mass Communication

History of TV   Experiments in laboratories (1920s)   Transmitter installed in Empire State Building in NY

(1932)   Regular transmissions on limited basis (1936)   Potential to become mass medium (1940s)   Halted with beginning of WWII (1941)   FCC issues twenty four new licenses for TV transmitters

(1946)   Manufacture and sale of home receivers (1946)   Mass medium for home use (1950s)   VCR developed (1950s)   Cable systems (1980s)

Paul Nipkow Nipkow Disk (1884)  A mechanical

system that created a scanning effect when used with a beam of light,

Philo Farnsworth  Started basic design as a high school

student  Built a basic model with minimal funding

in his apartment  Awarded 1st patent for electronic TV

system  Vladimir Zworykin of Westinghouse also

invented an electronic system

Colour TV  Two colour systems perfected by CBS &

RCA (1946)  FCC insisted that the system for colour

transmission be such that existing B & W sets could still receive picture

 RCA got approval  Most network programs in colour (1976)

Cable Systems  Designed for homes without a clear line of

sight  Large antenna in a favourable location

and wire homes with coaxial cable to central facility

 Cable companies began to offer clients TV signals that originated in far away cities

Video Cassette Recorder (VCR)   Developed by the Ampex Corporation in NY   In 1952, Charles Ginsberg & Ampex engineers

set out to develop device that could be used to record TV programs on magnetic tape. Succeeded four years later

  1970s American companies developed different standards but all expensive

  Japanese standardised sizes and brought prices down