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History of Mass Communication (TV)


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History of Mass Communication (TV)

  1. 1. History of TV History of Mass Communication
  2. 2. 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)
  3. 3. Paul Nipkow Nipkow Disk (1884)   A mechanical system that created a scanning effect when used with a beam of light,
  4. 4. 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
  5. 5. 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)
  6. 6. 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
  7. 7. 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