History of Television

Transcript

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