can moving images and radio broadcasting be brought together?

theorized a system for sending pictures by wire

developed a transmission system that could send handwriting and simple pictures over telegraph wires

develops the first mechanical television

obtained a license from the BBC in 1926 to do experimental broadcasting

Electronic Television

Westinghouse employee

develops a cathode ray tube - an "iconoscope"

Westinghouse isn't interested

why?

Zworykin ends up at RCA

sketches a plan for an electronic television

60 lines of resolution

1930 - RCA puts W2XBS on the air as an experimental station

Farnsworth licenses patents to RCA

Note: Germany begins regular broadcasting (180 lines of resolution)

1939 - RCA displays TV for the general public at the World's Fair

441 lines of resolution

(VHF - very high frequency)

standards are set

National Television Systems Committee (NTSC)

B/W, 525 lines of resolution, 4:3 aspect ratio, FM sound

Note: 1953 - NTSC approves a color standard

Television Networks

NBC and CBS move in

Dumont 1946-1955

ABC in 1948

set sales increase 500% over 1947

TV set to boom

why?

Note: in 1951 TV sets outsell radio sets

fast diffusion?

1951 - first intercontinental television transmission

adds 70 UHF channels (ultra high frequency)

should a market get all VHF, all UHF, or a mix?

intermixture

average market got 2-3 VHF, 5-6 UHF

UHF at a disadvantage

higher costs, poor signal, smaller coverage area, lack of affiliation

and, a standard TV needed a converter to tune in UHF

VHF licenses get snapped up, UHF mostly unclaimed

1962 All Channels Receiver Act

by 1990 - 550 UHF, 549 VHF

Impact on Radio

programming?

impact?

is this the end?

mid-1980s, AM finds a new format

Impact on Film