Color television

The early stages of color television experimentation in America overlap the technological development of monochromatic television. Color television was demonstrated by John Baird as early as 1928, and a year later by Bell Telephone Laboratories. Experimental color broadcasting was initiated in 1940, when the Columbia Broadcasting System (CBS) publicly demonstrated a field sequential color television broadcasting system. This system employed successive fields scanned one at a time in one of the three primary colors; red, blue, or green. On the receiver end, a mechanical color wheel was used to reconstitute the primary colors in sequence to enable reproduction of the colors in the original scene. In their 1941 report confirming the National Television Systems Committee (NTSC) monochromatic standards, the Federal Communications Commission (FCC) noted the potential benefits of the CBS color system but concurred with the NTSC assessment that color television required further testing before it could be standardized.
Further refinement of color television was temporarily suspended during World War II. After the war, work on the development of color TV resumed, and engineers were able to design a system that would operate within the 6 MHz channel allocation that had been established for black and white service. In a hearing which began 26 September 1949, and lasted for 62 days, CBS petitioned the FCC for commercialization of their 6 MHz, 405 line, 144 fields per second field sequential color system. Due to the higher scanning rate, such a system was not compatible with the existing monochromatic standard.
At the hearings, work on experimental electronic color system designed to be compatible with the existing monochrome system was presented to the commission. Color Television, Incorporated (CTI) demonstrated their line sequential color system which assigned the color portion of the signal to the successive lines of the image. In the first field, the uppermost line was scanned in green, the next line in blue, the next in red, and so on until the first field was complete. The second field was scanned in a similar manner, and the combination of the two fields produced a complete picture in color. The system operated at 525 lines, and 60 fields a second, corresponding to the existing monochrome service.
Examining the various proposed color systems, the FCC determined that the shortcomings of the compatible systems were fundamental and noted that if a viable alternative compatible system could not be developed, and the field-sequential color system was eventually adopted, the costs of modifying an even greater number of monochrome receivers would be prohibitive, denying the public of color service altogether. The commission therefore felt that it was unwise to delay the decision and on 10 October 1950, decided that the adoption of the color field-sequential system proposed by CBS was in the public interest. The CBS station in New York began regular color broadcasts on 25 June 1951. However, due to the military demands of the Korean War and the reallocation of resources towards the war effort, color receiver production could not be dramatically increased. On 19 October 1951, CBS discontinued color broadcasts due to the limited numbers of color receivers.
The NTSC, the entity which played a key role in setting monochrome standards in the United States, was reactivated to investigate the status of compatible color systems. On 21 July 1953 the second NTSC approved a compatible all electronic color television dot sequential system .On 17 December 1953 the FCC formally adopted a compatible color standard. After the color standard was set in 1953, broadcasting stations were fairly quick to upgrade their transmission facilities to provide for color programming. Of the 158 stations operating in the top 40 cities, 106 had adopted color capabilities by 1957. As late as 1965, CBS provided only 800 hours of color programming the entire year and ABC only 600 hours. In addition to the limited programming, early sets were somewhat cumbersome to adjust for proper color reception, receiver prices remained fairly high, and manufacturers were reluctant to promote color receivers until the lucrative black and white market had been saturated. Consequently, consumers were fairly slow to adopt color technology. As of 1965, only 10% of U.S. homes had a color set. It was not until the late 1960s, over a decade after the standard was set, that color TV sales rose significantly. Today, approximately 95% of all US homes have color television.