System clock not updating

Technical advancements of the vestigial side band technique allowed for the opportunity to increase the image resolution.

The NTSC selected 525 scan lines as a compromise between RCA's 441-scan line standard (already being used by RCA's NBC TV network) and Philco's and Du Mont's desire to increase the number of scan lines to between 605 and 800.

The National Television System Committee was established in 1940 by the United States Federal Communications Commission (FCC) to resolve the conflicts that were made between companies over the introduction of a nationwide analog television system in the United States.

In March 1941, the committee issued a technical standard for black-and-white television that built upon a 1936 recommendation made by the Radio Manufacturers Association (RMA).

The precise frequency was chosen so that horizontal line-rate modulation components of the chrominance signal would fall exactly in between the horizontal line-rate modulation components of the luminance signal, thereby enabling the chrominance signal to be filtered out of the luminance signal with minor degradation of the luminance signal.

Due to limitations of frequency divider circuits at the time the color standard was promulgated, the color subcarrier frequency was constructed as composite frequency assembled from small integers, in this case 5×7×9/(8×11) MHz.

In 1953 a second NTSC standard was adopted, which allowed for color television broadcasting which was compatible with the existing stock of black-and-white receivers.

) are drawn in the first field, and the odd-numbered (every other line that would be odd if counted in the video signal, e.g.After nearly 70 years, the majority of over-the-air NTSC transmissions in the United States ceased on January 1, 2010, After a pilot program in 2013, most full-power analog stations in Mexico left the air on ten dates in 2015, with some 500 low-power and repeater stations allowed to remain in analog until the end of 2016.Digital broadcasting allows higher-resolution television, but digital standard definition television continues to use the frame rate and number of lines of resolution established by the analog NTSC standard.The first color NTSC television camera was the RCA TK-40, used for experimental broadcasts in 1953; an improved version, the TK-40A, introduced in March 1954, was the first commercially available color television camera.Later that year, the improved TK-41 became the standard camera used throughout much of the 1960s.

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