11 Facts About NTSC


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

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Since the introduction of digital sources the term "NTSC" might be used to refer to digital formats with number of active lines between 480 and 487 having 30 or 29.

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NTSC standard was used in most of the Americas, Myanmar, South Korea, Taiwan, Philippines, Japan, and some Pacific Islands nations and territories .

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NTSC standard has been adopted by other countries, including some in the Americas and Japan.

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Japanese NTSC never changed primaries and whitepoint to SMPTE "C", continuing to use the 1953 NTSC primaries and whitepoint.

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Backward compatibility with black-and-white television, NTSC uses a luminance-chrominance encoding system invented in 1938 by Georges Valensi.

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In NTSC, chrominance is encoded using two color signals known as I and Q in a process called QAM.

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The NTSC signal includes a short sample of this reference signal, known as the colorburst, located on the 'back porch' of each horizontal synchronization pulse.

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In CRT televisions, the NTSC signal is turned into three color signals called Red, Green and Blue, each controlling that color electron gun.

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Mathematically for NTSC this is relatively simple as it is only needed to duplicate every fourth frame.

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Use of NTSC coded color in S-Video systems, as well as the use of closed-circuit composite NTSC, both eliminate the phase distortions because there is no reception ghosting in a closed-circuit system to smear the color burst.

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