NTSC

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NTSC

NTSC

(National TV Standards Committee) The first television standard for the U.S., which was also adopted by Canada, Japan, South Korea and several Central and South American countries. In the U.S., the analog NTSC standard was superseded by the digital TV standard in 2009 (see digital TV transition and DTV).

From Monochrome to Color
NTSC commercial broadcasting began in the U.S. for black and white TVs in the summer of 1941. A subcarrier frequency was later developed to transmit color alongside the monochrome signal, and color TV debuted on January 1, 1954 (see composite video). Before electronic TV became a standard, prototype electromechanical systems produced the first, crude video images (see video/TV history).

NTSC Specifications
Administered by the FCC, NTSC broadcast 60 half frames per second, which is known as 60 "fields" per second in TV jargon (59.94 fields per second to be exact). NTSC used 525 lines of interlaced resolution (two 262.5-line half frames). The last 21 lines in each half frame were the "vertical blanking interval" (VBI), which gave the electron gun in the CRT time to reposition itself from the bottom of the last frame to the top of the next. See interlace and raster scan.

The digital video (DV) camcorder format that is equivalent to NTSC is 720x480 pixels (see DV). The digital TV equivalent is 704x480 pixels (see DTV).

NTSC was encoded in the YUV color space, which provides a mathematical equivalent of red, green and blue. It also includes an audio FM frequency and an MTS signal for stereo. See NTSC DVD, YUV, YIQ, 4fSC, vertical blanking interval, aspect ratio, DTV, PAL and SECAM.


An NTSC TV Set
This TV set picked up the first NTSC TV signal, which was broadcast in the U.S. in 1941. The signal was monochrome. In 1954, the new NTSC standard added color using a composite video signal. (Image courtesy of www.TVhistory.TV)







Inside a TV?
Hard to imagine, but this rotating disc was the heart of the first TV camera and receiver, which predated the all-electronic systems such as NTSC. For an overview, see video/TV history. (Image courtesy of www.TVhistory.TV)
References in periodicals archive ?
American and Dutch companies are working on high-definition systems (approaching 1,050 lines of resolution) which will be compatible with existing NTSC standards and equipment.
The latter give viewers a picture quality equivalent to that of the current NTSC standard.
The new ATI FirePro Synchronization Module supports four professional graphics cards, features a modern Serial ATA power connector and allows ATI FirePro graphics accelerators to receive signals and synchronize to virtually any video input source, including PAL and NTSC standard definition video black burst, high definition TV tri-level, TTL and SDI sync.
Backlighting RGB systems are designed to backlight secondary optics, displays, or signage--providing a color gamut greater than the NTSC standard.
Projectors illuminated by PhlatLight LEDs produce more than fifty percent wider color gamut than the NTSC standard and the pure, primary colors sequentially pulsed at high speeds, provide ultra-fast color refresh for stable, accurate colors and a smooth picture with superior motion quality.
The panel, using an LED backlight, reproduces 92 percent of the NTSC standard for color saturation and features low power consumption of 90 watts or less.
The AVT, audio-visual-with-tuner version builds off of the IT and AV functionality with an ATSC HD tuner and an NTSC standard definition tuner, and has RF inputs that accept HD and SD TV signals
Color saturation is normally expressed as a ratio, with the NTSC standard being 100%.
By combining the RGB light emissions from the backlight in precise sequences, the new LCD panel provides color saturation that is 110% of the NTSC standard, while the aperture ratio is an exceptionally high 78% for television with brightness at 500nit.
The resulting image is exceptionally crisp and vibrant, with brightness of 500 nits (cd/m(2)), a contrast ratio of 8000:1 and 92% color gamut for the NTSC standard.
7 million shades (24-bit color) Max Brightness 600 candela Contrast Ratio 1,200:1 Color Saturation 92% of NTSC standard Liquid Crystal Response Time 8ms (at maximum) Viewing Angle 180 degrees (all directions) Module Size 1,875mm x 1,080mm x 45mm