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(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 In the U.S., the analog NTSC standard was superseded by the digital TV standard in 2009 (see digital TV transition and DTV).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.

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 ?
The OSTP interacts with other agencies through two principal mechanisms: management of the NSTC and participation with OMB in the budget development process.
To remove the above bottlenecks, it calls for integrating the business of the producers, the NSTC, related industries and specialized institutions into a tomato value system to reduce transaction costs for all stakeholders, boost efficiency, promote innovation and accelerate growth in productivity.
For example, the writer, in charge of music at the Sydney NSTC from 1974-78, had one full-time and two part-time assistants for a total of about 230 students.
The NSTC assessment warns that "because spawning grounds, migratory pathways, feeding habitats, and fishing grounds of important species are affected by the extent and duration of hypoxia," if it continues to expand, at some point "fisheries and other species would be expected to decline, perhaps precipitously.
Jukka Heikurinen, a forester at NSTC, is one of the players in one of the forestry success stories that have emerged.
The second CD-Rom, NSTC Series III, covers the period 1871 to 1919.
The NSTC initiative is designed "to focus on a few high priority, immediate impact reforms to implement.
The Office of Science and Technology Policy is working with summit organizers to archive on the NSTC website all feedback from the participants.
Implementation activities for the partnerships identified in the 1997 strategy were set forth in the NSTC Transportation Technology Plan, which was also developed by the NSTC Subcommittee on Transportation R&D and was released in November l998.
NSTC Series iii(1871-1919) will exist in CD-ROM form only: the first issue (June 1996) covers the letter 'A', the remainder will be issued over the following seven years.
The NSTC project aims to constitute a bibliography of all British, British empire, and American material published in the period 1801-1919 and which is held in the major British and US academic libraries.
NSTC will be on a scale of magnitude with the National Economic Council and the National Security Council and will take on much of the duties of the Federal Coordinating Council for Science, Engineering and Technology.