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Nano

One-billionth.

National Television System Committee, NTSC

NTSC is the organization that formulated standards for the current U.S. color television system.  This system is used in most countries of the Americas and in other parts of the world.  It was designed to be compatible with the existing monochrome TV sets, so that they would not become obsolete.  Color televisions would also be able to receive monochrome transmissions.  NTSC uses a 3.579545 MHz subcarrier whose phase varies with the instantaneous hue of the televised color and whose amplitude varies with the instantaneous saturation of the color.  NTSC employs 525 lines per frame, 29.97 frames per second and 59.94 fields per second.

Network Protocol

The language a computer uses to communicate over a network. For a computer to communicate with another computer, they both must use the same protocol.

Noise

It is that in a cable or circuit, any extraneous signal which tends to interfere with the signal normally present in or passing through the system.

Noise Automatic Gain Control, NAGC

A noise eliminating circuit for detecting and eliminating a noise pulse component included in an amplitude modulated wave, characterized by a circuit arrangement wherein an output of a detector circuit which is adapted to receive an input signal from an IF stage is coupled to an input of a band-pass filter through a noise amplifier; an output of said band-pass filter is coupled to an input of a pulse generator circuit; an output of said pulse generator circuit is connected to a gate circuit for stopping an audio AGC control operation and a gate circuit for eliminating a noise; an output of said noise amplifier is connected to an AGC control circuit through said gate circuit for stopping the audio AGC operation in order to apply an audio AGC control signal to said noise amplifier; and an output of said band-pass filter is connected to said AGC control circuit in order to apply a noise AGC to said noise amplifier; whereby said pulse generator circuit generates a pulse in response to the detection of the noise signal when the level of the noise signal outputted from the band-pass filter exceeds a given level to trigger said gate circuit for stopping the audio AGC operation and said gate for the noise elimination.