NTSC color system

The current standard color system used in the United States, Canada, Mexico, Japan, and a few other countries.  The system has 525 horizontal lines and is named for the National Television Systems Committee.  See also PAL color system, SECAM color system.

National Television Systems Committee

See NTSC color system.


For developed black and white film, a negative has tonal values that are the opposite of those in the original photographed subject.  For developed color film, a negative has colors that are complements of the original photographed subject (e.g., red appears as green).  Broadly applies to negatives with and without sound, and separate negative optical tracks.

Negative picture

A film with either no sound or separate sound containing images that are either opposite with respect to black and white tonal values or are complementary with respect to colors from those in the original photographed subject.

Negative track

An optical sound track recorded on one edge of negative film stock that is paired with a  negative picture.

Negative work track

An optical sound track found on one edge of negative film stock that is used during the editing process and coordinates with the images in a work print.

Neopilotone synchronization

An analog recording of a sync signal usually in the center of a 1/4 in. audio tape so that the tape would be synchronized with a film image.


News film, edited with titles, music, and commentary, formerly seen regularly in theaters, but now no longer produced in the United States.

Nitrate film base

A highly flammable film base that has not been manufactured in the U.S. since 1952.  Nitrate base film was the industry standard for professional 35 mm. film until the introduction of triacetate in 1948.  See also Film base, Safety film base, Triacetate film base.

Nonanamorphic wide-screen

A film process that achieves the wide-screen effect without optically compressing the image or requiring the use of special projection techniques.  The image is wider than in the earlier standard aspect ratio of 1.33:1.  Typical aspect ratios are 1.66:1 and 1.85:1.  The image is expanded on a wide screen through the use of normal lenses and the appropriate aperture plate.

See also: