DVD glossary
- Nanometer (nm)
One thousandth of one micrometer or 0.0394
microinches. Equivalent to 10 Angstroms (Å).
- Non-Return-to-Zero (NRZ)
Bi-level digital code in which one level
represents a binary ONE and the other level represents a binary ZERO.
- Non-Return-to-Zero-Inverted (NRZ-I)
Bi-level digital code in which the levels are
changed by a binary NRZ ONE and remain unchanged by an NRZ ZERO.
- NPR
Non-Photoresist Mastering
method using a Laser Beam Recorder that employs an ablative process to write
onto a dye layer supported by a polished, optically flat glass substrate.
- NTSC
National Television Systems
Committee organized by the Electronic Industries Association
for the development of NTSC commercial television standards used in the United
States and also Canada, Japan, and other countries. Black-and-white TV uses a
scanning system of 525 lines at 60 fields per second. Color uses 525 lines at
59.94 fields per second with a 3.58 MHz color subcarrier.
- Numerical Aperture (NA)
Resolution or "spot" size of a lens. A small
spot is produced by a lens having a high numerical aperture achieved using a
large physical aperture and/or a short focal length. NA is equal to one-half
of the reciprocal of the f-stop.
Native
resolution
The resolution at which the video file was captured.
NTSC
NTSC stands for National Television System Committee, which devised the NTSC
television broadcast system in 1953. The NTSC standard has a fixed vertical
resolution of 525 horizontal lines stacked on top of each other, with varying
amounts of 'lines' making up the horizontal resolution, depending on the
electronics and formats involved. There are 59.94 fields displayed per second. A
field is a set of even lines, or odd lines. The odd and even fields are
displayed sequentially, thus interlacing the full frame. One full frame,
therefore, is made of two interlaced fields, and is displayed about every 1/30
of a second.
Numerical Aperture (NA)
A number that represents the lens aperture of a laser pick-up device. The
numerical aperture is a unitless measure of the light gathering capacity of the
lens system and determines its resolving power and depth of field. A vacuum has
NA of 1.0 by definition. The higher the number, the better.
NUON
NUON is the new media processor made by the VM Labs. NUON enhances the passive
elements of digital video products such as DVD Players, digital set top boxes
and digital satellite receivers, and transforms them into compelling interactive
video entertainment systems. The NUON technology allows hardware manufacturers
to replace their current media processors with a programmable, flexible solution
to make movies better, bring music to the big screen, Internet access and games
to the DVD Player. You can
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