InFocus Genesis P130, Руководство по введению, Страница: 61 / 82

61
infocus.com
Glossary
Term Description
Maximum
Resolution
Maximum Resolution refers to the highest resolution that a given display device can support. If
the Maximum Resolution exceeds the Native Resolution, the image is usually scaled to match or
approximate the Native Resolution of the projector. Some display devices allow pan and scan where
rather than scaling the image, the display devices allows you to use the native resolution of the display
to view portions of the higher resolution image. Scaling reduces the image resolution and produces
some artifacts in the image that are more apparent when viewing text than graphics or video.
Memory Card A feature on some projectors that allows photos, documents and/or presentation material to be
projected using a memory card and thereby eliminating the need of a computer.
MHL (Mobile
High-Definition
Link)
Mobile High-Definition Link (MHL) is an industry standard for a mobile audio/video interface that
lets you connect mobile devices such as smartphones and tablets to projectors and other HD video
displays. MHL is a consortium made up of major companies in the consumer electronics industry,
including SONY, Nokia, Samsung, Silicon Image, and Toshiba.
MHz Megahertz. One million hertz or cycles per second.
Minimum
Distance
The closest position that a projector can focus an image onto a screen.
Monitor
Loopthrough
An output on the projector or large-screen monitor that allows you to connect additional monitors or
projectors to display the same image. Also known as "RGB out" or "VGA out."
Mono Single channel sound.
Motion Artifacts Any artifact caused by camera panning or object movement within video. Judder and combing are
motion artifacts.
MPEG Moving Picture Experts Group. A working group of ISO/IEC in charge of developing codecs and
standards for moving pictures with synchronized audio.
Multi-Lamp Some projectors use multiple lamps that can be controlled by the user to increase or decrease the
brightness of the image. This lamp redundancy significantly minimizes the risk of total lamp failure
during use. Another type of multi-lamp system is a Dual Lamp. With a dual lamp projector one lamp
can serve as a backup to the other lamp in the event of failure or the lamps can be programmed to
switch at specific intervals.
Native Aspect
Ratio
Nearly every projector or display today will support multiple aspect ratios; however, each manufacturer
must decide who their intended audience is and optimize the projector for that audience. This means
each device has a native aspect ratio that is optimized for specific viewing material. Images shown
in native aspect ratio will utilize the entire resolution of the display and achieve maximum brightness.
Images shown in other than native aspect ratio will always have less resolution and less brightness
than images shown in native aspect ratio.
Native
Resolution
Native Resolution is the number of physical pixels in a display device. For example, an XGA display
has a native resolution of 1024 physical pixels of resolution horizontally and 768 pixels vertically or
786,432 total pixels. See Maximum Resolution.
Negative Gain
Screen
A screen with a gain rating of under 1 which actually reduces the amount of light reflected back from
a projected image. Usually gray, they are used to increase apparent contrast by lowering the black
level.
Noise An unwanted random signal.
NSH New Super High pressure projector lamp is a short arc metal halide lamp.
NTSC National Television Standards Committee. Established the first colour TV standard in 1953 and is
the North American standard for video and broadcasting. Also used in the Caribbean, South Korea,
Japan and South America. A 30 fps signal with 525 lines of resolution of which 480 to 483 are
viewable. Transmitted via a 6MHz channel.
Glossary