CLM HD8 - Projector Central
CLM HD8 - Projector Central
CLM HD8 - Projector Central
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Glossary<br />
GLOSSARY<br />
2:2 pull-down<br />
The process of transferring 24-frames/sec film format into video by repeating each frame (used for PAL DVD’s) as two video fields.<br />
(AD)<br />
3:2 pull-down<br />
Method used to map the 24 fps of film onto the 30 fps (60 fields) or 25 fps (50 fields), so that one film frame occupies three video<br />
fields, the next two, etc. It means the two fields of every other video frame come from different film frames making operations<br />
such as rotoscoping impossible, and requiring care in editing. Some sophisticated equipment can unravel the 3:2 sequence to<br />
allow frame-by-frame treatment and subsequently re-compose 3:2. The 3:2 sequence repeats every five video frames and four film<br />
frames, the latter identified as A-D. Only film frame A is fully on a video frame and so exists at one time code only, making it the<br />
editable point of the video sequence.<br />
Artefacts<br />
Undesirable elements or defects in a video picture. These may occur naturally in the video process and must be eliminated in<br />
order to achieve a high-quality picture. Most common in analog are cross color and cross luminance. Most common in digital are<br />
macroblocks, which resemble pixelation of the video image.<br />
Aspect ratio<br />
Relation between the horizontal & vertical dimension in which the window will be displayed, e.g. 4 by 3 or 16 by 9. Can also be<br />
expressed as a decimal number, such as 1.77. The larger the ratio or decimal, the wider are less square the image.<br />
Color space<br />
A color space or color standard is a mathematical representation for a color. For example the RGB color space is based on a<br />
Cartesian coordinate system.<br />
Color temperature<br />
The coloration (reddish, white, bluish, greenish, etc.) of white in an image, measured using the Kelvin (degrees K) temperature<br />
scale. Higher temperatures output more light.<br />
Common address<br />
<strong>Projector</strong> will always execute the command coming from a RCU programmed with that common address.<br />
Default Gateway<br />
A router that serves as an entry point into and exit point out of a network. For example, a local network (LAN) may need a gateway<br />
to connect it to a wide area network (WAN) or to the Internet.<br />
DHCP<br />
Dynamic host configuration protocol. DHCP is a communications protocol that lets network administrators manage centrally and<br />
automate the assignment of IP addresses in an organization’s network. Using the Internet Protocol, each machine that can connect<br />
to the Internet needs a unique IP address. When an organization sets up its computer users with a connection to the Internet,<br />
an IP address must be assigned to each machine. Without DHCP, the IP address must be entered manually at each computer<br />
and, if computers move to another location in another part of the network, a new IP address must be entered. DHCP lets a network<br />
administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer<br />
is plugged into a different place in the network.<br />
DMX<br />
DMX-512 Lighting protocol over RS-485 interface. Carries information of 512 channels from a lighting controller to lighting devices.<br />
Standardized by USITT.<br />
HDCP<br />
High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to protect digital<br />
audio and video content as it travels across DisplayPort, Digital Visual Interface (DVI), High-Definition Multimedia Interface (HDMI),<br />
Gigabit Video Interface (GVIF), or Unified Display Interface (UDI) connections. The specification is proprietary, and implementing<br />
HDCP requires a license.<br />
HEPA<br />
High Efficiency Particulate Absorbing<br />
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