HTTP (Hypertext Transfer Protocol)
Protocol for transmitting data over a network.
GoP (Group of Pictures)
In MPEG video encoding, a group of pictures, or GoP, specifies the order in which intra-frames and inter-frames are arranged.
A system for setting the address of the camera remotely from the control system.
F-Number (aka Focal ration, f-ratio, f-stop, or relative aperture) in optics
The f-number of an optical system is the ration of the Len’s focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography.
DNS (Domain Name System)
An internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember.
DNR (Dynamic Noise Reduction)
Image noise is interference in the video signal that shows up as grainy specks. It can be caused by low lighting situation, a nearby power interference, heat, or device algorithms DNR is a technique of removing image noise from a video signal by applying a digital comb filter. It makes images clearer and reduces video file size.
DHCP (Dynamic Host Configuration Protocol)
Assigning dynamic IP addresses to devices on a network.
Term used to define the direction of data transmission between two parties. Half-duplex allows data transmission in both directions but not simultaneously. Full-duplex allows simultaneous data transmission.
DWD (Dust and Water proof Design)
Dust and Water proof Design
CIF (Common Intermediate Format)
Video format with 352 x 240/288 pixels.
CMOS (Complementary Metal-Oxide Semiconductor)
CMOS traditionally consumes little power. Implementing a sensor in CMOS yields a low-power sensor. CMOS chip can be fabricated on just about any standard silicon production line, so they tend to be extremely inexpensive compared to CCD sensors.
CCD (Charged Coupled Device)
CCDs use a special manufacturing process to create the ability to transport charge across the chip without distortion. This process leads to HQ sensors in terms of fidelity and light sensitivity. CCDs use a process that consumes lots of power. CCD consumes a much as 100times more power than an equivalent CMOS sensor. CCD sensors have been mass produced for a longer period of time, so they are more mature. They tend to have higher quality and more pixels.
BLC (Back Light Compensation)
In images where a bright light source is behind the subject of interest, the subject would normally appear in silhouette. BLC allows the camera to adjust the exposure of the entire image to properly expose the subject in the foreground. However, WDR is a more effective alternative to BLC because it handles multiple exposure zones to give both the highlight and low light areas a proper exposure.
Unit of measure for the speed of data transmission.
A technology that integrates motion detection into the camera allowing tracking an object and zooming in to optimize size and its perspective.