AirLive
POE
‐
200CAMv2
User’s
Manual
110
IEEE 802.11 -
A family of standards for wireless LANs. The 802.11 standard supports 1 or 2 Mbit/s transmission on the
2.4 GHz band. IEEE 802.11b specifies an 11 Mbit/s data rate on the 2.4 GHz band, while 802.11a allows
up to 54 Mbit/s on the 5 GHz band.
Image compression -
Image compression minimizes the file size (in bytes) of an image. Two of the most common compressed
image formats are JPEG and GIF.
Interlacing -
Interlaced video is video captured at 50 pictures (known as fields) per second, of which every 2
consecutive fields (at half height) are then combined into 1 frame. Interlacing was developed many
years ago for the analog TV world and is still used widely today. It provides good results when viewing
motion in standard TV pictures, although there is always some degree of distortion in the image.
To view interlaced video on for example, a computer monitor, the video must first be de-interlaced, to
produce progressive video, which consists of complete images, one after the other, at 25 frames per
second. See also
Progressive scan
.
IP (Internet Protocol) -
The Internet Protocol is a method transmitting data over a network. Data to be sent is divided into
individual and completely independent "packets." Each computer (or host) on the Internet has at least
one address that uniquely identifies it from all others, and each data packet contains both the sender's
address and the receiver's address.
The Internet Protocol ensures that the data packets all arrive at the intended address. As IP is a
connectionless protocol, which means that there is no established connection between the
communication end-points, packets can be sent via different routes and do not need to arrive at the
destination in the correct order.
Once the data packets have arrived at the correct destination, another protocol - Transmission Control
Protocol (TCP) - puts them in the right order. See also
TCP
.
IP Address -
An IP address is simply an address on an IP network used by a computer/device connected to that
network. IP addresses allow all the connected computers/devices to find each other and to pass data
back and forth.
To avoid conflicts, each IP address on any given network must be unique. An IP address can be
assigned as fixed, so that it does not change, or it can be assigned dynamically (and automatically) by
DHCP.
An IP address consists of four groups (or quads) of decimal digits separated by periods, for example,
130.5.5.25. Different parts of the address represent different things. Some part will represent the
