AirLive POE-100CAMv2 User Manual

Page 132

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AirLive POE100CAMv2 User’s Manual

131

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

network number or address, and some other part will represent the local machine address.