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AXIS 214 PTZ
VOP (Video Object Plane) - A VOP is an image frame in an MPEG-4
video stream. There are several types of VOP:
- An I-VOP is complete image frame.
- A P-VOP codes the differences between images, as long as it is more
e
fficient to do so. Otherwise it codes the whole image, which may also
be a completely new image.
WAN (Wide-Area-Network) - Similar to a LAN, but on a larger
g
eographical scale.
WLAN (Wireless LAN) - A wireless LAN is a wireless local area
ne
twork that uses radio waves as its carrier: where the network
connections for end-users are wireless. The main network structure
usually uses cables.
Web server - A web server is a program that allows web browsers to
re
trieve files from computers connected to the Internet. The web
server listens for requests from web browsers and, upon receiving a
request for a file, sends it back to the browser.
The primary function of a web server is to serve pages to other remote
c
omputers; consequently, it needs to be installed on a computer that
is permanently connected to the Internet. It also controls access to the
server, whilst monitoring and logging server access statistics.
WEP (Wireless Equivalent Privacy) - A wireless security protocol,
spe
cified in the IEEE 802.11 standard, which is designed to provide a
WLAN (Wireless Local Area Network) with a level of security and
privacy comparable to that usually expected of a wired LAN. Security
is at two different levels; 40-bit and 128-bit encryption. The higher
the bit number, the more secure the encryption.
WINS (Windows Internet Namin
g Service) - Part of the Microsoft
Windows NT Server, WINS manages the association of workstation
names and locations with IP addresses, without the user or
administrator having to be involved in each configuration change.
WPA-PSK (Wi-Fi Protected Acces
s - Pre-Shared Key) - This
wireless encryption method uses a pre-shared key (PSK) for key
management. Keys can usually be entered as manual hex values, as
hexadecimal characters, or as a Passphrase. WPA-PSK provides a
greater degree of security than WEP.
Zoom lens - A zoom lens can be moved (zoomed) to enlarge the view
o
f an object to show more detail.