Axis Communications Security Camera 241Q User Manual

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AXIS 241Q/241S - Glossary
Glossary
Active Speaker - a speaker with a built-in power amplifier.
ActiveX - ActiveX is a standard that enables software components to interact with one another in a networked environment,
regardless of the language(s) used to create them. Web browsers may come into contact with ActiveX controls, ActiveX
documents, and ActiveX scripts. ActiveX controls are often downloaded and installed automatically as required.
AMC (AXIS Media Control) - AMC is the ActiveX component required to view moving images from an Axis video device in
Internet Explorer. The component is installed automatically on the viewing computer on first use. Once installed, AMC can
be configured from Windows Control Panel.
Analog video camera - The signal from an analog video camera is viewed directly on e.g. a monitor in the analog system,
which depends on traditional analog cabling. Alternatively, the signal can be digitized with the use of a video server, and
can then be made available over a data (IP) network.
ARP (Address Resolution Protocol) - This protocol is used to associate an IP address to a hardware MAC address. A request
is broadcast on the local network to discover the MAC address for an IP address.
ARTPEC-2 (Axis Real Time Picture Encoder) - A chip designed by Axis for image compression. ARTPEC supports a range of
CCD and CMOS sensors, built-in functionality for sharpening, backlight compensation, noise reduction and white balance,
support for multiple Motion-JPEG streams, support for MPEG-4 part 2, up to 30 frames/second from 4 simultaneous video
sources and real-time compression of up to 45 Megapixels/second.
ASIC (Application Specific Integrated Circuit) - A circuit designed for a specific application, as opposed to a general
purpose circuit, such as a microprocessor.
Aspect ratio - A ratio of width to height in images. A common aspect ratio used for television screens and computer
monitors is 4:3. High-definition television (HDTV) uses an aspect ratio of 9:16.
Autoiris (DC-Iris) - This special type of iris is electrically controlled by the camera, to automatically regulate the amount of
light allowed to enter.
AXIS Internet Dynamic DNS Service - This free service provides an Axis network product with a unique DNS or domain
name (URL address), which can then be used instead of an IP address to access the product from a web browser.
AXIS IP Utility - A tool for discovering and setting IP addresses for Axis network devices. AXIS IP Utility is supplied free of
charge by Axis.
AXIS Camera Management - A powerful and efficient installation and management tool for Axis network video products.
The tool can automatically find and set IP addresses, show connection status and manage firmware upgrades of multiple
devices.
Bitmap - A bitmap is a data file representing a rectangular grid of pixels. It defines a display space and color for each pixel
(or "bit") in the display space. This type of image is known as a "raster graphic". GIFs and JPEGs are examples of image file
types that contain bitmaps. Because a bitmap uses this fixed raster method, it cannot easily be rescaled without losing
definition. Conversely, a vector graphic image uses geometrical shapes to represent the image, and can thus be quickly
rescaled.
Bit rate - The bit rate (in kbit/s or Mbit/s) is often referred to as speed, but actually defines the number of bits/time unit and
not distance/time unit.
Bonjour - Also known as zero-configuration networking, Bonjour enables the automatic discovery of computers, devices,
and services on IP networks. Bonjour allows devices to automatically discover each other without the need to enter IP
addresses or configure DNS servers. Bonjour is developed by Apple Computer Inc.
BOOTP (Bootstrap Protocol) - A protocol that can automatically configure a network device (give it an IP address). BOOTP is
the basis for a more advanced network management protocol, the Dynamic Host Configuration Protocol (DHCP).
CCD (Charged Coupled Device) - This light-sensitive image device used in many digital cameras is a large integrated circuit
that contains hundreds of thousands of photo-sites (pixels) that convert light energy into electronic signals. Its size is
measured diagonally and can be 1/4", 1/3", 1/2" or 2/3".
CCTV (Closed Circuit Television) - A CCTV system is a closed/private video system, usually constructed with coaxial
cabling, and used within a single building/group of buildings. It is used to visually monitor the location for security or
industrial purposes. Video from the CCTV system can be recorded and viewed on-site or remotely.

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