60AXIS 210/210A/211/211A - Glossary of Terms
Glossary of Terms
Active Speaker - a speaker with a
ActiveX - A control (or set of rules) used by a browser. ActiveX controls are often downloaded and installed automatically as required.
ADPCM - Adaptive Differential Pulse Code Modulation. Predicts the analog signal digitally and the difference is coded.
AMC - AXIS Media Control. The control required for viewing video images in Internet Explorer for Windows. Installs automatically on first use.
API - Application Programming Interface. The Axis API can be used for integrating Axis products into other applications.
ARP - Address Resolution Protocol. A protocol for assigning an IP address to a physical device address that is recognized in the local network. The ARP command can be used to set the
ARTPEC - Axis Real Time Picture Encoder - used for video image compression.
CCD - Charge Coupled Device. CCD is one of the two main types of image sensors used in digital cameras. When a picture is taken, the CCD is struck by light coming through the camera’s lens. Each of the thousands or millions of tiny pixels that make up the CCD convert this light into electrons.
CGI - Common Gateway Interface. A set of rules (or a program) that allows a Web Server to communicate with other programs.
Client/Server - Describes the network relationship between two computer programs in which one, the client, makes a service request from another - the server.
dB (Decibels) - A unit to measure sound level changes. A 3dB change is the smallest level change we can hear. A 3dB change is actually twice or half the audio power level. A gain of 0dB will leave the signal level unchanged.
DNS - The Domain Name System (DNS) locates and translates Internet domain names into IP (Internet Protocol) addresses.
Ethernet - A widely used networking standard. ETRAX - Axis' own microprocessor.
Firewall - A virtual barrier between a LAN (Local Area Network) and other networks, e.g. the Internet.
FTP - File Transfer Protocol. Used for the simple transfer of files to and from an
Full duplex - Transmission of data, e.g. audio, in two directions simultaneously.
G.711 - G.711 is the international standard for encoding telephone audio on 64 kBit/s channel. It is a pulse code modulation (PCM) scheme operating at 8 kHz sample rate.
G.726 - Frequently used
Half duplex- A half duplex link can communicate in only one direction, at a time. Two way communication is possible, but not simultaneously.
HTML - Hypertext
HTTP - Hypertext Transfer Protocol. The set of rules for exchanging files (text, images, sound, video, and other files) on the World Wide Web.
HTTPS - Hypertext Transfer Protocol over Secure Socket Layer. A web protocol that provides encryption for page requests from users and for the pages returned by the web server.
Intranet - A private network limited to an organization or corporation. Usually closed to external traffic.
IP -
IP address - A unique number used by a network device, to allow it to be identified and found on the network. The
ISMA - Internet Streaming Media Alliance
JPEG - A standard image format, used widely for photographs. Also known as JPG.
LAN - A local area network (LAN) is a group of computers and associated devices that typically share common resources within a limited geographical area.
Linux - A popular operating system, which is “open source” and practically free of charge.
Lux - A standard unit for the measurement of light, where 1 Lux equals the light emitted from a single candle at a distance of one meter.
Mbit/s - Megabits per second. A unit for measuring speeds in networks. A LAN might run at 10 or 100 Mbit/s.
Multicast - The same information is sent only once and only to the intended recipients.
NTSC - National Television Standards Committee. NTSC is the standard format used for televisions in most of North and Central America, and Japan.
