Axis Communications user manual Axis M3011 Glossary of Terms

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Glossary of Terms

ActiveX - 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.

Angle - The field of view, relative to a standard lens in a 35mm still camera, expressed in degrees, e.g. 30°. For practical purposes, this is the area that a lens can cover, where the angle of view is determined by the focal length of the lens. A wide-angle lens has a short focal length and covers a wider angle of view than standard or telephoto lenses, which have longer focal lengths.

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 (Axis Real Time Picture Encoder) - This chip is used for image compression, and image processing such as conversion of raw image sensor data, color correction, sharpening, noise filtering etc.

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.

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 devices to automatically discover each other on a network, without having to enter IP addresses or configure DNS servers. Bonjour is a trademark of Apple Computer, Inc.

Broadband - In network engineering terms, this describes transmission methods where two or more signals share the same carrier. In more popular terminology, broadband is taken to mean high-speed data transmission.

AXIS M3011 - Glossary of Terms

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".

CGI (Common Gateway Interface) - A specification for communication between a web server and other (CGI) programs. For example, a HTML page that contains a form might use a CGI program to process the form data once it is submitted.

CIF (Common Intermediate Format) - CIF refers to the analog video resolutions 352x288 pixels (PAL) and 352x240 pixels (NTSC). See also Resolution.

Client/Server - Client/server describes the relationship between two computer programs in which one program, the client, makes a service request from another program, the server, which fulfils the request. Typically, multiple client programs share the services of a common server program. A web browser is a client program that requests services (the sending of web pages or files) from a web server.

CMOS (Complementary Metal Oxide Semiconductor) - A CMOS is a widely used type of semiconductor that uses both negative and positive circuits. Since only one of the circuit types is on at any given time, CMOS chips require less power than chips using just one type of transistor. CMOS image sensors also allow processing circuits to be included on the same chip, an advantage not possible with CCD sensors, which are also much more expensive to produce.

Codec - In communications engineering, a codec is usually a coder/decoder. Codecs are used in integrated circuits or chips that convert e.g. analog video signals into a digital format for transmission. The codec also converts received digital signals back into analog format. A codec uses analog-to-digital conversion and digital-to-analog conversion in the same chip.

Codec can also mean compression/decompression, in which case it is generally taken to mean an algorithm or computer program for reducing the size of large files and programs.

Compression - See Image compression.

DC-Iris (Autoiris) - This special type of iris is electrically controlled by the camera, to automatically regulate the amount of light allowed to enter.

DHCP (Dynamic Host Configuration Protocol) - DHCP is a protocol that lets network administrators automate and centrally manage the assignment of Internet Protocol (IP) addresses to network devices in a network.

DHCP uses the concept of a ‘lease’ or amount of time that a given IP address will be valid for a computer. The lease time can vary, depending on how long a user is likely to require the network connection at a particular location.

DHCP also supports static addresses for e.g. computers running web servers, which need a permanent IP address.

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Contents Axis M3011 Network Camera Axis M3011 User’s Manual Contents Axis M3011 Key featuresAxis M3011 Ceiling Camera arrow Springs LED indicatorsOverview Color Indication LED indicatorsAxis M3011 Accessing the Camera Accessing the CameraAccess from a browser Access from the internet Setting the root passwordClick the Create self-signed certificate button Setting the root password over a secure connectionFocus Lens adjustmentsAxis M3011 Lens adjustments Axis Media Control toolbar Live ViewGeneral controls Axis M3011 Video Streams How to stream MPEG-4/H.264Video Streams Axis M3011 Video Streams Axis Media Control AMC Alternative methods of accessing the video streamMotion Jpeg Video Stream VideoAxis M3011 Video ImageStream Profiles Camera SettingsPrivacy mask Overlay ImageLayout Live View ConfigAxis M3011 Live View Config Viewer Settings Event Servers EventsEvent Types Axis M3011 EventsAxis M3011 Events Triggered Event How to set up a triggered eventPre-trigger and Post-trigger buffers HelpSettings Configuration exampleScheduled Event Camera TamperingMotion Detection Click Motion Detection in the Events menu Configuring Motion DetectionSecurity System OptionsAxis M3011 System Options UsersDate & Time Network Basic TCP/IP SettingsAxis M3011 System Options Broadband Natisp router Advanced TCP/IP SettingsAs the Internet. See the online help for more information QoS Quality of ServiceUPnP Smtp emailSnmp v1/v2 Traps for Snmp v1/v2Bonjour MaintenanceSupport Axis M3011 System Options Logs & Reports AboutAdvanced System Log Provides information about system eventsUsing the Control Button Resetting to Factory Default SettingsAxis M3011 Troubleshooting TroubleshootingEmergency Recovery Procedure Checking the FirmwareAxis M3011 Troubleshooting Axis Support Must obtain a new IP address and reinstall the unit Network administrator to obtain an appropriate IP addressARP/Ping commands Router to allow access to the cameraNot set to Decode only I frames Axis M3011 Technical Specifications Technical SpecificationsAlarm triggers Function/group Specification System ApplicationAlarm events Video access fromGeneral performance considerations Axis M3011 Glossary of Terms Glossary of TermsHalf-duplex See Full-duplex Etrax Ethernet Token Ring Axis Axis own microprocessorVOP See VOP Axis M3011 Glossary of Terms URL Uniform Resource Locator An address on the network ARP/Ping Bit Rate Bonjour Buffer Size Buffers Action Buttons 11 Administrator Alarm 26Axis M3011 Index