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videosurveillance.com
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Definitions (31)
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image compression
Image compression reduces the file size of video images to optimize bandwidth while streaming surveillance footage. The most common compression technologies for IP network cameras are Motion JPEG and MPEG-4. H.264 is the latest compression technology that significantly reduces the file size of high-quality video images.
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Auto-Iris Lens
With an auto-iris lens, the iris is controlled automatically to regulate the amount of light entering the camera. This is ideal for camera installations in outdoor locations, high-contrast situations, and areas where lighting conditions fluctuate.
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CCD Image Sensor
A CCD image sensor is a light-sensitive image device available in many IP network cameras. The sensor transforms light into electronic signals. CCD sensors provide strong light sensitivity allowing for video surveillance in low-light conditions.
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CCTV
CCTV (or closed-circuit television) refers to the use of analog surveillance cameras to submit a video signal to a specific set of monitors. Since a CCTV system is closed, only a limited number of viewers can access the footage from a single location. With the arrival of IP-based surveillance, analog CCTV systems are now being superseded by improve [..]
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Ethernet
Ethernet is a standard technology for network communications in LANs (Local Area Networks). Ethernet LANs use twisted pair cabling, with network devices connecting to a central cable or hub. The most common Ethernet systems are 10BASE-T and 100BASE-T10, which transmit data at speeds of 10 Mbps and 100 Mbps.
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field of view
The field of view represents the complete area of coverage provided by a network camera when viewed at full frame. Field of view can be determined by camera type, lens, and image resolution.
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FTP
FTP (File Transfer Protocol) is a network protocol used to transfer files from one computer to another, or between devices on the network. An FTP client can connect to an FTP server to access and manipulate the files stored on that server.
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JPEG
JPEG is a method of compression for photographic images. The amount of compression can be controlled to allow for a tradeoff between image quality and file size. JPEG is the most commonly used format for storing and sending images over the internet.
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IP
IP (Internet Protocol) is a connectionless protocol used for transmitting data over a network. Data is divided into independent packets containing the IP address of both the sender and the recipient. Each computer or network device has its own unique IP address.
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ip address
An IP address is the unique address of a computer or network device connected to that network. IP addresses allow those network computers and devices to locate each other and transfer data back and forth.
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