JPEG2000 compression
2010-01-14 01:06:03
JPEG2000 compression - upgraded and more sophisticated form of JPEG standard. The primary advantage of JPEG 2000 is a slightly better image quality at the same degree of compression. In addition, unlike JPEG, the image can be compressed lossless, which is an alternative to standard PNG format. The disadvantage of the JPEG 2000 algorithm is the large computational complexity, therefore, is not expected to replace the JPEG standard. Because of the need to pay a fee to use this standard, its application in IP networks is
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HICAP is a card
2010-01-13 21:58:14
Depending on the type of compression depending on the amount of disk space required:
Disk capacity, Wavelet compression MJPEG compression
10 GB 4.5 hours. 9 hrs.
40 GB of 18.0 hours. 36.0 hrs.
80 GB 36.0 hours.
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Used connectors
2010-01-13 19:37:26
Used connectors. An important feature of the monitors is having beyond the entrance and exit of vision. BNC connectors are used, sometimes with a smaller diagonal monitors cinch connectors. Output current vision is the same signal as the input. If the vision is starting to be connected
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Commonly used two types of coaxial cable
2010-01-13 17:47:44
It consists of two concentric wires placed one inside another, which ensures greater resistance to interference and thus improve transmission quality. One of them is made in the form of copper wire or rope and placed in the axis of the cable (sometimes called a hot wire) and second (screen) is a braid.
Commonly used two types of coaxial cable - a characteristic impedance of 50 and 75 ohms, which were first used, inter alia, computer networks. Application were two types of coaxial cables: Thin Ethernet (Thin Ethernet) - (network-type
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Attacks from inside the network
2010-01-08 17:11:00
Attacks from inside the network are one of the more dangerous. Intrusion occurs from inside the local network by using a user account, or vulnerabilities in the system user authorization. Most of this type are burglary involving employees of the company, rather than computer users outside its precincts, since access to the terminal networks such person is rarely noticed.
1.1.3. Indirect attacks.
Hackers use here a rather sophisticated method, as exemplified by Trojan horses. This group
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