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 Posted: Wed 8:30, 30 Mar 2011 Post subject: Real-time video transmission and IP network optimi |
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Real-time video transmission and IP network optimization
Slogans are retained, they called the In addition to Application of the Chinese People's Public Security Investigation Department of the University of cold Yun Chao Yang Yuzhu Abstract: Digital photography, digital memory as a storage device to replace film, darkroom equipment, computers and printers to replace the image processing and output devices as digital cameras and traditional cameras, the essential difference is: record different carriers, shooting different, shooting at different speeds, different storage media, input and output in different ways. Digital camera with real-time, easy storage, easy transfer of the advantages and ease of change, but also has a low resolution image, high prices, storage capacity is small, consecutive shooting poor shortcomings. Digital photography system configuration is the most basic digital cameras, computers, printers, three major equipment elements. Digital photography is widely used in criminal investigation, stop automatic shooting, fuzzy image processing, automatic identification and fingerprint identification technologies such as being. Key words]: digital camera; digital photography; public safety; application of traditional photographic technique is the use of sensitive optical technology and chemical technology, through the optical system to image projected onto photographic film, chemical technology to image fixed in the film, and through darkroom techniques to produce pictures. Digital photography, digital memory to replace film as a storage device, replace the darkroom equipment, computers and printers as image processing and output device. Digital photography is goodbye to the silver halide photographic film, darkroom equipment does not need to replace the photosensitive material digital storage, the final image by computer processing by the color printer output. First, what is also called a digital camera digital cameras digital cameras, the English described as Is a set of optical, mechanical and electronic technologies in one high-tech products. Digital camera is a real sense of the new non-film camera. Digital camera image information can be digitally stored on disk or memory card, the perfect integration of the image information conversion, storage, transmission and other components, with digital access mode, you can directly interact with the computer processing. The biggest advantage of digital cameras is its digital information, digital information can make use of the worldwide digital communications network for timely delivery,[link widoczny dla zalogowanych], so the camera can image the first real-time delivery. The core component of a digital camera charge-coupled device, also known as CCD image sensor, it is a high-speed semiconductor material, can light into electric charge, through the analog / digital converter into digital signals, digital signals are compressed by the camera internal flash memory or internal hard disk card save, you can enter data into computer processing, to achieve the digital office. Digital cameras use LCD, the special allocation of port numbers above. TCP / UDP port number to provide additional information that can be used for network switches, which form the basis for the exchange of the fourth floor. The fourth level of the exchange with the third layer and fourth layer of information in the packet header information, identify traffic based on the application range, the whole range of business segments assigned to the proper flow of the application server for processing. The fourth level of the exchange also requires end to end Qos, improve the exchange of the second and third floor received a packet of a packet of Qos transmission capacity. For example, a user from the high level business or important applications to network traffic, can be assigned to the fastest I / O system and cPu, these features can be effectively applied in real-time image transmission. Currently, the fourth layer switching technology has been in some of our switched network router or switch products are high-end applications in real-time image transmission through the application developers together to achieve the distribution of the data flow and flow priority control, so that real-time image transmission network service processing more efficient. Fourth, Postscript discussed above in the network to improve the quality of a variety of real-time optimization of image transmission channels for the comrades working in the relevant reference network in the construction or transformation of these factors should also be considered. Note that, we need to target specific network environment, taking realistic optimization measures, not through the optimization of each network in a specific city in a feasible and effective. Of real-time image transmission network multimedia applications, network resources will help us further develop and improve the level of computer communication applications;, in turn, stimulate the development of broadband networks, applications and building to form a virtuous circle. . 15.
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