If multimedia is regarded as the high technology of information processing and display, then the information highway is the high technology and equipment of information transmission matched with multimedia, that is, network channel. Because it transmits information with wide channel, large capacity, high speed and other characteristics, and also transmits information at high speed, in large quantities and in parallel, just like the highway allows many vehicles to pass at the same time, people call it the information highway.
The expressway can be connected into a network, and the information expressway is also a large capacity information transmission network. The official name of the information superhighway is the National Information Infrastructure (NII). Its clear definition is: "The national information infrastructure is a complete network composed of communication networks, computers, databases and daily electronic products that can provide users with a large amount of information." Its broad sense includes the constantly developing types of equipment, its information sources are diverse, with a large number of application systems and software, systematic network standards and transmission codes, And the people involved in developing their potential. The information superhighway can connect the telephone, cable TV, banking, and many activities to form a huge electronic network, and can provide any electronic communication needed by individuals.
The information highway can be used to realize long-distance communication, teaching, shopping, video conference, medical diagnosis, on-demand movies, etc. An information highway can end the isolation of remote villages, greatly increase people's access to education and medical services, financial information and employment opportunities, enable children of nomadic tribes to receive education at home, and enable workers to learn new skills without going to the factory; In countries with a shortage of medical personnel, high-quality medical services can be delivered to villages with poor transportation; It can also reduce environmental pollution, enable the decision-making level to obtain information quickly, and help to strengthen regional links.
The information superhighway is based on modern computer network and communication technology, and provides various services to the whole country and even the world through laying optical fiber cables. The optical fiber cable is composed of slender glass bundles, which can transmit digital information in the form of laser pulses, while the coaxial cable transmits radio waves. The laser pulse is shorter than the wavelength of the radio wave, so the information capacity of the optical fiber line is large. For example, a single optical fiber can simultaneously transmit 5000 video signals or 500000 telephone calls. The optical cable has strong anti-interference ability, reduced signal attenuation, and is suitable for long-distance transmission of the most important information. The current information network is a computer information network system. Most of the communication lines used are ordinary telephone lines. It takes 13 hours to transmit 33 volumes of Encyclopedia Britannica via this network. When this network is connected by optical cable and combined with multimedia technology to form an information highway, it will only take 4.7 seconds to transmit the same "whole book", and the speed will be increased by about 10000 times.
Website Design It is closely related to the construction of information superhighway. The construction of information superhighway is an indispensable part of the military Internet, with infinite charm and development prospects. Once the battlefield information superhighway is completed, it will be an information system covering the entire war zone, consisting of communication intelligence networks, computers, battlefield databases and various user terminals. It can not only transmit voice, charts, words, numbers and other information to users, It can also provide users with a battlefield image depicted by the battlefield shared database (including friendly configuration situation, enemy situation, combat readiness, logistics, environment, etc.), which can change accordingly with the movement of troops on the battlefield, so that commanders can not only quickly obtain or transmit relevant information, but also grasp the actual situation of the whole battlefield at any time. The system will greatly expand the use range of military and commercial satellites, integrate various mutually isolated tactical data communication networks, and provide long-distance radio communication means.
The information superhighway is a grand project spanning the century. Its realization not only plays a powerful role in promoting the development of military and national economy, but also has an immeasurable impact on people's work, study and lifestyle, even the entire human society. At the beginning of 1993, the United States formally proposed the plan to build the information highway, which is expected to be completed in 20 years, with a total investment of 400 billion dollars. Vice President Al Gore of the United States commented on the information superhighway in this way: in human history, guns have changed the human war mode only for a few hundred years, and television has linked the world for less than] 00 years. Just as guns and television have brought mankind into the 20th century, the information superhighway will bring us into the next century and completely change our way of study, work and life.
