Nowadays, there exist a great number of technologies for displaying video information by means of display systems. Selecting one or another system, it is essential to determine the appropriate display technology, manufacturer and model, as well as the whole row of technical conditions, such as dimensions of the room, its lighting intensity, microclimate, electric power supply, number of users, etc. The choice of the particular equipment also depends on such factors as:
• The expected volume and speed of information updating;
• Required procedure and algorithm for information display;
• The character and type of video information, as well as the type of task performed;
• Possibilities of placing the blocks of information on the display systems;
• The demanded sequence and priority of displaying information blocks.
Selecting the sources and transducers, it is necessary to take into account not only the design decisions, but also the obtainment of the highest quality of sound and video. Still, basing on the foregoing, it is clear that the choice of sources and transducers is largely determined by the factors that are not technical in their nature, but strictly define the types and models of the equipment to be selected. Therefore, the problem of harmonizing these devices with each other for minimizing distortion and loss of signal quality almost entirely rests on the commutation system. Recently, the integral parts of the commutation system are specialized devices for its remote control, as soon as a large number and variety of equipment for commutation purposes only make it difficult to perform direct management and effective work through key control facilities. In addition, the vast majority of the contemporary control systems allow organizing the management the system through local networks and the Internet.custom essays
Additional features of video display systems for different purposes may include:
• Control of the image depending on the parameters of the external lighting;
• Automatic commutation of the audio signal in sync with the video one;
• High resolution recording of images from video display systems;
• Monitoring of the statuses of all the elements of the system, automatic notification on failures in the performance via telephone or e-mail;
• Built-in alarm system in cases of installing video display systems in public places;
• Accounting the resources of lamps, filters and other consumable items, automatic control of service regulations;
• Vandal-resistant functions or the options for outdoor installation with the protection from environmental damages.
Finally, it should be noted that at the each stage of equipment selection for the creation of a competitive solution, it is necessary to constantly consider the cost and complexity of the created system. On the other hand, excessive depreciation of the individual components can lead to the significant worsening of the parameters of the system as a whole. One of the decisive factors on the optimization of the projected video display system should be permanent work with the customer at the design stage, working out technical tasks and needs, as well as technical specifications of the system for the best results.
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