Informing the population in case of extraordinary events by means of digital video broadcasting – terrestrial
| Autor: | David Rehak, Pavel Senovsky |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Safety and Security Engineering V. |
| ISSN: | 1743-3509 1746-4498 |
| DOI: | 10.2495/safe130121 |
| Popis: | Timely and clearly transmitted information about the nature of threats is a basic tool to assist the minimization of consequences of extraordinary events from the point of view of both prevention of loss of life (e.g. in a form of evacuation) and minimization of damage to property (i.e. by implementing protective measures in the threatened area). Informing the population is realized in many available ways and by many available means, e.g. by nationwide networks of television and radio stations, by public address systems in towns, municipalities and facilities or by portable public address devices. However, a significant problem emerges in the course of evaluation of efficiency of these means especially in the area of audibility and intelligibility. The aim of the article is the presentation of a new way of informing the public in the course of extraordinary events using the existing DVB-T infrastructure. For this way of informing, an appropriately equipped broadcasting station and installation of an encoder between the broadcasting station and a multiplexer are necessary. The stated solution thus will make it possible to add information in voice to TV or radio broadcasting. This information then can be received by television (after adding an additional decoder) and radio receivers, which provides the high intelligibility of transmitted information. |
| Databáze: | OpenAIRE |
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