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Broadcast DTV

Bendov, Oded

Broadcast Engineering, 2013-05, Vol.55 (5), p.24

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Título:
Broadcast DTV
Autor: Bendov, Oded
Assuntos: Antennas ; Digital broadcasting ; Digital television ; Evaluation ; Receivers & amplifiers ; Spectrum allocation ; Systems design ; Television broadcasting
É parte de: Broadcast Engineering, 2013-05, Vol.55 (5), p.24
Descrição: To begin, one should wonder whether the headline scenario is possible. Should the industry even look into it? The answer is yes, it is possible. Why is the DTV Transmitter-Receiver link model, made up of a rooftop antenna connected to an ideal receiver, a path without multipath that ignores diffraction loss at the radio horizon and ground clutter loss all around? The simple answer is that this model, a relic of 1950s analog television, was the only way to satisfy (only on paper) the demand from some broadcasters that digital HDTV reception be extended to the then analog Grade B contour. It didn't take long to realize, experimentally and theoretically, that the ATSC standard was unsuitable for reliable reception by consumer devices with a rooftop antenna or even aided by DTS. We now have the opportunity to do it in a way that will promote the growth of free OTA DTV before it succumbs to other wireless competitors with advanced capabilities.
Editor: Overland Park: Endeavor Business Media
Idioma: Inglês

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