O que é DVB?

<div style="background-color: white; text-align: justify;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIequsF0AwDWV59PByKKuzPEdhaypYFHLHiXBPFFcD2Q_LQFPUE-p4HRgzMIF5GvW0No1mr_DrXwjOwa_FRgtsmEH-X2LsGFaXkd9oiRzH4qq6gakCdDVaxT9TTG730GLNgID8ULyrhj2S/s1600/DVB+Logo+para+o+Clube+da+Parab%C3%B3lica.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="161" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIequsF0AwDWV59PByKKuzPEdhaypYFHLHiXBPFFcD2Q_LQFPUE-p4HRgzMIF5GvW0No1mr_DrXwjOwa_FRgtsmEH-X2LsGFaXkd9oiRzH4qq6gakCdDVaxT9TTG730GLNgID8ULyrhj2S/s1600/DVB+Logo+para+o+Clube+da+Parab%C3%B3lica.png" width="200" /></a></div> <h2 style="line-height: 22.399999618530273px; margin-bottom: 0.5em; margin-top: 0.5em; text-align: start;"> <span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;">DVB é a sigla de </span><i style="font-family: Arial, Helvetica, sans-serif; font-size: medium; font-weight: normal;">Digital Video Broadcasting</i><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"> - (Transmissão de Vídeo Digital), às vezes chamado de </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;">televisão digital</span><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"> ou da sua sigla DTV (do inglês </span><i style="font-family: Arial, Helvetica, sans-serif; font-size: medium; font-weight: normal;">Digital Television</i><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;">).</span></h2> <h2 style="line-height: 22.399999618530273px; margin-bottom: 0.5em; margin-top: 0.5em; text-align: start;"> <span style="font-size: small; font-weight: normal;"><span style="font-family: Arial, Helvetica, sans-serif;">Conhecido como padrão europeu de TV Digital, foi projetado a partir dos anos 80 pelo consórcio que hoje possui 250 integrantes de 15 países. Desde 1998, está em operação no <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">Reino Unido</span>, tendo chegado a outros países da União Européia e à <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">Austrália</span>. Está previsto para ser implantado na <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">Índia</span>, na <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">Nova Zelândia</span> e cerca de outros 20 países. Detém um mercado atual de 270 milhões de receptores.</span></span></h2> <h2 style="margin-bottom: 0.5em; margin-top: 0.5em; text-align: start;"> <span style="font-size: small;"><span style="font-family: Arial, Helvetica, sans-serif;"><span style="font-weight: normal; line-height: 22.399999618530273px;">O padrão trabalha com conteúdo audiovisual nas três configurações de qualidade de imagem: </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-weight: normal; line-height: 22.399999618530273px;">HDTV</span><span style="font-weight: normal; line-height: 22.399999618530273px;"> (1080 linhas entrelaçadas), </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-weight: normal; line-height: 22.399999618530273px;">EDTV</span><span style="font-weight: normal; line-height: 22.399999618530273px;"> (576 linhas progressivas) e </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-weight: normal; line-height: 22.399999618530273px;">SDTV</span><span style="font-weight: normal; line-height: 22.399999618530273px;"> (576 linhas entrelaçadas). Nas duas últimas configurações, permite a transmissão simultânea de mais de um programa por canal, permitindo uma média de quatro. No início de sua implantação, apresentou dificuldades de recepção na </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-weight: normal; line-height: 22.399999618530273px;">Inglaterra</span><span style="font-weight: normal; line-height: 22.399999618530273px;">, sendo sujeito à interferência de ruídos de eletrodomésticos ou </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-weight: normal; line-height: 22.399999618530273px;">motores</span><span style="font-weight: normal; line-height: 22.399999618530273px;">.</span></span></span></h2> <h2 style="margin-bottom: 0.5em; margin-top: 0.5em; text-align: start;"> <span style="font-size: small; font-weight: normal; line-height: 22.399999618530273px;"><span style="font-family: Arial, Helvetica, sans-serif;">DVB é o padrão adotado pelas principais operadoras privadas de TV por assinatura por <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">satélite</span>. Em <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">Portugal</span> tem sido adaptado nos canais <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">pay-per-view</span> de televisão por cabo como alternativa ao sistema analógico.</span><span style="font-family: Arial, Helvetica, sans-serif;"><br /></span><span style="font-family: Arial, Helvetica, sans-serif;">DVB-T<span style="line-height: 1.5em;"> - Transmissões terrestres (</span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; line-height: 1.5em;">TV aberta</span><span style="line-height: 1.5em;"> em </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; line-height: 1.5em;">VHF</span><span style="line-height: 1.5em;"> ou </span><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; line-height: 1.5em;">UHF</span><span style="line-height: 1.5em;"> convencional); </span>O padrão DVB é designado de acordo com o serviço ao qual está vinculado:</span></span><ul style="line-height: 1.5em; list-style-image: url(data:image/png; margin: 0.3em 0px 0px 1.6em; padding: 0px; text-align: start;"> <li style="margin-bottom: 0.1em;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">DVB-S</span> - Transmissões por satélite (<span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">TV por assinatura</span> e <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">tv FTA</span>);</span></li> </ul> <ul style="line-height: 1.5em; list-style-image: url(data:image/png; margin: 0.3em 0px 0px 1.6em; padding: 0px; text-align: start;"> <li style="margin-bottom: 0.1em;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">DVB-C</span> - Serviço de <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">TV por cabo</span>;</span></li> </ul> <ul style="line-height: 1.5em; list-style-image: url(data:image/png; margin: 0.3em 0px 0px 1.6em; padding: 0px; text-align: start;"> <li style="margin-bottom: 0.1em;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">DVB-H</span> - Transmissão para dispositivos móveis, tais como <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">celulares</span> e <span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">PDA</span>'s;</span></li> </ul> <ul style="line-height: 1.5em; list-style-image: url(data:image/png; margin: 0.3em 0px 0px 1.6em; padding: 0px; text-align: start;"> <li style="margin-bottom: 0.1em;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">DVB-MHP</span> - Padrão de <i><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">middleware Multimedia Home Plataform</span></i>;</span></li> </ul> <ul style="line-height: 1.5em; list-style-image: url(data:image/png; margin: 0.3em 0px 0px 1.6em; padding: 0px; text-align: start;"> <li style="margin-bottom: 0.1em;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: normal;"><span style="background-attachment: initial; background-clip: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial;">IPTV</span> - Transmissão por IP através de uma rede privada.</span></li> </ul> <div> <span style="font-family: Arial, Helvetica, sans-serif; font-size: x-small;"><span style="font-weight: normal; line-height: 36px;">Retirado do <a href="http://pt.wikipedia.org/wiki/DVB" target="_blank">Wikipedia</a> - Adaptado.</span></span></div> </h2> </div>

O que é DVB?

DVB é a sigla de  Digital Video Broadcasting  - (Transmissão de Vídeo Digital), às vezes chamado de  televisão digital  ou da sua sigla ...

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