Quote:
Originally Posted by HDFootyMan
A typical HD channel takes up around x4 the bandwidth of a SD channnel. Even if you closed all the SD channels, its doubtful there would be enough bandwidth for a HD version of every SD channel - unless you start reducing the bitrate of those HD channels (in which case they become HD-lite).
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But newer standards eradicate this issue to some extent look on satellite at the change from DVB-S to DVB-S2.
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DVB-S2 achieves a significantly better performance than its predecessors – mainly allowing for an increase of available bitrate over the same satellite transponder bandwidth. The measured DVB-S2 performance gain over DVB-S is around 30% at the same satellite transponder bandwidth and emitted signal power. When the contribution of improvements in video compression is added, an (MPEG-4 AVC) HDTV service can now be delivered in the same bandwidth that supported an early DVB-S based MPEG-2 SDTV service only a decade before.
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Quote:
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The conversion process from DVB-S to DVB-S2 is being accelerated, due to the rapid increase of HDTV and introduction of 3D-HDTV
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http://en.wikipedia.org/w/index.php?...le_mobile_site