DVB-S2

From Biocrawler, the free encyclopedia.

DVB-S2 is a newer specification of the DVB-S (Digital Video Broadcasting) standard. Designers claim that DVB-S2 performance gains over DVB-S is circa 30%. Unlike DVB-S, it does not rely on MPEG-2 encoding alone, but allows more advanced encoding, like H.264 (a.k.a. MPEG-4 Part 10 or AVC) or VC-1.

Main features:

• DVB-S2 combines DVB-S (intented for final consumers) with DVB-DSNG (used by professionals),
• Adaptative coding to optimize the use of satellite transponders.
• 4 modulation modes are available : QPSK, 8PSK (used in non-linear transponders near to saturation); 16APSK and 32APSK (for professional, semi-linear applications).
• Improved rolloff: α = 0.20 and α = 0.25 in adition to the DVB-S α = 0.35.
• Forward error correction: DVB-S2 uses a FEC system based on concatenation of the Bose-Chaudhuri-Hochquenghem code with a low density parity check. Performance should be 0.7 dB close to the Shannon limit.
• Cheap to implement.

External link

• DVB-S2 white paper (final) (http://www.dvb.org/documents/white-papers/wp06.DVB-S2.final.pdf)

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) DVB-S2 (http://en.wikipedia.org/wiki/DVB-S2) version history (http://en.wikipedia.org/w/index.php?title=DVB-S2&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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