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DVB-S2X is an extension of DVB-S2 satellite digital broadcasting standard. DVB-S2X is a digital satellite television broadcast standard. It has been standardised by (DVB Project ) in March 2014 as an optional extension of DVB-S2 standard.〔(【引用サイトリンク】url=http://www.dvb.org/standards/dvb-s2x )〕 It will also become an ETSI standard. == Main features == Compared to DVB-S2, efficiency gains up to 51% can be achieved with DVB-S2X.〔(【引用サイトリンク】url=http://www.newtec.eu/article/whitepaper/dvb-s2x-demystified )〕 Amongst improvements are: *Higher Modulation Schemes (64/128/256APSK) *Smaller Roll-off factors *Improved filtering making it possible to have smaller carrier spacing == Use cases == In particular for DTH, a possible use case is the launch of UHDTV-1 (e.g. 4k) television services in Ku-/Ka-band that will adopt HEVC encoding. ((ref,p7 )) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DVB-S2X」の詳細全文を読む スポンサード リンク
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