DVB-S2X is a digital satellite television broadcast standard.
DVB-S2X is an extension of
DVB-S2
Digital Video Broadcasting - Satellite - Second Generation (DVB-S2) is a digital television broadcast standard that has been designed as a successor for the popular DVB-S system. It was developed in 2003 by the Digital Video Broadcasting Proj ...
satellite digital broadcasting standard. It was standardized by DVB Project in March 2014 as an optional extension of DVB-S2 standard. It became an
ETSI
The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization operating in the field of Information and communications technology, information and communications. ETSI supports the de ...
standard.
Main features
DVB-S2X increased efficiency up to 51% over DVB-S2.
Improvements include:
*Higher order modulation schemes (64/128/256APSK)
*Smaller
roll-off factors of 5%, 10% and 15% (though even legacy DVB-S and DVB-S2 receivers can benefit from it)
*Improved filtering enabling smaller carrier spacing
*Channel bonding in order to combine several carriers, increasing efficiency in 'Direct-To-Home' (DTH) applications
Channel bonding helps, particularly for UHDTV services. Statistical multiplexing is often used to allow more television services to fit into a single satellite channel. Statistical multiplexing works best when many television channels can share bandwidth. With UHDTV services, it may be possible to fit only 3 services in a single satellite channel, which reduces the effectiveness of statistical multiplexing. Bonding channels increases the number UHDTV services within the bonded channel, allowing statistical multiplexing to work more efficiently.
Because of a lack of backward compatibility with DVB-S2 decoders, Belgian company Newtec developed the 'DVB-S2plus/Extensions' technology.
Use cases
A possible use case is the launch of
UHDTV-1 (e.g., 4k) television services in Ku-/Ka-band with
HEVC
High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10). In co ...
encoding.
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See also
*DVB-S
Digital Video Broadcasting – Satellite (DVB-S) is the original DVB standard for satellite television and dates from 1995, in its first release, while development lasted from 1993 to 1997. The first commercial applications were by Canal+ in ...
*DVB-S2
Digital Video Broadcasting - Satellite - Second Generation (DVB-S2) is a digital television broadcast standard that has been designed as a successor for the popular DVB-S system. It was developed in 2003 by the Digital Video Broadcasting Proj ...
References
External links
Digital Video Broadcasting (DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications Part II: S2 - Extensions (DVB-S2X)
{{Telecommunications
Digital Video Broadcasting
ETSI
Satellite broadcasting
Television transmission standards