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DVB-S2X

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Extension of DVB-S2
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DVB-S2X is a digital satellite television broadcast standard.

List of digital television broadcast standards
DVB standards (countries)
ATSC standards (countries)
ISDB standards (countries)
DTMB standards (countries)
  • DTMB (terrestrial/mobile)
    • DTMB-A
  • CMMB (handheld)
  • ABS-S (satellite)
DMB standard (countries)
Codecs
Terrestrial Frequency bands
Satellite Frequency bands

DVB-S2X is an extension of DVB-S2 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 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%
  • 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 backwards 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 encoding.

See also

References

  1. "DVB - The global standard for digital television - Home". DVB. Retrieved 2025-01-02.
  2. "DVB-S2X". DVB Project.
  3. "DVB-S2X specification receives approval from steering board" (PDF).
  4. "DVB-S2x demystified". Newtec.
  5. ref, p7

External links

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