DVB-S2X

Today, DVB-S2X is a highly relevant topic that concerns us all, whether we are aware of it or not. As the world moves towards an increasingly uncertain future, DVB-S2X becomes a fundamental piece in our lives, influencing the way we interact with our environment, with other people and even with ourselves. That is why it is necessary to delve into the knowledge and understanding of DVB-S2X, in order to face the challenges that arise in this changing world. In this article, we will delve into the fascinating world of DVB-S2X, exploring its implications, applications and consequences in our lives.

DVB-S2X is an extension of DVB-S2 satellite digital broadcasting 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 a digital satellite television broadcast standard. It has been standardized by DVB Project in March 2014 as an optional extension of DVB-S2 standard. It will also become an ETSI standard.

Main features

Compared to DVB-S2, efficiency gains up to 51% can be achieved with DVB-S2X.

Amongst improvements are:

  • Higher order modulation schemes (64/128/256APSK)
  • Smaller roll-off factors of 5%, 10% and 15%
  • Improved filtering making it possible to have smaller carrier spacing
  • Channel bonding in order to combine several different 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 there are many television channels which can share their bandwidth. With UHDTV services, it may only be possible to fit 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 the statistical multiplexing to work more efficiently.

Because of a lack of backwards compatibility with existing DVB-S2 decoders, Belgian company Newtec has developed the 'DVB-S2plus/Extensions' technology, which tries to reconcile the benefits of the DVB-S2X with compatibility to existing systems.

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)

See also

References

  1. ^ "DVB-S2X". DVB Project.
  2. ^ "DVB-S2X specification receives approval from steering board" (PDF).
  3. ^ "DVB-S2x demystified". Newtec.
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