Every television in the UK is defined by the industry requirements in the DTG’s D-Book


The D-Book defines the requirements for every new TV and digital terrestrial television (DTT) receiver in the UK. Compliance with this technical specification protects both the industry and consumers, and is a prerequisite of Freeview Trademark Licences.

The DTG, with the support of platforms, broadcasters, manufacturers and the wider industry, has developed and published the D-Book for the last twenty years, helping to deliver an amazing viewing experience to millions of UK consumers.

The D-Book is the result of a unique industry collaboration and acts as the gateway to the UK market, delivering new functionality each year so that the viewing experience always benefits from new technologies.

Driven by industry, the D-Book is open, democratic and supportive of public policy. Industry expert groups continually update and peer-review the specification so that it drives the UK TV market towards innovation, delivering real economic value in this vital industry.

The DTG Council thanks the DTG team and all our industry experts for their insight and invaluable contribution which sustains the UK’s world-leading position in television.

D-Book cover

D-Book 10 Highlights

The DTG’s D-Book 10, published November 2017, provides support on the development of HD products and services, with the introduction of Single Frequency Network (SFN) support for the migration of COM 7&8 DVB-T2 multiplexes into the 700MHz band. Also included is an IP Software Upgrade Option in response to the requirements of manufacturers handling software upgrades to today’s complex TVs, which avoids the need for SSU Broadcast updates.

Peter Seller, Associate Director, Broadcast at the DTG added: “D-Book 10 covers a range of new topics and continues to support all UK DTT-based platforms including Freeview Play, Freeview HD, YouView, EETV, Now TV and the UK DSAT platform, Freesat, as well as several international adaptations. DTT delivers to the largest viewing audience and remains fundamental to the distribution of content and entertainment.

“The industry’s not-for-profit test centre, DTG Testing, continues to offer conformance tests and testing services in support of Freeview HD, and Freeview Play and HbbTV. and D-Book 10 Conformance Tests will be available in April 2018. We will continue our work to ensure European harmonisation wherever possible, while meeting the needs of the dynamic and successful UK TV market.”

January 2018 Corrigenda

The January 2018 corrigenda includes the following updates:

  • HD and UHD HEVC Essential requirements for broadcast video
  • Corrections to performance targets in chapter 9 & 10
  • Updates to Chapter 13 following publication of DVB Bluebooks A001 and A168
  • Receiver recommendations updates in support of HD and UHD HEVC broadcast services


The DTG has published and maintained the D-Book since 1996 and it updates the specification annually to keep apace of the development of UK DTT. The D-Book defines the DTT platforms in the UK and provides requirements for interoperability in clear, unambiguous language. Based on international standards it is produced by a collaborative approach of industry experts and only includes features where there is a guarantee or shared wish to implement on the platform. Where appropriate it delivers harmonisation with other international bodies, enabling manufacturers and service providers to deliver products to market.

  • D-Book 10 is only available to DTG members.