Market Overview

Ultra HD Forum Releases Phase A Guidelines V1.5


IBC SHOW –The Ultra
HD Forum
is the global organization promoting the industry's proven
best practices for the delivery of immersive ultra-high-definition (UHD)
experiences. Technologies include high dynamic range (HDR), wide color
gamut (WCG) and High Frame Rate (HFR) for images, personalized next
generation audio (NGA) and Content Aware Encoding (CAE).

The Ultra HD Forum (UHDF) today released a major Phase A
Guidelines update <>.
Version 1.5 is the fifth public release and reflects another intense
year of collective industry experience. Key changes from version 1.4 are:

1. Descriptions and workflow diagrams of four "real world" deployments
of UHD / HDR services for marquee television events (major sports
tournaments, parades, etc.).

2. Synergies between Phase A and Phase B technologies. (Phase B
technologies are independent, incremental additions to the foundation of
Phase A technologies.)

3. Important new standards that support Phase A workflows, including
SMPTE ST 2108-1 for carriage of HDR metadata over SDI interfaces.

4. Clarification between "HDR10" and "PQ10" to ensure alignment with
other new SDOs' specifications such as SCTE's.

5. More detail about two-step forensic watermarking methods.

Ultra HD Forum Phase A guidelines were first published in 2016, and

  • End-to-end workflows for UHD services
  • Resolutions of 1080p (with HDR) and 2160p
  • HDR / WCG (PQ10, HLG10 and HDR10)
  • Channel-based immersive audio

Note that Phase B Guidelines, first published in 2018, introduce UHD
enhancements and enablers such as:

  • Dual-layer HDR technologies
  • Dynamic HDR Metadata systems (Dolby Vision & SL-HDR1)
  • High Frame Rate (100/120 FPS)
  • Next Generation Audio (Dolby AC-4 & MPEG-H Audio)
  • Content Aware Encoding

Phase B Guidelines show how these technologies can be implemented in a
way that is backward compatible with Phase A decoders, which makes them
attractive to operators.

About the Ultra HD Forum

Formed in 2015, the Ultra HD Forum is the global organization
responsible for promoting market adoption of Ultra HD by defining
industry best practices for the phased introduction of the wide set of
technologies facilitating the next-generation television experience. The
organization facilitates interoperability testing and collaborates with
industry standards bodies to align standard development activities. A
list of member companies and additional information about the
organization is available at
and by following @UltraHDForum
on twitter.

View Comments and Join the Discussion!