Incorporating HDR/WCG in the broadcast workflow

By Aale Raza

High dynamic range (HDR) and wide colour gamut (WCG) have made a big splash on the broadcasting world, with numerous manufacturers lining up to show the spectacular colours with their cameras, monitors and projectors

There are, however, challenges to be overcome before these new standards can be incorporated into the broadcast workflow.

Before we move forward and discuss the workflow issues related to HDR and WCG, let me mention that there are at least three standards of HDR:
1. Dolby has developed a standard known as Dolby Vision.
2. HLG (hybrid Log gamma), which has been developed by the BBC and NHK.
3. HDR10, the standard for Blu-ray.

Which of these HDR standards will broadcasters be using?

There is also a lack of related equipment that can read HDR content — such as reference monitors, consumer displays and video links which are capable of higher bandwidth required to transfer HDR content.

The third problem is: for the most part, HDR/WCG interfaces are compatible with HDTV and 4K/Ultra HD (UHD)TV 10-bit and 1-bit signals, and can be carried over existing 3-12Gbps interfaces. If, however, high frame rate (HFR) signals such as 100Hz and 120Hz are to become part of an implementation, new interfaces and infrastructure will be required.

Read the full story in the APB September 2018 issue.


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