Your browser is not Javascript enable or you have turn it off. We recommend you to activate for better security reasonHDMI 2.0b standard gets support for HLG HDR - FlatpanelsHD

HDMI 2.0b standard gets support for HLG HDR

12 Dec 2016 | Rasmus Larsen |

The HDMI Forum has included support for the third major HDR format, namely HLG (Hybrid Log Gamma), in the HDMI 2.0b standard. HLG has been developed for broadcast TV by UK’s BBC and Japan’s NHK.

HLG support in HDMI 2.0b

The HDMI interface standard already covered the open HDR10 format. Dolby has also built a chip-based solution that can transfer Dolby Vision HDR (with dynamic metadata) over HDMI.

HDMI 2.0b now officially supports the third major HDR format called HLG, which is short for “Hybrid Log Gamma”. It was developed by UK’s BBC and Japan’s NHK for broadcast TV. Since broadcasters have very limited bandwidth, HLG can combine HDR (High Dynamic Range) and SDR (Standard Dynamic Range) in the same TV signal, thus saving broadband for more channels.

A traditional non-HDR TV will ignore the metadata embedded in the signal whereas an HDR TV will detect the extra metadata (if it supports HDMI 2.0b and HLG).

The HDMI Forum says:
- ”NOTICE: Previously, HDMI Specification Version 2.0b (HDMI 2.0b) only supported HDR (High Dynamic Range) video transport in the SMPTE ST 2084 EOTF (as applied in the media profile commonly known as HDR10), by referencing the CTA861.3 specification. The Consumer Technology Association (CTA) has recently notified the HDMI Forum of the adoption of a new version of the CTA-861 Specification, CTA-861-G. This new version provides additional support for HDR Video transport by including (among others) an extension to the static metadata signaling to include the HLG (Hybrid Log Gamma) EOTF. The HDMI Forum has assessed the applicability of the CTA-861-G Specification to HDMI 2.0b. The HDMI Forum has confirmed that the extension of the static metadata signaling to include HLG can be utilized under the existing HDMI 2.0b Specification. This means that HLG Video Transport functionality may be implemented on HDMI 2.0b compliant devices.

HDMI 2.0b is the latest HDMI standard and follows up on HDMI 2.0a that added support for the HDR10 format (and static metadata) in April 2015. HDMI 2.0b is backwards compatible and does not require new cables or connectors. The next version, unofficially called HDMI 2.1, is expected to support dynamic metadata.

HLG HDR on LG OLED TV


TVs need a firmware update

The problem from a consumer standpoint is that most TVs today do not support HLG.

BBC shed some light on the matter the other day when it announced a trial for ‘Planet Earth II’ in 4K/HDR using the HLG format. At that time, BBC said that only Panasonic 2015 and 2016 TVs were compliant.

LG, Philips, Samsung, and Sony have each demonstrated HLG on 2016 products at trade shows but none of them have committed to release a firmware update to add the functionality.

- Source: HDMI Forum via @UHD4k



Latest news

TCL 8 series miniLED LCD TVs

TCL launches 8-series LCD TVs with miniLED starting at $2000

16 Oct 2019 | Rasmus Larsen |
Apple TV app on Roku

Apple TV app arrives on Roku with iTunes 4K HDR & soon Apple TV+

16 Oct 2019 | Rasmus Larsen |
AMC Theaters On Demand

AMC Theaters enters streaming market with on-demand movie service

15 Oct 2019 | Rasmus Larsen |
Handsmaid tale

Hulu expands 4K support to Xbox One, FireTV & LG webOS

15 Oct 2019 | Rasmus Larsen |
Roku LT

Netflix ending support for older Roku players

14 Oct 2019 | Rasmus Larsen |
Band of Brothers

Follow-up to 'Band of Brothers' will be Apple's first in-house series

14 Oct 2019 | Rasmus Larsen |
Lord of the Rings UHD Blu-ray

'The Lord of the Rings' & 'The Hobbit' reportedly coming to UHD Blu-ray

11 Oct 2019 | Rasmus Larsen |
Amazon Music Apple TV

Amazon Music lands on Apple TV

11 Oct 2019 | Rasmus Larsen |