---
title: "HLG (Hybrid Log-Gamma)"
url: https://postproduction.studio/en/glossary/hlg
language: en
description: "A relative HDR transfer function (BT.2100) designed for broadcast — backwards-compatible with SDR displays. Used by BBC, NHK and live HDR broadcasts. Pe..."
updated: 2026-10-25
---

[Back to Glossary](https://postproduction.studio/en/glossary)

# HLG (Hybrid Log-Gamma)

A relative HDR transfer function (BT.2100) designed for broadcast — backwards-compatible with SDR displays. Used by BBC, NHK and live HDR broadcasts. Peak nominal at 1000 nits.

Color Science, DeliveryMastering Engineer, Broadcast EngineerMastering, Delivery

## Related terms

[PQ curve](https://postproduction.studio/en/glossary/pq-curve)[HDR10](https://postproduction.studio/en/glossary/hdr10)

Peak luminance targets (logarithmic scale). Most consumer HDR displays cap around 1000-2000 nits today.

## Articles covering this term

* [Ambient Light and Perception: Gamma, PQ, HLG, and Dolby Vision IQ

  How ambient light affects perceived contrast. A complete guide to Gamma, HDR PQ, HLG, Dolby Vision IQ, and their implications for post-production.](https://postproduction.studio/en/image/ambient-light-gamma-hdr)
* [HDR Formats: PQ, HLG, HDR10, Dolby Vision Workflows

  Complete HDR guide: PQ vs HLG curves, HDR10/HDR10+, Dolby Vision, dynamic metadata, mastering workflows, dual SDR/HDR delivery strategies.](https://postproduction.studio/en/image/hdr-formats)
* [HDR Delivery: From the UltraHD Label to Streaming and Cinema

  How HDR reaches the viewer: UltraHD Premium label, HDR10, Dolby Vision and HLG, streaming, broadcast distribution and cinema HDR (laser projection, LED screens).](https://postproduction.studio/en/formats/hdr-delivery-distribution)
* [Reference monitors: OLED, LCD, HDR

  Technical guide to reference monitoring displays. OLED, LCD, HDR evaluation, calibration standards, viewing environments, and professional display technologies.](https://postproduction.studio/en/tools/monitoring-displays)
* [ACES: End-to-End Color Workflow System

  Master ACES color workflow: AP0/AP1 spaces, IDT/RRT/ODT transforms, ACEScg/ACEScct, VFX integration, HDR workflows, and implementation best practices.](https://postproduction.studio/en/image/aces-workflow)
* [Video measurement: waveform, vectorscope, scopes

  Comprehensive guide to video measurement tools in post-production. Master waveform monitors, vectorscopes, histograms, and HDR scopes for precise color grading.](https://postproduction.studio/en/tools/measurement-tools)