Quick answer: HLG (Hybrid Log-Gamma) is an HDR transfer standard designed so the same signal can look acceptable on SDR TVs and better on HDR TVs — popular for live broadcast and some streaming/sports deliveries. It is part of the HDR family alongside HDR10, Dolby Vision, and HDR10+.
You will see HLG listed in TV HDR format menus, tuner/set-top notes, and camera/phone HDR video modes. It is less about movie disc logos and more about broadcast-friendly HDR.
This explainer is based on how HLG appears on consumer TVs and cameras. Gadget Clash does not measure broadcast HDR. Confirm HLG decode on the exact display and source.
HLG at a glance
| Question | Short answer |
|---|---|
| What it is | Broadcast-oriented HDR curve that stays somewhat SDR-compatible |
| Helps most with | Live TV, sports, and some camera/phone HLG recordings |
| Care most if | You watch broadcast HDR or shoot HLG video |
| Ignore if | You only stream HDR10/Vision movies and never see HLG badges |
| Related | HDR10, Dolby Vision, camera Log profiles (different topic) |
What HLG actually is
Movie HDR often assumes a mastering display and metadata (HDR10/Vision). HLG was built for TV infrastructure: a hybrid curve that relative HDR TVs can expand while older SDR sets still show a watchable image without complex dynamic metadata chains. That makes it practical for live production.
On a consumer TV, HLG is just another HDR input mode. Peak look still depends on panel nits, tone mapping, and whether the channel/app actually sends HLG. Phone “HLG HDR” video is a capture/playback flavor — not identical to cinema Vision grades.
Why it shows up on product pages
- TV HDR checklists: HLG beside HDR10 / Vision / HDR10+
- Broadcast readiness: Countries rolling out HDR live TV
- Creator cameras/phones: HLG recording for quick HDR workflows
- Completeness marketing: “All the HDR formats” bullet lists
Buyer takeaway: HLG matters if your live/broadcast sources use it — otherwise it is a harmless checkbox on modern TVs.
Choose it if / Skip it if
Care about HLG if:
- Your region’s sports/news offer HLG HDR
- You record HLG on a camera/phone and play back on the TV
- You need a TV that explicitly lists HLG decode
Mostly ignore if:
- Your HDR life is Netflix/disc Vision or HDR10
- Every candidate TV already lists HLG (common on recent sets)
HLG vs other HDR formats
| Format | What shoppers should know |
|---|---|
| HLG | Broadcast-friendly; relative scene light; live TV focus |
| HDR10 | Static metadata — streaming/disc baseline |
| Dolby Vision / HDR10+ | Dynamic metadata cinematic/streaming paths |
| Camera Log | Flat recording for grade — not the same as HLG TV mode |
What you need for HLG to show up
- Source actually transmitting HLG (tuner, STB, camera, app)
- TV HDR HLG support enabled on that input
- Cables/ports that pass the signal (usually fine on modern HDMI)
- A picture mode that does not crush highlights
Frequently asked questions
Will HLG look as “wow” as Dolby Vision demos?
Live sports grading differs from blockbuster Vision grades. Expect useful HDR, not always showroom fireworks.
Can SDR TVs show HLG?
HLG is designed to degrade more gracefully on SDR than some HDR formats — quality still varies by decoder.
Is HLG on my phone the same as TV HLG?
Same transfer family idea; capture settings and display mapping still differ. Export/playback paths matter.
Do I need HLG for gaming?
Rarely. Consoles lean HDR10 (and sometimes Vision). HLG is not the main gaming checkbox.
Related terms
Editorial note: Broadcast HDR availability is regional. We do not invent channel lineups. Check your provider and TV OSD. Part of the Gadget Clash Knowledge Base (Displays).