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HLG

HLG, or Hybrid Log-Gamma, is an HDR format used especially for broadcast and live video. A TV with HLG support can interpret compatible HLG content.

What HLG means

HLG stands for Hybrid Log-Gamma. It is a high dynamic range (HDR) video format designed primarily for broadcast and live content. On a TV product page, “HLG: Yes” means the television supports decoding or displaying compatible HLG signals.

HLG is often listed alongside other HDR formats, such as HDR10, HDR10+, and Dolby Vision. These are separate formats, so support for one does not automatically confirm support for the others.

Why HLG may matter

HLG matters if you watch live or broadcast programming delivered in HLG. It can also be relevant when a streaming device, broadcaster, or other video source sends an HLG signal to the TV.

The label is less important if your sources do not provide HLG content. A TV can still support other HDR formats without supporting HLG, and HLG support alone does not identify which services or channels will provide compatible programming.

What the label does not tell you

HLG support is a compatibility flag, not a picture-quality rating. It does not by itself indicate:

  • How bright the TV becomes with HDR content
  • Its contrast, black levels, or local-dimming performance
  • Color accuracy or viewing-angle performance
  • The quality of the TV’s HDR processing
  • Whether a particular broadcast, app, or external device will output HLG
  • Whether every HDR format is supported

TVFit’s product data shows HLG appearing by itself and in combinations with formats such as HDR10, HDR10+, and Dolby Vision. Those combinations describe listed format support; they do not provide a complete performance assessment.

What to check on a product page

Look for HLG in the product’s HDR or high dynamic range technology specifications. Then check the complete list of supported HDR formats rather than assuming that HLG includes HDR10, HDR10+, or Dolby Vision.

Also confirm the source devices and services you plan to use. The HLG entry does not, by itself, identify supported apps, channels, inputs, signal limits, or the quality of the resulting image. If those details are not listed, they remain unknown.