HDR Formats on TVs: Sorting Through HDR10, Dolby Vision, and HLG

What HDR Actually Does

High Dynamic Range — HDR — is a display standard that expands the range between the darkest shadows and the brightest highlights a screen can show. Without HDR, televisions use Standard Dynamic Range (SDR), which caps brightness and compresses color in ways that can make images look flat compared to what cameras originally captured.

HDR isn't a single format. It's an umbrella term covering several competing standards, each specifying how brightness metadata is encoded, delivered to the TV, and interpreted by the display. The format your TV and your content both support determines what you actually see — and a mismatch between the two means the picture falls back to a lesser standard.

Understanding these formats also matters in context with the underlying display hardware. Panel technology plays a significant role in how well any HDR format translates to your screen. See our guide to OLED, QLED, and LED panels for how display type affects HDR performance.

HDR10, Dolby Vision, and HLG: How They Differ

HDR10 is the baseline open standard supported by virtually every HDR-capable TV and streaming service. It uses static metadata — a single set of brightness instructions applied uniformly across an entire film or episode. There are no per-scene adjustments. HDR10 targets a peak brightness of 1,000 nits and specifies a wide color gamut called Rec. 2020. Because it's royalty-free and open, content producers and device makers adopt it broadly.

HDR10+ is an extended version developed by Samsung and Amazon that adds dynamic metadata — per-scene or even per-frame brightness instructions — while remaining a royalty-free open standard. It addresses HDR10's static-metadata limitation without requiring licensing fees.

Dolby Vision also uses dynamic metadata and supports a theoretical peak brightness ceiling of 10,000 nits, far beyond what current consumer TVs can reach. The difference from HDR10+ is that Dolby Vision is a licensed, proprietary ecosystem. Dolby certifies both the mastering process and the display hardware, which means content created under Dolby Vision specifications is tightly controlled from studio to screen. Many streaming services and disc releases carry Dolby Vision tracks alongside HDR10 fallback versions.

HLG — Hybrid Log-Gamma — was developed jointly by the BBC and NHK for broadcast television. Unlike the other formats, HLG encodes HDR and SDR in a single compatible signal, so the same broadcast can be received by both HDR and non-HDR televisions without separate streams. HLG is widely used in live broadcast and over-the-air content.

What Matters When You're Watching

Format specifications on paper don't always translate linearly to visible picture improvement. Several practical factors shape the real-world result:

• Panel peak brightness: A TV that reaches only 400 nits of peak brightness cannot fully render a Dolby Vision master graded at 4,000 nits. The TV's processor maps the content to its own capabilities — called tone mapping — which varies in quality by manufacturer and model.
• Content source: Not all content is available in all formats. A streaming platform may offer Dolby Vision on some titles and HDR10 on others. Checking which format a specific title uses requires reading its detail page on the service.
• Device chain compatibility: Every link in the chain — the source device, the HDMI cable, and the TV — must support the format. A streaming stick that doesn't support Dolby Vision will deliver HDR10 even if the TV and the content both support Dolby Vision. Our streaming sticks vs. smart TV platforms overview covers how source devices affect what formats you receive.
• Streaming settings: Higher-quality HDR streams consume meaningfully more data. See how quality settings affect data usage for a practical breakdown.

For most viewers, the practical difference between a well-implemented HDR10 presentation and a Dolby Vision presentation on the same title is subtle — particularly on mid-range TVs whose peak brightness limits tone mapping headroom regardless of format. Format support matters most on high-brightness premium displays with well-mastered content.