Dolby Vision vs HDR-10 4K Blu-ray on 2016 LG OLED TV

There are several different formats for the delivery of HDR (high dynamic range) video content to consumers in the home, of which the two most prevalent at this time of writing are HDR10 open platform and Dolby Vision (DV) proprietary solution. The former is used in Ultra HD Blu-rays and the vast majority of 4K HDR streaming from Netflix and Amazon UHD Video, whereas the latter is currently limited to selected shows on certain streaming services (VUDU in the USA, and Netflix).

Here’s a table (accurate as of June 2016) listing the key differences between Dolby Vision and HDR-10 standards:

  HDR10 Dolby Vision
Standard: Open Proprietary
Video Bit Depth: 10-bit Up to 12-bit
Metadata: Static (per title) Dynamic (scene-by-scene)
Software Upgradability: Yes No (SoC hardware-embedded)
TV Brands: LG, Panasonic, Samsung, Sony, etc. LG, Vizio (US)
Delivery Medium: Ultra HD Blu-ray, Netflix, Amazon Netflix, VUDU (US)

Dolby Vision is an end-to-end HDR ecosystem, which means the optimisation process starts right from the beginning during film capture, and permeates all the way through grading, post-production, mastering, encoding, distribution and finally playback on compatible displays. Every Dolby Vision TV will feature an Intelligent Display Mapping Engine that’s embedded within the SoC (system on chip), which is why a non-DV-compliant television can never be firmware-updated to become Dolby Vision-capable.

The Intelligent Display Mapping Engine identifies the output capabilities of the TV (peak brightness, black level, colour volume, etc.), thus allowing for accurate mapping from source content to the actual display performance on a scene-by-scene basis. Dolby claims its DV technology results in more faithful reproduction of the director’s original creative intent in three aspects:

  • Improved colour accuracy: Because the colour volume of the Dolby Vision display is known, colours can be remapped accurately from the source content to take full advantage of the DV television’s capabilities;
  • Higher dynamic contrast: Since the native contrast of the display and the brightness requirements for each scene (through dynamic metadata) are specified, the TV’s backlight intensity and local dimming algorithm can be adjusted with precision depending on the scene APL (dark, bright, mixed, etc.) to achieve a higher effective contrast range; and
  • Shadow and highlight detail preservation: Content that was mastered to 1,000 or even 4,000 nits can be efficiently down-mapped to even a sub-1000-nit HDR television based on the display’s peak brightness data without clipping highlights or crushing shadow detail.

In theory then, Dolby Vision should be superior to HDR10 when it comes to preservation of the original artistic intent of the video source, but is this borne out in real-world viewing? Let’s find out.

Dolby Vision vs HDR10

In the UK, the only TV manufacturer supporting Dolby Vision is LG Electronics, so we used an LG 55E6 OLED we recently reviewed for the purpose of this Dolby Vision vs HDR10 test. For HDR-10 content, we played an Ultra HD Blu-ray of Pan through a Panasonic DMP-UB900 – the best 4K Blu-ray player on the market at this time of publication – to be displayed on the OLED55E6. For DV, Dolby has kindly supplied us with a USB stick containing three demo clips from Pan that was mastered/ encoded in Dolby Vision, which we plugged into the LG E6 too. We paused at the exact same frames, and switched sources between HDMI and USB on the TV to spot the differences.

Note: We could have used a separate LED LCD 4K HDR television for presenting HDR10, but any differences would be muddied by LED LCD versus OLED technologies, which was why we decided to use the same display for this comparison. However, we did cross-check the results against other non-Dolby Vision LED LCDs from time to time.

The following photos (published with permission from Dolby) were taken with a locked-off camera with the exact same manual control settings throughout (aperture, ISO, shutter speed, white balance, etc.). The irony here, of course, is that most cameras don’t have sufficient dynamic range to capture the shadow detail and bright highlights from an HDR TV at the same time, so we had to sacrifice one or the other. We decided to preserve the highlight details in our photos – you’ll just have to take our word that shadow detail on the Dolby Vision shots remained still fully visible in real life.

The first thing we noticed was that although the general APL of HDR-10 video from 4K Ultra HD Blu-ray was brighter than Dolby Vision’s, bright highlights were frequently blown out on the former. The DV version exhibited warmer and more saturated, realistic-looking colours too.

Click on the options below to compare HDR formats:
HDR10 4K Blu-ray | Dolby Vision

Pan
Pan – timecode 00:19:01 (look at the bubbles’ outline & cloud detail in the sky)

We tried lowering the [OLED Light] and [Contrast] values on the LG OLED55E6V during UHD Blu-ray playback of Pan, but could never recover as much highlight detail as what’s delivered by Dolby Vision. Naturally, changing these settings entailed compromising other parts of the HDR10 picture too.


Dolby Vision | HDR10 4K BD | HDR10 [OLED Light] “50” | HDR10 [Contrast] “50”

Neverland
Timecode 00:19:28 (pay attention to the shape of the sun to the left of the mountain)

However, we discovered one method to restore the highlight detail during 4K Blu-ray playback on the LG E6V to almost the same level as Dolby Vision, and that’s by making adjustments on the source player itself. Here were the results when we lowered [Contrast] on the Panasonic UB900 to “-6“:


Dolby Vision | HDR10 UHD Blu-ray | UB900 [Contrast] “-6”

Tiger Lily
Timecode 01:03:55 (pay attention to the sun to the right of the cliff)


Dolby Vision | HDR10 UHD Blu-ray | UB900 [Contrast] “-6”

Tiger Lily
Timecode 00:19:01

Tweaking the settings on the 4K BD player wasn’t without its complications: as you can see yourself from the pictures above, the APL (Average Picture Level) ended being slightly brighter than the Dolby Vision presentation of Tiger Lily sitting on the cliff, but darker during the scene where Pan’s on the deck. Interestingly, we ran the entire Pan Ultra HD Blu-ray sequence on a Samsung KS9500 (otherwise marketed as the KS9800 in the USA) full-array local dimming (FALD) LED LCD we’re currently reviewing, and found that it could reproduce all the highlight detail without needing any adjustment to the source player.

While it’s tempting to jump to the conclusion that Dolby Vision was superior to HDR10 in terms of end-user HDR experience, we needed to point out that the LG 55E6 OLED’s HDR10 rendition was hampered by relatively low peak brightness and substandard tone-mapping. All we could surmise from our comparison were as follows:

  • Dolby Vision delivered a superior HDR image compared with HDR10 4K Blu-ray on the LG OLED55E6, displaying less highlight clipping and more accurate colours;
  • The most effective method to recover the blown-out highlights in Ultra HD Blu-ray movies on the LG E6 was by lowering the [Contrast] on the source player; and
  • A top-end 4K HDR LED LCD TV with high peak brightness and correct tone-mapping (for example the Samsung UE65KS9500) could present HDR10 UHD Blu-ray films in a manner that’s not inferior to Dolby Vision.

In other words, Dolby Vision pulled ahead of HDR10 4K Blu-ray when the display featured suboptimal peak brightness/ colour volume/ tone-mapping, but the gap was closed to negligible levels by a high-end HDR TV with 1000+ nit peak luminance and accurate tone-mapping. Future developments like dynamic metadata for HDR10 (as demonstrated by Samsung at NAB 2016) may level the playing field or even swing things in favour of the open standard.

Perhaps the greatest appeal of Dolby Vision is the promise of high-quality HDR performance on low-cost and midrange televisions, allowing shrewd video enthusiasts to save some money in the pursuit of better home cinema experience, though any possible savings may be partially offset by the potentially higher prices of DV-enabled Ultra HD Blu-ray players (due to the licensing fees payable to Dolby Laboratories) when they’re launched. Exciting (if uncertain) times ahead…

19 comments

  1. I’m curious to know how the clips that Dolby provided on the USB stick were chosen. Did you specify which clips you’d like, or were Dolby able to choose from anywhere in the entire film – which would allow them to cherry pick their best examples.

  2. Great article

  3. So would you say the KS9800 surpassed the oled with HDR10? how did the blacks compare, this will certainly impact the picture in other areas.

  4. @AD: The demo clips were on a USB stick handed out by Dolby to the media (where I’m present).

    @morgs: Thanks!

    @ray: In terms of bright highlight retention, yes. OLED still wins in blacks and dark scene rendition due to lack of blooming/ haloing.

    Warmest regards
    Vincent

  5. Only LG and Vizio do Dolby Vision. Everyone else only have the crappy HDR 10.

  6. It feels like HDR10 is VHS to Dolby Vision’s Betamax…

  7. By any chance, are you able to share these clips online?

  8. Why would DV be cheaper than HDR10 when it’s proprietary, so presumably includes licensing costs, unlike the open standard HDR10?

    The DV video was provided by Dolby, while the Bluray disc was not meant to be an HDR10 showcase. Is there a way to rule out better mastering, rather than advantages inherent in the standard?

  9. The blacks are crushed on dolbyvision however, so which is worse? It seems you are too focused on highlights, surprised you didn’t menton this. This leads me to question did you even try adjust the ‘brightness’ setting on hdr 10? You mentioned contrast and oled light but not the brightness.

  10. Does anyone know how to get any downloadable test images that are dolby vision?

  11. Is it true that you will only be able to get Dolby Vision off a Disc when the Dynamic HDR Metadata System is enabled with the release of HDMI 2.1? And if so will LG be updating their OLED’s to the new HDMI as I don’t want to waste a lot of money buying a great TV only to get burned because I will only be able to use it with streaming apps and not physical media?

  12. Like LG, Philips is supporting HDR10 and Dolby Vision.

  13. Great article! Do you know if current HDR10 TV’s can receive a firmware update to enable the meta data or would that require a new TV?

  14. Also changing the contrast on the UB900 would result in that all non-HDR material would look wonky? Changing the settings for every disc is a bit of a hassle.

  15. >Is it true that you will only be able to get Dolby Vision off a Disc when the Dynamic HDR Metadata System is enabled with the release of HDMI 2.1?

    No. The Dolby Vision metadata is embedded in the frame itself and can work on HDMI 1.4 with dynamic metadata.

    >The blacks are crushed on dolbyvision however,

    The blacks are not crushed on Dolby Vision. The same Pan master was used for both Dolby Vision and HDR10, at least for Vudu and the UHD BD. WB has been using the same master for both. You don’t actually grade for one over the other. You put the display, Pulsar in the case, into ST2084 mode. The movie is run through Dolby’s CMU to create the Dolby Vision metadata. WB has another tool that creates the MaxCLL/MaxFALL metadata per frame. This information is then input into the encoder (Ateme in the case of the UHD BD) as well as authoring software. (Scenarist for the UHD BD).

  16. The PAN UHD Bluray the MaxCLL/MaxFALL is set to zero on the disk the display you used is not capable of the full luminance range so it has just clipped the whites which is why you got the results you got. If the MaxCLL/MaxFALL was set correctly the tone mapping would have kicked in and given you a much more pleasing result a lot closer to Dolby Vision. Its a shame UHD Bluray is such a total cock up.

  17. Viewing this in my iPad Pro, hdr10 looked so much better, but isn’t HDR just marketing fluff and a proprietary tech designed to lock you out of content unless you pay for it? I mean it’s only a wider colour gamut, Apple displays are all higher colour gamuts than thes HDR TVs now, 100% dci-p3.

  18. HDTvTest’s coverage of the HDR topic has been excellent so far and very informative imo. While waiting for your Sony ZD9 review, your coverage has got me wondering: Do HDR metrics in regards of black levels actual give a true account of a screen’s black level and HDR ability we will perceive?

    From reading through, I started thinking about the time it takes the human eye to adjust to see light following a quick switch from a bright room to lights off. Perceptually, a room will instantly feel like it is pitch black, yet after eye adjust – typically measured in 10s of second – the eye can then discern low light. Taking that into context of HDR and LCD versus OLED, is this the real reason that Sony ditched OLED for consumer screens? Are they pursuing cheaper technology that can go brighter in highlights, to also improved perceived – in motion – black levels to get the best of both worlds ? By human perception – rather than a metric black level.

  19. @sheldoncrusher interesting points. Does Sony’s foray back into OLED help answer any of these questions? It has for me.