What Is Hdr Camera Samsung

High dynamic range (HDR) video is one of the biggest 4K TV feature bullet points. It can push button video content past the (now non-real) limitations to which broadcast and other media standards have adhered to for decades. Information technology's impressive to run across on TVs that can handle it, but it'due south also a fairly confusing technical characteristic with several variations with differences that aren't very well-established. That'south why nosotros're here to explain them to you.

Dynamic Range on TVs

TV dissimilarity is the divergence betwixt how nighttime and vivid information technology can get. Dynamic range describes the extremes in that difference, and how much item can be shown in between. Essentially, dynamic range is brandish dissimilarity, and HDR represents broadening that dissimilarity. However, merely expanding the range between vivid and dark is insufficient to improve a motion picture'southward detail. Whether a panel can reach 200 cd/1000^2 (relatively dim) or 2,000 cd/m^ii (incredibly vivid), and whether its black levels are 0.1cd/g^2 (washed-out, nearly gray) or 0.005cd/m^2 (incredibly dark), it can ultimately just show then much information based on the point information technology's receiving.

Many popular video formats, including broadcast television and Blu-ray discs, are limited by standards built around the concrete boundaries presented by older technologies. Blackness is set to only so blackness, because as Christopher Guest eloquently wrote, "information technology could become none more black." Similarly, white could only go so bright within the limitations of display technology. Now, with organic LED (OLED) and local dimming LED backlighting systems on newer LCD panels, that range is increasing. They can accomplish farther extremes, simply video formats can't take advantage of information technology. Only and then much information is presented in the signal, and a TV capable of reaching beyond those limits withal has to stretch and piece of work with the information present.

What Is HDR?

That's where HDR video comes in. It removes the limitations presented by older video signals and provides data about effulgence and color across a much wider range. HDR-capable displays tin read that information and show an image built from a wider gamut of colour and effulgence. Besides the wider range, HDR video simply contains more data to describe more steps in between the extremes. This ways that very bright objects and very night objects on the same screen can be shown very bright and very dark if the brandish supports it, with all of the necessary steps in between described in the bespeak and not synthesized by the image processor.

To put it more merely, HDR content on HDR-compatible TVs can get brighter, darker, and show more than shades of gray in betwixt (assuming the TVs have panels that tin can become bright and dark plenty to do the signal justice; some upkeep TVs take HDR signals but won't show much of an comeback over non-HDR signals). Similarly, they tin can produce deeper and more than vivid reds, greens, and blues, and testify more shades in between. Deep shadows aren't just black voids; more details tin be seen in the darkness, while the motion-picture show stays very nighttime. Bright shots aren't merely sunny, vivid pictures; fine details in the brightest surfaces remain clear. Vivid objects aren't simply saturated; more shades of colors can exist seen.

This requires much more than data, and like ultra high-definition video, Blu-rays can't handle it. Fortunately, we at present have Ultra HD Blu-ray, a disc type (singled-out from Blu-ray, despite the proper noun) that can agree more data, and is built to contain 4K video, HDR video, and fifty-fifty object-based surround sound like Dolby Atmos. Just be aware that y'all can't play them on regular Blu-ray players; you demand dedicated Ultra Hard disk drive Blu-ray players or a relatively new game console to play them.

Online streaming besides offers HDR content, only y'all need a reliably fast connectedness to get information technology. Fortunately, if your bandwidth is loftier enough to become 4K video, it tin can get HDR; Amazon Video and Netflix's recommended connection speeds for 4K content are respectively 15Mbps and 25Mbps, regardless of whether that content is in HDR or non.

What Is Color Gamut?

This is where HDR gets a scrap more confusing. Wide color gamut is another feature high-end TVs have, and it's even less defined than HDR. It's as well connected to HDR, but not directly. HDR deals with how much light a TV is told to put out, or luminance. The range and value of colour, defined separately from lite, is chosen chromaticity. They're two separate values that interact with each other in several ways, but are even so distinct.

Technically, HDR specifically simply addresses luminance, because that's what dynamic range is: the difference between light and dark on a screen. Colour is a completely separate value based on absolute red, green, and bluish levels regardless of the format of the video. Nevertheless, they're tied together by how we perceive light, and a greater range of light ways we'll perceive a greater range of color. Considering of that, HDR-capable TVs can ofttimes show what's called "wide color gamut," or a range of color outside of the standard colour values used in broadcast TV (called Rec.709).

This doesn't mean HDR guarantees a wider range of colors, or that they'll be consequent. That'south why we test every TV for both dissimilarity and colour. Most TVs today can hit Rec.709 values, but that leaves a lot of colour that the centre can see but that those TVs tin can't bear witness. DCI-P3 is a standard color space for digital cinema, and information technology's much wider. Rec.2020 is the platonic color space for 4K TVs, and it's wider nonetheless (and we've nonetheless to come across any consumer TV that can reach those levels). And here's the kicker: Rec.2020 applies to both SDR and HDR, because HDR doesn't directly address color levels.

The above chart shows the range of color the human being heart can discover equally an arch, and the iii color spaces we mentioned as triangles. Every bit you lot can encounter, each expands pretty significantly on the previous ane.

All of this might seem confusing, merely it boils down to this: HDR doesn't guarantee that you'll get more color. Many HDR TVs accept broad color gamuts, only not all of them. Our Idiot box reviews tell you whether a Tv set is HDR-capable and what its full range of color looks like.

Types of HDR

HDR isn't quite universal, is currently split into ii major formats, with a few others gaining momentum.

Dolby Vision

Dolby Vision is Dolby'south own HDR format. While Dolby requires certification for media and screens to say they're Dolby Vision compatible, it isn't quite every bit specific and absolute as HDR10. Dolby Vision content uses dynamic metadata. Static metadata maintains specific levels of effulgence across whatever content y'all watch. Dynamic metadata adjusts those levels based on each scene or even each frame, preserving more than detail between scenes that are very bright or very dark. By tweaking the maximum and minimum levels of light a Tv is told to put out on the wing, the same amount of data that would be assigned beyond the full range of lite an entire flick or evidence uses tin be set up across a much more than specific, targeted span. Darker scenes can preserve more than detail in shadows and lighter scenes tin proceed more detail in highlights, because they aren't telling the TV to be set to prove contrary extremes that won't fifty-fifty show up until the next scene.

Dolby Vision also uses metadata that's adapted to the capabilities of your specific brandish, instead of dealing with absolute values based on how the video was mastered. This means that Dolby Vision video will tell your TV what light and color levels to use, based on values ready betwixt the Idiot box manufacturer and Dolby that go along in listen the capabilities of your specific TV. It can potentially permit TVs show more item than HDR10, only that ultimately depends on how the content was mastered and what your TV tin can handle in terms of lite and colour. That mastering aspect is important, because Dolby Vision is a licensed standard and not an open one like HDR10. If Dolby Vision is available in the end video, that probably means that Dolby workflows were used all the way through.

HDR10

HDR10 is the standard pushed by the UHD Alliance. Information technology'due south a technical standard with specific, defined ranges and specifications that must be met for content and displays to qualify equally using it. HDR10 uses static metadata that is consistent across all displays. This means HDR10 video sets light and colour levels in absolute values, regardless of the screen it's being shown on. It's an open standard, so any content producer or distributor tin can use it freely.

HDR10+

HDR10+ is a standard developed by Samsung. It builds on HDR10 by calculation dynamic metadata, like Dolby Vision. Information technology doesn't utilize individualized metadata for each screen, but it still adjusts the range of low-cal information technology tells the TV to brandish for each scene or frame. It can potentially add more detail to your picture over what HDR10 shows, and similar HDR10 it's an open standard that doesn't crave licensing with a very specific production workflow.

Hybrid Log-Gamma (HLG)

Hybrid Log-Gamma (HLG) isn't as common as HDR10 or Dolby Vision, and there's very niggling content for it yet exterior of some BBC and DirecTV broadcasts, only it could make HDR much more than widely available. That'southward because it was developed past the BBC and Japan's NHK to provide a video format that broadcasters could use to ship HDR (and SDR; HLG is backwards-compatible). It's technically much more universal because information technology doesn't use metadata at all; instead information technology uses a combination of the gamma bend that TVs use to calculate brightness for SDR content and a logarithmic curve to calculate the much higher levels of brightness that HDR-capable TVs can produce (hence the name Hybrid Log-Gamma).

Recommended by Our Editors

HLG can piece of work with SDR and HDR TVs because information technology doesn't utilize metadata at all, while all the same holding a much wider range of light information. The just issue with it is adoption. It'southward developed for broadcasters, and nosotros still don't run into many broadcasters showing 4K video over the airwaves, cable, or satellite services at all. HLG still has far to become in terms of content.

Each can offer pregnant improvements over standard dynamic range, just they accept their own advantages and disadvantages. In terms of adoption, HDR10 and Dolby Vision are the merely meaning standards that take plenty of content and compatible TVs available. Dolby Vision potentially offers a ameliorate moving-picture show, but it's likewise less common than HDR10 because it's a licensed, workflow-based standard and not an open one. HDR10+ is open up, but nosotros'll need to encounter more companies actually starting time to apply it, and for more than content to be available. HLG could go the almost universal standard due to its metadata-less nature, but again we'll need to really notice some things to spotter in it, get-go.

What You lot Need for HDR

HDR is not simply 4K. A 4K Goggle boxmight back up HDR, but that doesn't apply to all sets. If your Goggle box doesn't support HDR, information technology won't take advantage of the boosted information in the signal, and the panel isn't calibrated to handle that information fifty-fifty if it was properly read. Even if the Television can handle the signal, information technology might not produce a particularly better movie, especially if it's a less-expensive Tv.

Most major streaming services similar Amazon, Google Play, iTunes, Netflix, Vudu, and YouTube at present support HDR for some of their 4K content. HDR10 is fairly universal beyond these services, while some also have Dolby Vision or other formats. Of course, there are also UHD Blu-ray discs, which oft feature HDR10 or occasionally Dolby Vision HDR.

If your TV supports HDR, it probably has access to at to the lowest degree some streaming services that support HDR. Still, it might not have all of them, then you lot might want to get a separate media streamer. The Amazon Fire TV Cube and Burn Tv Stick 4K support HDR10, HDR10+, Dolby Vision, and HLG. The Roku Ultra supports HDR10, Dolby Vision, and HLG, while the Premiere+ merely supports HDR10.

The PlayStation 5 and Xbox Serial X both support HDR10 and Dolby Vision, for streaming apps as well as UHD Blu-ray playback. Of course, the all-digital versions of the consoles, lacking optical drives, tin't play UHD Blu-ray discs, just they can still stream 4K HDR content.

Is HDR Worth It?

4K is now the effective standard for TVs, and HDR is i of the almost important features to consider when buying a new one. It still isn't quite universal, simply both HDR10 and Dolby Vision accept both proven to offer some compelling improvements in dissimilarity and colour over standard definition, and there'due south plenty of content to lookout man with both. If you lot're looking to make the jump to 4K and you have the budget for it, HDR is a must-take feature.

Now that you know all HDR, make sure to read up on 8K to see why information technology isn't every bit important as HDR, at least not yet.

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Source: https://www.pcmag.com/news/what-is-hdr-high-dynamic-range

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