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    CNET logo Why You Can Trust CNET

    Our expert, award-winning staff selects the products we cover and rigorously researches and tests our top picks. If you buy through our links, we may get a commission. How we test TVs

    HDR TV Formats Explained

    Dolby Vision, HDR10, HDR10 Plus and HLG: Here's what every HDR format means and which one you should choose.

    Headshot of Geoffrey Morrison
    Headshot of Geoffrey Morrison
    Geoffrey Morrison Contributor
    Geoffrey Morrison is a writer/photographer about tech and travel for CNET, The New York Times, and other web and print publications. He's also the Editor-at-Large for Wirecutter. He is the author of Budget Travel for Dummies as well as the bestselling sci-fi novels Undersea, and Undersea Atrophia. He's NIST and ISF trained, and has a degree in Audio Production from Ithaca College. He spends most of the year as a digital nomad, living and working while traveling around the world. You can follow his travels at BaldNomad.com and on his Instagram and YouTube channel.
    Geoffrey Morrison
    7 min read
    A Scottish castle on the edge of the sea demonstrating HDR and SDR.
    Geoffrey Morrison/CNET

    Nearly all new TVs and projectors have the ability to decode HDR, or high dynamic range, video. In most cases, HDR content looks better than non-HDR material, though an individual display's ability to deal with the extra data can vary greatly. There are multiple HDR formats, including Dolby Vision, Dolby Vision 2, HDR10, HDR10 Plus and HLG. Most displays can only decode one or two of these. Likewise, streaming services and 4K Blu-rays typically offer only one or two.

    Fortunately, all HDR displays can play HDR content -- just not always in the best format available. Here's what to keep in mind when shopping for a new TV or deciding which streaming service to use for a movie or show.

    The basics

    Four identical images of canoes on a lake to show the differences with HDR.

    These images attempt to illustrate, on your standard dynamic range screen, what HDR can do on HDR displays. The top left shows how the image appears on an SDR display, tuned so the shadows are visible. Notice how the highlights in the clouds are "blown out," meaning they lack detail. The upper right shows the HDR version with detail preserved in the clouds. The lower left shows the same image adjusted to preserve the highlights, which causes the shadows to disappear. HDR displays showing HDR content have a wider dynamic range -- the difference between the brightest and darkest parts of an image.

    HDR10plus.org

    In CNET's TV and projector reviews, we've found that both the capabilities of the TV itself and the way HDR is used in the movie or TV show have a greater impact on image quality than the specific HDR format. In other words, just because a display supports a "better" HDR format doesn't mean it will look better than one that doesn't. Here's a tour of the HDR landscape today.

    • Everything supports HDR10, but many TVs and sources will also have at least one of the other formats.
    • Dolby Vision and HDR10 Plus can look better in specific ways compared to HDR10. All will look better than non-HDR, standard dynamic range content.
    • One format might look "better" than another on paper, but in the real world, image quality depends far more on the TV's overall performance and how the content was made.

    Most new TVs can display HDR content, which preserves more detail in both bright and dark areas of an image, creating a greater "dynamic range" than non-HDR content (i.e., pretty much everything you've ever watched). That older format is now called SDR, or standard dynamic range. On an HDR TV, HDR content can look far more punchy and vibrant than traditional video.

    Read more: How HDR Works

    aja-sdr-hdr-chart

    The dynamic range of what's captured by the camera (left) and what's possible on SDR and HDR displays. 

    AJA

    Just having an HDR TV isn't enough; you also need HDR content. Without it, the TV doesn't have much to work with. It may still look good and can artificially expand SDR content for a slight improvement, but to get the most out of HDR you need content designed for it. Thankfully, there's now plenty available, including movies, TV shows and even video games. Chances are your favorite new programs already support HDR.

    HDR10

    • Supported by everything.
    • Better image quality potential than SDR, but perhaps not as good as HDR10 Plus or Dolby Vision.
    • Static metadata.

    HDR10 is about as close to a universal standard as we've got. Because it's free for manufacturers to use, it's supported almost everywhere. Every HDR TV can decode it and every HDR streaming device supports it. Nearly all HDR content includes an HDR10 version, sometimes alongside more advanced formats such as Dolby Vision, which we'll discuss shortly.

    HDR10's main limitation is its "static" metadata, meaning a single HDR "look" is applied to an entire movie or show. That's still better than SDR, but it doesn't allow very bright or very dark scenes to look their absolute best within the same film. This one-size-fits-all approach works, but it prevents both the content and the TV from reaching their full potential. Dynamic metadata, which most other HDR formats use, addresses this limitation.

    Static metadata is like forcing an entire football team to wear the same size shirt. It might fit the quarterback and look OK on the big linebacker and tiny kicker, but everyone would look better in shirts sized for them.

    HDR10 isn't backward-compatible with SDR TVs, so it's no good for broadcast. You'll find it available with streaming content and on 4K Blu-ray.

    HDR10 Plus

    • Championed by Samsung.
    • Dynamic metadata.
    • Potentially better image than vanilla HDR10.

    As you may have guessed from the name, HDR10 Plus is similar to HDR10, but with a little plus. The "plus" in this case is dynamic metadata, which improves on HDR10's static version. This means that on a per-scene -- or even per-image -- basis, the content can provide the TV with all the information it needs to look its absolute best.

    While there are certain fees for manufacturers to use HDR10 Plus, they're much less than what Dolby charges for Dolby Vision. Because it's from Samsung, it's highly unlikely there will ever be an LG TV with HDR10 Plus. Sony is another holdout, likely for similar reasons. However, Epson, TCL, Hisense, Roku and others offer HDR10 Plus compatibility.

    hdr10-via-samsung

    It's a little hard to see in this graphic, but notice how the frames on the right show different levels of brightness in the sky. This example uses a standard dynamic range image on a standard dynamic range screen. HDR10 Plus's dynamic metadata allows filmmakers to optimize how each shot or scene is displayed. HDR10, by contrast, uses static metadata -- a single setting that must serve as a compromise between the darkest and brightest scenes.

    Samsung

    On the content side, there's Amazon, Apple TV, Disney Plus, Paramount Plus and Netflix, among others. Keep in mind that just because a company or streaming service supports HDR10 Plus doesn't mean that every product or show/movie is compatible with or has HDR10 Plus data.

    Read more: What is HDR10 Plus?

    Dolby Vision and Dolby Vision 2

    • Potentially the best image quality of all the formats.
    • Less content available than with HDR10.
    • The de facto "step up" HDR format.

    Dolby Vision, like HDR10 Plus, can have dynamic metadata. Streaming services including Netflix, Amazon, Vudu and Apple TV support it, and you can find it on some 4K Blu-rays. Some Dolby Vision features -- including dynamic metadata and color handling -- are optional in HDR formatting for NextGen TV, though over-the-air HDR content remains rare.

    Dolby_Vision.jpg

    This is an approximation, using two SDR images, of what you'd see if you placed an SDR and HDR TV side-by-side.

    Dolby

    The downside of Dolby Vision is that manufacturers have to pay Dolby to use it. In return, Dolby helps them optimize their TVs to look their best with DV content. For some companies, that's an easy way to improve picture quality. Larger manufacturers -- like a certain Korean brand that begins with the letter S -- prefer to invest in their own HDR formats instead, thank you very much.

    After HDR10, this is the most popular HDR format, but that doesn't mean it's universal. Samsung is the biggest holdout, for reasons mentioned above. Generally speaking, if a company doesn't support Dolby Vision, it likely supports HDR10 Plus, though some companies support both. There is less Dolby Vision content than there is vanilla HDR10 content, but big-budget movies and TV shows almost always include it. 

    Dolby Vision 2
    Dolby

    Announced at CES 2026, Dolby Vision 2 introduces several new features. The most controversial, in my opinion, is optional motion smoothing, which would allow directors or showrunners to smooth scenes they consider too juddery, such as fast pans. The format also includes "content intelligence" features that adjust a TV's performance based on ambient light and the content being shown. Midpriced and lower-end TVs will support the base version of Dolby Vision 2, while higher-end models will offer Dolby Vision 2 Max, which includes the motion-smoothing feature. We'll have to see how it's implemented once TVs and compatible content arrive, possibly later this year.

    The good news is DV2 is compatible with all current Dolby Vision TVs. Older DV TVs won't have access to the new features, of course, but the HDR and dynamic metadata will still work.

    HLG

    • From BBC and NHK.
    • Free to use.
    • Broadcast-friendly.

    Hybrid Log Gamma was created by Britain's BBC and Japan's NHK. Unlike the formats we've discussed so far, it's actually backward-compatible with SDR TVs. One signal that works on both older TVs and newer ones is a huge deal for broadcasters. As you can imagine, it's not without drawbacks -- mainly when it comes to picture quality. Like HDR10, HLG is likely better than SDR, but it may not match the picture quality of some other HDR formats. It's the format used for over-the-air HDR broadcasts.

    hybrid-log-gamma

    A graphical representation of an SDR and HLG signal. The vertical axis is the signal, from broadcast, cable or satellite, for example. "0" is black, "1" is bright white. The horizontal axis is the physical brightness coming out of your television. An SDR TV would see the HLG signal and think it was "normal," showing an image with, perhaps, better highlight detail. An HDR TV that's HLG-compatible would understand what to do with the HLG signal and show that brighter information as a physically brighter part of the image (i.e., how HDR normally works). 

    Public Domain/Creative Commons

    There's already wide TV support. Content is still in the early stages, however. If you can get the BBC's iPlayer (whether you're in the UK or using a VPN), that service has HLG support. DirecTV and YouTube also support HLG, but there's just not a lot of content so far. It's free and fills an important niche, but it's been years since it came out and it hasn't been widely adopted. Some phones can record HDR via HLG, which you can playback on HLG-compatible displays.

    For more info, and why it's so different from other methods, check out our explainer on hybrid log gamma

    Advanced HDR by Technicolor (SL-HDR1, 2 and 3)

    • Not widely supported.
    • Each "flavor" has its own niche.
    • Unlikely to see wide adoption

    Technicolor's Advanced HDR comes in multiple flavors: SL-HDR1 is similar to HLG in that it's fully backward-compatible with SDR TVs, allowing for one signal to rule them all; SL-HDR2 has dynamic metadata like HDR10 Plus and Dolby Vision; SL-HDR3 uses HLG as a base, but adds dynamic metadata.

    technicolor-hdr-path

    The path to SDR and HDR in one SL-HDR1 signal. The top is the content creation, the bottom is what your TV will do with it. The SDR content is automatically created from the HDR signal.

    Technicolor

    Content is limited to some NextGenTV broadcasts. It's unlikely it will get wide acceptance among streaming companies. 

    Read more: What is Advanced HDR by Technicolor?

    There can be only one. Or three. Or maybe five

    Here's the tl;dr: HDR10 is the main HDR format. Dolby Vision and HDR10 Plus are the step-up options that offer potentially better image quality. All HDR should look better than older SDR content (or the non-HDR version of modern content). NextGenTV continues its slow rollout. The potential of free over-the-air HDR is still there, but at this point it's in the hands of the individual channels and channel owners as to how much HDR they want to broadcast. 

    Generally speaking, it's worth making sure any new TV you're considering supports either Dolby Vision or HDR10 Plus since the dynamic metadata can make a noticeable difference, especially on the best TVs. The good news is that the majority of new shows, movies and even many games, all support HDR in one way or another. Most TVs and projectors do as well, though of course, some better than others.

    Note: This story was first published in 2018 but is updated regularly to reflect new HDR formats and info.


    In addition to covering audio and display tech, Geoff does photo tours of cool museums and locations around the world, including nuclear submarinesaircraft carriersmedieval castles, epic 10,000-mile road trips and more.

    Also, check out Budget Travel for Dummies, his book, and his bestselling sci-fi novel about city-size submarines. You can follow him on Instagram and YouTube

    CNET logo Why You Can Trust CNET

    Our expert, award-winning staff selects the products we cover and rigorously researches and tests our top picks. If you buy through our links, we may get a commission. How we test TVs

    Your TV's Sound Is Bad. These Free Fixes Make It Noticeably Better

    A few free settings changes won't transform your TV's built-in speakers, but they'll make them sound considerably less bad.

    Headshot of Geoffrey Morrison
    Headshot of Geoffrey Morrison
    Geoffrey Morrison Contributor
    Geoffrey Morrison is a writer/photographer about tech and travel for CNET, The New York Times, and other web and print publications. He's also the Editor-at-Large for Wirecutter. He is the author of Budget Travel for Dummies as well as the bestselling sci-fi novels Undersea, and Undersea Atrophia. He's NIST and ISF trained, and has a degree in Audio Production from Ithaca College. He spends most of the year as a digital nomad, living and working while traveling around the world. You can follow his travels at BaldNomad.com and on his Instagram and YouTube channel.
    Geoffrey Morrison
    5 min read
    Here's How To Make Your TV Sound Better (For Free)

    Your TV's audio settings are doing more harm than good if you've never adjusted them from the factory defaults.

    Ty Pendlebury/CNET

    The dirty secret of the modern TV industry is that picture quality has never been better and audio quality has arguably never been worse. As displays have gotten impossibly thin and engineering resources have poured into panel technology and processing, the speakers have gotten smaller, weaker and increasingly pointed away from the person trying to watch. The result is breathtaking visuals paired with audio that can make dialogue hard to follow and action sequences sound like they're happening in another room. The good news is that a few settings adjustments can help, and every one of them is free.

    There's no setting that will magically transform your TV's audio into movie theater sound. Physics is at play, and the tiny speakers in skinny modern TVs just can't create quality audio. However, there are some settings and other tricks that might help. 

    TV settings for better sound

    TV manufacturers know that bad sound is one of the biggest complaints people have about modern TVs. They've added audio processing features -- some good, some bad -- to many TVs. Again, there's only so much they can do, but they can help. 

    Sound mode: Some TVs have different sound modes that adjust to accentuate or attenuate different frequencies to sound better with different content. These should have names that are fairly obvious once you find the setting, like Clear Voice or Speech Mode.

    Dialog enhancers: Some TVs have separate features that enhance the sound frequencies most common for voices. These have names like Speech Boost, Dialogue Enhancement, Speech Clarity and similar.

    EQ: Some TVs have an equalizer, or EQ, feature. This will let you adjust the relative volume of high and low frequencies, treble and bass, respectively. Try reducing the bass a few notches first, then increasing the treble. If there's a separate midrange control, turning that up is another option to try. The difference should be noticeable, but you might need to play around with it a bit to get it to sound better than flat (aka no EQ at all). 

    Counterintuitively, with some TVs, you might experiment with turning both bass and treble down slightly. In some cases, this might result in boosting the midrange, where most voices are. Depending on how the EQ is designed, this might not work, however.

    Automatic volume control: Some TVs have the ability to lower loud sounds and boost quiet ones. If you've ever been watching a movie, having turned up the volume to understand the dialogue, only to be blasted out of the room when the action starts (or the commercials come on), look for this setting. It might also be labeled "compression." This can result in the volume "pulsing" as it gets louder and softer during different scenes, but that might be a better option depending on how annoyed you were without this feature on.

    A wall mounted LG TV displayed its quick menu for settings
    Aryan Surendranath/CNET

    Stereo vs. surround sound (source settings)

    If you're using an external source, like a streaming device, cable/satellite box or gaming console, check the settings in those devices. They'll often default to sending surround sound, expecting your TV to decode that even though it doesn't have any surround sound capabilities. Switching these to stereo or PCM stereo will result in your TV getting simpler two-channel sound. In some cases, this might be an entirely different mix of the show, movie or game's audio. The result could be an easier-to-understand dialogue, since the creators will mix it differently. 

    It's also worth checking the menus of the streaming service you're using. For instance, some Amazon Prime shows have a built-in dialogue boost mode called, conveniently, Dialogue Boost.

    Move the TV

    Here's How To Make Your TV Sound Better (For Free)

    This TV is going to sound terrible, but at least it's not as high above the fireplace as it could be

    Grace Cary/Getty

    This is probably the most difficult solution on this entire list. I know many of you probably can't move the TV from where it is. I have seen some TV setups that have a significantly negative impact on sound quality, and if you have one of these, you might want to consider either moving the TV or one of the Not Free options below.

    • TV inside a cabinet or shelf
    • TV on a stand with no wall behind it
    • TV in a corner (especially near the ceiling)

    TVs are designed with the expectation that they'll be sitting on or near a flat wall. The sound, in most cases, will bounce off this wall. If it's in a cabinet, between shelves or if there's no wall behind it, the sound can be muffled or hard to hear from where you're sitting. If moving the TV isn't an option, consider what you can do to "free the sound" from its prison.

    If your TV is on a regular TV stand, experiment with moving it closer to or farther from the wall. The sound will change, but depending on your room, it might be better (or worse).

    And if all else fails… some not free options

    A black Bose Smart Ultra Soundbar sits just in front of a Television on a light grey TV stand.

    Even a basic soundbar will likely be a vast improvement over the TV's speakers.

    Josh Goldman/CNET

    If you've tried all the above and you're still not satisfied with your TV's sound quality, there are two options. These aren't specifically about making the sound louder, though they can; they're about making the sound better. In most cases, you can listen at lower volumes and hear the dialogue better compared to the TV's built-in speakers.

    The cheaper solution is a soundbar. There are inexpensive soundbars that sound surprisingly good -- significantly better than any TV speakers. Setup is typically just a single wire from your TV and power to the bar and, usually, a wireless subwoofer that can go anywhere in your room. Soundbars can transform your experience watching shows and movies. Most can double as Bluetooth speakers for music when you're not watching TV. They're a great addition to any room with a TV. 

    The next step up is a receiver with separate speakers. This can be as simple as two bookshelf speakers, or as elaborate as a seven-speaker system with one or more subwoofers. Generally, these will sound far better than a soundbar, with more convincing and engaging surround sound, but the cost and installation effort are much higher. Setup isn't difficult, but it will take longer than the plug-and-play aspect of most soundbars.

    Somewhere between these options are soundbars that include surround speakers, some of which are wireless, making installation a bit easier. Any of these options will greatly improve the sound in your room. If you struggle to understand dialogue or just want a more cinema-like experience at home, they're worth the cost.


    About the author: In addition to covering audio and display tech, Geoff does photo tours of cool museums and locations around the world, including nuclear submarinesaircraft carriersmedieval castles, epic 10,000-mile road trips and more.

    Also, check out Budget Travel for Dummies, his book, and his bestselling sci-fi novel about city-size submarines. You can follow him on Instagram and YouTube.

    • Home
    • Home Security

    When to Replace Your Surge Protector (Before It Catches Fire)

    Surge protectors are a common source of home fires. Here's how to tell when you need to replace yours.

    Headshot of Tyler Lacoma
    Headshot of Tyler Lacoma
    Tyler Lacoma Editor / Home Security and Smart Home
    Tyler has worked on, lived with and tested all types of smart home and security technology for over a dozen years, explaining the latest features, privacy tricks, and top recommendations. With degrees in Business Management, Literature and Technical Writing, Tyler takes every opportunity to play with the latest AI technology, push smart devices to their limits and occasionally throw cameras off his roof, all to find the best devices to trust in your life. He always checks with the renters (and pets) in his life to see what smart products can work for everyone, in every living situation. Living in beautiful Bend, Oregon gives Tyler plenty of opportunities to test the latest tech in every kind of weather and temperature. But when not at work, he can be found hiking the trails, trying out a new food recipe for his loved ones, keeping up on his favorite reading, or gaming with good friends.
    Expertise Smart home | Smart security | Home tech | Energy savings | A/V
    Tyler Lacoma
    3 min read
    A burnt surge protector on a wooden floor with two plugs in it.

    Surge protectors can wear out, and you need to know when it happens.

    J.J. Gouin/Shutterstock
    Home Tips

    Your surge protector quietly performs a vital service, protecting your valuable electronics from big power zaps that could fry them. Those surges can come from summer thunderstorms, sudden power grid failures, nearby construction and other causes -- but surge protectors block the electricity before it causes damage. Usually. 

    The key is that surge protectors can burn out, and some will do it faster than others. My guide will show you how it works, when your surge protector starts to die and how to replace it. 

    Read more: Avoid a Fire Hazard and Stop Plugging Space Heaters and These 6 Items Into Extension Cords

    Yes, surge protectors really catch on fire

    A hand unplugs a cable from a surge protector by a computer as it sparks.

    Surge protectors have their limits, and every surge brings them closer to failure.

    wirot pathi/Getty Images

    Surge protectors typically cut off power to devices to save them in a surge, but all that extra electricity has to go somewhere. So protectors have components that absorb voltage above a certain level (note that not all power strips are surge protectors, only those with added defensive hardware).

    Those components aren't invincible and can grow more sensitive over time. When they wear out, the voltage takes over and in a bad surge, makes surge protectors burst into flames. That's not great for home safety, and yes it absolutely has led to house fires in places like Virginia, Massachusetts and other states.

    Replace every two to five years, depending on power surges

    Your beloved surge protecting may not be protecting so much anymore. 

    skaman306/Getty Images

    It's dusty, it's hidden away under your desk and you rarely think about it -- but just how long does a surge protector last?

    Electricians and electrical engineers generally recommend replacing your surge protectors every two to five years. The exact timeframe depends on the joule rating of your surge protector (which is often difficult to find) and how many power surges your protectors have to deal with. Every few years is usually the safe zone.

    The number of surges your home experiences depends on a few factors. One is the quality of your electrical grid and how often it has power failures or grid management whoospies that lead to minor surges, up to 150 per month. Another is if there's major construction near your home. Old or mismatched home wiring can also cause problems, especially if your appliances aren't well-suited to it.

    But for many people, the biggest factor is the weather, specifically how many storms hit the grid with lightning or down power lines in your area. If you regularly get a storm that causes flickering lights or power outages every year, it's a good idea to replace surge protectors frequently. A very bad storm or two that cause neighborhood-wide power outages can knock out your surge protectors completely, signaling you should replace them ASAP.

    Finally, if your home experiences frequent bad lightning storms, a basic plug-in surge protector isn't going to be much use for you. It's often better to upgrade to a whole-home surge protector installed at your electrical panel.

    Replace when LEDs or test buttons no longer respond

    For a power strip, the one from Kasa Smart Wi-Fi looks pretty nice.

    Chris Monroe/CNET

    Guesstimating the lifespan of your surge protector isn't very fun. Modern surge protectors get upgrades to help out, especially LED indicator lights (or even app alerts on smart protectors) designed to go out when the protector's hardware starts failing. It's not perfectly reliable, but it does help.

    Some surge protectors have test buttons like ground fault circuit interrupter outlets do, that you can use to see if they'll properly cut power to devices when a surge hits. If these test buttons no longer work, that's another sign you need to get a new model.

    Oh, and watch for recalls on your surge protector

    I have a couple of final suggestions. First, don't buy surge protectors from knockoff brands or models that seem suspiciously cheap, which could lead to faster failures or missing protection. Second, there's a small possibility that faulty surge protectors are recalled. I've seen it happen in the past with brands like Schneider Electric. Keep an eye on CNET and we'll let you know about any breaking news involving consumer surge protector failures.

    For more info on home safety, visit my security guide cheat sheet and list of the best ways to stop trespassers



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