With intelligent compression, only a fraction of that image (the moving person) would be stored. Let’s return to our character walking across a still landscape. Instead, the only information each frame has it what wasn’t in the previous one. In a video that’s intelligently compressed that same background isn’t stored multiple times. In an uncompressed video both those separate images will be stored, something that will take up a lot of space over time. Think of a still landscape with a character walking across it. If you have two consecutive images in a movie, the chances are they’re very similar. This is done in a variety of ways, but the clearest visualization is to think of video like a collection of still images (which it effectively is). Instead, videos on both discs and online are compressed. And that’s because it needs to be.įor example, an uncompressed 4K video would use over 5 terabytes of data per hour - which is far too big for any regularly in-use storage format. I won’t go into detail (I’d recommend watching this excellent video on intelligent compression), but we can cover the basics. And yes, this means we’re going to another short explainer. Why? Well, that’s all because of compression. But… there is a difference between the two.īefore we go further, this isn’t me dunking on streaming quality - in fact, quite the opposite, much of it looks amazing - it just doesn’t look as good as the picture on a 4K Blu-ray player. Now, as I mentioned 4K resolution and HDR are available on both streaming networks and 4K Blu-ray players. So why is it important to know about 4K and HDR? Well, because they’re the foundation of both the 4K Blu-ray experience and streaming.
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While you can appreciate deeper blacks and brighter pictures from anywhere.
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This is because you need a TV of a specific size (or be really close to it) to see the pixel increase from the resolution bump.
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Importantly, you’ll also likely notice a bigger leap in ‘quality’ from non-HDR to HDR than you will from 1080p to 4K.
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Want a TL DR? Well, HDR is a technology that improves the colors on your TV. Currently, there’s a battle going on for format supremacy - similar to the VHS and Betamax wars - but that’s a topic for a different article or video. YES THERE ARE MORE THAN THREE BUT THESE ARE THE IMPORTANT ONES, SUE ME.Īnother important point is that HDR is something that your TV needs to support. (Note: there are other HDR formats, something you can discover more about here, these are just the most popular). Now, there are three main HDR formats: HDR10, HDR10+, and Dolby Vision. This allows them to offer a more realistic, natural image. What that means in reality is that TVs which support the technology have brighter images and a wider range of color details. Instead, we’ll focus on the basics.įirst, what does HDR stand for? Well, that’s High Dynamic Range. HDR is another important element in the discussion about quality - but one I don’t want to dwell on too much. So, there’s a quick description for you: 4K is a display resolution that tells you how many pixels can be displayed on the screen. Effectively, it means more detail. This means it has four times as many pixels than a 1080p screen (which was the old HD standard). But what about 4K? Well, without getting mixed up with cinema formats, 4K for the home user is a screen that displays 3,840 pixels horizontally and 2,160 vertically. Normally, this is described by stating the number of pixels across the screen‘s width and height respectively.įor example, the 1080p resolution is for screens that display 1,920 pixels horizontally and 1,080 vertically. Resolution is simply the number of pixels a screen can show, something that translates directly to the level of detail a picture has. I’ve written about this in more detail here, but I’ll sum it up quickly for the sake of the article. Without getting too weighed down, 4K is a display resolution. Because if we’re going to talk about the benefits of watching a 4K Blu-ray over its most obvious competitor (AKA streaming) we need to get an overview of what this is all about. To achieve this, we’re going to dive-in and define some technical terms. In it - and this article - I’m going to go through why I adore the 4K Blu-ray format, my player of choice, and why this decision is both smart and stupid.
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And in the spirit of everything moving picture related, this whole piece is also a video - something you can watch above.