~8.5GB for dual layer), though the BD format takes more space to store your movies, so the available run-time is really not much higher than with DVD. You also get more storage on Blu-ray (~50GB vs. Unfortunately, that never got past the “novelty” stage and so it remains a largely unused feature (in fact we recommend you turn off BD-Live in order to make your player faster). You can also access advanced Java features that let you interact with online content in a way never seen before. For one, the menu system is dynamic, allowing you to change audio formats or jump chapters on the fly-all while able to see the video playing underneath. You can’t ignore the features aspect of Blu-ray. This meant that for the first time, Blu-ray was approaching master quality video and audio for the home user. That latter two are lossless audio formats that closely mimic the actual soundtrack potential of the studio masters (albeit remixed for home theater listening). In addition to the same formats supported by DVD, the BD format added Dolby Digital Plus, Dolby TrueHD, and DTS-HD. When Blu-ray came to the scene it promised greater audio quality in addition to video quality. The DVD format supported exactly three audio formats: Linear PCM, Dolby Digital, and DTS Digital Surround. This may be more of a change than an improvement, but Blu-ray also supports wider color spaces, like xvYCC which is 1.8 times as large as that of the sRGB color space. 709 changed the RGB luma coefficients to 0.2126, 0.7152, and 0.0722-different than DVD’s Rec. 709, among other things, improved (or at least certainly changed) the way luminance was defined as a ratio to RGB color. HDTV’s Rec. While color conversion happens at the same time resolution conversion happens, the idea was that Rec. HDTV changed the way color could be reproduced. 709 which, if you map it out, includes a color scheme that looks kinda like this triangle (the whole space represents visible light): The Blu-ray color space is defined within something called Rec. We get our deepest saturations levels possible from the color space, and generally speaking, the larger the color space the better. While a rather generic term, color space (as we’re using it) refers to the way color ranges, how it is organized, and how the device or format reproduces color in the digital realm. Blu-ray vs DVD: Color SpaceĪnother difference between Blu-ray and DVD is the color space used by each of the formats. The simple fact is, you get more with Blu-ray-at least when you’re playing an actual Blu-ray disc. That’s what you’re essentially doing every time you watch a DVD and it gets upconverted to the native HD resolution of your television. Imagine watching just a 1/6 rectangle on your big screen TV and then stretching that across the rest of the surface area. That means Blu-ray is almost exactly 6x the resolution of DVD. DVD delivers just 345,600 pixels in America. To break it down further, you get 1920×1080 pixels on a Blu-ray-that’s 2,073,600 pixels. The truth is, though, most of us sit pretty close-or our TVs are big enough for us to notice the difference.ġ080p resolution (also called high definition) is what is possible on the Blu-ray Disc format. There is a point at which our eyes lose the ability to render additional detail. Blu-ray and a well-mastered DVD can look very similar if you’re sitting far enough away from the screen. Before we get into the specifics, however, it’s good to understand something. If you check out our screen capture above, Groot gives us a real clear image of just what the difference looks like. The simple fact is, Blu-ray trounces DVD in terms of resolution. In the end, you can decide what you think about all of the facts. And, if you’re ready to buy…you’re still in the right place. I’m going to give you the skinny on the format differences. So if you just want to know, well, you’ve come to the right spot. Or you may be deciding whether to upgrade to that new 1080p Blu-ray player. (Believe it or not there are still a few of my friends who have yet to upgrade to Blu-ray.) It doesn’t really matter, because the end result is that the question of Blu-ray vs DVD is a good one, but the differences are actually interesting and compelling. So you may be here wanting to know the big differences between Blu-ray and DVD.
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