2. Sound Quality. Now let’s talk about sound quality. There is not necessarily such a thing as 4K audio, but the technology associated with sound in 4K means you get higher quality audio. In general, 4k discs offer more advanced audio formats like Dolby Atmos and DTS-X, which often aren’t offered on the regular Blu-Ray versions of the disc. Things got better with DVD, but not to the fullest extent. Old DVD players sold in the states might play PAL DVDs, but it's not a requirement. Newer DVD players do, Blu-ray players just play everything (23.98 up to 59.97 Hz) as long as the disc itself is codefree. The Blu-ray Disc device or Blu-ray optical drive can play Blu-ray Discs purchased in the same region. This means that a computer or a Blu-ray Disc player purchased in countries listed in Region A can only play Blu-ray Disc that are recorded in Region A, in exception to Region-Free discs and players. Honest. And a good 4K UHD Blu-ray player will make the best of your cherished old collection of HD Blu-rays or even (whisper it) DVDs. The upscaling capabilities of the best players have to be Sony UBP-X800M2. Another top-of-the-line Blu-ray player loaded with useful features, this Sony model is great for folks who mainly want their library of UHD discs and 1080p Blu-rays to look their best on a 4K TV. And it’s got HDR-to-SDR conversion, so movies will look great even on older televisions. However, Ultra HD Blu-ray Disc players can play standard Blu-ray discs, DVDs, and CDs, and most can stream internet content. Blu-ray and Ultra HD-Blu-ray can also be used with 4K Ultra HD TVs . Learn what you need to know before buying a Blu-ray player , what types of Blu-ray players are best , and how to set up a Blu-ray player. In the terms of the capacity, HD DVDs can store up to 15GB on a single layer while Blu-ray can hold 25GB on one layer. In the terms of encoding, HD DVD supports VC-1, H.264 and MPEG-2, while Blu-ray supports H.262/MPEG-2 Part 2, H.264/MPEG-4 AVC and VC-1 H.265, which brings better image quality than DVD. You can find Blu-ray is better than HD Shop Panasonic Streaming 4K Ultra HD Hi-Res Audio with Dolby Vision 7.1 Channel DVD/CD/3D Wi-Fi Built-In Blu-Ray Player, DP-UB820-K Black at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up. Price Match Guarantee. Blu-ray collection: 529. DVD collection: 138. One of my blu players, my cheap sony bdp-1100, has lasted 2 years so far and that's playing it every single day. It has serious mileage on it so, it really just depends on the optical drive. Sometimes you get a great one and sometimes you get a lemon! With a 4k Blu-ray Player, you shold be able to play a 4k Blu-ray disc from anywhere in the world. With that being said, it’s important to understand that standard Blu-ray and DVD discs retain their region-coding on 4k Blu-ray Players, so you will not be able to play foreign Blu-ray or DVD discs on a 4k Player unless it’s a region-free model. hXrazc.