DVDs, Blu-ray discs, and 4K UHD discs are different optical disc formats that store and play back video content. The main differences lie in their storage capacity and video resolution.
DVDs can store up to 4.7 GB on a single-layer disc or 8.5 GB on a dual-layer disc, and they support video resolutions up to 720p or 1080i. Blu-ray discs, on the other hand, can store 25 GB on a single-layer disc or 50 GB on a dual-layer disc, and they support full 1080p high-definition video. 4K UHD discs take things a step further, with storage capacities ranging from 50 GB to 100 GB and the ability to deliver 4K video resolution, which is four times the pixel count of 1080p. This means 4K UHD discs can provide an incredibly detailed and lifelike image quality, with sharper details, richer colors, and superior contrast compared to standard Blu-ray. While 4K streaming is an option, 4K UHD discs consistently offer superior video quality due to their higher bitrate and lack of compression artifacts. Overall, 4K UHD is the latest and most advanced optical disc format, offering the best possible visual experience for home entertainment.