Home Theater & Entertainment DVDs, DVRs & Videos 348 348 people found this article helpful How Does Standard DVD Upscaling Compare to Blu-ray? Sorting out the differences in image quality by Robert Silva Writer Robert Silva has written about audio, video, and home theater topics since 1998. Robert has written for Dishinfo.com, and made appearances on the YouTube series Home Theater Geeks. our editorial process Facebook Twitter LinkedIn Robert Silva Updated on October 29, 2020 DVDs, DVRs & Videos TV & Displays Audio DVDs, DVRs & Videos Tweet Share Email If your home theater movie collection has a mix of DVDs and Blu-ray Discs, you may wonder about the differences between DVD quality and Blu-ray Disc quality. Here's a primer about DVD upscaling and how the results compare to Blu-ray. Vichan Chairat / Getty Images The Evolution of DVDs The DVD format supports a natural video resolution of 720 x 480 (480i). When you put a disc into a DVD player, the player reads this resolution. Hence, DVD is classified as a standard resolution format. This worked well when the DVD format debuted in 1997, but DVD player manufacturers soon decided to improve DVD image quality. They implemented additional processing to the DVD signal after it was read off the disc but before it reached the TV. This process is called progressive scan. Progressive scan DVD players output the same resolution as other players but provide a smoother-looking image. Introduction of DVD Upscaling Although progressive scan improved image quality on compatible TVs, when HDTV came along, image quality needed more help. In response, DVD makers created a process called upscaling. Upscaling mathematically matches the pixel count of the DVD output signal to the physical pixel count on an HDTV, which is typically 1280 x 720 (720p), 1920 x 1080 (1080i or 1080p), or 3840 x 2160 (2160p or 4K). 720p represents 1,280 pixels displayed across the screen horizontally and 720 pixels down the screen vertically. This means there are 720 horizontal lines on the screen displayed progressively, or each line displayed following another.1080i represents 1,920 pixels displayed across a screen horizontally and 1,080 pixels down a screen vertically. This means there are 1,080 horizontal lines displayed alternately. All the odd lines are displayed, followed by all the even lines.1080p represents 1,080 horizontal lines displayed sequentially. This means all lines are displayed during the same pass.4K (or 2160p) represents 3,480 horizontal lines displayed sequentially. This means all lines are displayed during the same pass. The Practical Effect of DVD Upscaling Visually, for the average consumer, there's not much difference between 720p and 1080i. However, 720p delivers a slightly smoother-looking image because lines and pixels display in a consecutive pattern, rather than in an alternate pattern. Upscaling does a good job of matching the upscaled pixel output of a DVD player to the natural pixel display resolution of an HDTV, resulting in better detail and color consistency. However, upscaling can't convert standard DVD images into true high-definition (or 4K) images. Upscaling works best with fixed pixel displays, such as plasma, LCD, and OLED TVs. Results aren't always consistent on CRT-based HDTVs (there aren't too many of those still in use). Points to Remember About DVD Upscaling Here are a few things to keep in mind when working with a DVD player and a newer TV. Do I Need an Upscaling DVD Player? You can hook up any DVD player to an HDTV. Upscaling DVD players are better able to match the natural pixel resolution of an HDTV. Still, you may see good results on a standard DVD player that doesn't have progressive scan or upscaling capability when it's connected to an HDTV's provided component or S-video inputs. Most newer TVs don't have S-video inputs. Connecting a DVD Player to an HDTV If you have an HDTV (or 4K Ultra HD TV) and a standard DVD player, use the component video connection (red-blue-green) between the DVD player and the HDTV for best results. If your DVD player is progressive-scan capable, always use this option when connected to a progressive-scan capable TV. However, if your DVD player provides upscaling, it has an HDMI connection, so always use HDMI to access the DVD player's upscaling capabilities. True High-Definition Viewing DVD upscaling is only an approximation of the high-definition viewing experience. To get true high-definition viewing from a disc format, use Blu-ray Disc content with a Blu-ray player connected to an HDTV or 4K Ultra HD TV using HDMI. The Blu-ray Disc format supports 720p, 1080i, and 1080p resolutions. DVD Upscaling vs. Blu-ray An upscaled DVD, even when it's good, can't match the quality of a natural Blu-ray Disc source. Compared to Blu-ray Disc, an upscaled DVD tends to look flatter and softer, especially in the background. There's a difference when looking at reds and blues. With upscaled DVDs, reds and blues tend to override underlying detail. The same colors in Blu-ray are tight, with the detail visible under the color. Although an upscaling DVD player can only upscale DVD to 1080p, an Ultra HD TV accepts that signal and upscales it further to 4K. Blu-ray Makes Content Better All Blu-ray Disc players can upscale standard DVDs, provided the player is connected to an HDTV or 4K Ultra HD TV using the HDMI connection option. Some Blu-ray Disc players have built-in 4K upscaling for both DVD and Blu-ray Disc playback. If a Blu-ray Disc player doesn't provide this feature, the 4K Ultra HD TV further upscales the 1080p signal from the Blu-ray Disc player to 4K.