Recently discovered a number of movies on streaming services that are labeled as “HD.” Which, in terms of recent movies/video, I kind of get: a more realistic viewing experience. In terms of recent releases, หนัง HD can tell the difference between HD and SD versions of the same movie/video. But what does it mean when a film from 1945, 1950, or 1974 is listed as “HD”? Is it more than just a marketing ploy? Is there any way to improve the look of pre-HD movies through up scaling or other magical hand waving? Because you cannot honestly don’t see any progress. You may be thinking specifically of a couple of black-and-white films that you have seen.
High-Definition Video
A high definition video is a video of high quality. On the vast majority of screens, it will appear sharp and clear. Typically, HD refers to any video that is at least 720p, which means it has 720 vertical pixels or more.
UHD Video
UHD is an abbreviation for ultra-high definition. This video format is of extremely high quality and can be viewed on very large screens. UHD refers to 4K and 8K video, as well as any larger video format. In the context of online video, 4K refers to any video with at least 2,160 vertical pixels. Meanwhile, 8K video is defined as any video with at least 4,320 vertical pixel resolutions. One additional complication is that UHD formats are better defined for different screen sizes. One additional complication is that UHD formats are defined differently for different screen sizes. 4K content is typically streamed at 3,840 x 2,160p on a UHD TV in your home. This format will completely fill the screen and look razor-sharp. However, the Digital Cinema Initiatives define 4K at the cinema as having a horizontal resolution of 4,096 pixels and no vertical resolution.
Standard Definition (SD) vs. High Definition (HD)
In a nutshell, the number of pixels in the image on display distinguishes high definition from standard definition images. High-definition images have more pixels per square inch than standard-definition videos. Okay, but what exactly does that mean? This means that HD images can display far more fine detail than SD images. Here’s a quick analogy that should help explain why.
Assume you have a 35′′ card and have been asked to draw a flower on it. You can draw with one of two tools: a preschooler-type crayon (the really big ones) or a finely sharpened pencil. Because the crayon draws a much thicker line and you’re limited to the size of a 35′′ card, you won’t be able to include as much detail as you could with the pencil drawing. That’s similar to the difference between SD and HD images: the HD image has finer detail because it “draws” the image with smaller and more pixels than an SD image can. And its not that quickly! This is a very simplified example designed to help you understand the difference between HD and SD. In reality, the distinctions can be much more subtle.In reality, most of us will not notice the upgrade to HD quality most of the time.
Comments are closed.