Since 4K movies arrived on the scene, there have been websites devoted to telling consumers whether or not any particular film was transferred to UHD Blu-ray in “real” or “fake” 4K resolution. Well, what if I told you that you should simply disregard those websites and blogs entirely? Would you defend what they have to say?
Most would probably say that they would defend those sites/blogs because they do not want to get “ripped off” by purchasing something they believed to be something else.
However, you really should disregard those “real” vs “fake” 4K lists. They are doing nothing more than hurting the already niche market for UHD Blu-rays as a whole.
What is “Fake” 4K Anyways?
When a film is toted as having a “fake” 4K presentation, what that really means is that the film was upscaled to 4K from what is known as a “2K Digital Intermediate“ (or 2KDI).
For a good example of an upscaled movie that utilized a 2KDI, then check out our review of Mary Poppins Returns on UHD Blu-Ray.
2KDI is an industry term that means the piece of media in question was mastered, graded, and edited at a resolution of 2048×1080 (sometimes more vertical pixels depending on aspect ratio).
When all the editing, sound, effects, and other work is done, the film is then upscaled to 4K for release.
Why Do Some Films Utilize a 2KDI?
There are several reasons to utilize a 2KDI when transferring any particular film to UHD. The most common reasons include:
- A Large Number of Computer Generated Effects
When a piece of video media has a large number of CGI effects throughout, it will often utilize a 2KDI. The reason for that is that it would take the large server farms that are used to render the effects a considerably longer period of time to finish their job. Since it takes a lot longer, that means that those servers will not be able to make room to render other media. That being said, there are studios out there that will render in native 4K at all production phases of the process (Netflix, for example).
- The Media Was Filmed at Resolutions Smaller than 4K
Up until around 2010, most digitally recorded films were recorded at 2K resolutions. If the raw file for the film in question was not filmed at 4K or higher, then the film will have to go through an upscaling process to achieve a 4K presentation.
Why You Shouldn’t Let “Real” VS “Fake” 4K Websites Influence Your Media Purchasing Decisions
There are several technical advantages to upscaled 4K content. Some of the more prominent ones are as follows:
- Expanded color gamut over standard Blu-ray and DVD content
- 2KDIs are stiller higher resolution than standard 1080p presentations (2048×1080 vs 1920×1080)
- HDR (where used, it is still up to the director, but almost all UHD Blu-rays have one form of HDR or another)
- Higher bitrate datastreams that prevent artifacts (like “macroblocking”) with motion and color
- Better sound formats (sometimes, there are definitely Blu-ray discs out there that utilize the latest and greatest of sound formats and mixes)
When all is said and done, the final presentation of any piece of video media will always look better upscaled to 4K than it did in its original resolution (as far as digital media goes, analog film and whatnot is another discussion for another blog post in the future).
If even after all of that you still want to check to see if a film is presented in “Real” or “Fake” 4K, then check out Blu-Ray.com.