On the surface, 4K Blu-ray seems like an uncomplicated format, but that’s not the case. What you might not be aware is the fact that there are two totally different discs that 4K Blu-ray movies get printed on. A lot of it boils down to the size of the movie, but the two different formats you see are 66 GB dual-layer discs and 100 GB triple-layer discs. Both disc sizes can fit movies, and I would wager that most people don’t notice the difference between the two.
Under the surface, there are some key advantages offered by these 100 GB discs, and it’s a big reason why you see cinephiles applaud when the bigger disc is used. People tend to view 66 GB discs as a cost-cutting measure, and it’s similar to what you see with things like the Nintendo Switch when developers opt to use a game-key card instead of an actual cartridge. That might be true, but don’t think that a 66 GB disc can’t look great, because they certainly can.
The case for a 100 GB 4K Blu-ray disc
There’s a good reason
If you see a 100 GB 4K Blu-ray disc, it’s something you should celebrate if you value quality over everything. By having that extra space, movies can take advantage of an increased bitrate. Bitrate is something you see talked about with streaming, but it applies to discs as well. A higher bitrate on a disc means there’s less visual artifacting, less compressed audio, and an overall better looking picture. That doesn’t mean 66 GB discs suffer from this, mind you, but it means a 100 GB disc looks better than a 66 GB more often than not.
Physical media is known for its quality, and a higher bitrate is the pathway toward that. Audio especially benefits from having a high bitrate, and you’ll find that Dolby Atmos sounds great the higher the number goes. Now, the downside to knowing this is that there’s not a lot you can do to make sure you’re getting a 100 GB disc. You’re at the whims of a production company, and even if you’re well aware that a bigger disc is better, you just have to hope the company uses it. On the bright side, I haven’t come across a 66 GB that looks bad because of its limitations. It’s just that performance is being left on the table by opting for the smaller disc.
No matter the disc size, it’s going to come out well ahead of what streaming offers, even with a regular Blu-ray disc. It’s just that the 100 GB disc does it better than the rest, but you can’t always guarantee you’re getting one. Ultimately, I don’t think it’s a huge thing to worry about. Instead, I think it’s something to be excited about because you know a 100 GB disc is going to bring a high-quality viewing experience, and that’s always something to be happy about if you have a nice TV and sound system at home.
There are some possible downsides to a 100 GB disc
Something to be aware of
While 100 GB discs are the best quality available, that doesn’t mean every Blu-ray player can handle them. Bear in mind that this is very much a situation where your mileage may vary, but my Sony UBP-X700M has issues dealing with triple-layer discs from time to time. Sometimes it can brute force its way through when there’s a layer switch, but sometimes it freezes completely. There’s really no rhyme or reason behind it, and each of the discs it has problems with look perfectly fine, so I don’t know what the deal is. I do know that this doesn’t happen at all with my 66 GB discs, so it’s a puzzling one.
People with the same player as me don’t run into the problems like I do, so I don’t have a good answer as to why it happens. What I do know is that you can look online and see other people have the same issues, so it’s not isolated to just me. Despite those problems, I don’t let 100 GB discs stop me because it’s not a guaranteed issue. However, when I run into a disc that does have this problem — Oppenheimer and Top Gun Maverick are two examples I have — it happens it every time. There’s a spot in both of those movies where the disc freezes no matter what, so it’s something I have to be aware of. Aside from that, despite how devastating it sounds, 100 GB discs are great when companies opt for them.
You just have to keep your fingers crossed and hope these issues don’t happen to you. It’s a bummer that I have to watch Oppenheimer on regular Blu-ray to ensure I don’t have problems, but it’s the way it’s played out for me.
