In fact, the picture quality of Friends filmed in 1990s is 1080P, but wasn't the Blu-ray standard set in 2003?

At that time, it was not a digital camera, but film. Later, after digital printing, the film can be converted into images of various resolutions. Relatively speaking, the film is awesome. If you want 4 K, you may be able to hand it over to you. You can take out your old photos and scan them with a high-definition scanner to get super-resolution photos. The effect is quite good. So the original data saved by the old film camera is very clear. After digital conversion, it's easy to pull it to 1080P, and it can maintain good clarity.

In addition, Blu-ray refers to the optical disc format introduced by Sony in the PS3 era, with capacities ranging from 25g to 50g. A Blu-ray disc can just hold a video with a resolution of 1080p, which can be seen clearly on TV. If the film is unclear, the resolution is the first, followed by the code rate, that is, how big the file is in one second. The original Blu-ray disc has the largest bit rate. Now the so-called Blu-ray versions we see on the Internet are all compressed with 1080p resolution, but the bit rate is very small. But relatively speaking, it is still very beautiful. You can compare the dynamic action scenes, and the picture quality is obviously different at different bit rates.