Ask HN: FaceTime using generative models on low-quality calls?

Hi, I was in a call two minutes ago with two friends and my Wi-Fi connection was acting, so the call quality dropped a lot and lost connectivity for a few seconds—after it reconnected, I instantly realized that the low-framerate video feeds of my friends were using some sort of generative model, it was as if they were “DeepFake”ing themselves! I didn’t find anything on the internet regarding this nor I think Apple advertises this “feature”. The closest thing I’ve found is FaceTime Attention Correction, but this was quite obviously a neural network generating the video frames. Does anybody know what this is?