Here’s what your Blu-ray player’s 4K upscaler is really doing

If you’re anything like me, you probably have quite a few legacy 1080p Blu-ray discs and 480p DVDs lying around in your physical media collection. On the surface, these discs are fairly antiquated by 2026 standards, barely holding a candle to the higher resolution of 4K Ultra HD (UHD) Blu-ray discs.