Apple recently launched an innovative image and video generation technology called Matryoshka Diffusion Models (MDM), aptly named the 'Nested Diffusion Model'. MDM employs a groundbreaking approach that processes images at different resolutions simultaneously, achieving seamless generation from low-resolution sketches to high-definition details. The core technical concept is similar to Russian nesting dolls, where each layer contains a smaller but fully functional substructure. The core architecture of this innovative method is referred to as Nested.