The Fraunhofer Heinrich Hertz Institute (HHI) is a research institute of the Fraunhofer Society, based in Berlin, Germany. It engages in applied research and development in physics, electrical engineering, and computer sciences. The institute focuses on innovations for the digital society, particularly in mobile and optical communication networks, fiber optical sensor systems, and video signal processing and coding. Fraunhofer HHI collaborates with international partners from research and industry to develop prototypes and solutions for digital infrastructure.