Fraunhofer is (by now) only financed 30% through tax money and 70% comes from the royalties on their past developments like MP3 and H264 and H265 and MPEG-H.

Anyway, Fraunhofer gets recurring tax funding. What voize got is a one-off research grant to a group of companies:

- voize

- Charité - Universitätsmedizin Berlin (a medical university)

- Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, Berlin (a government AI research lab)

- Connext Communication GmbH, Paderborn (a tech company)

- Kleeblatt Pflegeheime gGmbH, Ludwigsburg (a retirement home, i.e. potential end user)

- Pflegewohnhaus am Waldkrankenhaus gGmbH, Berlin (another retirement home)

For this grant type, it's quite common that you pay the inventors, some assistant companies, some researchers, and some end users a lump sum to force them all to work together on commercializing the invention.