Welcome to the 30th ACM International Conference on Multimedia. ACM Multimedia is since its inception in 1993, the worldwide premier conference and a key world event to display scientific achievements and innovative industrial products in the multimedia field. This year, ACM Multimedia 2022 will be held in Lisbon, Portugal. At ACM Multimedia 2022, after a long period of worldwide confinements and hardships this year we expect to welcome you all in Lisbon for an extensive program consisting of technical sessions covering all aspects of the multimedia field via oral, video and poster presentations, tutorials, panels, exhibits, demonstrations, workshops, doctoral symposium, multimedia grand challenge, brave new ideas on shaping the research landscape, open source software competition, and also an interactive arts program. We will also continue to support the industrial track to recognize those research works with significant industrial values. We welcome submissions from several field such as multimedia, multimedia retrieval, machine learning, artificial intelligence, vision, data sciences, HCI, multimedia signal processing, as well as healthcare, education, entertainment and beyond.