Abstract
This paper describes recent activities of quality assessment in the fields of audio, video and multimedia information by focusing on some relevant works in International Telecommunication Union as subsidiary of the United Nations, including International Electrotechnical Commission and Video Quality Experts Group. For quality assessment of audio in, it is know that a shift to lower quality; for video, a new activity on reduced reference/no reference TV test; and for multimedia, targeting on emerging media on PC displays and mobile terminals.