Mathias Wien
RWTH Aachen University (Germany)
MPEG AG5 Visual Quality Assessment: Testing, Guidelines and Metrics
Language: English
Date: October 27th / 13h30 – 14h45 (UTC-3)
Abstract
The Advisory Group on MPEG Visual Quality Assessment (ISO/IEC JTC1 SC29/AG5) has been founded in 2020 with the goal to select and design subjective quality evaluation methodologies and objective quality metrics for the assessment of visual coding technologies in the context of the MPEG standardization work. This talk will provide an overview on current activities in AG5 including verification testing, remote experts viewing and explorations on quality metrics for conventional and immersive visual media. Insights on the design and the conduction of verification tests will be given by the example of the latest joint video coding standard of ITU-T and ISO/IEC, Versatile Video Coding (VVC). The developments towards remote experts viewing for MPEG visual quality assessment will be detailed. These have been pursued to enable continuation of standardization work subject to the continuing pandemic situation. The talk further provides an overview on ongoing studies for assessment of the quality of immersive visual media in the context of MPEG standardization work. Since the immersive nature of and the possibility of interaction with the content requires a synthesized presentation to the viewer, quality assessment for this type of content requires specific considerations of references and user behavior.
Biography
Mathias Wien received the Diploma and Dr.-Ing. degrees from Rheinisch-Westfälische Technische Hochschule Aachen (RWTH Aachen University), Aachen, Germany, in 1997 and 2004, respectively. Since July 2018, he is with Lehrstuhl für Bildverarbeitung, RWTH Aachen University (head: Prof. Dorit Merhof) as the leader of the Visual Media Communication group, and head of administration. His research interests include image and video processing, immersive, space-frequency adaptive and scalable video compression, robust video transmission, and visual quality assessment.
Since 2020, Mathias serves as Convenor of ISO/IEC JTC1 SC29/AG5 “MPEG Visual Quality Assessment”. Mathias has been an active contributor to H.264/AVC, HEVC, and VVC. He has participated and contribute to ITU-T VCEG, ISO/IEC MPEG, the Joint Video Team (JVT), the Joint Collaborative Team on Video Coding (JCT-VC), and the Joint Video Experts Team (JVET) of VCEG and ISO/IEC MPEG. He currently serves as a co-chair of JVET AdHoc Group 4 “Test material and visual assessment” and as a coordinator for the JVET Verification Tests of VVC. Mathias has published more than 70 scientific articles and conference papers in the area of video coding and has co-authored several patents in this area.