On 20 October 2026, the Faculty of Data Science of City University of Macau, City University of Hong Kong and Zhuhai 4Dage Technology Co., Ltd. jointly hosted an academic workshop for academic exchanges on cutting-edge research areas including multimedia computing, 3D vision and artificial intelligence. Prof. Shiqi Wang, Associate Dean and Professor of the Department of Computer Science, College of Computing, City University of Hong Kong, Assistant Professor Xiangjie Sui from the Faculty of Data Science of City University of Macau, Mr. Shiting Xu, Deputy General Manager of Siwei Shidai Network Technology Co., Ltd., together with faculty members and students from relevant fields, attended the event.
During the workshop, Prof. Shiqi Wang delivered the APSIPA Distinguished Lecture entitled Compact Gaussian Representations for Volumetric Video: From Static Scenes to Dynamic Avatars. He shared his team’s latest research achievements in data compression and high-fidelity rendering concerning the application of Gaussian representations in volumetric video, dynamic scenes and digital avatar construction.
In the lecture, Prof. Shiqi Wang presented his team’s latest progress on compact Gaussian representations. For static scenes, the team explores predictive relationships among Gaussian primitives and integrates rate constraints into representation optimization to reduce spatial redundancy while preserving rendering quality. For dynamic scenes, temporal correlation is leveraged to predict scene changes, and only compact temporal update data is transmitted to improve the coding and transmission efficiency of volumetric video.
Prof. Shiqi Wang noted that compact volumetric video representations are closely tied to content structures. Joint exploitation of correlations across spatial, temporal, human-joint, semantic and feature dimensions can reduce data rates while maintaining high-quality rendering, offering new technical insights for immersive communication, virtual reality, digital avatars and 3D content delivery.
The workshop featured a vibrant academic atmosphere. Participating faculty and students exchanged views and discussed questions actively on topics such as Gaussian representations, volumetric video compression and digital avatar technologies. Drawing on Siwei Shidai’s practical experience in cultural heritage digitization, Deputy General Manager Shiting Xu held an online discussion with faculty and students from the two universities on 3D reconstruction for cultural heritage scenarios, digital content presentation and relevant technology deployment, providing concrete use cases for bridging academic research and industrial practice.
This workshop served as a valuable academic platform for faculty and students to learn about the state-of-the-art advances in volumetric video, Gaussian representations and digital avatar technologies. It further fostered exchanges between higher education institutions in the Guangdong-Hong Kong-Macao Greater Bay Area and industry in artificial intelligence and multimedia computing, and deepened mutual understanding between academia and enterprises on 3D digitization for cultural heritage applications.
