Audio and visual and multimedia indexing, Multimodal and cross-modal indexing, Deep learning for multimedia analysis and indexing, Audio (speech, music, etc) and visual content analysis and understanding, Identification and tracking of semantic regions and events, Social media analysis, Metadata generation, coding and transformation, Activity recognition and event-based multimedia indexing, spiking neural networks, Multimedia information retrieval (image, audio, video, text), Mobile media retrieval, Event-based media retrieval, Affective/emotional interaction or interfaces for multimedia retrieval, Multimedia data mining and analytics, Multimedia retrieval for multimodal analytics and visualisation, Multimedia recommendation, Multimedia verification (e.g., multimodal fact checking, deep fake analysis), Large scale multimedia database management, Summarization, browsing and organization of multimedia content, Evaluation and benchmarking of multimedia retrieval systems, User interaction and relevance feedback, Multimedia interfaces, presentation and visualization tools, Personalization and content adaptation, Virtual, augmented and mixed reality interfaces for multimedia search, Applications of multimedia indexing and retrieval