LectureChat: Hybrid RAG over Wikipedia and Multilingual Lectures
Abstract
LectureChat extends the WikiChat conversational AI system by integrating multilingual university lecture transcripts alongside
Wikipedia content. The demo showcases a dual retrieval architecture that combines structured encyclopedic knowledge with academic lecture
material, leveraging multiple segmentation strategies and cross index reconciliation to improve retrieval quality. The system maintains separate
citation spaces for Wikipedia (numeric) and lectures (alphabetic) and preserves temporal provenance for direct video navigation. We present
the overall architecture, interaction flow, implementation details, and a reproducibility plan.
Mehr zum Titel
| Titel | LectureChat: Hybrid RAG over Wikipedia and Multilingual Lectures |
|---|---|
| Medien | The 48th European Conference on Information Retrieval (ECIR 2026), Delft, The Netherlands, March 28-April 3, 2026 |
| Verlag | Springer Nature |
| Verfasser | Markos Dimitsas, Prof. Dr. Jochen L. Leidner |
| Veröffentlichungsdatum | 2026-03-28 |
| Projekttitel | VoLL-KI |
| Zitation | Dimitsas, Markos; Leidner, Jochen L. (2026): LectureChat: Hybrid RAG over Wikipedia and Multilingual Lectures. The 48th European Conference on Information Retrieval (ECIR 2026), Delft, The Netherlands, March 28-April 3, 2026. |