Abstract Summary
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.
