@article{ART003280385},
author={SeongHun Kim and Oh-Gyu Kwon and Seong-Guk Nam and Seung-Cheol Lee and Tae-Young Yang and Jae-Woo Ryu and Chang-Hyeon Park},
title={Implementation of a Smart Lecture Video Generation System Using Open Source AI},
journal={Journal of The Korea Society of Computer and Information},
issn={1598-849X},
year={2025},
volume={30},
number={12},
pages={73-85}
TY - JOUR
AU - SeongHun Kim
AU - Oh-Gyu Kwon
AU - Seong-Guk Nam
AU - Seung-Cheol Lee
AU - Tae-Young Yang
AU - Jae-Woo Ryu
AU - Chang-Hyeon Park
TI - Implementation of a Smart Lecture Video Generation System Using Open Source AI
JO - Journal of The Korea Society of Computer and Information
PY - 2025
VL - 30
IS - 12
PB - The Korean Society Of Computer And Information
SP - 73
EP - 85
SN - 1598-849X
AB - In this study, we propose an open-source AI-driven lecture video generation system that automatically produces instructional videos from university lecture materials. The proposed system integrates large language models (LLMs) and retrieval-augmented generation (RAG) to generate lecture scripts, synthesize speech through text-to-speech (TTS), and create lip-synced digital human videos in a unified pipeline. To construct a domain-specific knowledge base, lecture materials were collected from two Korean universities. Using the LangChain framework, the system connects HyperCLOVA X SEED 3B with a RAG module to generate lecture scripts tailored to an instructor’s intent. The generated scripts are then processed by GPT-SoVITS for TTS synthesis and by a digital-human rendering module to produce realistic lecture videos. Experimental results show that integrating RAG improves performance over an LLM-only baseline by 5.6% in BERTScore, 3.3% in ROUGE-L, and 3.6% in BLEU. These improvements indicate that the proposed RAG structure enhances factual accuracy and logical consistency by referencing definitional and exemplar statements from external knowledge bases. This work demonstrates that even without fine-tuning, a RAG-based approach can be effectively applied to educational LLMs. It also provides foundational technology for future AI-driven smart-education platforms.
KW - LLM;RAG;Edutech;Open Source AI;Synthesis AI
DO -
UR -
ER -
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu and Chang-Hyeon Park. (2025). Implementation of a Smart Lecture Video Generation System Using Open Source AI. Journal of The Korea Society of Computer and Information, 30(12), 73-85.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu and Chang-Hyeon Park. 2025, "Implementation of a Smart Lecture Video Generation System Using Open Source AI", Journal of The Korea Society of Computer and Information, vol.30, no.12 pp.73-85.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu, Chang-Hyeon Park "Implementation of a Smart Lecture Video Generation System Using Open Source AI" Journal of The Korea Society of Computer and Information 30.12 pp.73-85 (2025) : 73.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu, Chang-Hyeon Park. Implementation of a Smart Lecture Video Generation System Using Open Source AI. 2025; 30(12), 73-85.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu and Chang-Hyeon Park. "Implementation of a Smart Lecture Video Generation System Using Open Source AI" Journal of The Korea Society of Computer and Information 30, no.12 (2025) : 73-85.
SeongHun Kim; Oh-Gyu Kwon; Seong-Guk Nam; Seung-Cheol Lee; Tae-Young Yang; Jae-Woo Ryu; Chang-Hyeon Park. Implementation of a Smart Lecture Video Generation System Using Open Source AI. Journal of The Korea Society of Computer and Information, 30(12), 73-85.
SeongHun Kim; Oh-Gyu Kwon; Seong-Guk Nam; Seung-Cheol Lee; Tae-Young Yang; Jae-Woo Ryu; Chang-Hyeon Park. Implementation of a Smart Lecture Video Generation System Using Open Source AI. Journal of The Korea Society of Computer and Information. 2025; 30(12) 73-85.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu, Chang-Hyeon Park. Implementation of a Smart Lecture Video Generation System Using Open Source AI. 2025; 30(12), 73-85.
SeongHun Kim, Oh-Gyu Kwon, Seong-Guk Nam, Seung-Cheol Lee, Tae-Young Yang, Jae-Woo Ryu and Chang-Hyeon Park. "Implementation of a Smart Lecture Video Generation System Using Open Source AI" Journal of The Korea Society of Computer and Information 30, no.12 (2025) : 73-85.
