Content Based Lecture Video Retrieval Using Speech and Video Text Information.
Haojin YangChristoph MeinelPublished in: IEEE Trans. Learn. Technol. (2014)
Keyphrases
- lecture videos
- text information
- video indexing
- image retrieval
- multimedia
- video segments
- video analysis
- video data
- hybrid learning
- semantic content
- textual information
- web images
- user experience
- term frequency
- visual cues
- relevance feedback
- video retrieval
- learning objects
- information retrieval
- keywords
- video sequences
- retrieval systems
- multimedia databases
- video content
- image database
- retrieval model
- visual content
- complex background
- high definition
- test collection
- query expansion
- information retrieval systems
- key frames
- video streams
- news video
- image annotation
- tf idf
- video frames
- visual information
- event detection
- video surveillance