Content-based video parsing and indexing based on audio-visual interaction

A content-based video parsing and indexing method is presented in this paper, which analyzes both information sources (auditory and visual) and accounts for their inter-relations and synergy to extract high-level semantic information. Both frame- and object-based access to the visual information is employed. The aim of the method is to extract semantically meaningful video scenes and assign semantic label(s) to them. Due to the temporal nature of video, time has to be accounted for. Thus, time-constrained video representations and indices are generated. The current approach searches for specific types of content information relevant to the presence or absence of speakers or persons. Audio-source parsing and indexing leads to the extraction of a speaker label mapping of the source over time. Video-source parsing and indexing results in the extraction of a talking-face shot mapping over time. Integration of the audio and visual mappings constrained by interaction rules leads to higher levels of video abstraction and even partial detection of its context