Paper: Searching The Audio Notebook: Keyword Search In Recorded Conversation

ACL ID H05-1119
Title Searching The Audio Notebook: Keyword Search In Recorded Conversation
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2005
Authors

MIT’s Audio Notebook added great value to the note-taking process by retaining audio record- ings, e.g. during lectures or interviews. The key was to provide users ways to quickly and easily access portions of interest in a recording. Sev- eral non-speech-recognition based techniques were employed. In this paper we present a system to search directly the audio record- ings by key phrases. We have identified the user requirements as accurate ranking of phrase matches, domain independence, and reasonable response time. We address these requirements by a hybrid word/phoneme search in lattices, and a supporting indexing scheme. We will in- troduce the ranking criterion, a unified hybrid posterior-lattice representation, and the index- ing algorithm for hybrid lattices. We present results for...