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Title: Fast browsing of speech material for digital library and distance learning
Authors: Wong, Hon Wah
Au, Oscar C.
Keywords: Digital library
Distance learning
Retrieval techniques
Fast browsing
Time scale modification
Issue Date: 1998
Citation: Proceedings of the 1998 IEEE International Symposium on Circuits and Systems, ISCAS 98, 31 May-3 June 1998, Monterey, CA, vol. 3, p. 615-618
Abstract: In digital library and distance learning applications, one usually needs to search through lots of speech materials. While content-based retrieval techniques can help to identify possible matching items, the person would usually need to browse through the items quickly before making decisions on whether the items are useful or not. As a result, fast speech browsing techniques are highly desirable.In this paper, we discuss problems of fast playback of speech materials and overview some existing time scale modification (TSM) techniques. We propose some novel modifications of TSM to make it much more effective in fast browsing of speech materials, especially those with irregular speech tempo. The proposed algorithm includes silent period removal, gain equalization and locally adaptive TSM. Simulation results show that the proposed algorithm can increase the intelligibility of the fast playbacked speech materials significantly
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