Abstract for james_icassp94

To appear in Proc. ICASSP 1994, Adelaide, Australia.

A FAST LATTICE-BASED APPROACH TO VOCABULARY INDEPENDENT WORDSPOTTING

D. A. James & S. J. Young

1994

Practical applications of wordspotting, such as spoken message retrieval and browsing, require the ability to process large amounts of speech data at speeds many times faster than real-time. This paper presents a novel approach to this problem in which all of the stored audio material is preprocessed off-line to generate a phoneme lattice. At search time, putative word matches are found in this lattice using symmetric dynamic programming. The paper presents the details of the algorithms used and compares performance with a number of conventional approaches using a 20 keyword vocabulary on the DARPA Resource Management Task. The results show that the proposed method is very much faster yet performs acceptably compared to conventional systems which depend on keyword-specific training or prior knowledge of the test set vocabulary.


(ftp:) james_icassp94.ps.Z (http:) james_icassp94.ps.Z
PDF (automatically generated from original PostScript document - may be badly aliased on screen):
  (ftp:) james_icassp94.pdf | (http:) james_icassp94.pdf

If you have difficulty viewing files that end '.gz', which are gzip compressed, then you may be able to find tools to uncompress them at the gzip web site.

If you have difficulty viewing files that are in PostScript, (ending '.ps' or '.ps.gz'), then you may be able to find tools to view them at the gsview web site.

We have attempted to provide automatically generated PDF copies of documents for which only PostScript versions have previously been available. These are clearly marked in the database - due to the nature of the automatic conversion process, they are likely to be badly aliased when viewed at default resolution on screen by acroread.