Showing papers by "Timothy J. Hazen published in 1999"
15 Mar 1999
TL;DR: This paper describes the experiences with developing a real-time telephone-based speech recognizer as part of a conversational system in the weather information domain and describes the development of the recognizer vocabulary, pronunciations, language and acoustic models for this system.
Abstract: This paper describes our experiences with developing a real-time telephone-based speech recognizer as part of a conversational system in the weather information domain. This system has been used to collect spontaneous speech data which has proven to be extremely valuable for research in a number of different areas. After describing the corpus we have collected, we describe the development of the recognizer vocabulary, pronunciations, language and acoustic models for this system, the new weighted finite-state transducer-based lexical access component, and report on the current performance of the recognizer under several different conditions. We also analyze recognition latency to verify that the system performs in real-time.
87 citations
01 Jan 1999
TL;DR: Improved pronunciation modeling and context-dependent segment models and improved pronunciation modeling are shown to reduce word error rates in a telephone-based, conversational system by over 18%, while the technique of Gaussian selection reduces overall computation by more than a factor of two.
Abstract: In this paper we report on some recent improvements on the acoustic modeling in a segment-based speech recognition system Context-dependent segment models and improved pronunciation modeling are shown to reduce word error rates in a telephone-based, conversational system by over 18%, while the technique of Gaussian selection reduces overall computation by more than a factor of two
34 citations