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An Overview of the SPRACH System for the Transcription of Broadcast News

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • James Christie
  • Dan Ellis
  • Eric Fosler-Lussier
  • Yoshihiko Gotoh
  • Brian Kingsbury
  • Nelson Morgan
  • Steve Renals
  • Tony Robinson
  • Gethin Williams

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Original languageEnglish
Title of host publicationProceedings of the 1999 DARPA Broadcast News Workshop
Publication statusPublished - 1999
EventDARPA Broadcast News Workshop - Hilton at Washington Dulles Airport, Herndon, VA, United States
Duration: 28 Feb 19993 Mar 1999


WorkshopDARPA Broadcast News Workshop
CountryUnited States
CityHerndon, VA


This paper describes the SPRACH system developed for the 1998 Hub-4E broadcast news evaluation. The system is based on the connectionist-HMM framework and uses both recurrent neural network and multi-layer perceptron acoustic models. We describe both a system designed for the primary transcription hub, and a system for the less-than 10 times real-time spoke. We then describe recent developments to CHRONOS, a time-first stack decoder. We show how these developments have simplified the evaluation system, and led to significant reductions in the error rate of the 10x real-time system. We also present a system designed to operate in real-time with negligible search error.


DARPA Broadcast News Workshop


Herndon, VA, United States

Event: Workshop

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