An Overview of the SPRACH System for the Transcription of Broadcast News
Gary Cook; James Christie; Daniel P. W. Ellis; Eric Fosler-Lussier; Yoshi Gotoh; Brian Kingsbury; Nelson Morgan; Steve Renals; Tony Robinson; Gethin Williams
- An Overview of the SPRACH System for the Transcription of Broadcast News
Ellis, Daniel P. W.
- Electrical Engineering
- Permanent URL:
- Book/Journal Title:
- Proceedings of the DARPA Broadcast News Workshop, February 28-March 3, 1999, Hilton at Washington Dulles Airport, Herndon, Virginia
- Information Technology Laboratory, National Institute of Standards and Technology
- Publisher Location:
- Gaithersburg, MD
- 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.
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