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Knowledge-BasedWord Lattice Rescoring in a Dynamic Context

Shore, Todd and Faubel, Friedrich and Helmke, Hartmut and Klakow, Dietrich (2012) Knowledge-BasedWord Lattice Rescoring in a Dynamic Context. InterSpeech 2012, 09.09.-13.09.2012, Portland, Oregon USA.

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Abstract

Recent advances in automatic speech recognition (ASR) technology continue to be based heavily on data-driven methods, meaning that the full benefits of such research are often not enjoyed in domains for which there is little training data. Moreover, tractability is often an issue with these methods when conditioning for long-distance dependencies, entailing that many higher-level knowledge sources such as situational knowledge cannot be easily utilized in classification. This paper describes an effort to circumvent this problem by using dynamic contextual knowledge to rescore ASR lattice output using a dynamic weighted constraint satisfaction function. With this method, it was possible to achieve a roughly 80% reduction in WER for ASR in the context of an air traffic control scenario.

Document Type:Conference or Workshop Item (Paper)
Title:Knowledge-BasedWord Lattice Rescoring in a Dynamic Context
Authors:
AuthorsInstitution or Email of Authors
Shore, ToddUni Saarland
Faubel, FriedrichUni Saarland
Helmke, HartmutHartmut.Helmke@dlr.de
Klakow, DietrichUni Saarland
Date:September 2012
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:lattice rescoring, knowledge-based, contextsensitivity
Event Title:InterSpeech 2012
Event Location:Portland, Oregon USA
Event Type:international Conference
Event Dates:09.09.-13.09.2012
Organizer:Center for Spoken Language Understanding, under the sponsorship of the International Speech Communication Association (ISCA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Effiziente Flugführung und Flugbetrieb (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Control > Controller Assistance
Deposited By: Kerstin Diederich
Deposited On:02 Jul 2012 10:51
Last Modified:02 Apr 2013 14:05

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