Efficient Combination of N-gram Language Models and Recognition Grammars in Real-Time LVCSR Decoder
The paper presents a method for incorporation of regular grammars into n-gram language models.Such composite model then benefits from both language modeling formalisms-a grammar yields robust probability estimates for well-defined phrases with fixed structure whereas the n-gram provides better coverage of casual speech.Moreover,the grammar allows adding new words to the phrase pattern while taking advantage of the existing structural (context) information.The proposed method for grammar incorporation allows the use of combined models in our in-house real-time decoder which is designed to work only with standard n-gram language model.The performance of the combined model was tested in the dictation task where a simple grammar was designed for date entries.A statistically significant improvement of WER was achieved.
Ales Prazák Pavel Ircing Jan Svec Josef Psutka
SpeechTech s.r.o.Plzeň,Czech Republic Department of Cybernetics,University of West Bohemia Plzeň,Czech Republic
国际会议
9th International Conference on Signal Processing(第九届国际信号处理学术会议)(ICSP08)
北京
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）