Partly Hidden Markov Model and its application to speech recognition

Tetsunori Kobayashi*, Junko Furuyama, Ken Masumitsu

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


A new pattern matching method, Partly Hidden Markov Model, is proposed and applied to speech recognition. Hidden Markov Model, which is widely used for speech recognition, can deal with only piecewise stationary stochastic process. We solved this problem by introducing the modified second order Markov Model, in which the first state is hidden and the second one is observable. In this model, not only the feature parameter observations but also the state transitions are dependent on the previous feature observation. Therefore, even the complicated transient can be modeled precisely. Some simulational experiments showed the high potential of the proposed model. As the results of word recognition test, the error rate was reduced by 39% compared with normal HMM.

Original languageEnglish
Pages (from-to)121-124
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP-99) - Phoenix, AZ, USA
Duration: 1999 Mar 151999 Mar 19

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering


Dive into the research topics of 'Partly Hidden Markov Model and its application to speech recognition'. Together they form a unique fingerprint.

Cite this