ISCA Archive Eurospeech 1997
ISCA Archive Eurospeech 1997

Modelling inter-frame dependence with preceeding and succeeding frames

Philip Hanna, Ji Ming, Peter O'Boyle, F. Jack Smith

This paper explores the modelling of inter-frame dependence as a means of improving the performance of HMMs. More specifically, a model based on the IFD- HMM (Ming & Smith, 1996) that assumes a dependency upon both succeeding and preceeding frames is proposed. The means by which a dependency upon succeeding frames might be integrated into a HMM framework are explored, and a mathematical outline of the proposed extension given. The results of various tests aimed towards exploring the consequences of introducing succeeding frame dependencies are included. It was found that a dependency upon succeeding frames enabled dynamic spectral information, not found in the preceeding frames, to be usefully employed; resulting in a significant increase in the recognition accuracy. Additionally, it was shown that modelling of the dynamic spectral information (using time-lag sequences) was at least as important as improved modelling of the instantaneous spectra (using multiple mixtures).


doi: 10.21437/Eurospeech.1997-15

Cite as: Hanna, P., Ming, J., O'Boyle, P., Smith, F.J. (1997) Modelling inter-frame dependence with preceeding and succeeding frames. Proc. 5th European Conference on Speech Communication and Technology (Eurospeech 1997), 1167-1170, doi: 10.21437/Eurospeech.1997-15

@inproceedings{hanna97_eurospeech,
  author={Philip Hanna and Ji Ming and Peter O'Boyle and F. Jack Smith},
  title={{Modelling inter-frame dependence with preceeding and succeeding frames}},
  year=1997,
  booktitle={Proc. 5th European Conference on Speech Communication and Technology (Eurospeech 1997)},
  pages={1167--1170},
  doi={10.21437/Eurospeech.1997-15},
  issn={1018-4074}
}