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Automatic Speech and Speaker Recognition: Large Margin and Kernel Methods

Joseph Keshet (Editor), Samy Bengio (Co-Editor)
ISBN: 978-0-470-69683-5
268 pages
February 2009
Automatic Speech and Speaker Recognition: Large Margin and Kernel Methods (0470696834) cover image
This book discusses large margin and kernel methods for speech and speaker recognition

Speech and Speaker Recognition: Large Margin and Kernel Methods is a collation of research in the recent advances in large margin and kernel methods, as applied to the field of speech and speaker recognition. It presents theoretical and practical foundations of these methods, from support vector machines to large margin methods for structured learning. It also provides examples of large margin based acoustic modelling for continuous speech recognizers, where the grounds for practical large margin sequence learning are set. Large margin methods for discriminative language modelling and text independent speaker verification are also addressed in this book.

Key Features:

  • Provides an up-to-date snapshot of the current state of research in this field
  • Covers important aspects of extending the binary support vector machine to speech and speaker recognition applications
  • Discusses large margin and kernel method algorithms for sequence prediction required for acoustic modeling
  • Reviews past and present work on discriminative training of language models, and describes different large margin algorithms for the application of part-of-speech tagging
  • Surveys recent work on the use of kernel approaches to text-independent speaker verification, and introduces the main concepts and algorithms
  • Surveys recent work on kernel approaches to learning a similarity matrix from data

This book will be of interest to researchers, practitioners, engineers, and scientists in speech processing and machine learning fields.

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List of Contributors.

Preface.

I Foundations.

1 Introduction (Samy Bengio and Joseph Keshet).

1.1 The Traditional Approach to Speech Processing.

1.2 Potential Problems of the Probabilistic Approach.

1.3 Support Vector Machines for Binary Classification.

1.4 Outline.

References.

2 Theory and Practice of Support Vector Machines Optimization (Shai Shalev-Shwartz and Nathan Srebo).

2.1 Introduction.

2.2 SVM and L2-regularized Linear Prediction.

2.3 Optimization Accuracy From a Machine Learning Perspective.

2.4 Stochastic Gradient Descent.

2.5 Dual Decomposition Methods.

2.6 Summary.

References.

3 From Binary Classification to Categorial Prediction (Koby Crammer).

3.1 Multi-category Problems.

3.2 Hypothesis Class.

3.3 Loss Functions.

3.4 Hinge Loss Functions.

3.5 A Generalized Perceptron Algorithm.

3.6 A Generalized Passive–Aggressive Algorithm.

3.7 A Batch Formulation.

3.8 Concluding Remarks.

3.9 Appendix. Derivations of the Duals of the Passive–Aggressive Algorithm and the Batch Formulation.

References.

II Acoustic Modeling.

4 A Large Margin Algorithm for Forced Alignment (Joseph Keshet, Shai Shalev-Shwartz, Yoram Singer and Dan Chazan).

4.1 Introduction.

4.2 Problem Setting.

4.3 Cost and Risk.

4.4 A Large Margin Approach for Forced Alignment.

4.5 An Iterative Algorithm.

4.6 Efficient Evaluation of the Alignment Function.

4.7 Base Alignment Functions.

4.8 Experimental Results.

4.9 Discussion.

References.

5 A Kernel Wrapper for Phoneme Sequence Recognition (Joseph Keshet and Dan Chazan).

5.1 Introduction.

5.2 Problem Setting.

5.3 Frame-based Phoneme Classifier.

5.4 Kernel-based Iterative Algorithm for Phoneme Recognition.

5.5 Nonlinear Feature Functions.

5.6 Preliminary Experimental Results.

5.7 Discussion: Canwe Hope for Better Results?

References.

6 Augmented Statistical Models: Using Dynamic Kernels for Acoustic Models (Mark J. F. Gales).

6.1 Introduction.

6.2 Temporal Correlation Modeling.

6.3 Dynamic Kernels.

6.4 Augmented Statistical Models.

6.5 Experimental Results.

6.6 Conclusions.

Acknowledgements.

References.

7 Large Margin Training of Continuous Density Hidden Markov Models (Fei Sha and Lawrence K. Saul).

7.1 Introduction.

7.2 Background.

7.3 Large Margin Training.

7.4 Experimental Results.

7.5 Conclusion.

References.

III Language Modeling.

8 A Survey of Discriminative Language Modeling Approaches for Large Vocabulary Continuous Speech Recognition (Brian Roark).

8.1 Introduction.

8.2 General Framework.

8.3 Further Developments.

8.4 Summary and Discussion.

References.

9 Large Margin Methods for Part-of-Speech Tagging (Yasemin Altun).

9.1 Introduction.

9.2 Modeling Sequence Labeling.

9.3 Sequence Boosting.

9.4 Hidden Markov Support Vector Machines.

9.5 Experiments.

9.6 Discussion.

References.

10 A Proposal for a Kernel Based Algorithm for Large Vocabulary Continuous Speech Recognition (Joseph Keshet).

10.1 Introduction.

10.2 Segment Models and Hidden Markov Models.

10.3 Kernel Based Model.

10.4 Large Margin Training.

10.5 Implementation Details.

10.6 Discussion.

Acknowledgements.

References.

IV Applications.

11 Discriminative Keyword Spotting (David Grangier, Joseph Keshet and Samy Bengio).

11.1 Introduction.

11.2 Previous Work.

11.3 Discriminative Keyword Spotting.

11.4 Experiments and Results.

11.5 Conclusions.

Acknowledgements.

References.

12 Kernel-based Text-independent Speaker Verification (Johnny Mariéthoz, Samy Bengio and Yves Grandvalet).

12.1 Introduction.

12.2 Generative Approaches.

12.3 Discriminative Approaches.

12.4 Benchmarking Methodology.

12.5 Kernels for Speaker Verification.

12.6 Parameter Sharing.

12.7 Is the Margin Useful for This Problem?

12.8 Comparing all Methods.

12.9 Conclusion.

References.

13 Spectral Clustering for Speech Separation (Francis R. Bach and Michael I. Jordan).

13.1 Introduction.

13.2 Spectral Clustering and Normalized Cuts.

13.3 Cost Functions for Learning the Similarity Matrix.

13.4 Algorithms for Learning the Similarity Matrix.

13.5 Speech Separation as Spectrogram Segmentation.

13.6 Spectral Clustering for Speech Separation.

13.7 Conclusions.

References .

Index.

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Dr Joseph Keshet, IDIAP, Switzerland

Dr Keshet  received his B.Sc. and M.Sc. in electrical engineering from the Tel-Aviv University, Tel-Aviv, Israel, in 1994 and 2002, respectively. He got his Ph.D. from the Hebrew University of Jerusalem, Israel in 2007. From 1994 to 2002, he was with the Israeli Defense Forces (Intelligence Corps), where he was in charge of advanced research activities in the fields of speech coding. Since 2007, he is a research scientist in speech recognition at IDIAP Research Institute, Martigny, Switzerland.

Dr Samy Bengio, Google, California, US

Dr Bengio received his M.Sc. and Ph.D. degrees in Computer Science from University of Montreal in 1989 and 1993 respectively. Between 1999 and 2006, he was a senior researcher in statistical machine learning at IDIAP Research Institute, where he supervised PhD students and postdoctoral fellows working on many areas of machine learning. He is the author/co-author of more than 160 international publications, including 30 journal papers. He has organized several international workshops (such as the MLMI series) and been in the organization committee of several well known conferences (such as NIPS). Since early 2007, he is a research scientist in machine learning at Google, in Mountain View, California.

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