TY - BOOK AU - Vasquez,Daniel AU - Gruhn,Rainer AU - Minker,Wolfgang ED - SpringerLink (Online service) TI - Hierarchical Neural Network Structures for Phoneme Recognition T2 - Signals and Communication Technology, SN - 9783642344251 AV - TK5102.9 U1 - 621.382 23 PY - 2013/// CY - Berlin, Heidelberg PB - Springer Berlin Heidelberg, Imprint: Springer KW - Engineering KW - User interfaces (Computer systems) KW - Computational linguistics KW - Computational intelligence KW - Signal, Image and Speech Processing KW - User Interfaces and Human Computer Interaction KW - Computational Intelligence KW - Language Translation and Linguistics N1 - Background in Speech Recognition -- Phoneme Recognition Task -- Hierarchical Approach and Downsampling Schemes -- Extending the Hierarchical Scheme: Inter and Intra Phonetic Information -- Theoretical framework for phoneme recognition analysis N2 - In this book, hierarchical structures based on neural networks are investigated for automatic speech recognition. These structures are evaluated on the phoneme recognition task where a  Hybrid Hidden Markov Model/Artificial Neural Network paradigm is used. The baseline hierarchical scheme consists of two levels each which is based on a Multilayered Perceptron. Additionally, the output of the first level serves as a second level input. The computational speed of the phoneme recognizer can be substantially increased by removing redundant information still contained at the first level output. Several techniques based on temporal and phonetic criteria have been investigated to remove this redundant information. The computational time could be reduced by 57% whilst keeping the system accuracy comparable to the baseline hierarchical approach UR - http://dx.doi.org/10.1007/978-3-642-34425-1 ER -