Time delay neural network: Difference between revisions

Revision as of 16:33, 16 July 2020

Revision as of 18:47, 16 August 2020

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The TDNN was introduced in the late 1980s and applied to a task of [[phoneme]] classification for automatic [[speech recognition]] in speech signals where the automatic determination of precise segments or feature boundaries was difficult or impossible. Because the TDNN recognizes phonemes and their underlying acoustic/phonetic features, independent of position in time, it improved performance over static classification.<ref name="phoneme detection" /><ref name=":0">Alexander Waibel, ''[http://www.inf.ufrgs.br/~engel/data/media/file/cmp121/waibel89_TDNN.pdf Phoneme Recognition Using Time-Delay Neural Networks]'', SP87-100, Meeting of the Institute of Electrical, Information and Communication Engineers (IEICE), December, 1987,Tokyo, Japan.</ref> It was also applied to two-dimensional signals (time-frequency patterns in speech,<ref name=":1">John B. Hampshire and Alexander Waibel, ''[http://papers.nips.cc/paper/213-connectionist-architectures-for-multi-speaker-phoneme-recognition.pdf Connectionist Architectures for Multi-Speaker Phoneme Recognition]'', Advances in Neural Information Processing Systems, 1990, Morgan Kaufmann.</ref> and coordinate space pattern in OCR<ref name=":2">Stefan Jaeger, Stefan Manke, Juergen Reichert, Alexander Waibel, ''[https://www.researchgate.net/profile/Stefan_Jaeger/publication/220163530_Online_handwriting_recognition_the_NPen_recognizer_Int_J_Doc_Anal_Recognit_3169-180/links/0c96051af3e6133ed0000000.pdf Online handwriting recognition: the NPen++recognizer]'', International Journal on Document Analysis and Recognition Vol. 3, Issue 3, March 2001</ref>).

==== Max pooling ====

In 1990, Yamaguchi et al. introduced the concept of max pooling. They did so by combining TDNNs with max pooling in order to realize a speaker independent isolated word recognition system.<ref name=Yamaguchi111990>{{cite conference |title=A Neural Network for Speaker-Independent Isolated Word Recognition |last1=Yamaguchi |first1=Kouichi |last2=Sakamoto |first2=Kenji |last3=Akabane |first3=Toshio |last4=Fujimoto |first4=Yoshiji |date=November 1990 |___location=Kobe, Japan |conference=First International Conference on Spoken Language Processing (ICSLP 90)|url=https://www.isca-speech.org/archive/icslp_1990/i90_1077.html}}</ref>