Článek ve sborníku konference

POVEY Daniel, HANNEMANN Mirko, BOULIANNE Gilles, BURGET Lukáš, GHOSHAL Arnab, JANDA Miloš, KARAFIÁT Martin, KOMBRINK Stefan, MOTLÍČEK Petr, QIAN Yanmin, RIEDHAMMER Korbinian, VESELÝ Karel a VU Ngoc Thang. Generating Exact Lattices in The WFST Framework. In: Proceedings of 2012 IEEE International Conference on Acoustics, Speech and Signal Processing. Kyoto: IEEE Signal Processing Society, 2012, s. 4213-4216. ISBN 978-1-4673-0044-5.
Jazyk publikace:angličtina
Název publikace:Generating Exact Lattices in The WFST Framework
Název (cs):Generování přesných svazů v rámci WFST
Sborník:Proceedings of 2012 IEEE International Conference on Acoustics, Speech and Signal Processing
Konference:The 37th International Conference on Acoustics, Speech, and Signal Processing
Místo vydání:Kyoto, JP
Vydavatel:IEEE Signal Processing Society
URL:http://www.fit.vutbr.cz/research/groups/speech/publi/2012/povey_icassp2012_0004213.pdf [PDF]
Klíčová slova
Speech Recognition, Lattice Generation
Tento článek pojednává o generování přesných svazů v rámci WFST, tedy při použití dekodérů "fully expanded" - WFST.
We describe a lattice generation method that is exact, i.e. it satisfies all the natural properties we would want from a lattice of alternative transcriptions of an utterance. This method does not introduce substantial overhead above one-best decoding. Our method is most directly applicable when using WFST decoders where the WFST is "fully expanded", i.e. where the arcs correspond to HMM transitions. It outputs lattices that include state-level alignments as well as word labels. The general idea is to create a state-level lattice during decoding, and to do a special form of determinization that retains only the best-scoring path for each word sequence. This special determinization algorithm is a solution to the following problem: Given a WFST A, compute a WFST B that, for each input-symbolsequence of A, contains just the lowest-cost path through A. Our solution always works if the projection of A on its input labels is determinizable, e.g. if A is acyclic.
   author = {Daniel Povey and Mirko Hannemann and Gilles
	Boulianne and Luk{\'{a}}{\v{s}} Burget and Arnab
	Ghoshal and Milo{\v{s}} Janda and Martin
	Karafi{\'{a}}t and Stefan Kombrink and Petr
	Motl{\'{i}}{\v{c}}ek and Yanmin Qian and Korbinian
	Riedhammer and Karel Vesel{\'{y}} and Thang Ngoc
   title = {Generating Exact Lattices in The WFST Framework},
   pages = {4213--4216},
   booktitle = {Proceedings of 2012 IEEE International Conference on
	Acoustics, Speech and Signal Processing},
   year = 2012,
   location = {Kyoto, JP},
   publisher = {IEEE Signal Processing Society},
   ISBN = {978-1-4673-0044-5},
   doi = {10.1109/ICASSP.2012.6288848},
   language = {english},
   url = {http://www.fit.vutbr.cz/research/view_pub.php.cs?id=9914}

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