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Hits 1.241 – 1.260 of 1.629
1242 |
Efficient Algorithms for Speech Recognition.
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In: DTIC AND NTIS (1996)
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Abstract:
Advances in speech technology and computing power have created a surge of interest in the practical application of speech recognition. However, the most accurate speech recognition systems in the research world are still far too slow and expensive to be used in practical, large vocabulary continuous speech applications. Their main goal has been recognition accuracy, with emphasis on acoustic and language modelling. But practical speech recognition also requires the computation to be carried out in real time within the limited resources CPU power and memory size of commonly available computers. There has been relatively little work in this direction while preserving the accuracy of research systems. In this thesis, we focus on efficient and accurate speech recognition. It is easy to improve recognition speed and reduce memory requirements by trading away accuracy, for example by greater pruning, and using simpler acoustic and language models. It is much harder to improve both the recognition speed and reduce main memory size while preserving the accuracy. This thesis presents several techniques for improving the overall performance of the CMU Sphinx-II system. Sphinx-II employs semi-continuous hidden Markov models for acoustics and trigram language models, and is one of the premier research systems of its kind. The techniques in this thesis are validated on several widely used benchmark test sets using two vocabulary sizes of about 20K and 58K words. The main contributions of this thesis are an 8-fold speedup and 4-fold memory size reduction over the baseline Sphinx-II system. The improvement in speed is obtained from the following techniques: lexical tree search, phonetic fast match heuristic, and global best path search of the word lattice.
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Keyword:
*ALGORITHMS; *SPEECH RECOGNITION; ACCURACY; ACOUSTICS; COMPUTERS; EFFICIENCY; GLOBAL; HEURISTIC METHODS; LANGUAGE; LEXICOGRAPHY; MEMORY DEVICES; MODELS; PATHS; REAL TIME; REQUIREMENTS; RESOURCES; SEARCHING; SIZES(DIMENSIONS); SPEECH; STANDARDS; TEST SETS; THESES; TREES; VELOCITY; VOCABULARY; Voice Communications
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URL: http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA310308 http://www.dtic.mil/docs/citations/ADA310308
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1244 |
Analysis of Defense Language Institute Automated Student Questionnaire Data.
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In: DTIC AND NTIS (1996)
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1245 |
Analysis of Russian and Spanish Subskill Testing at the Defense Language Institute.
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In: DTIC AND NTIS (1996)
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1247 |
Assessing Australian children with the Test for Auditory Comprehension of Language - Revised: is it a useful tool?
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1253 |
Expressiver Wortschatz: Vergleich zweier psychologischer Testverfahren bei Kindergartenkindern ... : Expressive Vocabulary: a Comparison of two Psychological Tests for Kindergarden Children ...
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1254 |
Expressiver Wortschatz: Vergleich zweier psychologischer Testverfahren bei Kindergartenkindern ; Expressive Vocabulary: a Comparison of two Psychological Tests for Kindergarden Children
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In: Praxis der Kinderpsychologie und Kinderpsychiatrie 44 (1995) 2, S. 44-47 (1995)
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1255 |
Overview of Results of the MUC-6 Evaluation
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In: DTIC (1995)
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1256 |
Intelligenz und sprachliche Leistungen bei Sonderschulkindern mit 7 und 9 Jahren ; Intelligence and Language Scores from Children at a Special School for Learning Disabled at the Age of 7 and 9 Years
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In: Praxis der Kinderpsychologie und Kinderpsychiatrie 44 (1995) 6, S. 196-203 (1995)
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1257 |
External/Internal Data Fusion Testbed: History, Components and Experimental Analysis.
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In: DTIC AND NTIS (1995)
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1258 |
Rapport d’enquête sociolinguistique: Première évaluation parmi les Togbo
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