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Hits 21 – 40 of 59

21	Evaluation of Communication During Active Sonar Transmissions with a Speech-Recognition Model
	Marshall, Lynne; Hanna, Thomas E.; Pavlovic, Chaslav V.
	In: DTIC AND NTIS (1993)
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22	Word and Subword Modelling in a Segment-Based HMM Word Spotter Using a Data Analytic Approach
	Marcus, Jeffrey N.
	In: DTIC AND NTIS (1992)
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23	The Use of Distinctive Features for Automatic Speech Recognition
	Meng, Helen M.
	In: DTIC AND NTIS (1991)
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24	Signal Representation, Attribute Extraction and, the Use of Distinctive Features for Phonetic Classification
	Meng, Helen M.; Zue, Victor W.; Leung, Hong C.
	In: DTIC (1991)
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25	Unlimited Vocabulary Synthesis Using Line Spectrum Pairs
	Everett, Stephanie S.
	In: DTIC AND NTIS (1991)
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26	Rule Based Sinusoidal Encoding of Speech
	Alenquer, Luis M.
	In: DTIC AND NTIS (1990)
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27	Acoustic Characteristics of Sentences Produced in Noise
	Bond, Z. S.; Moore, Thomas J.; McCreight, Kate
	In: DTIC AND NTIS (1989)
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28	Vocabulary Synthesis Based on Line Spectrum Pairs
	Everett, Stephanie S.
	In: DTIC AND NTIS (1989)
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29	Phoneme Adjustment in Enhanced Speech
	Bashir, Nadeem A.
	In: DTIC AND NTIS (1989)
	Abstract: A system was developed to enhance the quality and intelligibility of speech which had been pre-processed by a Speech Enhancement Unit (SEU) at RADC Griffis AFB. The system processes the speech in the frequency domain. A Hamming window with 50% overlap was applied to the time waveform and a 512-point Discrete Fourier Transform (DFT) was computed. The amplitude spectrum of voiced regions was smoothed in order to reduce the effects of noise. Frequencies above 2.5 KHz were enhanced as they had been attenuated by SEU. Harmonics of the glottal pitch frequency of voiced speech and peaks of unvoiced speech were selected to further reduce the noise effects. The harmonics of the glottal frequency. The two neighboring frequency points were checked and the maximum of those three points was selected instead of the exact glottal harmonic. Speech was reconstructed using amplitude phase, and frequency of the harmonics/peaks selected. The reconstructed speech had much better quality and improved SNR. SPIRE (Speech and phonetics Interactive Research Environment) and ILS (interactive Laboratory System) software packages were used for visual analysis of the amplitude spectrum. The system was implemented in FORTRAN 77 on a VAX 11/ 780 machine. Keywords: Speech processing, Theses.
	Keyword: PHONEMES; SPEECH; AMPLITUDE; COMPUTER PROGRAMS; ENVIRONMENTS; FORTRAN; FREQUENCY; HARMONICS; ILS COMPUTER PROGRAM; ILS(INTERACTIVE LABORATORY SYSTEM); INTELLIGIBILITY; INTERACTIONS; LABORATORIES; NOISE; NOISE REDUCTION; OPTICAL IMAGES; OPTIMIZATION; PHONETICS; PROCESSING; SPECTRA; SPIRE COMPUTER PROGRAM; SPIRE(SPEECH AND PHONETICS IN INTERACTIVE RESEARCH ENVIRONMENT); THESES; TIME; VAX 11/780 COMPUTERS; Voice Communications; WAVEFORMS
	URL: http://www.dtic.mil/docs/citations/ADA206357 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA206357
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30	Operational Intelligence and the U.S. Army: Much ado About Nothing or Misunderstood Excellence? A Prescription for the 1990's and Beyond
	Frketic, John D.
	In: DTIC AND NTIS (1989)
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31	Modeling and Classification of Acoustic Transients by Speech Recognition Techniques
	Woodard, Jeffrey P.
	In: DTIC AND NTIS (1989)
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32	Speaker Adaptation Using Multiple Reference Speakers
	Kubala, Francis; Schwartz, Richard; Barry, Chris
	In: DTIC (1989)
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33	An Overview of Technology for Spoken Interaction with Machines (Une Introduction a la Communication Vocale avec les Machines).
	Hunt, M J
	In: DTIC AND NTIS (1988)
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34	Time-Frequency Representations for Speech Signals.
	Riley, Michael D
	In: DTIC AND NTIS (1987)
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35	Auditory-Acoustic Basis of Consonant Perception.
	Miller, James D
	In: DTIC AND NTIS (1987)
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36	Voice Degradation in Using Speech Recognisers for Transcribing Inventory Data.
	Kirby,H R; Roach,P J
	In: DTIC AND NTIS (1987)
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37	A Software Life Cycle Support Environment
	Bajwa, L. Y.; LaMonica, Frank S.
	In: DTIC AND NTIS (1987)
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38	Intelligence/Electronic Warfare (IEW) Direction Finding and Fix Estimation Analysis Report. Volume 3. Guardrail
	Gardner, Robert; Gillis, James; Griesel, Ann...
	In: DTIC AND NTIS (1986)
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39	Multi-User Real-Time Speech Processing Facility.
	Pisoni,David B
	In: DTIC AND NTIS (1985)
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40	Application of Some New Artificial Neural System Processing Principles to Pattern Classification.
	Hecht-Nielsen,Robert; Smith,Carolyn
	In: DTIC AND NTIS (1985)
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