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1
Enhancing Mental Readiness in Military Personnel
In: DTIC (2006)
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2
Towards a Formal Ontology for Military Coalitions Operations
In: DTIC (2005)
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3
Comment ameliorer la selection et le traitement des messages verbaux? (How to Improve the Selection and Processing of Verbal Messages)
In: DTIC (2005)
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4
Evaluation of Speech Synthesis Systems using the Speech Reception Threshold Methodology
In: DTIC (2005)
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5
Speech Intelligibility with a Bone Vibrator
In: DTIC (2005)
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6
Objective Measurement of the Speech Transmission Quality of Vocoders by Means of the Speech Transmission Index
In: DTIC (2005)
Abstract: Nearly all types of military speech communication involve the use of so-called (narrow band) voice coders or vocoders. Usually the Speech Transmission Index (STI) uses artificial test signals, which can not be reproduced by vocoders with the usual fidelity. Therefore the STI is not able to evaluate vocoders at this time. Although it is theoretically feasible to measure the Speech Transmission Index with natural speech instead of the usual artificial test signals, each of the various speech-based STI measurement methods proposed in the literature has its own shortcomings and inaccuracies. A new procedure is proposed for estimating a speech based modulation transfer function (MTF), on which the STI is based, that approaches the accuracy of conventional STI implementations based on artificial signals. The new method enables evaluation of vocoders by means of the STI. Applying the method to a voice coder database shows promising results, giving an average squared correlation coefficient R2 of 0.87 between the subjective CVC scores and the calculated STI for male speech. ; See also ADM001856, New Directions for Improving Audio Effectiveness (Nouvelles orientations pour l'amelioration des techniques audio)., The original document contains color images. Published in RTO-MP-HFM-123.
Keyword: *CODERS; *NARROWBAND; *SPEECH TRANSMISSION; *VOCODERS; ACCURACY; Anatomy and Physiology; COMPONENT REPORTS; Cybernetics; DATA BASES; FOREIGN REPORTS; INDEXES; MALES; MEASUREMENT; METHODOLOGY; MTF(MODULATION TRANSFER FUNCTION); NATO FURNISHED; NETHERLANDS; QUALITY; REPRODUCTION; SIGNALS; SPEECH; STI(SPEECH TRANSMISSION INDEX); SYMPOSIA; TEST AND EVALUATION; VOICE COMMUNICATIONS
URL: http://www.dtic.mil/docs/citations/ADA454435
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA454435
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7
Analysis of Free-Form Battlefield Reports with Shallow Parsing Techniques
In: DTIC AND NTIS (2004)
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8
The Case for Using Semantic Nets as a Convergence Format for Symbolic Information Fusion
In: DTIC AND NTIS (2004)
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9
Electronic Information Management and Intellectual Property Rights
In: DTIC AND NTIS (2004)
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10
Ontological Approach to Military Knowledge Modeling and Management
In: DTIC AND NTIS (2004)
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11
Some Psycho-Physiological and Cognitive Implications of Hypobaric Exposure during Selection of Slovak Astronaut Candidates
In: DTIC AND NTIS (2001)
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12
Towards Multilingual Interoperability in Automatic Speech Recognition
In: DTIC (2000)
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13
Clustering of Context Dependent Speech Units for Multilingual Speech Recognition
In: DTIC (2000)
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14
Speech Intelligibility of Native and Non-Native Speech
In: DTIC (2000)
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15
Auditory Features Underlying Cross-Language Human Capabilities in Stop Consonant Discrimination
In: DTIC (2000)
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16
Vowel System Modeling: A Complement to Phonetic Modeling in Language Identification
In: DTIC (2000)
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17
Comparing Three Methods to Create Multilingual Phone Models for Vocabulary Independent Speech Recognition Tasks
In: DTIC (2000)
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18
Speech Recognition of Non-Native Speech Using Native and Non-Native Acoustic Models
In: DTIC (2000)
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19
Multilingual Vocabularies in Automatic Speech Recognition
In: DTIC (2000)
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20
Speech Recognition by Goats, Wolves, Sheep and Non-Natives
In: DTIC (2000)
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