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Hits 1 – 20 of 55
1
Cochlear implant filterbank design and optimization : a simulation study
Cosentino, Stefano
;
Falk, Tiago H
;
McAlpine, David
. - : Institute of Electrical and Electronics Engineers, 2014
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2
Towards objective measures of speech intelligibility for Cochlear Implant users in reverberant environments
Cosentino, Stefano
;
Marquardt, Torsten
;
McAlpine, David
. - : Piscataway, NJ : IEEE, 2012
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3
Objective Measurement of the Speech Transmission Quality of Vocoders by Means of the Speech Transmission Index
van Gils, Bastiaan J.
;
van Wijngaarden, Sander J.
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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4
Speech Analysis and Synthesis Based on Pitch-Synchronous Segmentation of the Speech Waveform.
Kang, George S.
;
Fransen, Lawrence J.
In: DTIC AND NTIS (1994)
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5
The Intelligibility of Natural and LPC-Vocoded Words and Sentences Presented to Native and Non-Native Speakers of English
Mack, M.
;
Tierney, J.
;
Boyle, M. E.
In: DTIC AND NTIS (1990)
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6
Vocabulary Synthesis Based on Line Spectrum Pairs
Everett, Stephanie S.
In: DTIC AND NTIS (1989)
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7
The Intelligibility of Natural and Vocoded Semantically Anomalous Sentences: A Comparative Analysis of English Monolinguals and German-English Bilinguals.
Mack, Molly
;
Tierney, Joseph
In: DTIC AND NTIS (1987)
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8
Hopfield Model Applied to Vowel and Consonant Discrimination
Gold, Bernard
In: DTIC AND NTIS (1986)
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9
The Intelligibility of Non-Vocoded and Vocoded Semantically Anomalous Sentences.
Mack,M A
;
Gold,B
In: DTIC AND NTIS (1985)
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10
A Comparative Analysis of Whispered and Normally Phonated Speech Using an LPC-10 Vocoder
Wilson,Johnny B
;
Mosko,James D
In: DTIC AND NTIS (1985)
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11
Intelligibility Performance of the LPC-10 and APC/SQ Speech Algorithms in a Fading Environment.
Trebaol,George O
;
Heckman,Randy L
In: DTIC AND NTIS (1985)
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12
Automatic Speaker Recognition over Military Communication Systems. A Feasibility Evaluation.
Everett,S S
In: DTIC AND NTIS (1985)
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13
Subjective and Objective Evaluation of Pitch Extractors for LPC and Harmonic Deviations Vocoders.
Viswanathan,V R
;
Russell,W H
In: DTIC AND NTIS (1984)
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14
A Recursive Linear Predictive Vocoder.
Janssen,W A
In: DTIC AND NTIS (1983)
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15
Vector/Matrix Quantization for Narrow-Bandwidth Digital Speech Compression.
Wong,David Y
In: DTIC AND NTIS (1982)
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16
Research on Narrowband Communications.
Roucos,Salim
;
Schwartz,Richard
;
Makhoul,John
In: DTIC AND NTIS (1982)
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17
Research on Narrowband Communications
Makhoul, John
;
Roukos, Salim
;
Schwartz, Richard
In: DTIC AND NTIS (1981)
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18
Research on Narrowband Communications
Makhoul, John
;
Roukos, Salim
;
Schwartz, Richard
In: DTIC AND NTIS (1981)
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19
Research on Narrowband Communications
Makhoul, John
;
Krasner, Michael
;
Roukos, Salim
...
In: DTIC AND NTIS (1981)
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20
Research on Narrowband Communications
Makhoul, John
;
Roukos, Salim
;
Krasner, Micheal
...
In: DTIC AND NTIS (1981)
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