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van Wijngaarden, Sander J. (3)
HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS) (1)
TNO HUMAN FACTORS SOESTERBERG (NETHERLANDS) THERMAL PHYSIOLOGY GROUP (1)
van Gils, Bastiaan J. (1)
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Hits 1 – 3 of 3
1
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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2
Intelligibility of native and non-native Dutch speech
van Wijngaarden, Sander J.
In:
Speech communication. - Amsterdam [u.a.] : Elsevier
35 (2001) 1, 103-114
OLC Linguistik
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3
Speech Intelligibility of Native and Non-Native Speech
van Wijngaarden, Sander J.
In: DTIC (2000)
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