| Considerations in Implementing a MAP (Manufacturing Automation Protocol) Network. |
SEP 1986 |
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| Authors:
D. A. Dytewski
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 | Manufacturing Automation Protocol (MAP) represents an effort to create a common communication mechanism that will become the defacto standard for LAN's (Local Area Networks) in the factory environment. Broadband coaxial cable was chosen as the medium for the MAP network. This paper describes the characteristics of a broadband MAP network and its implementation. Implementation includes planning, installing, and maintaining the network. This paper also suggests that a network coordinator be ... |
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| Automatic Detection and Enhancement of Speech Signals. |
MAR 1975 |
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| Authors:
Mark Weiss; Ernest Aschkenasy; NICOLET SCIENTIFIC CORP NORTHVALE NJ
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| The objective of the work described in this report was to make it less tiring to monitor speech at low signal-to-noise ratios over long periods of time. Two approaches to reducing auditory fatigue were studied: (1) automatic detection of speech and (2) automatic enhancement of the S/N of speech. The first approach was aimed at reducing the amount of time spent in simply listening for speech to occur. After examining ... |
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| Using a Learning System to Recognize Spoken Words, |
25 FEB 1970 |
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| Authors:
Vera Chalupova; Vaclav Chalupa; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| The article shows a method of coding a spoken word, which serves as the input data of a learning system. It is shown that the learning system, composed of a single-stage network of adaptive threshold circuits, is capable of recognizing encoded words after being trained. |
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| STATISTICAL TREATMENT OF PRIMARY CHARACTERISTICS OF SPEECH SIGNALS WITH THE USE OF AN ELECTRONIC COMPUTER, |
01 MAR 1968 |
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| Authors:
O. A. Petrov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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| The article reports on the qualitative estimate of a newly proposed set of primary speech signal characteristics by the statistical processing on an electronic computer of 15 letter sounds dictated by 40 persons. The study covers: (1) the estimate of the feasibility of a simple establishment of invariant functionals characterizing a group of sounds or separate sounds; (2) the estimate of the feasibility of primary functionals description by averaging the ... |
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| CHARACTERISTICS THAT DETERMINE SPEAKER RECOGNITION. |
DEC 1966 |
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| Authors:
Frank R. Clarke; Richard W. Becker; James C. Nixon; STANFORD RESEARCH INST MENLO PARK CALIF
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| Development and evaluation of three types of speaker-discrimination tests are discussed, including effects of various types of signal degradation upon human speaker-recognition performance and comparisons of various techniques for differentiating among speakers. Properties of three tests--a Four-Alternative Forced-Choice Test, an ABX Test, and a Same-Different Test--are described. Using these tests, it was found that effects of signal degradation upon speaker discrimination performance are small in comparison with effects of the ... |
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| SPEECH BANDWIDTH REDUCTION. |
SEP 1966 |
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| Authors:
David M. Jurenko; Richard Abt; John P. Schultz; PHILCO BLUE BELL PA ADVANCED COMMUNICATIONS LAB
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| This report presents experimental results, comclusions, and recommendations resulting from research - conducted on a speech bandwidth reduction technique based on an electrical analog of the human hearing mechanism. This research centered around the Single Equivalent Formant (SEF) technique whereby it is hypothesized that intelligent speech could be transmitted with three parameters: SEF frequency, amplitude, and pitch. This was partially proven in that the intelligence (RT word score) was measured ... |
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| SIGNIFICANCE OF PITCH FOR SPEAKER IDENTIFICATION. |
AUG 1966 |
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| Authors:
Bruno Beek; Richard Vonusa; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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| A number of methods for the extraction of pitch from speech signals were examined and compared. These methods were evaluated in order to determine the most reliable pitch extraction devices for use as a clue or parameter to be used in Speaker Identification. Four Learning and Recognition experiments were performed to determine the significance of pitch as a clue. The experiments are fully discussed and their results are presented in ... |
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| AUTOMATIC VOICE IDENTIFICATION EXPERIMENTS. |
JUL 1966 |
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| Authors:
William B. Floyd; LITTON SYSTEMS INC WALTHAM MA
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| A class of automatic voice identification techniques has been investigated to determine the performance attainable with these techniques as a function of spoken types of speech clues utilized, equipment complexity and type of voice identification being performed. Results of a large series of experiments utilizing a real-time experimental speech processing system to implement those techniques indicate that high quality automatic voice identification decisions can be rendered on fairly low quality ... |
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| PHYSICAL AND PERCEPTUAL IDENTIFICATIONS OF CZECH VOWELS. |
12 APR 1966 |
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| Authors:
Blanka Borovickova; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| This report examines the physical and perceptual identification of Czech vowels. A new complex method of speech analysis is introduced. It consists of evaluating the physical speech parameters in combination with the perceptual parameters, i.e., those obtained from the results of listening tests. The physical parameters are determined with the aid of three-dimensional spectrograms of the visible-speech type. The perceptual parameters are the results of test-listening to acoustical speech signals ... |
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| COMMUNICATION WITHOUT CONVENTIONAL (ELECTRO-MECHANICAL) ACOUSTIC TRANSDUCERS. |
JUN 1965 |
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| Authors:
Robert L. Lucas; Walter J. Bell; E. James Kreul; SANTA RITA TECHNOLOGY INC MENLO PARK CA
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| A tactile transducer provided stimulation composed of pulses of one millisecond duration programmed in regular and irregular sequences. The elicited sensations resembling vowels, fricatives, stops, ect., were readily learned because of their ease of association with already learned speech data. Subjective tests of this tactile communication indicated steep rates of learning and good retentivity. When appropriate phoneme-like sensations and silences were transmitted at about three frames/sec., the illusion of words ... |
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| TECHNIQUE FOR EVALUATION OF SPEECH SYSTEMS. |
APR 1965 |
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| Authors:
Frank R. Clarke; James C. Nixon; STEPHEN E. STUNTZ; STANFORD RESEARCH INST MENLO PARK CA
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| This report covers the progress made and the conclusions reached during the first six months of effort on the development of an automated speech intelligibility test. The literature in intelligibility testing has been surveyed and evaluated. Six of the most common intelligibility tests have been compared in terms of their materials, employment of speakers and listeners, validity and reliability of results, and potential for automation. On the basis of theoretical ... |
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Reports by Keyword(s)
(SPEECH RECOGNITION
