Page 28

Contents | 28 of 127

Download PDF | | Reference URL | Gallery View | Parent Record

Publication Type	Technical report
School or College	College of Engineering
Department	Computing, School of
Creator	Burton, Robert Preece
Title	Real-time measurement of multiple three-dimensional positions
Date	1973-06
Description	Abstract: This paper describes a priori digital speech analysis. This method takes advantage of the quasi-periodic nature of voice speech sounds to reduce the amount of computation needed to obtain the analysis parameters. The vocal tract is modeled as an all-pole digital filter (predictive coding) and pitch is detected using a modified autocorrelation method. Since voiced speech is quasi-periodic, its waveform is characterized by a high degree of redundancy from pitch period to pitch period. For these regions, the parameters which describe the mathematical voice model are relatively constant. Specifically, the predictor coefficients and the pitch period vary slowly enough in these regions to allow their preceding values to be used as additional a priori information when calculating their present values. Estimates of the predictor coefficients are obtained using a priori least squares. By incorporating previous parameter values as a priori information, less deata (a smaller window size) are required to estimate the current parameters. Also, in addition to the savings obtained from reduced arithmetic operations, it is shown that a priori least squares generates a smoother set of predictor coefficients than those generated when a priori methods are ingnord. Estimates of the pitch period are obtained using a priori pitch detection. It is shown that pitch can be estimated more efficiently (fewer real multiplies) when the previous pitch period, the predictor coefficients, and the interperiod waveform correlation are incorporated in the estimation.
Type	Text
Publisher	University of Utah
Subject	light-emitting diodes; photomultiplier
Subject LCSH	Real-time data processing; Three-dimensional imaging; Computer graphics--Research
Language	eng
Series	University of Utah Computer Science Technical Report
Relation is Part of	ARPANET
Format Medium	application/pdf
Format Extent	145,220,947 bytes
File Name	Burton-Real_Time_Measurment_2.pdf
Conversion Specifications	Original scanned with Kirtas 2400 and saved as 400 ppi uncompressed TIFF. PDF generated by LIMB™ for CONTENTdm display
ARK	ark:/87278/s6bz8s8d
Setname	ir_computersa
ID	106371
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6bz8s8d

Page Metadata

Title	Page 28
Setname	ir_computersa
ID	106271
OCR Text	Show convey instructions from the user to the computer. [1] The Instrumentation Research Laboratory is a venture of the Utah Engineering Experiment Station Electrical Engineering Department at the University 0 [2] The Advanced Research Projects Agency of the Dep of Defense, monitored by the Rome Air Development Griffiss Air Force Base, New York, 13440, under c F30602-70-C-0030 [3] Robert P. Burton, Real-Time Measurement of Ml Three-Dimensional Positions: Hardware Technical 1 University of Utah Computer Science Technical TMAN-73-01 (June 1973) [5] Henri Gouraud, Computer Displa􁪽􋵯 of University of Utah Computer SC1ence UTEC-CSc-71-113 (June 1971) [4] Frederic I. Parke, Computer Generated Animat: Faces, University of Utah Computer Science Technical UTEC=CSc-72-120 (June 1972), p. 29-35. Curved SUl Technical [6] Parke, Computer Generated Animation of Faces [7] A. Michael Noll, "Man-Machine Tactile Cornmun Ld (unpublished Ph.D. dissertation, Dept. of Elec Engineering, Polytechnic Institute of Brooklyn, 1971) 13-14. [8] Donald L. Vickers, "Sorcerer I s Apprentice: Head-,r. Display and Wand" (unpublished Ph.D. dissertation, of Electrical Engineering, University of Utah, 1973) J91 W. Todd Wipke and Albert Whetstone, "Graphic Digi a n 3-D," SIGGRAPH Report, Vol. 5, No. 4 (Winter 1971 [10] Lawrence G. Roberts, The Lincoln Wand, M.l.T. I Laboratory Report (Lexington, Mass., June 1966) [11] Michael J. Archuleta, Hidden Surface Line r Algorithm, University of Utah Computer Science Tee Report UTEC-CSc-72-l2l (June 1972) [1􁪽􋴱1 Stanley Plagenhoef, Patterns Cllffs, of Human Motion (Eng N.J.: Prentice-Hall, Inc., 1971}. 􁪽􋴮.
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6bz8s8d/106271