Ronald W. Schafer

Ronald W. Schafer's AcademicInfluence.com Rankings

Ronald W. Schafer

Engineering

#1484

World Rank

#2178

Historical Rank

#552

USA Rank

Electrical Engineering

#321

World Rank

#363

Historical Rank

#122

USA Rank

Applied Physics

#609

World Rank

#629

Historical Rank

#111

USA Rank

engineering Degrees

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Engineering

Ronald W. Schafer's Degrees

PhD Electrical Engineering Stanford University
Masters Electrical Engineering Stanford University

Why Is Ronald W. Schafer Influential?

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According to Wikipedia, Ronald W. Schafer is an American electrical engineer notable for his contributions to digital signal processing. After receiving his Ph.D. degree at Massachusetts Institute of Technology in 1968, he joined the Acoustics Research Department at Bell Laboratories, where he did research on digital signal processing and digital speech coding. In 1974 he joined the Georgia Institute of Technology, where he became a professor in electrical engineering, until leaving to join Hewlett-Packard in March 2005.

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Ronald W. Schafer's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Discrete-time signal processing (2nd ed.) (1999) (1807)
Digital Processing of Speech Signals (1978) (1679)
What Is a Savitzky-Golay Filter? [Lecture Notes] (2011) (762)
Nonlinear filtering of multiplied and convolved signals (1968) (728)
Morphological filters-Part I: Their set-theoretic analysis and relations to linear shift-invariant filters (1987) (720)
Digital Signal Processing (1978) (653)
What Is a Savitzky-Golay Filter ? (608)
The chirp z-transform algorithm (1969) (588)
Morphological filters-Part II: Their relations to median, order-statistic, and stack filters (1987) (569)
Constrained iterative restoration algorithms (1981) (466)
Morphological skeleton representation and coding of binary images (1984) (448)
Introduction to Digital Speech Processing (2007) (394)
From frequency to quefrency: a history of the cepstrum (2004) (347)
The chirp z-transform algorithm and its application (1969) (337)
A regularized iterative image restoration algorithm (1991) (336)
Morphological systems for multidimensional signal processing (1990) (333)
Theory and Applications of Digital Speech Processing (2010) (292)
System for automatic formant analysis of voiced speech. (1970) (286)
On the use of the I 0 -sinh window for spectrum analysis (1980) (251)
A Survey of Methods for Volumetric Scene Reconstruction from Photographs (2001) (235)
Homomorphic analysis of speech (1968) (234)
Decision-based median filter using local signal statistics (1994) (171)
Theoretical aspects of morphological filters by reconstruction (1995) (169)
Real-time digital hardware pitch detector (1976) (164)
Signal Processing First (2003) (160)
Digital representations of speech signals (1975) (160)
Lossless compression of digital audio (2001) (156)
Methods for Volumetric Reconstruction of Visual Scenes (2004) (141)
Two-dimensional linear prediction and its application to adaptive predictive coding of images (1984) (137)
Multilevel thresholding using edge matching (1988) (132)
Design and simulation of a speech analysis-synthesis system based on short-time Fourier analysis (1973) (113)
The flat zone approach: A general low-level region merging segmentation method (1997) (103)
On the behavior of minimax fir digital Hilbert transformers (1974) (102)
Echo removal by discrete generalized linear filtering. (1969) (98)
Synthetic voices for computers (1970) (96)
A method of color filter array interpolation with alias cancellation properties (2001) (92)
Recursive and nonrecursive realizations of digital filters designed by frequency sampling techniques (1971) (83)
Computer-Based Exercises for Signal Processing Using MATLAB Ver.5 (1994) (76)
Template matching based on a grayscale hit-or-miss transform (1996) (73)
On the behavior of minimax relative error fir digital differentiators (1974) (72)
On the frequency-domain properties of Savitzky-Golay filters (2011) (69)
A comparison of rotation-based methods for iterative reconstruction algorithms (1995) (65)
Demosaicking: Color Filter Array Interpolation in Single-Chip Digital Cameras (2003) (63)
Using multimedia to teach the theory of digital multimedia signals (1996) (57)
A general formulation of constrained iterative restoration algorithms (1985) (56)
Teminology in digital signal processing (1972) (51)
Image-based photo hulls (2002) (50)
Nonexpansive pyramid for image coding using a nonlinear filterbank (1998) (48)
Nonstationary iterative image restoration (1985) (42)
Frequency Estimation from Waveforms Using Multi-Layered Neural Networks (2016) (41)
Theory of wavelet transform over finite fields (1999) (36)
Experiences in teaching DSP first in the ECE curriculum (1997) (32)
Design of digital filter banks for speech analysis (1971) (32)
A non-expansive pyramidal morphological image coder (1994) (31)
Theory and Application of Digital Speech Processing by (29)
Computer synthesis of speech by concatenation of formant-coded words (1971) (29)
Two-dimensional digital signal processing (1976) (29)
Digital techniques for computer voice response: Implementations and applications (1976) (27)
Mathematical morphology and its applications to image and signal processing [Book Review] (1996) (26)
Two-band wavelets and filterbanks over finite fields with connections to error control coding (2003) (26)
Scientific bases of human-machine communication by voice. (1994) (25)
Subband-domain filtering of MPEG audio signals (1999) (25)
Locality and Adjacency Stability Constraints for Morphological Connected Operators (2004) (25)
Improved Voxel Coloring Via Volumetric Optimization (2001) (25)
A blind algorithm for reverberation-time estimation using subband decomposition of speech signals. (2012) (25)
Fir digital filter banks for speech analysis (1975) (25)
Multi-resolution space carving using level set methods (2002) (25)
A Lower Bound for Structuring Element Decompositions (1991) (23)
The Flat Zone Approach and Color Images (1994) (22)
A multiline computer voice response system utilizing ADPCM coded speech (1974) (22)
A generalized interpolative VQ method for jointly optimal quantization and interpolation of images (1998) (22)
Image-based photo hulls for fast and photo-realistic new view synthesis (2003) (21)
On the quality assessment of sound signals (2008) (21)
An iterative method for restoring noisy blurred images (1984) (20)
Perfect reconstructing nonlinear filter banks (1996) (20)
Comparative study of iterative deconvolution algorithms (1978) (20)
Block error correcting codes using finite-field wavelet transforms (2006) (19)
DSP for practicing engineers: a case study in Internet course delivery (2004) (19)
A surface evolution approach of probabilistic space carving (2002) (19)
Effects of smoothing and quantizing the parameters of formant-coded voiced speech. (1971) (19)
Post-sampling aliasing control for natural images (1995) (19)
Iterative deconvolution using several different distorted versions of an unknown signal (1983) (19)
Double Circulant Self-Dual Codes Using Finite-Field Wavelet Transforms (1999) (18)
A Hardware Realization of a Digital Formant Speech Synthesizer (1971) (17)
A survey of digital speech processing techniques (1972) (17)
A fast method of generating digital random numbers (1970) (17)
IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING SOCIETY (1979) (16)
Correction to "Recursive and non-recursive realization of digital filters designed by frequency sampling techniques" (1972) (15)
Reverberation Assessment in Audioband Speech Signals for Telepresence Systems (2016) (15)
Multi-media and World Wide Web resources for teaching DSP (1996) (15)
Theory and applications of digital speech processing :International Version (2011) (15)
Constrained iterative deconvolution using a conjugate gradient algorithm (1982) (14)
A system approach to residual echo suppression in robust hands-free teleconferencing (2011) (14)
DSP first (1997) (14)
Design and Simulation of Digital Filter Banks for Speech Analysis (1972) (12)
Convolutional codes using finite-field wavelets: time-varying codes and more (2005) (12)
Novel volumetric scene reconstruction methods for new view synthesis (2002) (12)
The motion transform: a new motion compensation technique (1996) (11)
A 4.8 k bps homomorphic vocoder using analysis-by-synthesis excitation analysis (1989) (11)
Robust block-matching motion-estimation technique for noisy sources (1997) (11)
Teaching digital signal processing with Stanford's Lab-in-a-Box (2015) (11)
Speech Quality Measurement (1977) (11)
Critical Morphological Sampling and Its Applications to Image Coding (1994) (11)
Digital signal processing first (1999) (11)
A system approach to acoustic echo cancellation in robust hands-free teleconferencing (2011) (10)
Psychoacoustically-based processing of MPEG-I layer 1-2 encoded signals (1997) (10)
Decoding of half-rate wavelet codes; Golay code and more (2001) (10)
Homotopy and critical morphological sampling (1994) (10)
On the quality-assessment of reverberated speech (2012) (10)
Optimal Ray Intersection For Computing 3 D Points From N-View Correspondences (2001) (9)
AudioPaK-an integer arithmetic lossless audio codec (1998) (9)
Realization of paraunitary filter banks over fields of characteristic two (2000) (9)
Two-dimensional linear predictive analysis of arbitrarily-shaped regions (1983) (9)
EW-PESQ: A Quality Assessment Method for Speech Signals Sampled at 48 kHz (2010) (9)
Motion vector estimation using spatiotemporal prediction and its application to video coding (1996) (8)
Maximum Likelihood Time Delay Estimation with Phase Domain Analysis in the Generalized Cross Correlation Framework (2008) (8)
MAXIMUM-LIKELIHOOD SOUND SOURCE LOCALIZATION WITH A MULTIVARIATE COMPLEX LAPLACIAN DISTRIBUTION (8)
Repackaging signals, systems and circuits in the core ECE curriculum (1999) (8)
Wiring telephone apparatus from computer-generated speech (1972) (8)
Homomorphic Systems and Cepstrum Analysis of Speech (2008) (8)
An experimental study of the effects of noise on a class of iterative deconvolution algorithms (1979) (8)
4D segmentation of cardiac data using active surfaces with spatiotemporal shape priors (2007) (8)
Comparison of rotation-based methods for iterative reconstruction algorithms (1995) (8)
Maximum entropy deconvolution (1986) (7)
DSP for practicing engineers: an online course for continuing DSP education (2001) (7)
Excitation modeling in a homomorphic vocoder (1990) (7)
Detecting the Presence of Speech Using ADPCM Coding (1976) (7)
Feature analysis for quality assessment of reverberated speech (2009) (7)
A High-Quality, Energy Optimized, Real-Time Sampling Rate Conversion Library for the StrongARM Microprocessor (2002) (7)
Theory of paraunitary filter banks over fields of characteristic two (2002) (6)
Crystal radios or DSP first? (1998) (6)
Edge-based adaptive smoothing (1997) (6)
Optimization of digital audio for internet transmission (1998) (6)
Quality Evaluation of Reverberation in Audioband Speech Signals (2008) (6)
An algorithm for locating the beginning and end of an utterance using adpcm coded speech (1974) (6)
Matlab exercises in support of teaching digital speech processing (2014) (6)
Motion transforms for video coding (1996) (6)
Enhancement of text images using a context based nonlinear interpolative vector quantization method (1998) (5)
Image partition using an iterative multi-resolution smoothing algorithm (1992) (5)
Time-domain measurement of loudspeaker driver parameters (1979) (5)
Discriminability Measure for Microphone Array Source Localization (2012) (5)
Time domain measurement of loudspeaker driver parameters (1979) (5)
Time-domain measurement of vented-box loudspeaker system parameters (1981) (5)
An MPEG Audio Layered Transcoder (1998) (5)
Digital signal processing for doppler radar signals (1979) (4)
Using multimedia and the Web to teach the theory of digital multimedia signals (1995) (4)
DSP first-a first course in ECE (1996) (4)
Implementation of linear digital filters based on morphological representation theory (1994) (4)
Some experiments in ADPCM coding of images (1982) (4)
An Investigation of the Effects of Smoothing and Quantization of the Parameters of Formant‐Coded Speech (1971) (4)
Environment for the automatic manipulation and analysis of morphological expressions (1990) (4)
A Parametric Objective Quality Assessment Tool for Speech Signals Degraded by Acoustic Echo (2012) (4)
Low complexity matching criteria for image/video applications (1994) (4)
An objective method for quality assessment of ultra-wideband speech corrupted by echo (2009) (4)
An Automatic Algorithm for Locating the Beginning and End of an Utterance Using ADPCM Coded Speech (1974) (4)
Image segmentation using intraregion averaging techniques (1998) (3)
Improving the performance of LPC-CVSD tandem connections by phase modification (1977) (3)
Signal processing technique for measurement of vented-box loudspeaker system parameters (1982) (3)
Online Dsp Education: Dsp For Practicing Engineers (2001) (3)
Application of adaptive noise cancelling in a noisy reverberant environment (1983) (3)
Quality assessment of audio: Increasing applicability scope of objective methods via prior identification of impairment types (2009) (3)
Acoustic tube analysis of formant bandwidths and frequencies in helium speech (1984) (3)
Application Of Mathematical Morphology To FLIR Images (1987) (3)
A generalized interpolative vector quantization method for jointly optimal quantization, interpolation, and binarization of text images (2000) (3)
Tandem Interconnections of LPC and CVSD Digital Speech Coders. (1977) (3)
The symbolic representation, analysis, and manipulation of morphological algorithms (1992) (3)
Mathematical Considerations in Digital Simulations of the Vocal Tract (1973) (2)
On the bandlimited extrapolation of discrete signals (1983) (2)
Digital Signal Processing and Theory and Application of Digital Signal Processing (1976) (2)
Programs for supporting the teaching of digital speech processing (2013) (2)
A real time speech subband coder using the TMS32010 (1987) (2)
Phase-Domain Statistical Analysis for Audio Source Localization (2007) (2)
Lossless audio coding with MPEG-4 structured audio (2002) (2)
Efficient image partition algorithm based on edge information (1992) (2)
XII. STATISTICAL COMMUNICATION THEORY (1965) (2)
The symbolic manipulation and analysis of morphological algorithms (1992) (2)
@ IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING GROUP (1974) (2)
@ IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING GROUP (1974) (2)
Correlogram template matching for time-delay estimation (2011) (2)
Digital Hardware Realization of a Random‐Number Generator (1972) (2)
Performance evaluation of analysis-by-synthesis homomorphic vocoders (1992) (2)
Single Channel Speech Enhancement Using Outlier Detection (2016) (2)
Multichannel linear predictive coding of color images (1984) (2)
Real-Time Digital Hardware (1975) (1)
DSP First (2nd Edition) (2007) (1)
Evaluation of LPC/CVSD tandem connections (1978) (1)
Speech Synthesis System Integrating Formant‐Coded Words and Computer‐Generated Stress Parameters (1974) (1)
Efficient motion-estimation algorithms for video coding (1996) (1)
Symbolic manipulation and analysis of morphological expressions (1990) (1)
Measurement of Edge Coincidence in Image Thresholdings (1993) (1)
Terminology in Digital Signal (2002) (1)
Bounds on filters by reconstruction (1996) (1)
Simulation and Analysis of Audio Signal Processor (2011) (1)
Objectives: The broad objective is to provide students with a background in discrete time signal processing computation, design and implementation of digital algorithms. (2016) (0)
Use of a Computer Voice‐Response System for Wiring Communications Equipment (1973) (0)
Template matching based on rank-order operations (1994) (0)
Representation and processing of signals in two-dimensional form (1983) (0)
Multidimensional Digital Signal Processing Optical Devices for Information Processing and Electromagnetic Analysis and Measurement (1996) (0)
Engineering research equipment grant : : video digitizing and display system (1987) (0)
Recursive and Nonreeur- sive Realizations of Dig- ital Filters Desi Frequency Sampling Techniques (1971) (0)
Isolated word, speaker dependent recognition under the presence noise, based on an audio retrieval algorithm (2004) (0)
Time doman measurement of moving coil loudspeaker driver parameters (1982) (0)
VECTOR EXCITATION HOMOMORPHIC VOCODER (1991) (0)
Patent Number : 5 , 548 , 661 45 Date of Patent : Aug . 20 , 1996 OPERATOR INDEPENDENT MAGE CYTOMETER Inventors : (2017) (0)
Synthesis of Speech from Unrestricted Text (1986) (0)
Jointly optimal interpolation and halftoning of text images using a deterministic annealing vector quantization method (1999) (0)
Improved Voxel Coloring Via Volumetric (2000) (0)
Wideband and narrowband tandem optimization (1977) (0)
Corrections to "Digital representations of speech signals" (1976) (0)
Book Review : Mathematical Morphology and Its Applications to Image and Signal Processing Proceedings of the Third International Symposium on Mathmatical Morphology, Atlanta, Georgia, May 1996 (1997) (0)
Digital hardware for pitch detection (1974) (0)
Data communications: Automatic voice response: Interfacing man with machine: This developing technique can relieve the human from repetitive instructional chores by piecing together his recorded words (1974) (0)
Two-Dimensional Signal Processing, Optical Information Storage and Processing, and Electromagnetic Measurements (1994) (0)
Digital signal processing for in situ acoustical noise measurements (1982) (0)
A linear filtering solution for color filter array interpolation (2002) (0)
Education in (and by) digital image systems at Georgia Tech (1996) (0)
Automatic Estimation of Formant Frequencies for Voiced Speech (1970) (0)
Yabu-uti, on a Hybrid Predictive-interpolative S C Heme for Reducing Processing 3. Jpeg-based Coding (0)
An Algorithm for Computing theNth Roots of Unity in Bit-Reversed Order R. G. KEYS (1980) (0)
Layered hi-fidelity audio coder for distributed heterogenous environments (1997) (0)
" Human-Machine Communication by Voice , " organized (2005) (0)
Digital hardware for PCM to ADPCM conversion (1974) (0)
PE Course: Signal Processing (2008) (0)
ita1 Hardware ation of Random Number Generator (1972) (0)
Monitoring Scenario for Non-Intrusive Quality Assessment of Teleconference Systems (2011) (0)
Two-dimensional signal processing and storage and theory and applications of electromagnetic measurements. Annual report, 1 January-31 February 1986 (1984) (0)
ita 1 Hardware ation of Random Number Generator (2002) (0)
Report from the 1980 IEEE International symposium on circuits and systems (1980) (0)
Statistical Approaches to Face Recognition a Qualifying Examination Report (1996) (0)

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Ronald W. Schafer's Academic­Influence.com Rankings

Ronald W. Schafer's Degrees

Why Is Ronald W. Schafer Influential?

Ronald W. Schafer's Published Works

Published Works

Other Resources About Ronald W. Schafer

What Schools Are Affiliated With Ronald W. Schafer?

Ronald W. Schafer's AcademicInfluence.com Rankings