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Modeling Perception of Spectral Profile Changes
(1993)
In this thesis, we explore how the human auditory system represents and detects changes in a spectral profile. First, using profile analysis methods, we measure listeners' sensitivities to changes in spectral peak shapes ...
Representation of Spectral Profiles in the Auditory System, II: Detection of Spectral Peak Shape Changes
(1994)
Based on the ripple analysis model outlined in Part I of this paper, predictions are made for the detection of shape changes in spectral peak profiles. Peak shape is uniquely described in terms of two parameters: bandwidth ...
Analog VLSI Implementations of Auditory Wavelet Transforms Using Switched-Capacitor Circuits
(1992)
A general scheme for the VLSI implementation of auditory wavelet transforms is proposed using switched-capacitor (SC) circuits. SC circuits are well suited for this application since the dilation constant across different ...
Finite-State Vector Quantization for Noisy Channels
(1992)
Under noiseless channel conditions and for sources with memory, finite-state vector quantizers (FSVQs) exhibit improvements over memoryless vector quantizers. It is shown, however, that in the presence of channel noise, ...
A Study of the Reflection Symmetric Residual Quantizer and Application to Speech Coding
(1993)
The performance of the reflection symmetric residual quantizer (rRQ) on various types of sources is tested and certain conclusions about its capabilities and limitations are drawn. rRQ is then used to design several ...
Representation of Spectral Profiles in the Auditory System Part II: A Ripple Analysis Model
(1993)
Based on experimental results presented in [Vranic-Sowers and Shamma, 1993], and on further physiological and psychoacoustical evidence, it is argued that the auditory system analyzes a spectral profile along two largely ...
Design and Performance Evaluation of a Class of Finite-State Vector Quantizers
(1992)
The finite-state vector quantizer (FSVQ), introduced by Foster, Dunham and Gray, is a finite-state machine that can be viewed as a collection of memoryless full-searched vector quantizers, where each input vector is encoded ...
Temporally Dynamic Neural Networks for Speaker Independent Phoneme Recognition
(1993)
An alternative view of neural network based phoneme recognition based on multiresolution signal processing which incorporates noncausal context is suggested. Also some suggestions are made regarding target and error weight ...
Zero-Crossing and Noise Suppression in Auditory Wavelet Transformations
(1992)
A common sequence of operations in the early stages of most biological sensory systems is a wavelet transform followed by a compressive nonlinearity. In this paper, we explore the contribution of these operations to the ...
Spectral Gradient Columns in Primary Auditory Cortex: Physiological and Psychoacoustical Correlates
(1991)
Mapping of the spatial distribution of responses in the primary auditory cortex (AI) reveal that both the gradient of the acoustic spectrum and sensitivity to FM sweep direction are encoded in an orderly manner along the ...