David Anderson - Academia.edu (original) (raw)

Papers by David Anderson

Research paper thumbnail of Speech enhancement using non-acoustic sensors

Interspeech 2005, 2005

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Research paper thumbnail of Noise robust digit recognition using a glottal radar sensor for voicing detection

Interspeech 2004, 2004

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Research paper thumbnail of A soft decision MMSE amplitude estimator as a noise preprocessor to speech coder s using a glottal sensor

Interspeech 2004, 2004

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Research paper thumbnail of Teaching Hardware Design Of Fixed Point Digital Signal Processing Systems

2007 Annual Conference & Exposition Proceedings

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Research paper thumbnail of DURIP: Integrated Sensing and Computation for Passive Covert Radar, Signals Intelligence, and Other Applications Driven by Moore's Law

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Research paper thumbnail of Adaptive filters using modified sliding-block distributed arithmetic with offset binary coding

2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009

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Research paper thumbnail of VLSI implementation of an effective lattice reduction algorithm with fixed-point considerations

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Lattice reduction-aided equalization techniques have emerged as a low-complexity method to achiev... more Lattice reduction-aided equalization techniques have emerged as a low-complexity method to achieve the same diversity as maximum likelihood detectors. We address the VLSI implementation of these LR-aided equalizers by modifying the CLLL algorithm from a fixed-point hardware perspective. We then apply the modified algorithm together with additional micro-architecture and operation scheduling enhancements to create an updated CLLL processor. Finally, through BER simulations and FPGA synthesis results we demonstrate the suitability of our CLLL processor for integration into a 64-QAM MIMO system.

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Research paper thumbnail of A floating-gate vector-quantizer

The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002.

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Research paper thumbnail of Mixed-mode Implementation of Particle Filters

2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 2007

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Research paper thumbnail of Synthesis of MITE Log-Domain Filters with Unique Operating Points

2005 IEEE International Symposium on Circuits and Systems

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Research paper thumbnail of Low-power audio classification for ubiquitous sensor networks

In the past researchers have proposed a variety of features that are based on the human auditory ... more In the past researchers have proposed a variety of features that are based on the human auditory system. However none of these features have been able to replace mel-frequency cepstral coefficients (MFCC) as the preferred feature for audio classification problems, either because of computational costs involved or because of their poor performance in the presence of noise. In this paper we present new features derived from a model of the early auditory system. We compare the performance of the new features with MFCC in a four-class audio classification problem and show that they perform better. We also test the noise robustness of the new features in a two-way audio classification problem and show that it outperforms the MFCC. Further, these new features can be implemented in low-power analog VLSI circuitry making them ideal for low-power sensor networks.

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Research paper thumbnail of Error Immune Logic for Low-Power Probabilistic Computing

VLSI Design, 2010

Two novel theorems are developed which prove that certain logic functions are more robust to erro... more Two novel theorems are developed which prove that certain logic functions are more robust to errors than others. These theorems are used to construct datapath circuits that give an increased immunity to error over other naive implementations. A link between probabilistic operation and ultra-low energy computing has been shown in prior work. These novel theorems and designs will be used to further improve probabilistic design of ultra-low power datapaths. This culminates in an asynchronous design for the maximum amount of energy savings per a given error rate. Spice simulation results using a commercially available and well-tested 0.25 μm technology are given verifying the ultra-low power, probabilistic full-adder designs. Further, close to 6X energy savings is achieved for a probabilistic full-adder over the deterministic case.

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Research paper thumbnail of Compressive Sensing on a CMOS Separable-Transform Image Sensor

Proceedings of the IEEE, 2010

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Research paper thumbnail of Lattice Reduction for MIMO Detection: From Theoretical Analysis to Hardware Realization

IEEE Transactions on Circuits and Systems I: Regular Papers, 2011

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Research paper thumbnail of Large-scale field-programmable analog arrays for analog signal processing

IEEE Transactions on Circuits and Systems I: Regular Papers, 2005

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Research paper thumbnail of Programmable and adaptive analog filters using arrays of floating-gate circuits

Proceedings 2001 Conference on Advanced Research in VLSI. ARVLSI 2001

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Research paper thumbnail of A framework for estimation of clean speech by fusion of outputs from multiple speech enhancement systems

Interspeech 2005, 2005

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Research paper thumbnail of Adaptive likelihood codebook reordering vector quantization for 1-D data sources

2015 IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE), 2015

This paper outlines an adaptive extension of likelihood codebook reordering (LCR) vector quantiza... more This paper outlines an adaptive extension of likelihood codebook reordering (LCR) vector quantization. By providing a method for allowing the vector quantization to adapt in a predetermined way, the codebook may be adaptively reordered to allow more efficient encoding by giving preference to encountered vectors in the dictionary. In particular, adaptation allows the trained dictionaries to be more efficient in representing specific data. The difference in the training and testing sets produces different transition matrices which are used to encode testing vectors. The adaptive likelihood codebook reordering vector quantization adapts the a priori transition matrix obtained from training data set to the testing data set on an online instantaneous basis. This method yields improvements in coding rate when entropy coding is applied to the reordered indices obtained from the adaptive version of the LCR algorithm.

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Research paper thumbnail of Audio classification and scene recognition and for hearing aids

ABSTRACT

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Research paper thumbnail of Internet course delivery-making it easier and more effective

2000 IEEE International Conference on Multimedia and Expo. ICME2000. Proceedings. Latest Advances in the Fast Changing World of Multimedia (Cat. No.00TH8532)

Since 1997, Georgia Tech has been delivering courses across the Atlantic to its sister campus in ... more Since 1997, Georgia Tech has been delivering courses across the Atlantic to its sister campus in France using streaming media. Our experience has shown that there are two significant obstacles that must be overcome before faculty and students are ready to embrace this technology, and accept this delivery mechanism for distance learning courses. First, in order for faculty to become

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Research paper thumbnail of Speech enhancement using non-acoustic sensors

Interspeech 2005, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Noise robust digit recognition using a glottal radar sensor for voicing detection

Interspeech 2004, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A soft decision MMSE amplitude estimator as a noise preprocessor to speech coder s using a glottal sensor

Interspeech 2004, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Teaching Hardware Design Of Fixed Point Digital Signal Processing Systems

2007 Annual Conference & Exposition Proceedings

Bookmarks Related papers MentionsView impact

Research paper thumbnail of DURIP: Integrated Sensing and Computation for Passive Covert Radar, Signals Intelligence, and Other Applications Driven by Moore's Law

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Adaptive filters using modified sliding-block distributed arithmetic with offset binary coding

2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of VLSI implementation of an effective lattice reduction algorithm with fixed-point considerations

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Lattice reduction-aided equalization techniques have emerged as a low-complexity method to achiev... more Lattice reduction-aided equalization techniques have emerged as a low-complexity method to achieve the same diversity as maximum likelihood detectors. We address the VLSI implementation of these LR-aided equalizers by modifying the CLLL algorithm from a fixed-point hardware perspective. We then apply the modified algorithm together with additional micro-architecture and operation scheduling enhancements to create an updated CLLL processor. Finally, through BER simulations and FPGA synthesis results we demonstrate the suitability of our CLLL processor for integration into a 64-QAM MIMO system.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A floating-gate vector-quantizer

The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Mixed-mode Implementation of Particle Filters

2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Synthesis of MITE Log-Domain Filters with Unique Operating Points

2005 IEEE International Symposium on Circuits and Systems

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Low-power audio classification for ubiquitous sensor networks

In the past researchers have proposed a variety of features that are based on the human auditory ... more In the past researchers have proposed a variety of features that are based on the human auditory system. However none of these features have been able to replace mel-frequency cepstral coefficients (MFCC) as the preferred feature for audio classification problems, either because of computational costs involved or because of their poor performance in the presence of noise. In this paper we present new features derived from a model of the early auditory system. We compare the performance of the new features with MFCC in a four-class audio classification problem and show that they perform better. We also test the noise robustness of the new features in a two-way audio classification problem and show that it outperforms the MFCC. Further, these new features can be implemented in low-power analog VLSI circuitry making them ideal for low-power sensor networks.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Error Immune Logic for Low-Power Probabilistic Computing

VLSI Design, 2010

Two novel theorems are developed which prove that certain logic functions are more robust to erro... more Two novel theorems are developed which prove that certain logic functions are more robust to errors than others. These theorems are used to construct datapath circuits that give an increased immunity to error over other naive implementations. A link between probabilistic operation and ultra-low energy computing has been shown in prior work. These novel theorems and designs will be used to further improve probabilistic design of ultra-low power datapaths. This culminates in an asynchronous design for the maximum amount of energy savings per a given error rate. Spice simulation results using a commercially available and well-tested 0.25 μm technology are given verifying the ultra-low power, probabilistic full-adder designs. Further, close to 6X energy savings is achieved for a probabilistic full-adder over the deterministic case.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Compressive Sensing on a CMOS Separable-Transform Image Sensor

Proceedings of the IEEE, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Lattice Reduction for MIMO Detection: From Theoretical Analysis to Hardware Realization

IEEE Transactions on Circuits and Systems I: Regular Papers, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Large-scale field-programmable analog arrays for analog signal processing

IEEE Transactions on Circuits and Systems I: Regular Papers, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Programmable and adaptive analog filters using arrays of floating-gate circuits

Proceedings 2001 Conference on Advanced Research in VLSI. ARVLSI 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A framework for estimation of clean speech by fusion of outputs from multiple speech enhancement systems

Interspeech 2005, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Adaptive likelihood codebook reordering vector quantization for 1-D data sources

2015 IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE), 2015

This paper outlines an adaptive extension of likelihood codebook reordering (LCR) vector quantiza... more This paper outlines an adaptive extension of likelihood codebook reordering (LCR) vector quantization. By providing a method for allowing the vector quantization to adapt in a predetermined way, the codebook may be adaptively reordered to allow more efficient encoding by giving preference to encountered vectors in the dictionary. In particular, adaptation allows the trained dictionaries to be more efficient in representing specific data. The difference in the training and testing sets produces different transition matrices which are used to encode testing vectors. The adaptive likelihood codebook reordering vector quantization adapts the a priori transition matrix obtained from training data set to the testing data set on an online instantaneous basis. This method yields improvements in coding rate when entropy coding is applied to the reordered indices obtained from the adaptive version of the LCR algorithm.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Audio classification and scene recognition and for hearing aids

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Internet course delivery-making it easier and more effective

2000 IEEE International Conference on Multimedia and Expo. ICME2000. Proceedings. Latest Advances in the Fast Changing World of Multimedia (Cat. No.00TH8532)

Since 1997, Georgia Tech has been delivering courses across the Atlantic to its sister campus in ... more Since 1997, Georgia Tech has been delivering courses across the Atlantic to its sister campus in France using streaming media. Our experience has shown that there are two significant obstacles that must be overcome before faculty and students are ready to embrace this technology, and accept this delivery mechanism for distance learning courses. First, in order for faculty to become

Bookmarks Related papers MentionsView impact