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John Lazzaro

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5 papers
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5

NeurIPS Conference 1996 Conference Paper

A Micropower Analog VLSI HMM State Decoder for Wordspotting

  • John Lazzaro
  • John Wawrzynek
  • Richard Lippmann

We describe the implementation of a hidden Markov model state decoding system, a component for a wordspotting speech recogni(cid: 173) tion system. The key specification for this state decoder design is microwatt power dissipation; this requirement led to a continuous(cid: 173) time, analog circuit implementation. We characterize the operation of a 10-word (81 state) state decoder test chip.

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NeurIPS Conference 1995 Conference Paper

Silicon Models for Auditory Scene Analysis

  • John Lazzaro
  • John Wawrzynek

We are developing special-purpose, low-power analog-to-digital converters for speech and music applications, that feature analog circuit models of biological audition to process the audio signal before conversion. This paper describes our most recent converter design, and a working system that uses several copies ofthe chip to compute multiple representations of sound from an analog input. This multi-representation system demonstrates the plausibility of inexpensively implementing an auditory scene analysis approach to sound processing.

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NeurIPS Conference 1991 Conference Paper

Temporal Adaptation in a Silicon Auditory Nerve

  • John Lazzaro

Many auditory theorists consider the temporal adaptation of the auditory nerve a key aspect of speech coding in the auditory periph(cid: 173) ery. Experiments with models of auditory localization and pitch perception also suggest temporal adaptation is an important ele(cid: 173) ment of practical auditory processing. I have designed, fabricated, and successfully tested an analog integrated circuit that models many aspects of auditory nerve response, including temporal adap(cid: 173) tation.

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NeurIPS Conference 1990 Conference Paper

A Delay-Line Based Motion Detection Chip

  • Tim Horiuchi
  • John Lazzaro
  • Andrew Moore
  • Christof Koch

Inspired by a visual motion detection model for the ra. bbit retina and by a computational architecture used for early audition in the barn owl, we have designed a chip that employs a correlation model to report the one-dimensional field motion of a scene in real time. Using subthreshold analog VLSI techniques, we have fabricated and successfully tested a 8000 transistor chip using a standard MOSIS process.

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