Exploring Information-Theoretic Criteria to Accelerate the Tuning of Neuromorphic Level-Crossing ADCs

Ali Safa, Jonah Van Assche, Charlotte Frenkel, Andre Bourdoux, Francky Catthoor, Georges Gielen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
16 Downloads (Pure)

Abstract

Level-crossing analog-To-digital converters (LC-ADCs) are neuromorphic, event-driven data converters that are gaining much attention for resource-constrained applications where intelligent sensing must be provided at the extreme edge, with tight energy and area budgets. LC-ADCs translate real-world analog signals (such as ECG, EEG, etc.) into sparse spiking signals, providing significant data bandwidth reduction and inducing savings of up to two orders of magnitude in area and energy consumption at the system level compared to the use of conventional ADCs. In addition, the spiking nature of LC-ADCs make their use a natural choice for ultra-low-power, event-driven spiking neural networks (SNNs). Still, the compressed nature of LC-ADC spiking signals can jeopardize the performance of downstream tasks such as signal classification accuracy, which is highly sensitive to the LC-ADC tuning parameters. In this paper, we explore the use of popular information criteria found in model selection theory for the tuning of the LC-ADC parameters. We experimentally demonstrate that information metrics such as the Bayesian, Akaike and corrected Akaike criteria can be used to tune the LC-ADC parameters in order to maximize downstream SNN classification accuracy. We conduct our experiments using both full-resolution weights and 4-bit quantized SNNs, on two different bio-signal classification tasks. We believe that our findings can accelerate the tuning of LC-ADC parameters without resorting to computationally-expensive grid searches that require many SNN training passes.

Original languageEnglish
Title of host publicationProceedings of the 2023 Annual Neuro-Inspired Computational Elements Conference, NICE 2023
PublisherAssociation for Computing Machinery (ACM)
Pages63-70
Number of pages8
ISBN (Electronic)978-1-4503-9947-0
DOIs
Publication statusPublished - 2023
Event2023 Annual Neuro-Inspired Computational Elements Conference, NICE 2023 - San Antonio, United States
Duration: 11 Apr 202314 Apr 2023

Publication series

NameACM International Conference Proceeding Series

Conference

Conference2023 Annual Neuro-Inspired Computational Elements Conference, NICE 2023
Country/TerritoryUnited States
CitySan Antonio
Period11/04/2314/04/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • event-based sampling
  • Information criteria
  • LC-ADC
  • Spiking Neural Networks

Fingerprint

Dive into the research topics of 'Exploring Information-Theoretic Criteria to Accelerate the Tuning of Neuromorphic Level-Crossing ADCs'. Together they form a unique fingerprint.

Cite this