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Braille–Latin conversion using memristive bidirectional associative memory neural network

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Abstract

Artificial neural networks (ANNs) are finding increasing use as tools to model and solve problems in almost every discipline in today’s world. The successful implementation of ANNs in software—particularly in the fields of deep learning and machine learning—has spiked an interest in designing hardware architectures that are custom-made to implement ANNs. Several categories of ANNs exist. The two-layer bidirectional associative memory (BAM) is a particular class of hetero-associative memory networks that is extremely efficient and exhibits good performance for storing and retrieving pattern pairs. The memristor is a novel hardware element that is well-suited to modelling neural synapses because it exhibits tunable resistance. In this work, in order to create a device that can perform Braille–Latin conversion, we have implemented a circuit realization of a BAM neural network. The implemented hardware BAM uses a memristor crossbar array for modelling neural synapses and a neuron circuit comprising an I-to-V converter (resistor), voltage comparator, D flip-flop, and inverter. The efficiency of the implemented hardware BAM was tested initially using 2 × 2 and 3 × 3 patterns. Upon successfully verifying the ability of the implemented BAM to store and retrieve simple pattern pairs, it was trained for a pattern-recognition application, namely mapping Braille alphabets to their Latin counterparts and vice versa. The performance of the implemented BAM network is robust even on the introduction of noise. The application can recognize the input patterns with accuracies of 100% in either direction when tested with up to 30% noise.

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The research data is available from the corresponding author upon request.

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Authors and Affiliations

  1. School of Electronics Engineering, Vellore Institute of Technology, Chennai, India

    Jayasri Vaidyaraman, S. Shruthi & V. Ravi

  2. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA

    Abitha K. Thyagarajan

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  1. Jayasri Vaidyaraman
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  2. Abitha K. Thyagarajan
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  3. S. Shruthi
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  4. V. Ravi
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Correspondence to V. Ravi.

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Vaidyaraman, J., Thyagarajan, A.K., Shruthi, S. et al. Braille–Latin conversion using memristive bidirectional associative memory neural network. J Ambient Intell Human Comput 14, 12511–12534 (2023). https://doi.org/10.1007/s12652-022-04386-8

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