tinyML Research Symposium 2021: Quantization-Guided Training for Compact TinyML Models
tinyML Research Symposium 2021 https://www.tinyml.org/event/research-symposium-2021
Quantization-Guided Training for Compact TinyML Models
Sedigh GHAMARI, AI Research Scientist, Latent AI Inc.
We address the methodology to train and quantize deep neural networks (DNNs) in order to produce compact models while maintaining algorithmic accuracy. In this paper, we propose a Quantization Guided Training (QGT) method to guide DNN training towards optimized low-bit-precision targets, and reach extreme compression levels below 8-bit precision. Unlike standard quantization-aware training (QAT) approaches, QGT uses customized regularization to encourage weight values towards a distribution that maximizes accuracy while reducing quantization errors. We validate QGT using state-of-the-art model architectures (MobileNet, ResNet) on vision datasets. We also demonstrate the effectiveness with an 81KB tiny model for person detection down to 2-bit precision (representing 17.7x size reduction), while maintaining an accuracy drop of only 3% compared to a floating-point baseline.
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