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Smart Ternary Quantization

2019-09-26 15:49:08
Grégoire Morin, Ryan Razani, Vahid Partovi Nia, Eyyüb Sari

Abstract

Neural network models are resource hungry. Low bit quantization such as binary and ternary quantization is a common approach to alleviate this resource requirements. Ternary quantization provides a more flexible model and often beats binary quantization in terms of accuracy, but doubles memory and increases computation cost. Mixed quantization depth models, on another hand, allows a trade-off between accuracy and memory footprint. In such models, quantization depth is often chosen manually (which is a tiring task), or is tuned using a separate optimization routine (which requires training a quantized network multiple times). Here, we propose Smart Ternary Quantization (STQ) in which we modify the quantization depth directly through an adaptive regularization function, so that we train a model only once. This method jumps between binary and ternary quantization while training. We show its application on image classification.

Abstract (translated)

URL

https://arxiv.org/abs/1909.12205

PDF

https://arxiv.org/pdf/1909.12205.pdf


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