RESEARCH
COMPUTER VISION
Value-aware Quantization for Training and Inference of Neural Networks
September 10, 2018
Abstract
We propose a novel value-aware quantization which applies aggressively reduced precision to the majority of data while separately handling a small amount of large data in high precision, which reduces total quantization errors under very low precision. We present new techniques to apply the proposed quantization to training and inference. The experiments show that our method with 3-bit activations (with 2% of large ones) can give the same training accuracy as full-precision one while offering significant (41.6% and 53.7%) reductions in the memory cost of activations in ResNet-152 and Inception-v3 compared with the state-of-the-art method. Our experiments also show that deep networks such as Inception-v3, ResNet-101 and DenseNet-121 can be quantized for inference with 4-bit weights and activations (with 1% 16-bit data) within 1% top-1 accuracy drop.
AUTHORS
Written by
Sungjoo Yoo
Peter Vajda
Eunhyeok Park
Sungjoo Yoo
Publisher
ECCV
Research Topics
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