Abstract
Binary neural networks (BNNs) are particularly well-suited for low-power embedded devices with limited computational capabilities. Due to the binary weight parameters, it significantly reduces memory footprint and arithmetic logic unit operations. Nevertheless, one of the disadvantages of BNN is low accuracy and sharp optimization space. Several studies of BNNs have recently shown improved accuracy in various tests via more operations and more complicated topologies. This approach, however, is incompatible with the embedded BNN application since it requires complicated data type translation. Hence, We propose a novel approach for the BNN application on the embedded system with multi-scale neural network topology in this research from two optimization perspectives: hardware structure and BNN topology, which preserves more low-level information during the feed-forward process with few operations. Our network topology achieves 91.3% accuracy for the CIFAR-10 dataset, one of the highest recorded by BNN and can process 537 tiny pictures per second when deployed on an All programmable System on Chip (APSoc) device with 4.4W power consumption.