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Fully-Parallel Area-Efficient Deep Neural Network Design Using Stochastic Computing
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DOI：10.1109/TCSII.2017.2746749.png)
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Deep neural network (DNN) has emerged as a powerful machine learning technique for various artificial intelligence applications. Due to the unique advantages on speed, area, and power, specific hardware design has become a very attractive solution for the efficient deployment of DNN. However, the huge resource cost of multipliers makes the fully-parallel implementations of multiplication-intensive DNN still very prohibitive in many real-time resource-constrained embedded applications. This brief proposes a fully-parallel area-efficient stochastic DNN design. By leveraging stochastic computing (SC) technique, the computations of DNN are implemented using very simple stochastic logic, thereby enabling low-complexity fully-parallel DNN design. In addition, to avoid the accuracy loss incurred by the approximation of SC, we propose an accuracy-aware DNN datapath architecture to retain the test accuracy of stochastic DNN. Moreover, we propose a novel low-complexity architecture for the binary-to-stochastic (B-to-S) interface to drastically reduce the footprint of the peripheral B-to-S circuit. Experimental results show that the proposed stochastic DNN design achieves much better hardware performance than non-stochastic design with negligible test accuracy loss.
Keyword:
Deep neural network
stochastic computing
fully-parallel
area-efficient
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