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A Reconfigurable CNN-Based accelerator Design for Fast and Energy-Efficient Object Detection System on Mobile fpga

IEEE ACCESS 2023年 11卷 59438-59445页

作者： Kim, Victoria Heekyung Choi, Kyuwon Ken IIT Dept Elect & Comp Engn Chicago IL 60616 USA

In limited-resource edge computing circumstances such as on mobile devices, IoT devices, and electric vehicles, the energy-efficient optimized convolutional neural network (CNN) accelerator implemented on mobile Field Programmable Gate Array (fpga) is becoming more attractive due to its high accuracy and scalability. In recent days, mobile fpgas such as the Xilinx PYNQ-Z1/Z2 and Ultra96, definitely have the advantage of scalability and flexibility for the implementation of deep learning algorithm-based object detection applications. It is also suitable for battery-powered systems, especially for drones and electric vehicles, to achieve energy efficiency in terms of power consumption and size aspect. However, it has the low and limited performance to achieve real-time processing. In this article, optimizing the accelerator design flow in the register-transfer level (RTL) will be introduced to achieve fast programming speed by applying low-power techniques on fpga accelerator implementation. In general, most accelerator optimization techniques are conducted on the system level on the fpga. In this article, we propose the reconfigurable accelerator design for a CNN-based object detection system on the register-transfer level on mobile fpga. Furthermore, we present RTL optimization design techniques that will be applied such as various types of clock gating techniques to eliminate residual signals and to deactivate the unnecessarily active block. Based on the analysis of the CNN-based object detection architecture, we analyze and classify the common computing operation components from the Convolutional Neuron Network, such as multipliers and adders. We implement a multiplier/adder unit to a universal computing unit and modularize it to be suitable for a hierarchical structure of RTL code. The proposed system design was tested with Resnet-20 which has 23 layers and it was trained with the dataset, CIFAR-10 which provides a test set of 10,000 images in several formats, an

关键词： index terms fpga accelerator CNN accelerator RT level design techniques low power techniques reconfigurable accelerator CNN-based object detection low power consumption high performance mobile fpga

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