A Reinforcement-Learning-Based Energy-Efficient Framework for Multi-Task Video Analytics Pipeline

• URL: http://arxiv.org/abs/2104.04443v1
• Date: Fri, 9 Apr 2021 15:44:06 GMT
• Title: A Reinforcement-Learning-Based Energy-Efficient Framework for Multi-Task Video Analytics Pipeline
• Authors: Yingying Zhao, Mingzhi Dong, Yujiang Wang, Da Feng, Qin Lv, Robert Dick, Dongsheng Li, Tun Lu, Ning Gu, Li Shang
• Abstract summary: Video analytics pipelines are energy-intensive due to high data rates and reliance on complex inference algorithms. We propose an adaptive-resolution optimization framework to minimize the energy use of multi-task video analytics pipelines. Our framework has significantly surpassed all baseline methods of similar accuracy on the YouTube-VIS dataset.
• Score: 16.72264118199915
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep-learning-based video processing has yielded transformative results in recent years. However, the video analytics pipeline is energy-intensive due to high data rates and reliance on complex inference algorithms, which limits its adoption in energy-constrained applications. Motivated by the observation of high and variable spatial redundancy and temporal dynamics in video data streams, we design and evaluate an adaptive-resolution optimization framework to minimize the energy use of multi-task video analytics pipelines. Instead of heuristically tuning the input data resolution of individual tasks, our framework utilizes deep reinforcement learning to dynamically govern the input resolution and computation of the entire video analytics pipeline. By monitoring the impact of varying resolution on the quality of high-dimensional video analytics features, hence the accuracy of video analytics results, the proposed end-to-end optimization framework learns the best non-myopic policy for dynamically controlling the resolution of input video streams to achieve globally optimize energy efficiency. Governed by reinforcement learning, optical flow is incorporated into the framework to minimize unnecessary spatio-temporal redundancy that leads to re-computation, while preserving accuracy. The proposed framework is applied to video instance segmentation which is one of the most challenging machine vision tasks, and the energy consumption efficiency of the proposed framework has significantly surpassed all baseline methods of similar accuracy on the YouTube-VIS dataset.

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