Energy-aware feedback control for a H.264 video decoder
Energy-aware feedback control for a H.264 video decoder
复制标题
H.264 视频解码器的能量感知反馈控制
DOI：
10.1080/00207721.2013.822607
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发表时间：
2015
影响因子：
4.3
通讯作者：
N. Marchand
中科院分区：
文献类型：
--
作者：
S. Durand;A. Alt;D. Simon;N. Marchand
使用高度集成芯片的嵌入式设备必须处理相互冲突的约束，同时在有限的能量存储下执行计算要求高的应用程序。自动控制和反馈回路似乎是一种有效的解决方案，可以同时适应由于微小规模门的可变性、变化的和不可预测的计算需求以及有限的能量存储限制而产生的性能不确定性。本文给出了一个由多个反馈环路控制的嵌入式视频解码器的实例，以实现解码质量和功耗之间的权衡，充分利用了芯片的频率和电压调节能力。内环采用快速预测控制策略，实现电压和频率的动态调节。外环计算内环处理帧解码所需的调度设置点。反馈环已在普通PC机上实现，并给出了实验结果。
Embedded devices using highly integrated chips must cope with conflicting constraints, while executing computationally demanding applications under limited energy storage. Automatic control and feedback loops appear to be an effective solution to simultaneously accommodate for performance uncertainties due to the tiny scale gates variability, varying and poorly predictable computing demands and limited energy storage constraints. This paper presents the example of an embedded video decoder controlled by several feedback loops to carry out the trade-off between decoding quality and energy consumption, exploiting the frequency and voltage scaling capabilities of the chip. The inner loop controls the dynamic voltage and frequency scaling through a fast predictive control strategy. The outer loop computes the scheduling set-points needed by the inner loop to process frames decoding. The feedback loops have been implemented on a stock PC and experimental results are provided.