Energy and accuracy in multi-stage stochastic computing
Energy and accuracy in multi-stage stochastic computing
复制标题
多级随机计算中的能量和精度
DOI：
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复制
发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Verhelst
中科院分区：
文献类型：
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作者：
Bert Moons;M. Verhelst
集成电路技术中特征尺寸的不断缩小导致电路行为的不确定性和不可靠性增加。因此，维持确定性布尔计算的范式变得越来越具有挑战性。随机计算（SC）以表示概率的伪随机比特流的形式处理数字数据，因此不易受到不确定性的影响。当存在瞬态电路变化时，SC 的性能大大优于传统的二进制实现。以前的工作主要是只有几个级的 SC 电路。本文评估了多级 SC 的可行性。首先讨论这些类型的电路中精度降低的原因。其次，我们介绍了一种评估通用 SC 系统准确性的简单方法。第三，通过 1D-DCT 随机电路（作为 JPEG 压缩加速器的一部分）的设计说明了这种新方法的有效性。最后，我们将分析结果与低级能源考虑因素结合起来。
The continued scaling of feature sizes in integrated circuit technology leads to more uncertainty and unreliability in circuit behaviour. Maintaining the paradigm of deterministic Boolean computing therefore becomes increasingly challenging. Stochastic computing (SC) processes digital data in the form of pseudo-random bit-streams denoting probabilities and is therefore less vulnerable to uncertainty. When transient circuit variations are present, SC greatly outperforms classical binary implementations. Previous work has mainly been on SC circuits with only a few stages. This paper assesses the feasibility of multistage SC. First the reasons for decreasing accuracy in these types of circuits are discussed. Second, we introduce a straightforward method to evaluate the accuracy of general SC systems. Third, the validity of this new approach is illustrated through the design of a 1D-DCT stochastic circuit, as part of a JPEG compression accelerator. Last, we couple the results of our analysis to low-level energy considerations.
影响因子：
4.4
作者：
Gomez-Uribe, Carlos A.;Verghese, George C.
通讯作者：
Verghese, George C.