计算机工程与科学2024，Vol.46Issue(8)：1331-1339,9.DOI:10.3969/j.issn.1007-130X.2024.08.001
基于SRAM缓存和存内计算的低功耗关键词唤醒系统
A low-power keyword spotting system with SRAM buffer and computing-in-memory
摘要
Abstract
This paper proposes a low-power keyword spotting(KWS)system to overcome the prob-lem of high-power consumption caused by deploying KWS algorithms on edge computing hardware,which can significantly impact the endurance of mobile devices.The proposed KWS system is based on computing-in-memory(CIM)technology and software-hardware co-design.In terms of algorithm,a ternary quantized MFCC-CNN joint algorithm based on the standard MFCC algorithm topology is pro-posed.All the general matrix multiplication(GEMM)in MFCC is mapped to the neural network accel-erator.At the circuit level,the proposed system uses a computing-in-memory(CIM)core based on SRAM to overcome the power and memory walls in traditional von Neumann architecture accelerators.Additionally,a SRAM buffer circuit based on a look-up table is proposed to replace the register delay chain,which multiplexes the memory array in the CIM core.Both the SRAM-based CIM core and buffer are implemented using custom circuit units.At the system level,a low-power KWS system is proposed utilizing the two customized circuits discussed above.The system is implemented using ASIC and cus-tomized circuit design methods and synthesized using a 28 nm process library.The proposed system achieves a processing delay of 64 ms on 10 classification tasks,with a total power consumption of 645.28μW.The dynamic power consumption of the MFCC pipeline accounts for 5.9％of the total dynamic power consumption,and the total power consumption accounts for only 1.3％of the system's power consumption.关键词
唤醒/三值量化神经网络/存内计算/串行快速傅里叶变换/软硬件协同设计Key words
spotting/ternary quantized neural network/computing-in-memory/serial fast Fourier transform(FFT)/software-hardware co-design分类
信息技术与安全科学引用本文复制引用
黄至锐,贾心茹,朱浩哲,陈迟晓..基于SRAM缓存和存内计算的低功耗关键词唤醒系统[J].计算机工程与科学,2024,46(8):1331-1339,9.基金项目
国家重点研发计划(2022YFB4500101) （2022YFB4500101）
