Asynchronous Binaural Spatial Audition Sensor With 2$, imes,$64$, imes,$4 Channel Output
Asynchronous Binaural Spatial Audition Sensor With 2$, imes,$64$, imes,$4 Channel Output
复制标题
具有 2$, imes,$64$, imes,$4 通道输出的异步双耳空间试听传感器
DOI：
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发表时间：
2014
影响因子：
5.1
通讯作者：
T. Delbruck
中科院分区：
文献类型：
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作者：
Shih;A. van Schaik;B. Minch;T. Delbruck
本文提出了一个集成的基于事件的双耳硅耳蜗系统，旨在有效的空间听觉和听觉场景分析。耳蜗芯片具有一对匹配的数字校准64级级联模拟二阶滤波器组，具有512个脉冲频率调制（PFM）地址事件表示（AER）输出。通道的品质因数（Qs）由本地DAC单独调整。该2P4M 0.35 μ m CMOS芯片包括集成的麦克风前置放大器和偏置电路的平均功耗为14 mW。典型的语音数据速率为每秒10 k到100 k事件（eps），峰值输出速率为10 Meps。对于250 mVpp输入，事件定时抖动为2 us。它示出的事件驱动的源定位应用的计算成本可以高达40倍，低于传统的互相关方法相比。
This paper proposes an integrated event-based binaural silicon cochlea system aimed at efficient spatial audition and auditory scene analysis. The cochlea chip has a matched pair of digitally-calibrated 64-stage cascaded analog second-order filter banks with 512 pulse-frequency modulated (PFM) address-event representation (AER) outputs. The quality factors (Qs) of channels are individually adjusted by local DACs. The 2P4M 0.35 um CMOS chip consumes an average power of 14 mW including its integrated microphone preamplifiers and biasing circuits. Typical speech data rates are 10 k to 100 k events per second (eps) with peak output rates of 10 Meps. The event timing jitter is 2 us for a 250 mVpp input. It is shown that the computational cost of an event-driven source localization application can be up to 40 times lower when compared to a conventional cross-correlation approach.