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首页> 外文期刊>IEEE transactions on circuits and systems . I , Regular papers >CAR-Lite: A Multi-Rate Cochlear Model on FPGA for Spike-Based Sound Encoding
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CAR-Lite: A Multi-Rate Cochlear Model on FPGA for Spike-Based Sound Encoding

机译：CAR-Lite：FPGA上基于穗的声音编码的多速率耳蜗模型

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摘要

Filters in cochlear models use different coefficients to break sound into a 2-D time-frequency representation. On digital hardware with a single sampling rate, the number of bits required to represent these coefficients requires substantial computational resources such as memory storage. In this paper, we present a cochlear model operating at multiple sampling rates. As a result, fewer bits are required to represent filter coefficients on hardware as opposed to all the filters operating at a single sampling rate; with a 108-filter cochlear implementation, up to nine times fewer coefficients are needed. We present an implementation of this model in Matlab and on an Altera Cyclone V field-programmable gate array. We also demonstrate the capability of our model to encode sound at various intensity levels and with real-world signals.
机译：耳蜗模型中的滤波器使用不同的系数将声音分解为二维时频表示。在具有单一采样率的数字硬件上，表示这些系数所需的位数需要大量的计算资源，例如存储器。在本文中，我们提出了以多种采样率运行的耳蜗模型。结果，与以单个采样率工作的所有滤波器相比，需要较少的比特来表示硬件上的滤波器系数。采用108滤波器的人工耳蜗，所需的系数最多减少了9倍。我们在Matlab和Altera Cyclone V现场可编程门阵列上展示了该模型的实现。我们还演示了我们的模型对各种强度级别的声音和真实信号进行编码的能力。

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