Low-Power Lossless Data Compression for Wireless Brain Electrophysiology
Por:
Cuevas-Lopez, A, Perez-Montoyo, E, Lopez-Madrona, V, Canals, S and Moratal, D
Publicada:
1 may 2022
Resumen:
Wireless electrophysiology opens important possibilities for neuroscience, especially for recording brain activity in more natural contexts, where exploration and interaction are not restricted by the usual tethered devices. The limiting factor is transmission power and, by extension, battery life required for acquiring large amounts of neural electrophysiological data. We present a digital compression algorithm capable of reducing electrophysiological data to less than 65.5% of its original size without distorting the signals, which we tested in vivo in experimental animals. The algorithm is based on a combination of delta compression and Huffman codes with optimizations for neural signals, which allow it to run in small, low-power Field-Programmable Gate Arrays (FPGAs), requiring few hardware resources. With this algorithm, a hardware prototype was created for wireless data transmission using commercially available devices. The power required by the algorithm itself was less than 3 mW, negligible compared to the power saved by reducing the transmission bandwidth requirements. The compression algorithm and its implementation were designed to be device-agnostic. These developments can be used to create a variety of wired and wireless neural electrophysiology acquisition systems with low power and space requirements without the need for complex or expensive specialized hardware.
Filiaciones:
Cuevas-Lopez, A:
Univ Politecn Valencia, Valencia 46022, Spain
Perez-Montoyo, E:
Inst Neurociencias Alicante, Alicante 03550, Spain
Lopez-Madrona, V:
Inst Neurociencias Alicante, Alicante 03550, Spain
:
Inst Neurociencias Alicante, Alicante 03550, Spain
Moratal, D:
Univ Politecn Valencia, Valencia 46022, Spain
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