| 便携式心电仪中数据存储机制的实现 |
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| 引用本文： | 汤龙梅,甘振华.便携式心电仪中数据存储机制的实现[J].福建工程学院学报,2015,0(4):381-387. |
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| 作者姓名： | 汤龙梅 甘振华 |
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| 作者单位： | 福建工程学院信息科学与工程学院 |
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| 摘 要： | 针对便携式心电仪数据存储需求，设计基于SDIO接口的SD卡底层驱动程序，并移植FatFS文件系统。同时，为降低存储开销，设计2-4-8-16变长码近似Huffman算法对一阶差分后的心电数据进行无损压缩；针对实验所用心电仪采集的一些心电数据，利用该算法平均可节省3/4以上的存储空间。实验结果表明，基于SD卡的文件存储机制通用性好，心电数据压缩算法时空开销小，可较好地满足便携式心电仪的数据存储需求。
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| 关 键 词： | 心电信号 数据存储 SDIO接口 数据压缩 变长编码 |
Implementation of data storage mechanism in portable ECG detecting instrument |
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| Tang Longmei,Gan Zhenhua.Implementation of data storage mechanism in portable ECG detecting instrument[J].Journal of Fujian University of Technology,2015,0(4):381-387. |
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| Authors: | Tang Longmei Gan Zhenhua |
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| Affiliation: | College of Information Science and Engineering, Fujian University of Technology |
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| Abstract: | A SD card driver based on SDIO interface was implemented and the FatFS file system was transplanted onto the driver to satisfy the data storage requirement in portable ECG instrument. A variant length coding algorithm of 2-4-8-16 bits that is similar to Huffman algorithm was designed to reduce the storage cost. When storing the compressed ECG data rather than the raw ECG data collected by the experimental ECG instrument, over three quarters of the storage space can be saved in average. With the versatility of file storage mechanism based on SD card and low space time costs of the compress algorithm, the proposed storage mechanism can well fulfill the demand of the portable ECG data storage. |
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| Keywords: | ECG signal data storage SDIO interface data compression variant length coding |
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