Design of a nearly linear-phase IIR filter and JPEG compression ECG signal in real-time system
Autor: | Byung-Gak Kim, Junghwan Oh, Thi Mai Thien Vo, Ngoc Thang Bui, Jaeyeop Choi, Sumin Park, Thi My Tien Nguyen, Yeon-Hee Kang |
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Rok vydání: | 2021 |
Předmět: |
Computer science
0206 medical engineering Biomedical Engineering Health Informatics Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Huffman coding 03 medical and health sciences symbols.namesake 0302 clinical medicine Infinite impulse response Linear phase Adaptive algorithm business.industry computer.file_format 020601 biomedical engineering JPEG Filter (video) Signal Processing Personal computer symbols business computer 030217 neurology & neurosurgery Computer hardware Data compression |
Zdroj: | Biomedical Signal Processing and Control. 67:102431 |
ISSN: | 1746-8094 |
DOI: | 10.1016/j.bspc.2021.102431 |
Popis: | This paper presents the design of an Electrocardiogram (ECG) signal acquisition system based on 32-bit microprocessor platform. In hardware design, we present a complete design similar to the wearable devices used to monitor heart rates over the long term. The firmware is applied by an adaptive data compression method to increase storage space and reduces data transmission time between hardware devices and personal computer (PC). This adaptive algorithm is a combination of Joint Photographic Experts Group (JPEG) compression. The ECG signal was applied to the nearly-linear infinite impulse response (IIR) filter to eliminate noise from ECG signals. There are advantages of nearly-linear IIR filter over traditional IIR that the signal pass through filter is not distorted. Improvements in the JPEG compression algorithm make them suitable for one dimensional signals with a resolution greater than 8 bits and optimize the operation of the Huffman compression as well as the microcontroller unit (MCU) system with low processing speed. Placing the IIR filter at the end of the system promotes the ability to filter while reducing signal distortion after the decompression process. We tested the system with 8 records from the MIT/BIH cardiac arrhythmic database before and after we applied the compression algorithm to the firmware and software in the system that shows the effectiveness of these algorithms. The test results show that the system reached a maximum compression ratio of 8,8. The system deployed on the 32bit MCU (PIC32MZ2048), ECG analog front-end ADS1293 and operation time of ECG device up to 110 h (4.5 days). |
Databáze: | OpenAIRE |
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