In view of the shortcomes of conventional ElectroCardioGram (ECG) compression algo- rithms,such as high complexity of operation and distortion of reconstructed signal,a new ECG compression encoding algorithm based on ...In view of the shortcomes of conventional ElectroCardioGram (ECG) compression algo- rithms,such as high complexity of operation and distortion of reconstructed signal,a new ECG compression encoding algorithm based on Set Partitioning In Hierarchical Trees (SPIHT) is brought out after studying the integer lifting scheme wavelet transform in detail.The proposed algorithm modifies zero-tree structure of SPIHT,establishes single dimensional wavelet coefficient tree of ECG signals and enhances the efficiency of SPIHT-encoding by distributing bits rationally,improving zero-tree set and ameliorating classifying method.For this improved algorithm,floating-point com- putation and storage are left out of consideration and it is easy to be implemented by hardware and software.Experimental results prove that the new algorithm has admirable features of low complexity, high speed and good performance in signal reconstruction.High compression ratio is obtained with high signal fidelity as well.展开更多
针对传统心电监护装置电路结构复杂、体积大、携带不便等问题,设计一种高度集成的便携式无线心电监护系统。系统采用模拟前端SOC(System On Chip)芯片ADS1298作为心电信号(ECG:Electro Cardio Gram)测量的核心芯片,结合高速、低功耗的...针对传统心电监护装置电路结构复杂、体积大、携带不便等问题,设计一种高度集成的便携式无线心电监护系统。系统采用模拟前端SOC(System On Chip)芯片ADS1298作为心电信号(ECG:Electro Cardio Gram)测量的核心芯片,结合高速、低功耗的单片机STC12LE5A60S2以及无线传输模块,再将ECG数据传输给上位机,由Lab VIEW软件编写的程序完成ECG信号处理。测试结果表明,该系统具有电路结构简单、体积小,抗干扰能力强、便携式、高精度等优点,有利于对心血管疾病的院前发现、防治和远程诊治,同时降低了心源性猝死的发生率。展开更多
文摘In view of the shortcomes of conventional ElectroCardioGram (ECG) compression algo- rithms,such as high complexity of operation and distortion of reconstructed signal,a new ECG compression encoding algorithm based on Set Partitioning In Hierarchical Trees (SPIHT) is brought out after studying the integer lifting scheme wavelet transform in detail.The proposed algorithm modifies zero-tree structure of SPIHT,establishes single dimensional wavelet coefficient tree of ECG signals and enhances the efficiency of SPIHT-encoding by distributing bits rationally,improving zero-tree set and ameliorating classifying method.For this improved algorithm,floating-point com- putation and storage are left out of consideration and it is easy to be implemented by hardware and software.Experimental results prove that the new algorithm has admirable features of low complexity, high speed and good performance in signal reconstruction.High compression ratio is obtained with high signal fidelity as well.
