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Digital-Assisted Asynchronous Compressive Sensing Front-End

Jun Zhou, Mario Ramirez, Samuel Palermo, Sebastian Hoyos
2012 IEEE Journal on Emerging and Selected Topics in Circuits and Systems  
An -member Group-based Total Variation ( -GTV) algorithm is proposed for the sparse reconstruction of piecewise-constant signals.  ...  Analyses and simulations with a typical ECG recording system confirm that the proposed DACS front-end outperforms a conventional CS-based front-end using a random demodulator in terms of lower power consumption  ...  By packaging the timing information into a compact equivalent, the sampling rate for reconstruction is optimized.  ... 
doi:10.1109/jetcas.2012.2222218 fatcat:6nlrxsommnhpnp6b5lqp4ccbqa

PREPROCESSING METHOD FOR IMPROVING ECG SIGNAL CLASSIFICATION AND COMPRESSION VALIDATION [chapter]

L. GORAS, M. FIRA
2010 World Scientific Series on Nonlinear Science Series B  
A method for improving electrocardiogram (ECG) signal classification in time domain is presented.  ...  The main idea is to preprocess the segmented waveforms in order to obtain an alignment of the ECG with respect to the maximum value of the R beat while keeping the information on its initial position as  ...  The main idea of this paper is based on the finally fully confirmed conjecture that aligning ECG waveforms with respect to the R wave will increase the time domain techniques classification rate.  ... 
doi:10.1142/9789814313155_0004 fatcat:zfwsfxr4rrf6do5pwnuzw7g7gu

A wavelet transform-based ECG compression method guaranteeing desired signal quality

J. Chen, S. Itoh
1998 IEEE Transactions on Biomedical Engineering  
This paper presents a new electrocardiogram (ECG) compression method based on orthonormal wavelet transform and an adaptive quantization strategy, by which a predetermined percent root mean square difference  ...  Ishijima, Tokyo Women's Medical College, Tokyo, Japan, for providing the ECG database; President S. Takatori, Dr. G. Shou, and Dr. C.  ...  In direct methods, the compression is done directly on the ECG samples; examples include the amplitude zone time epoch coding (AZTEC), the turning point (TP), the coordinate reduction time encoding system  ... 
doi:10.1109/10.730435 pmid:9835190 fatcat:dxzripallngknlrqhs7awueroi

Limitations on the Re-use of patient specific coefficients for 12-lead ECG reconstruction

R.E. Gregg, S.H. Zhou, J.M. Lindauer, E.D. Helfenbein, D.Q. Feild
2008 2008 Computers in Cardiology  
We used a data set of 1493 resting 12-lead ECGs from 224 patients. Waveform comparisons were made between recorded 12-lead and reconstructed cases using RMS difference.  ...  A more convenient approach is either the use of population based coefficients (POP) or patient specific coefficients from an old 12-lead ECG (patientspecific multi-use or PSM).  ...  Waveform reconstruction error was calculated based on average beats.  ... 
doi:10.1109/cic.2008.4749014 fatcat:wxwga6iupnehtclffyyyxfflve

Study on a Low Complexity ECG Compression Scheme with Multiple Sensors [article]

Pengda Huang
2017 arXiv   pre-print
Different from the traditional ECG compressors, most of which are built on a single sensor, our compression scheme is based on multiple ECG sensors.  ...  Experimental results show that our method outperforms conventional ones with respect to ECG reconstruction accuracy at the same bit rate consumption  ...  Fig. 11 and Fig. 12 illustrate the reconstructed ECG waveform at a fixed bit width of 8.  ... 
arXiv:1704.01612v1 fatcat:5tukqvkvxbhpjgdt6i4hiouuzq

Compression of Digital Biomedical Signals [chapter]

A Enis Cetin, Hayrettin Köymen
1999 Electrical Engineering Handbook  
It reduces the sampling frequency of an ECG signal by a factor of two. The method is based on the trends of the signal samples. Three input samples are processed at a time.  ...  Due to this reason WT based waveform coding methods are essentially similar to the SBC based methods.  ...  Information Biomedical signal compression is a current research area and most of the research articles describing the advances in biomedical data compression appear in the following journals; IEEE Transactions on  ... 
doi:10.1201/9781420049510.ch54 fatcat:riu6tmegknh4ne6rhct6sp3cpq

Recommendations for standardization and specifications in automated electrocardiography: bandwidth and digital signal processing. A report for health professionals by an ad hoc writing group of the Committee on Electrocardiography and Cardiac Electrophysiology of the Council on Clinical Cardiology, American Heart Association

J J Bailey, A S Berson, A Garson, L G Horan, P W Macfarlane, D W Mortara, C Zywietz
1990 Circulation  
Based on 100 Hz bandwidth, in 1975, the AHA7 recommended a minimum sampling rate of 500 Hz for equal-interval sampling, recognizing the need for a sampling rate two to three times the theoretical minimum  ...  Zywietz'4,15 modeled ECG waves with triangular, parabolic, and bell-shaped waveforms and showed that a waveform of 16 msec can be reconstructed with a maximum error of 10% when the sampling rate is 500  ... 
doi:10.1161/01.cir.81.2.730 pmid:2297875 fatcat:5ncxxumatrafpe6tymsqn5z7ly

ECG-based waveform characterization of atrial fibrillation

M. Stridh, A. Bollmann, D. Husser, L. Sornmo
2007 2007 Computers in Cardiology  
In atrial fibrillation (AF), the body surface signal pattern varies considerably from one patient to another as well as over time.  ...  We have developed a new method for ECG-based characterization of AF which explores the morphology of the f-waves.  ...  The body surface signal pattern of AF varies considerably from one patient to another as well as over time and between leads which has been shown using, e.g., approaches based on time-frequency analysis  ... 
doi:10.1109/cic.2007.4745473 fatcat:jytf3isnyjegrp5gvuoszjg3hm

Determination of delay time in individual transfer function for central aortic pressure reconstruction

DanYang Yu, HaiYang Xiang, DeYu Li, YuQi Wang, MengSun Yu
2014 Science China Life Sciences  
Thus, the t should be determined by PCG for central aortic pressure reconstruction in practice. central aortic pressure, delay time, PCG, ECG  ...  Because the pre-ejection period remains an uncertain factor, the present study used ECG and PCG to define the delay time and analyzed the accuracy of the reconstruction results.  ...  Thus, this study confirmed the distinction of the reconstructed results computed by PCG and ECG and concluded that the optimal determination of the delay time is based on PCG.  ... 
doi:10.1007/s11427-014-4651-0 pmid:24771062 fatcat:hiaqrhro2rfttidohqek3wwdwq

A 457 nW Near-Threshold Cognitive Multi-Functional ECG Processor for Long-Term Cardiac Monitoring

Xin Liu, Jun Zhou, Yongkui Yang, Bo Wang, Jingjing Lan, Chao Wang, Jianwen Luo, Wang Ling Goh, Tony Tae-Hyoung Kim, Minkyu Je
2014 IEEE Journal of Solid-State Circuits  
Based on this observation, it is reasonable to apply a high sampling rate only for the QRS segment, while applying a low sampling rate for the rest of the waveform, as shown in Fig. 3 (b).  ...  Table Iprovides the ECG signal spectrum analysis based on WT decomposition of several ECG processing schemes.  ... 
doi:10.1109/jssc.2014.2338870 fatcat:vx3toilxszepfnhgpizyzx7hmy

Discrete Wavelet Transform Based Algorithm for Recognition of QRS Complexes [article]

Rachid Haddadi, Elhassane Abdelmounim, Mustapha El Hanine, Abdelaziz Belaguid
2017 arXiv   pre-print
Wavelet Transform provides localization in both time and frequency. In preprocessing stage, DWT is used to remove the baseline wander in the ECG signal.  ...  This paper proposes the application of Discrete Wavelet Transform (DWT) to detect the QRS (ECG is characterized by a recurrent wave sequence of P, QRS and T-wave) of an electrocardiogram (ECG) signal.  ...  One can choose the level of decomposition j based on a desired cutoff frequency.  ... 
arXiv:1703.00075v1 fatcat:vbpjooyavzdmjcdjgy4aekc7oi

An Ultra-Low Power Turning Angle Based Biomedical Signal Compression Engine with Adaptive Threshold Tuning

Jun Zhou, Chao Wang
2017 Sensors  
It extracts the feature points of the biomedical signal by window-based turning angle detection.  ...  Near-threshold design technique is adopted to further reduce the power consumption on the circuit level.  ...  However, a low sampling rate will cause missing or inaccurate detection of PT peaks, which are equivalently important as the QRS peaks in the ECG diagnosis.  ... 
doi:10.3390/s17081809 pmid:28783079 pmcid:PMC5579728 fatcat:lgqjjpk56rhl5i6tre5kt3x3qa

Multilead Estimation Of T-Wave Alternans In The Ecg Using Principal Component Analysis

Pablo Laguna, Juan Pablo Martínez, Violeta Monasterio
2008 Zenodo  
Let us denote bŷ a l (n) the n-th sample of the estimated alternans waveform in the l-th lead, and by a l (n) the same sample of the true alternans waveform.  ...  Note that˜ is equivalent to a spatially filtered version of , where the aim of the equivalent filter is to preserve the alternans content, not to obtain a perfect reconstruction.  ... 
doi:10.5281/zenodo.40751 fatcat:rcffaehk65e4ppczcd7oeckkju

Measuring Dynamic Signals with Direct Sensor-to-Microcontroller Interfaces Applied to a Magnetoresistive Sensor

Ernesto Sifuentes, Rafael Gonzalez-Landaeta, Juan Cota-Ruiz, Ferran Reverter
2017 Sensors  
Such an analysis reveals that there is a trade-off between the sampling frequency and the resolution of the measurement, and this depends on the selected value of the capacitor that forms the RC circuit  ...  This performance is then experimentally proved with a DIC measuring a magnetoresistive sensor exposed to a magnetic field of different frequencies, amplitudes, and waveforms.  ...  The signal reconstructed from the samples acquired by the DIC was very similar to the original one monitored by the oscilloscope.  ... 
doi:10.3390/s17051150 pmid:28524078 pmcid:PMC5470896 fatcat:2ewva3nasbhxff73v2snd5iokm

Compression of ECG Signal Based on Compressive Sensing and the Extraction of Significant Features

Mohammed M. Abo-Zahhad, Aziza I. Hussein, Abdelfatah M. Mohamed
2015 International Journal of Communications, Network and System Sciences  
CS provides a new approach concerned with signal compression and recovery by exploiting the fact that ECG signal can be reconstructed by acquiring a relatively small number of samples in the "sparse" domains  ...  Based on the fact that these signals can be approximated by a linear combination of a few coefficients taken from different basis, an alternative new compression scheme based on Compressive Sensing (CS  ...  Figure 11 .Figure 12 . 1112 varying the signal length on the sparisty in the time-domain The signal length (varying the signal length on the sparisty in the time-domain The signal length (samples) Effect  ... 
doi:10.4236/ijcns.2015.85013 fatcat:wepjh7ehaffjrgflkktuxsdgpq
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