ECG Signal Handling, Using Differential Pulse Code Modulation Scheme
Subject Areas : electrical and computer engineeringH. B. Bahar 1 , Y. S. Khiabani 2
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Keywords: DPCM predictor quantizer ECG signal MSE,
Abstract :
Differential pulse code modulation (DPCM) system plays an important role in communication systems. In this paper a considerable amount of theoretical analysis has been carried out on DPCM structure, degree of predictor and quantizer unit. Simulation has been done using DPCM scheme. Here, instead of direct coding of signal, difference between two signals, input to DPCM and estimated output, is encoded. Consequently, application of the difference signal to quantizer unit, fewer bits for each sample is achieved at the output of the quantizer unit. In this study, Levinson-Durbin algorithm is utilized to design the optimal predictor. For the optimal quantized levels, classical together with Lloyd method are employed. Finally, second order predictor together with optimal quantized levels, 2-bit for normal case and 3-bit for optimal case, is successfully achieved to process ECG signal at DPCM scheme.
[1] هاريسون، اصول طب داخلي هاريسون: بيماريهاي قلب و عروق، زير نظر س. ح. عارفي، ح. چاپ اول، تهران، مركز نشر اشارات، 1373.
[2] L. Hui and T. Kogure, "An adaptive hybrid DPCM/DCT method for video coding," Signal Processing: Image Communication, vol. 5, no. 1-2, pp. 199-208, Feb. 1993.
[3] J. Li and C. N. Manikopoulos, "Nonlinear prediction with neural networks applied to 1-D DPCM image coding," J. of Visual Communication and Image Representation, vol. 3, no. 3, pp. 247-254, Sep. 1992.
[4] H. Balazadeh Bahar, Digital Filtering Techniques Having Improved Computational Efficiency, Cardiff, UK, 1982.
[5] K. S. Shanmugan, Digital and Analog Communication System, John Wiley and Sons Inc, 1979.
[6] A. V .Openheim and R. W. Schafer, Discrete Time Signal Processing, Prentice - Hall, 1989.
[7] S. S. Haykin, Adaptive Filter Theory, Englewood Cliffs, N.J., Prentice - Hall, 2002.
[8] A. Spanias, MATLAB Adaptive Filtering, and Predication, Mar. 2002.
