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Efficient Compression of ECG Signals based on two dimensional wavelet transform and DCT decimation
by Morteza Moazami-Goudarzi, Hamid Reza Rabiee, Mohammed Ghanbari
12th International Workshop on Systems, Signals and Image Processing (IWSSIP), Vol. 1, No. 1, 2005
Abstract: An ECG signal is composed of many similar beats which makes it to behave semi-periodic. This paper deals with beat variation periods and exploits the correlation between cycles (inter-beat) and correlation within each cycle (intra-beat) for compression. For efficient compression a 2-dimensional array is constructed from the one dimensional ECG signal using decimation and interpolation in the discrete cosine transform (DCT) domain. Since reasonable results in image compression have been achieved by means of set partitioning in hierarchical trees (SPIHT) algorithm, we use SPIHT algorithm to code the 2-D wavelet transform of the ECG signals. Experimental results on selected records of ECG from the MIT-BIH arrhythmia database indicate that the proposed algorithm is significantly more efficient than those schemes previously proposed for ECG compression.

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