Orthogonal transforms such as the Haar and discrete cosine transforms can be applied to compress electrocardiographic data.
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Warrants further preclinical testing of orthogonal transforms for ECG compression; leaves open human translation.
Electrocardiographic data compression via orthogonal transform processing is studied using canine ECG data. The Haar transform and the discrete cosine transform are considered. While the basis vectors for the Haar transform are sampled rectangular waves, those for the discrete cosine transform are sampled sinusoids.
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Ahmed et al. (1975) studied this question.
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