TY - JOUR
T1 - Mixed-transform based codec for 2D compression of ECG signals
AU - Chagnon, Johan
AU - Rebollo-Neira, Laura
PY - 2020/9/1
Y1 - 2020/9/1
N2 - A method for ECG compression, by imaging the record as a 2D array and implementing a transform lossy compression strategy, is advanced. The particularity of the proposed transformation consists in applying a Discrete Wavelet Transform along one of the dimensions and the Discrete Cosine Transform along the other dimension. This renders a transformed array which is characterized by being sparse. Using the MIT-BIH Arrhythmia database, it is demonstrated that the proposed Mixed Transform achieves, in mean value, an improvement in sparsity of up to 3 times with respect to the 2D Wavelet Transform. This feature is beneficial for compression. The resulting codec produces a mean value compression ratio of 39 for a quality corresponding to PRD= 0.6. This PRD is attained for every record in the database without previous filtering.
AB - A method for ECG compression, by imaging the record as a 2D array and implementing a transform lossy compression strategy, is advanced. The particularity of the proposed transformation consists in applying a Discrete Wavelet Transform along one of the dimensions and the Discrete Cosine Transform along the other dimension. This renders a transformed array which is characterized by being sparse. Using the MIT-BIH Arrhythmia database, it is demonstrated that the proposed Mixed Transform achieves, in mean value, an improvement in sparsity of up to 3 times with respect to the 2D Wavelet Transform. This feature is beneficial for compression. The resulting codec produces a mean value compression ratio of 39 for a quality corresponding to PRD= 0.6. This PRD is attained for every record in the database without previous filtering.
UR - https://www.sciencedirect.com/science/article/abs/pii/S1746809420302238?via%3Dihub
U2 - 10.1016/j.bspc.2020.102067
DO - 10.1016/j.bspc.2020.102067
M3 - Article
SN - 1746-8094
VL - 62
JO - Biomedical Signal Processing and Control
JF - Biomedical Signal Processing and Control
M1 - 102067
ER -