Wavelet packets feasibility study for the design of an ECG compressor.
Most of the recent electrocardiogram (ECG) compression approaches developed with the wavelet transform are implemented using the discrete wavelet transform. Conversely, wavelet packets (WP) are not extensively used, although they are an adaptive decomposition for representing signals. In this paper, we present a thresholding-based method to encode ECG signals using WP. The design of the compressor has been carried out according to two main goals: (1) The scheme should be simple to allow real-time implementation; (2) quality, i.e., the reconstructed signal should be as similar as possible to the original signal. The proposed scheme is versatile as far as neither QRS detection nor a priori signal information is required. As such, it can thus be applied to any ECG. Results show that WP perform efficiently and can now be considered as an alternative in ECG compression applications.
Blanco-Velasco
Manuel
M
Department of Teorfa de la Sefial y Comunicaciones, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain. manuel.blanco@uah.es
Cruz-Roldán
Fernando
F
Godino-Llorente
Juan Ignacio
JI
Barner
Kenneth E
KE
D000465:Algorithms; D016477:Artifacts; D044962:Data Compression / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D005240:Feasibility Studies; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted