KLT-BASED QUALITY CONTROLLED COMPRESSION OF SINGLE-LEAD ECG

An electrocardiogram (ECG) compression algorithm based on a combinatio n of the Karhunen-Loeve transform (KLT) and multirate sampling is intr oduced. The use of multirate sampling reduces KLT computational times to those reported for wavelet-packet-based compression techniques. A b eat-by-beat quality controlled compression criterion is shown to be ne cessary to ensure clinically adequate reconstruction of each beat. The resulting quality controlled algorithm efficiently achieves compressi on rates of approximately 30-40:1 for the MIT-BIH database.