ECG Compression - ECG Acquisition and Automated Remote Processing - page 111

Fig. 5.8 Data plot before compression and after decompression using mit-db record (using
down-sampling) (a) c-db data; (b) mit-db data

Table 5.7 DDF parameter estimation for c-db

RR i QRS dur QT int P width

0.202 3.72 2.08 1.31

P ampl S ampl T ampl R ampl

0.92 2.2 3.81 1.92

(i.e., 1 in 255) and 0.78 % (i.e., 2 in 255) are used. The differences up to these
threshold levels are taken as zero. By this modification, the equipotential segments
generate more number of consecutive zero elements, P and T waves are not
significantly distorted, and QRS is undistorted. It is observed with threshold of