AN EFFICIENT ECG DATA COMPRESSION METHOD

摘要

-An efficient ECG (Electrocardiogram) data compression algorithm called KPDEC (key point detection and error compensation) is presented in this pa-Per. With tkis KPDEC method only the key points (KPs) of ECG signals are con-sidered to be saved to make the compression more efficient. These KPs can be ex-tracted from ECG samples by calculating the second-ordered central difrerences.Then an error pre-correcting technique is used to let the saved sample having a rea-sonable compensation berore it is stored. This technique is able to reduce the PRD (Percentage Root Mean Square Difference) obviously. In the paper we describe an optimal cording sckeme for getting higer compression rate. Furthermore, an adap-tive filtering tecknique is designed for reconstructed ECG signals to get better fi-delity waves. The algorithm is able to compress ECG data to 168 bits per second with PRD less than 3%.