ECG数据序列的TER_DCT压缩技术

TER_DCT Compression Technology of ECG Data Sequence

心电图数据长时间的记录保存需要进行高效压缩。本文研究了心电数据序列特征，结合ＤＣＴ变换编码的优点，提出了适合于压缩 ＥＣＧ数据序列的 ＴＥＲＭＣＴ 技术。该技术采用样条差分均值，进行准周期预测特征检测，获得高的ＱＲＳ检出率，对ＱＲＳ实施优化次数的平滑插值，有效地压缩了ＥＣＧ频带，提高了递归 ＤＣＴ压缩 ＥＣＧ数据序列的效率。实验证明，在医疗特征与波形保真度很高的情况下， ＴＥＲ＿ＤＣＴ对 ＥＣＧ数据序列的压缩比可达 １５．２。此项研究对 ＥＣＧ信号记录，传输与综合应用方面有重要的价值。

ECG data need to be compressed efficiently for the requirement of long time recording and preserving. Considering features of ECG and DCT, TER_DCT technique is presented. The technique adopts sector difference mean to implement efficient quasi-periodic predictive QRS detection. The frequency band of QRS is efficiently compressed with approximate optimal interpolation times. The efficiency of recursive DCT is improved with the technique. The experiment reveals that the compression ratio can reach 15.2 with high fidelity of medical feature and waveform. The research has important value to ECG data recording, transmitting, and integrated service applications.