Journal of Electronic Systems Yun-Hong Noh, Do-Un Jeong 7 1 2017 http://www.dline.info/jes/fulltext/v7n1/jesv7n1_2.pdf In this paper, a segmentation template matching-based electrocardiogram compression algorithm for mobile device applications is proposed and implemented. Templates for PQ interval, QRS complex, and ST interval are created. Only the template code that closely matches the input signal is saved. The algorithm’s performance is evaluated using the Massachusetts Institute of Technology–Boston’s Beth Israel Hospital Normal Sinus Rhythm Database and with a different sampling rate. When using a 128-Hz sampling rate, the average compression ratio and percentage of root mean square difference are 7.94 and 5.33, respectively.