单片机心电数据无损压缩方法研究与实现  

Research and Realization of ECG Data Lossless Compression Based on MCU

作　　者：张跃[1] 徐廷松[1] 

机构地区：[1]清华大学深圳研究生院嵌入式系统与技术实验室,深圳518055

出　　处：《医疗卫生装备》2008年第2期24-27,共4页Chinese Medical Equipment Journal

基　　金：湖南省重大专项基金

摘　　要：目的:研究实现能够在单片机上使用的心电数据无损压缩方法。方法:利用数字化心电数据本身信息冗余,采用直接差分压缩方法和基于一阶差分的2-4-8三字长编码压缩方法,并通过对MIT_BIH心电数据库中各种心电数据进行差分结果的统计,设计出最佳的三字长码表。结果:直接差分方法的压缩比小于2,三字长编码方法压缩比在3左右。结论:三字编码方式的压缩优于直接差分压缩方法,2种方法各有优缺点。Objective To develop a lossless compression algorithm applied on the MCU, Methods Direct difference data compression and 2-4-8 three-word-length coding data compression based on the first order difference were developed. Statistics on the results of the first order difference of ECG data in the MIT_BIH ECG database resulted in an optimal three-word-length code table. Results Direct difference data compression ratio was lower than 2, and three-word-length data compression ratio was around 3. Conclusion There are both advantages and disadvantages in two types of lossless data compression, but three-word-length data compression is superior to direct difference data eompression.

关 键 词：心电数据压缩 三字长编码 差分 

分 类 号：R318[医药卫生—生物医学工程]