title: Hybrid method based on singular value decomposition and embedded zero tree wavelet technique for ECG signal compression.
abstract: OBJECTIVE
  In the field of biomedical, it becomes necessary to reduce data quantity due to the limitation of storage in real-time ambulatory system and telemedicine system. Research has been underway since very beginning for the development of an efficient and simple technique for longer term benefits.
  
  
  METHODS
  This paper, presents an algorithm based on singular value decomposition (SVD), and embedded zero tree wavelet (EZW) techniques for ECG signal compression which deals with the huge data of ambulatory system. The proposed method utilizes the low rank matrix for initial compression on two dimensional (2-D) ECG data array using SVD, and then EZW is initiated for final compression. Initially, 2-D array construction has key issue for the proposed technique in pre-processing. Here, three different beat segmentation approaches have been exploited for 2-D array construction using segmented beat alignment with exploitation of beat correlation. The proposed algorithm has been tested on MIT-BIH arrhythmia record, and it was found that it is very efficient in compression of different types of ECG signal with lower signal distortion based on different fidelity assessments.
  
  
  RESULTS
  The evaluation results illustrate that the proposed algorithm has achieved the compression ratio of 24.25:1 with excellent quality of signal reconstruction in terms of percentage-root-mean square difference (PRD) as 1.89% for ECG signal Rec. 100 and consumes only 162bps data instead of 3960bps uncompressed data.
  
  
  CONCLUSIONS
  The proposed method is efficient and flexible with different types of ECG signal for compression, and controls quality of reconstruction. Simulated results are clearly illustrate the proposed method can play a big role to save the memory space of health data centres as well as save the bandwidth in telemedicine based healthcare systems.
authors: PDPM Indian Institute of Information Technology, Design and Manufacturing Jabalpur, Jabalpur 482005, India. Electronic address: ranjeet281@gmail.com.
authors: Ranjeet
authors: R
authors: Kumar
authors: PDPM Indian Institute of Information Technology, Design and Manufacturing Jabalpur, Jabalpur 482005, India. Electronic address: anilkdee@gmail.com.
authors: A
authors: A
authors: Kumar
authors: Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India. Electronic address: gksngfee@gmail.com.
authors: G K
authors: GK
authors: Singh
mesh_terms: D000465:Algorithms; D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D004562:Electrocardiography / Q000379:methods*; D006801:Humans
keywords: ECG compression; EZW; Healthcare; SVD; Telemedicine; Wavelet