Subband-Adaptive Shrinkage for Denoising of ECG Signals

  • S. PoornachandraEmail author
  • N. Kumaravel
Open Access
Research Article


This paper describes subband dependent adaptive shrinkage function that generalizes hard and soft shrinkages proposed by Donoho and Johnstone (1994). The proposed new class of shrinkage function has continuous derivative, which has been simulated and tested with normal and abnormal ECG signals with added standard Gaussian noise using MATLAB. The recovered signal is visually pleasant compared with other existing shrinkage functions. The implication of the proposed shrinkage function in denoising and data compression is discussed.


Shrinkage Information Technology Gaussian Noise Quantum Information Data Compression 


  1. 1.
    Donoho DL: De-noising by soft thresholding. IEEE Transactions on Information Theory 1995, 41(3):613–627. 10.1109/18.382009MathSciNetCrossRefGoogle Scholar
  2. 2.
    Gao H-Y: Wavelet shrinkage denoising using the non-negative garrote. Journal of Computational and Graphical Statistics 1998, 7(4):469–488. 10.2307/1390677MathSciNetGoogle Scholar
  3. 3.
    Bruce GA, Gao H-Y: Understanding WaveShrink: variance and bias estimation. Biometrika 1996, 83(4):727–745. 10.1093/biomet/83.4.727MathSciNetCrossRefGoogle Scholar
  4. 4.
    Zhang X-P, Desai MD: Adaptive denoising based on SURE risk. IEEE Signal Processing Letters 1998, 5(10):265–267. 10.1109/97.720560CrossRefGoogle Scholar
  5. 5.
    Stein C: Estimation of the mean of a multivariate normal distribution. Annals of Statistics 1981, 9(6):1135–1151. 10.1214/aos/1176345632MathSciNetCrossRefGoogle Scholar
  6. 6.
    Gao H-Y, Bruce AG: Waveshrink with firm shrinkage. Statistica Sinica 1997, 7(4):855–874.MathSciNetzbMATHGoogle Scholar
  7. 7.
    Poornachandra S, Kumaravel N: Hyper-trim shrinkage for denoising of ECG signal. Digital Signal Processing 2005, 15(3):317–327.CrossRefGoogle Scholar

Copyright information

© Poornachandra and Kumaravel 2006

Authors and Affiliations

  1. 1.Department of Biomedical Engineering, SSN College of EngineeringAnna UniversityChennaiIndia
  2. 2.Department of Electronics and Communication EngineeringAnna UniversityChennaiIndia

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