Title: Comparative studies of discrete cosine transform and lifting wavelet transform techniques for compression of blood pressure signal in salt sensitive Dahl rat
Authors: Vibha Aggarwal; Manjeet Singh Patterh; Virinder Kumar Singla
Addresses: College of Engineering and Management, Punjabi University Neighborhood Campus, Rampura Phul – 151103, Punjab, India ' University College of Engineering, Punjabi University Patiala, 147002 Punjab, India ' College of Engineering and Management, Punjabi University Neighbourhood Campus, Rampura Phul – 151103 Punjab, India
Abstract: This paper introduces a study based on quality controlled discrete cosine transform (DCT) and lifting wavelet transform (LWT) based compression method for blood pressure signal compression in salt sensitive Dahl rat. The transformed coefficients are thresholded using the bisection algorithm to match the predefined user specified percentage root mean square difference (PRD) within the tolerance. Then, the binary lookup table is made to store the position map for zero and non-zero coefficients (NZC). The NZC are quantised by Max-Lloyd quantiser followed by arithmetic coding. Lookup table is encoded by Huffman coding. The results are presented on different blood pressure signals of varying characteristic. There is no significant difference in before quantisation PRD (BPRD) and after quantisation PRD (QPRD) in various signals in both transforms. Mean compression ratio increases with an increase in user define PRD (UPRD).
Keywords: blood pressure signal; salt sensitive Dahl rat; compression; nonlinear transform; linear transform.
International Journal of Computational Systems Engineering, 2018 Vol.4 No.2/3, pp.165 - 170
Received: 31 Oct 2016
Accepted: 09 May 2017
Published online: 30 Apr 2018 *