Multi-lead ECG data compression with orthogonal expansions: KLT and wavelet packets

Author

Olmos, S. ; Laguna, P.

Author_Institution

Electron. & Commun. Eng. Dept., Zaragoza Univ., Spain

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

539

Lastpage

542

Abstract

Presents the extension of transform coding compression methods to multilead ECG recordings in order to reduce the inter-lead correlation. Two orthogonal expansions are considered: the Karhunen-Loeve transform and a fast approximation of it based on wavelet packets, also known as best basis algorithm. The multilead compression algorithm with wavelet packets achieves an average compression ratio of 30.5:1 in two-leads records from MIT-BIH Arrythmia database, in contrast to 21.4:1 for the single-lead algorithm with the same distortion. Better results could be obtained in ECG recordings with more than two leads

Keywords

Karhunen-Loeve transforms; algorithm theory; data compression; electrocardiography; medical signal processing; transform coding; wavelet transforms; Karhunen-Loeve transform; MIT-BIH Arrythmia database; average compression ratio; best basis algorithm; inter-lead correlation; multi-lead ECG data compression; multilead ECG recordings; multilead compression algorithm; orthogonal expansions; single-lead algorithm; transform coding compression methods; two-leads records; wavelet packets; Basis algorithms; Covariance matrix; Data compression; Databases; Electrocardiography; Karhunen-Loeve transforms; Parameter extraction; Signal processing; Wavelet packets; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 1999

Conference_Location

Hannover

ISSN

0276-6547

Print_ISBN

0-7803-5614-4

Type

conf

DOI

10.1109/CIC.1999.826027

Filename

826027