Title:
METHOD AND APPARATUS FOR A MORPHOLOGY-PRESERVING SMOOTHING
Document Type and Number:
WIPO Patent Application WO2002009582
Kind Code:
A3
Abstract:
A method and apparatus for implementing a signal morphology preservation smoothing scheme. The smoothing scheme includes generating an output signal representative of a filtered version of the input signal, wherein the output signal is generated by adaptively removing low amplitude, high frequency noise components while simultaneously preserving signal morphology of the input signal. The smoothing scheme includes comparison of a distance metric against a distance threshold to determine whether an initial smoothed version of the input signal would be oversmoothed or undersmoothed. Then the smoothing scheme appropriately increments, decrements, or maintains the initial level of smoothing to generate an optimal smoothed signal representative of the output signal.
Inventors:
LOVETT ERIC G
SWEENEY ROBERT J
SWEENEY ROBERT J
Application Number:
PCT/US2001/041440
Publication Date:
August 15, 2002
Filing Date:
July 26, 2001
Export Citation:
Assignee:
CARDIAC PACEMAKERS INC (US)
International Classes:
H03H17/02; H03H21/00; A61B5/308; A61N1/39; (IPC1-7): H03H17/02; H03H21/00
Foreign References:
| US4606009A | 1986-08-12 | |||
| US5546332A | 1996-08-13 |
Other References:
CABO C ET AL: "DIGITAL FILTERING FOR ELECTROGRAM SIGNAL PROCESSING", PROCEEDINGS OF THE COMPUTERS IN CARDIOLOGY MEETING. LEUVEN, SEPT. 12 - 15, 1987, WASHINGTON, IEEE COMP. SOC. PRESS, US, vol. MEETING 14, 12 September 1987 (1987-09-12), pages 541 - 544, XP000124755
CHEE-HUNG HENRY CHU ET AL: "IMPULSIVE NOISE SUPPRESSION AND BACKGROUND NORMALIZATION OF ELECTROCARDIOGRAM SIGNALS USING MORPHOLOGICAL OPERATORS", IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, IEEE INC. NEW YORK, US, vol. 36, no. 2, 1 February 1989 (1989-02-01), pages 262 - 273, XP000097075, ISSN: 0018-9294
CHEE-HUNG HENRY CHU ET AL: "IMPULSIVE NOISE SUPPRESSION AND BACKGROUND NORMALIZATION OF ELECTROCARDIOGRAM SIGNALS USING MORPHOLOGICAL OPERATORS", IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, IEEE INC. NEW YORK, US, vol. 36, no. 2, 1 February 1989 (1989-02-01), pages 262 - 273, XP000097075, ISSN: 0018-9294
Download PDF: