MUMBAI, India, Sept. 12 -- Intellectual Property India has published a patent application (202421015908 A) filed by Tata Consultancy Services Limited, Maharashtra, on March 6, 2024, for 'attractor reconstruction approach for respiration rate estimation.'
Inventor(s) include Jayaraman, Srinivasan; and Kalimuthu Rameshwaran, Arunkumar.
The application for the patent was published on Sept. 12, under issue no. 37/2025.
According to the abstract released by the Intellectual Property India: "The embodiments of present disclosure address limitations in Respiratory Rate (RR) estimation. Embodiments provide a method and system for respiration rate estimation from Photoplethysmogram (PPG) signal using an attractor reconstruction approach. Herein, an entire range of PPG signals, both the raw signal and its frequency component, is used. The PPG signal is projected into a new plane in a windowed segment, which results in a 3D phase space signal. The new plane signal is used for estimating the RR, that prevails with low-frequency components. An Attractor Reconstructor (AR) technique helps to quantify multi-physiological parameters effectively. The AR-based solution is independent of physiological conditions and motion artifacts. The AR technique extracts respiratory signals and estimates the RR without discarding the vital signal. Here, the naturally occurring baseline variation is separated by projecting the attractor onto a phase space using a delay coordinated from which new quantitative measures are obtained."
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