RESPIRATORY SIGNAL PROCESSING APPARATUS, RESPIRATORY SIGNAL PROCESSING METHOD, AND PROGRAM
First Claim
Patent Images
1. A respiratory signal processing apparatus comprising:
- a pulse-based component detection unit configured to detect a pulse-based component from a first signal acquired from a living being; and
a pulse-based component removal unit configured to remove the detected pulse-based component from a second signal acquired from the living being, the second signal including respiratory sounds.
1 Assignment
0 Petitions
Accused Products
Abstract
A respiratory signal processing apparatus includes a pulse-based component detection unit configured to detect a pulse-based component from a first signal acquired from a living being, and a pulse-based component removal unit configured to remove the detected pulse-based component from a second signal acquired from the living being, the second signal including respiratory sounds.
-
Citations
14 Claims
-
1. A respiratory signal processing apparatus comprising:
-
a pulse-based component detection unit configured to detect a pulse-based component from a first signal acquired from a living being; and a pulse-based component removal unit configured to remove the detected pulse-based component from a second signal acquired from the living being, the second signal including respiratory sounds. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A respiratory signal processing apparatus comprising:
-
a time-to-frequency conversion unit configured to convert a measured respiratory signal obtained by measuring respiratory sounds of a living being to generate a frequency spectrum signal for each time segment; a tone-based component detection unit configured to detect a tone-based component from the frequency spectrum signal; a tone-based component removal unit configured to remove the detected tone-based component from the frequency spectrum signal; and a frequency-to-time conversion unit configured to inversely convert the frequency spectrum signal in which the tone-based component has been removed.
-
-
9. A respiratory signal processing method comprising:
-
detecting, as a candidate pulse-based component period, a period including a local maximum value in a measured respiratory signal obtained by measuring respiratory sounds of a living being; calculating a likelihood-of-pulse score for the candidate pulse-based component period; determining, as the pulse-based component, a signal included in a detection period, the detection period being a candidate pulse-based component period for which the likelihood-of-pulse score satisfies a certain threshold; reducing the detected pulse-based component in the measured respiratory signal; generating a composite waveform from a signal near the detection period; and adding the composite waveform to the measured respiratory signal to remove the detected pulse-based component.
-
-
10. A respiratory signal processing method comprising:
-
converting a measured respiratory signal obtained by measuring respiratory sounds of a living being to generate a frequency spectrum signal for each time segment; detecting a tone-based component from the frequency spectrum signal; removing the detected tone-based component from the frequency spectrum signal; and performing frequency-to-time conversion by inversely converting the frequency spectrum signal in which the tone-based component has been removed.
-
-
11. A respiratory signal processing method comprising:
-
synchronizing a measured respiratory signal and a measured heartbeat signal with each other, the measured respiratory signal being obtained by measuring respiratory sounds of a living being, the measured heartbeat signal being obtained by measuring a heartbeat waveform of the living being; estimating heart sounds from the measured heartbeat signal; and removing the estimated heart sounds from the synchronized measured respiratory signal.
-
-
12. A program for causing a computer to execute:
-
detecting, as a candidate pulse-based component period, a period including a local maximum value in a measured respiratory signal obtained by measuring respiratory sounds of a living being; calculating a likelihood-of-pulse score for the candidate pulse-based component period; determining, as the pulse-based component, a signal included in a detection period, the detection period being a candidate pulse-based component period for which the likelihood-of-pulse score satisfies a certain threshold; reducing the detected pulse-based component in the measured respiratory signal; generating a composite waveform from a signal near the detection period; and adding the composite waveform to the measured respiratory signal to remove the detected pulse-based component.
-
-
13. A program for causing a computer to execute:
-
converting a measured respiratory signal obtained by measuring respiratory sounds of a living being to generate a frequency spectrum signal for each time segment; detecting a tone-based component from the frequency spectrum signal; removing the detected tone-based component from the frequency spectrum signal; and performing frequency-to-time conversion by inversely converting the frequency spectrum signal in which the tone-based component has been removed.
-
-
14. A program for causing a computer to execute:
-
synchronizing a measured respiratory signal and a measured heartbeat signal with each other, the measured respiratory signal being obtained by measuring respiratory sounds of a living being, the measured heartbeat signal being obtained by measuring a heartbeat waveform of the living being; estimating heart sounds from the measured heartbeat signal; and removing the estimated heart sounds from the synchronized measured respiratory signal.
-
Specification