Denoising method, system and device for fetal heart sound and storage medium

Abstract

The invention discloses a denoising method, system and device for fetal heart sound and a storage medium. The method comprises the steps that an acquired fetal heart sound audio signal is converted into a reconstructed matrix of a digital signal, the reconstructed matrix is subjected to singular value decomposition, and an original component signal corresponding to each singular value is calculated through inversion; according to frequency domain signal characteristics of the original component signals, the original component signals with the frequency domain signal characteristics identical to those of the fetal heart sound audio signal are selected, and after the selected original component signals are subjected to superposition, a fetal heart sound denoising signal is obtained. According to the method, selection of the singular values is converted to the frequency domain, by comparing consistency of the frequency characteristics of the component signals and the fetal heart sound audio signal, selection is conducted, by contrasting and analyzing the relevance of the frequency domain signal characteristics of the component signals corresponding to the singular values and the frequency characteristics of the fetal heart sound audio signal, selection is conducted, the method better accords with actual application, and accordingly the more accurate denoising signal is obtained. The method can be widely applied to the technical field of fetal heart sound processing.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps reduce unwanted sounds from fetuses during medical procedures such as ultrasound scans or other diagnostic tests. By converting an acoustic waveform recorded through their mother's breast tissue onto another medium called a reconstructing matrix (RM), this process removes unnecessary signals while maintaining important details about how they were generated. Overall, these technical improvements help improve accuracy when processing sonographic images captured on different types of media like x-ray films or magnetic resonance imagers.

Problems solved by technology

This patented technical problem addressed by the present inventors relates to removing unwanted signals that may occur while analyzing fetal hearings like bullfeces or uterine activity. Current techniques involve selecting specific numbers based upon their importance but they cannot accurately identify these sources due to interference between different types of background noise such as tissue patterns caused by maternal movements.

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