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A fetal heart sound denoising method, system, device and storage medium

A fetal heart sound, consistent technology, applied in the field of fetal heart sound denoising method, system, device and storage medium, can solve the problems of inaccurate fetal heart sound signal, difficult to distinguish primary and secondary, etc.

Active Publication Date: 2021-09-07
SOUTH CHINA NORMAL UNIVERSITY +1
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Problems solved by technology

However, because fetal heart sounds are often mixed with noise when extracting fetal heart sounds, it is often difficult to distinguish the primary and secondary sounds. When this scheme is applied to the noise reduction processing of fetal heart sounds, the extracted fetal heart sound signals are generally inaccurate

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  • A fetal heart sound denoising method, system, device and storage medium
  • A fetal heart sound denoising method, system, device and storage medium
  • A fetal heart sound denoising method, system, device and storage medium

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Embodiment Construction

[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.

[0053] Such as figure 1 As shown, the embodiment of the present invention provides a fetal heart sound denoising method, which includes the following steps.

[0054] S1. Convert the acquired fetal heart sound audio signal into a digital signal reconstruction matrix.

[0055] S2. Perform singular value decomposition on the reconstructed matrix to obtain several singular values, and inversely calculate original component signals corresponding to the several singular values.

[0056]S3. According to the frequency-doma...

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Abstract

The invention discloses a fetal heart sound denoising method, system, device and storage medium, comprising the steps of: converting the acquired fetal heart sound audio signal into a digital signal reconstruction matrix, performing singular value decomposition on the reconstruction matrix and reverse Calculate the original component signal corresponding to each singular value, select the original component signal whose frequency domain signal feature is consistent with the frequency domain signal feature of the fetal heart sound audio signal according to the frequency domain signal feature of the original component signal, and superimpose The fetal heart sound noise reduction signal is obtained after selecting the original component signal. The present invention transforms the selection of the singular value to the frequency domain, selects by comparing the frequency characteristics of the component signal and the fetal heart sound audio signal, and compares and analyzes the frequency domain signal characteristics of the component signal corresponding to the singular value and the fetal heart sound audio signal. The correlation of frequency features is selected, which is more in line with practical applications, so as to obtain more accurate noise reduction signals. The invention can be widely used in the technical field of fetal heart sound processing.

Description

technical field [0001] The present invention relates to fetal heart sound processing technology, in particular to a fetal heart sound denoising method, system, device and storage medium. Background technique [0002] Fetal heart sound is the heartbeat of the fetus, which can be heard through the abdomen of pregnant women at 18-20 weeks of pregnancy. Fetal heart sounds play an important role in monitoring the health of the fetus. However, the sounds heard through the abdomen of pregnant women include fetal heartbeat, bowel sounds, mother's heartbeat sounds, amniotic fluid sounds during fetal movement, and mother's voice, etc. Among them, bowel sounds, amniotic fluid sounds, and mother's voice are all Random sounds without any regular frequency. How to remove the noise in the fetal heart sound, so as to facilitate the subsequent calculation of fetal heart rate and monitor the health status of the fetus, is an essential work for fetal heart sound preprocessing. [0003] In r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B7/04
CPCA61B7/04
Inventor 张金区钱朗熊孝天欧建荣宋立国罗虎
Owner SOUTH CHINA NORMAL UNIVERSITY
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