为呼吸阶段检测优化MFCC参数
Assel K Zhantleuova1, Yerbulat K Makashev2, Nurzhan T Duzbayev1
1Department of Computer Engineering, International Information Technology University, Almaty 050040, Kazakhstan.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
优化Mel频率塞普斯特尔系数 (MFCC) 参数可以显著提高呼吸阶段检测的准确性. 优化设置可以提高临床监测应用的分类性能.
科学领域:
- 生物医学工程
- 信号处理
- 数字健康
背景情况:
- 呼吸阶段检测对于临床和数字健康应用至关重要.
- 标准的Mel频率 Cepstral系数 (MFCC) 设置往往会产生低于最佳的分类性能.
- 需要改进呼吸声分析的特征提取方法.
研究的目的:
- 为增强呼吸阶段检测系统地优化Mel频率塞普斯特尔系数 (MFCC) 的参数.
- 使用支持矢量机 (SVM) 和深度学习模型评估MFCC参数优化对分类准确性的影响.
- 在实时临床应用中确定准确性和延迟之间的实际权衡.
主要方法:
- 使用了1500个呼吸声段的专有数据集.
- 包括系数数量,长度和跳跃长度在内的Mel频率塞普斯特尔系数 (MFCC) 参数被系统优化.
- 使用支持矢量机器 (SVM) 评估分类性能,并与深度学习模型 (VGGish,YAMNet,MobileNetV2) 进行比较.
主要成果:
- 最佳的MFCC参数 (30系数,800毫秒的长,10毫秒的跳跃长) 实现了87.16%的准确性,比默认设置 (80.96%) 显著改善.
- 优化的MFCC表现出相当于或优于已知的深度学习方法的性能.
- 在临床上实用的200 - 300毫秒的长度提供了准确度 (85. 08%) 和延迟之间的有利平衡.
结论:
- 优化的MFCC参数大大提高了呼吸阶段分类的准确性.
- 这些优化的参数为实时呼吸监测提供了高效和可解释的解决方案.
- 建议在不同的临床环境中进一步验证并探索高级学习策略.
相关概念视频
01:30Mechanism of Breathing I: Inspiration
1.8K
Introduction to Inspiration: The Respiratory System in Action
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
1.8K
01:05Breathing
60.3K
The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
60.3K
01:18Neural Control of Respiration
2.9K
The neural regulation of respiration is a meticulously coordinated process primarily controlled by the respiratory centers located within the brainstem. These centers, composed of specialized neurons, transmit nerve impulses that control the contraction and relaxation of our respiratory muscles.
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
2.9K
01:23Mechanism of Breathing II: Expiration
1.3K
The Physiology of Expiration: A Seamless Respiratory Process
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
1.3K