Biometric Signal Compression via Period Segmentation
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Solution Overview
Problem
The challenge lies in efficiently compressing biometric signals like ECG, PPG, and PCG without losing main information, as lossy compression methods can result in data loss during decompression, affecting medical diagnostics.
Innovation Solution
An electronic apparatus that extracts one-period signals from the measured biometric signal, generates characteristic information, and compresses each signal, allowing for efficient compression while preserving key diagnostic information, and includes a decompression process to restore lost data based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If lossy compression method is used to compress biometric signal, then compression efficiency is improved, but main information of the signal is lost
Solution Approach 1:
The patent segments the biometric signal into multiple periods based on periodic characteristics (e.g., heartbeats in ECG). Each period is processed independently through compression, allowing preservation of critical periodic patterns while achieving efficient data reduction. This segmentation enables the system to maintain diagnostically important information while improving compression efficiency.
Solution Approach 2:
The patent changes compression parameters dynamically based on the specific period being processed. Different compression ratios, thresholds, or algorithms are applied to different periods depending on their diagnostic importance, signal characteristics, and required precision. This parameter adaptation allows optimization between compression efficiency and information preservation for each segment.
2Loss of information
If lossless compression method is used to compress biometric signal, then main information of the signal is preserved, but compression efficiency is lower
Solution Approach 1:
The patent divides the biometric signal into periodic segments, applying lossless or high-fidelity compression to each period. This segmentation allows the system to preserve critical diagnostic information within each period while achieving better overall compression ratios compared to processing the entire signal as a single block.
Solution Approach 2:
The patent applies partial compression action by selectively compressing certain periods more aggressively than others based on their diagnostic importance. Less critical periods may undergo more aggressive compression, while critical periods maintain higher fidelity, achieving a balance between information preservation and compression efficiency.
Data Source
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AI summary
Disclosed is an electronic apparatus for measuring a biometric signal, the electronic apparatus including: a measurer comprising measuring circuitry configured to measure a biometric signal of a person to be examined, and to generate a measured signal having a waveform corresponding to a characteristic of the biometric signal; a signal processor configured to process the generated measured signal; and a controller configured to control the signal processor to generate a compressed signal by compressing the measured signal and at least one piece of characteristic information included in a waveform of the measured signal, when the measured signal is compressed. Thus, a measured biometric signal is efficiently compressed while reducing a loss of main characteristic information.