Signal Quality
What is Signal Quality?
Signal Quality is a measurement or an indicator of the quality of the extracted signals. It provides an insight into the quality of the vital sign measurements.
How to retrieve Signal Quality from Vitals™ SDK?
ItemItem | DescriptionDescription |
|---|---|
| Supported by Server Version(s) | NyanCat (V1 Backend)CrimsonLion (V2 Backend) |
| User Info Required | No extra data is required. |
| Vitals™ SDK API | Please use the healthResult.health.scanParameters.signalQuality variable provided by the callback function onVideoFrameProcessed. |
| API Reference | Health, ScanParameters |
What does it mean to have high Signal Quality?
A high Signal Quality indicates that the signals captured by Vitals™ SDK are strong, resulting in more accurate and consistent measurements. A high signal quality ensures the reliability of the vital signs provided by Vitals™.
What does it mean to have low Signal Quality?
A low Signal Quality suggests that the signals captured by Vitals™ SDK are weak. Please follow VHA Best Practices (for user guidelines) and Conditions Check (for developer guidelines) for optimal results.
How does Vitals™ SDK measure it?
Some of the factors that influence the Signal Quality are listed below:
- Average frame rate
- Minimum frame rate
- Signal-to-Noise Ratio (SNR)
- Raw signal variations
- Physiological vital sign variations
Unit of Measurement: N/A
Range
ValueValue | Quantitative InterpretationQuantitative Interpretation |
|---|---|
| ≥ 60 | Normal |
| < 60 | Poor Signal Quality |
The output range is [0, 100].