Description
Convert a supplied swallowing-event video frame to time.
ENT records use explicit laterality, event markers, sampling clocks, collection volumes and anatomical/source labels. A rate or point resistance needs compatible units, while video timing depends on frame-rate assumptions. These local measurements and records do not detect a clinical event, assess airway function or choose treatment.
Convert a supplied swallowing-event video frame to time.
When to use this tool
Use Swallowing Event Frame Index when you already have zeroBasedFrame, frameRateHz, startOffsetSeconds and need to convert a supplied swallowing-event video frame to time.
How to use the tool and how it works
- Enter zeroBasedFrame, frameRateHz, startOffsetSeconds. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read eventSeconds. Use the output convention below.
Require nonnegative safe whole zeroBasedFrame and frameRateHz>0; return startOffsetSeconds+frame/frameRate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| zeroBasedFrame | Zero Based Frame | Required. Safe integer; minimum 0. |
| frameRateHz | Frame Rate Hz | Required. Finite number; strictly above 0. |
| startOffsetSeconds | Start Offset Seconds | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| eventSeconds | Event Seconds | Required. Finite number. |
{
"input": {
"zeroBasedFrame": 75,
"frameRateHz": 25,
"startOffsetSeconds": 2
},
"output": {
"eventSeconds": 5
}
}Limitations and assumptions
- Assumes constant frame rate; no swallowing event, aspiration, timing validity or clinical safety is assessed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the original signal, collection protocol and video acquisition timing for the actual measurement. Preserve supplied side and site sources; a local volume/time rate, frame offset or point ratio does not replace a complete functional assessment.
References
Similar or alternative tools
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