Description
Compare caption line height with a supplied safe-height fraction.
Communication measurements need an explicit event origin, clock correction, count unit and exposure denominator. Timing and coverage records can be summarized without detecting actual speech, verifying message delivery or determining readability, accessibility or communication quality.
Compare caption line height with a supplied safe-height fraction.
When to use this tool
Use Caption Safe Area Line Height Term when checking the stated communication timing, rate, representation or coverage convention.
How to use the tool and how it works
- Enter frameHeight, safeFraction, lineHeight, lines. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read safeHeight, usedHeight, remaining. Use the output convention below.
Compare caption line height with a supplied safe-height fraction. Require frameHeight/lineHeight >= 0, safeFraction in [0,1] and whole lines >= 0; safeHeight = frame*fraction, usedHeight = lines*lineHeight, remaining = safe-used.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| frameHeight | Frame Height | Required. Finite number; minimum 0. |
| safeFraction | Safe Fraction | Required. Finite number; minimum 0; maximum 1. |
| lineHeight | Line Height | Required. Finite number; minimum 0. |
| lines | Lines | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| safeHeight | Safe Height | Required. Finite number. |
| usedHeight | Used Height | Required. Finite number. |
| remaining | Budget minus use under the stated direction, retaining negative deficits where allowed. | Required. Finite number. |
{
"input": {
"frameHeight": 1080,
"safeFraction": 0.8,
"lineHeight": 48,
"lines": 2
},
"output": {
"safeHeight": 864,
"usedHeight": 96,
"remaining": 768
}
}Limitations and assumptions
- All heights share units; the fraction is supplied, not a verified platform safe area, accessibility standard or layout result.
- 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
Use actual synchronized media/message records, appropriate text measurement and user evaluation for complete communication or accessibility assessment.
References
Similar or alternative tools
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