Description
Compare caption visibility duration with a supplied requirement.
Accessibility-related records can describe visible time, available formats, label text or supplied requirements. A count or budget can expose local gaps without establishing usable content, valid accommodations or compliance with a standard.
Compare caption visibility duration with a supplied requirement.
When to use this tool
Use Caption Visible Duration Gap when checking an explicit accessibility record, time or layout convention.
How to use the tool and how it works
- Enter visibleDuration, requiredDuration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read gap. Use the output convention below.
Compare caption visibility duration with a supplied requirement. Require both durations >= 0; gap = visibleDuration-requiredDuration on one time basis.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| visibleDuration | Visible Duration | Required. Finite number; minimum 0. |
| requiredDuration | Required Duration | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| gap | Gap | Required. Finite number. |
{
"input": {
"visibleDuration": 4,
"requiredDuration": 3
},
"output": {
"gap": 1
}
}Limitations and assumptions
- The requirement is supplied, not a captioning standard; readability and synchronization are not 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
Use the applicable accessibility guidance, real content and user evaluation for practical adequacy; establish any legal requirement separately.
References
Similar or alternative tools
- Caption Overlap Duration
Return overlap and union duration of two caption intervals.
- Access Request Response Delay
Return elapsed and pause-adjusted access-request response time.