Subtitles and Caption Subtitles and Caption 5

Question 1

According to WCAG 2.1, which success criterion requires captions for all pre-recorded audio content in synchronized media?

Accepted Answer

Success Criterion 1.2.2 (Captions – Pre-recorded)

Answer

WCAG 2.1 Success Criterion 1.2.2 specifically requires captions for all pre-recorded audio in synchronized media at Level A conformance.

Question 2

What is a 'caption encoder' device used for in television broadcasting?

Accepted Answer

Inserting caption data into the video signal's vertical blanking interval or digital stream

Answer

A caption encoder inserts the caption data stream into the appropriate location of the video signal (VBI for analog, or digital packets for digital TV) for broadcast.

Question 3

Which display style is most commonly used for live captions such as news broadcasts?

Accepted Answer

Roll-up

Answer

Roll-up captions scroll upward line by line and are the preferred style for live broadcasts because they allow continuous display as words are transcribed in real time.

Question 4

In the Netflix Timed Text Style Guide, what is the recommended maximum reading speed for subtitles?

Accepted Answer

17 characters per second

Answer

Netflix's Timed Text Style Guide specifies a maximum reading speed of 17 characters per second (cps) for English subtitles to ensure comfortable readability.

Question 5

What is 'line 21' in the context of analog television closed captioning in the US?

Accepted Answer

The specific line in the vertical blanking interval where caption data is encoded for analog NTSC broadcasts

Answer

Line 21 refers to the 21st scan line of the vertical blanking interval in the NTSC analog TV signal, where closed caption data is encoded per EIA-608 standard.

Subtitles and Caption Practice Test

Subtitles and Caption Practice Test

Subtitles and Caption Subtitles and Caption 5