Where ICT is a non-web document that contains synchronized media with captions, the captions should not obscure relevant information in the synchronized media.

Rationale

The European standard contains a requirement that the position of captions not cover any meaningful information on the multimedia content. This requirement only applies to non-web documents. More information is forthcoming.

Refer to Requirement 10.2.39: Caption positioning for more information (external link to EN 301 549 toolkit).

Note: The IBM compliance reporting system will be able to convey compliance status with European EN 301 549/Mandate 376: Accessibility requirements suitable for public procurement of ICT products and services in Europe. Section 508 Refresh checkpoints cover most of the EN 301 549 requirements. However, this is one of several additional checkpoints that will need to be completed to fully report compliance with the European standard.

Development Techniques

Note: Review the General techniques as well as other tabs applicable to your technology.  Prioritize the use of technology-specific techniques, and implement the General techniques as needed. You are always required to find, understand and implement accessible code techniques to meet the checkpoint. The documented techniques and supplements are not exhaustive; they illustrate acceptable ways to achieve the spirit of the checkpoint. If numbered, techniques are in order of preference, with recommended techniques listed first.

General techniques

Any item in this section represents a technique deemed sufficient.

General supplements

Place captions outside content area

Where the media is shot in a different aspect ratio from the viewing area, it may be possible to place the captions in blank or black space outside the content area. This ensures the captions never obscure any important information in the content.

Reposition captions to avoid covering up important visual information

The following guidance is culled from the CBC Captioning Style Guide.

Captions generally appear centred at the bottom of the screen. You should re-position a caption in order to avoid covering up important visual information such as on screen text, graphics, a person's mouth, eyes, etc. Captions should always be one or two lines in length. Three line captions are acceptable when time or space is limited.

Mobile Native (iOS) techniques

There are no specific Mobile Native techniques for this checkpoint. Refer to the General techniques section.

Eclipse techniques

There are no specific Eclipse techniques for this checkpoint. Refer to the General techniques section.

Windows-based (MSAA+IA2) techniques

There are no specific Windows-based (MSAA+IA2) techniques for this checkpoint. Refer to the General techniques section.


Most links in this checklist reside outside ibm.com at the Web Content Accessibility Guidelines (WCAG) 2.0. W3C Recommendation 11 December 2008: http://www.w3.org/TR/WCAG20/

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