DIN EN 62944:2018 pdf free.Audio, video and multimedia systems and equipment—Digital television accessibility—Functional specifications(IEC 62944:2016).
Many deaf and some severely hard of hearing people use sign language as their first language, especially where the hearing loss was acquired at birth or shortly thereafter. Sign language is a visual medium and many sign languages are distinct languages, not just gesture versions of the local spoken language. For these users, sign language may be provided in the form of an in-vision sign language interpreter. As this form of delivering the sign language within the main video stream is non-elective (usually referred to as open signing), there is no further support required from the receiver for rendering open signing.
Some on-demand systems will allow users to select an alternative content asset which has open signing in the video track as opposed to the default asset for the same content.
Where available, digital television solutions should ensure that at least one method exists to allow viewers to find and select such content. Examples of such methods are: searching and/or filtering the electronic programme guide by references to signed content; allowing users to reorder and/or filter channels in lists and/or programme guides so they can make channels with substantial signed content more prominently visible; use of a HbbTV application that redirects to signed content and/or programme versions. This is not an exhaustive list. Such functionality might need metadata handling to display an appropriate text message and/or symbol in content guides/browsers.
Lack of consistency (including inconsistent terminology) between the user interface and other components frequently confuse users. For example, confusion is likely if an on-screen hint instructs the user to press the return button to go back, yet the remote control the button carries only the ‘‘ symbol. Similarly, if it is not clear to users where in the menu they currently are or which current settings have been activated, this leads to confusion and frustration.
Most receivers provide menu based navigation for at least some operations. Menus may indicate the current position or selection in a menu clearly and unambiguously on screen and this may also be indicated in audible format. Where submenus or additional menu pages exist, this may be indicated visually, with a clear indication of where exactly in the hierarchy the current position is located. Receivers should provide visual feedback when pressing a remote control button.DIN EN 62944 pdf download.