Described Video (DV) / Audio Description (AD)
UC-DV-1: Indicate the existence of descriptions and state
Extends
Nothing
Description
The UI will allow for users, who consume descriptions, to quickly identify the availability of descriptions. The UI must allow for change of state (on/off), dependent on user preference.
Actors
- Cloud browser client
Dependencies
none
Gaps
Notes
UC-DV-2: Render descriptions in time-synchronized manner
Extends
Nothing
Description
Descriptions must play in a manner that synchronizes as intended with the primary media resource.
Actors
- Cloud browser client
Dependencies
none
Gaps
Notes
UC-DV-3: Support multiple description tracks
Extends
Nothing
Description
The system will allow for inclusion of multiple description tracks as required.
Actors
- Cloud browser client
Dependencies
none
Gaps
Notes
This facilitates the use of multiple different descriptions tracks containing various levels of detail or description tracks containing different languages.
UC-DV-4: Enable selection of multiple description tracks
Extends
Nothing
Description
UI must accommodate the switching of available description tracks based on user preference.
Actors
- Cloud browser client
Dependencies
none
Gaps
Notes
Ideally, this UI control remains hidden until required (availability of multiple tracks).
UC-DV-5: Granular volume control
Extends
Nothing
Description
The UI will provide separate user controls to increase / decrease volume of individual audio tracks
Actors
- Cloud browser client
Dependencies
none
Gaps
Notes
A bad audio mix can limit the effectiveness of each audio track. Providing granular volume controls improves the success rate of the user consuming the content.
UC-DV-6: User controlled volume increments
Extends
Nothing
Description
Enable smooth changes in volume without incremental steps in volume. Users should be able to configure their preferences in this regard and have them applied globally
Actors
- Cloud browser client
Dependencies
none