6.5: Video Communication
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Clause 6.5 (Video communications) provides performance requirements that support users who communicate using sign language and lip-reading. For these users, good usability is achieved with Common Intermediate Format (CIF) resolution, a frame rate of 20 frames per second and over, with a time difference between speech audio and video that does not exceed 100 ms.
Where ICT that provides two-way voice communication includes real time video functionality, the ICT:
a) shall support at least QCIF resolution;
b) should preferably support at least CIF resolution.
Where ICT that provides two-way voice communication includes real-time video functionality, the ICT:
a) shall support a frame rate of at least 12 frames per second (FPS);
b) should preferably support a frame rate of at least 20 frames per second (FPS) with or without sign language in the video stream.
Where ICT that provides two-way voice communication includes real-time video functionality, the ICT should ensure a maximum time difference of 100 ms between the speech and video presented to the user.