Which ITU standard enables multiple video streams within a single videoconference and displays them in separate windows?

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Multiple Choice

Which ITU standard enables multiple video streams within a single videoconference and displays them in separate windows?

This question focuses on how videoconferencing systems handle more than one video stream in a single call. ITU-T's H.239 defines the dual-video capability, allowing a second video stream to be sent alongside the main participant video. This second stream is typically used for content sharing or an alternate view, and it can be displayed in a separate window from the primary video feed, so participants can see both surfaces simultaneously. The other options are an audio codec (G.723, G.711) or an graphics format (GIF) and are not about managing multiple video streams or their display in separate windows.

This question focuses on how videoconferencing systems handle more than one video stream in a single call. ITU-T's H.239 defines the dual-video capability, allowing a second video stream to be sent alongside the main participant video. This second stream is typically used for content sharing or an alternate view, and it can be displayed in a separate window from the primary video feed, so participants can see both surfaces simultaneously. The other options are an audio codec (G.723, G.711) or an graphics format (GIF) and are not about managing multiple video streams or their display in separate windows.

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