TrueConf

# Video communication formats

TrueConf MCU supports various video conferencing formats that you can use depending on the current business task.

# Voice activity detection mode

Voice activity detection mode is a special mechanism that automatically creates an optimal video layout from all the participants who are speaking at the moment.

Voice activity detection can be enabled both during a conference and when a conference is scheduled, but only in the General mode.

To enable/disable this feature, use the buttons /docs/mcu/media/gui/voice_detector_on/en.png and /docs/mcu/media/gui/voice_detector_off/en.png in the conference "header". When this feature is enabled, the focus will automatically shift to the active speaker.

# Conference modes

TrueConf MCU supports the following video conference modes:

# General

This is the default conference mode without restrictions and predefined settings. In this mode, a speaker can be spotlighted manually with the "crown" and automatically.

# Crown

It is possible to mark a participant with the crown during a conference and when scheduling an event.

The crown and voice activity detection mode cannot be used together.

To display a user in the enlarged window, select this person in the list of conference participants and click the button /docs/mcu/media/gui/crown_off/en.png which is next to this person’s name.

/docs/mcu/media/window_with_crown_activated/en.png

If a participant is marked with the crown, this person will be highlighted in the list:

/docs/mcu/media/crown_activated/en.png

# Lecture

Lecture is a mode in which the selected participant (lecturer) is always displayed in the video layout of other participants in a full-screen video window, while the lecturer can see the video windows of all participants.

/docs/mcu/media/lector_for_example/en.png

The lecturer status is not automatically assigned to anyone during a conference. Only the operator can appoint or change the lecturer. To appoint one of the participants as the lecturer, click the /docs/mcu/media/gui/lecturer/en.png button next to the user’s name. This person's frame will be highlighted.

/docs/mcu/media/lecturer_activated/en.png

To fully understand how this mode works, let us consider an example of a student audience:

  1. Lecturer is absent. Until the lecturer is appointed in a conference, all participants can see each other as in a regular student classroom. In this case, VAD is enabled and participants are alternated in the layout automatically.

  2. Lecturer is present. When the lecturer is appointed (or connected to the conference), VAD is disabled while the participants and the speaker will receive the video layout as shown above.

# Presentation

Presentation — in this mode, the speaker is always displayed in a full-screen video window in the attendees’ layout. There can be only one speaker at a time; this person is selected with the help of voice activity detection which is enabled by default and cannot be disabled. Everyone receives assigned layouts if the speaker is absent.

The active speaker is highlighted with the icon /docs/mcu/media/gui/speaker/en.png (speaker) in the list of users:

/docs/mcu/media/ag_activated/en.png

# Switching modes

When conference mode is changed, different settings are applied. If you switch back to the General mode:

This logic applies to both scheduled and active conferences, regardless of whether voice activity tracking is enabled in general mode or not.

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