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HUAWEI VP9050 Executive Video Terminal
User Guide
6 Conference Initiation
Issue 03 (2011-12-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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6.4 Setting Up an H.239 Dual-Stream Conference
During an H.239 dual-stream conference, two independent video stream channels, that is, the
video and the presentation, can be transmitted; furthermore, two channels of video from the
local site can be transmitted or two channels of video from a remote site can be received at the
same time.
If the license on the terminal does not support H.239, the terminal can receive presentation, but cannot
share presentation.
6.4.1 Designating the Dual Streams
Input sources and output destinations for the video and presentation must be chosen.
Choosing Input Sources
If multiple video-source devices are connected to the video input interfaces of the terminal,
you can choose a channel of video as the source of the local video and another channel as the
source of the local presentation.
The priority of the video is higher than that of the presentation, as shown from the following
aspects:
After a conference is initiated, the remote sites view the video of the local site before the
presentation.
During the layout switch in continuous presence mode, the remote sites can always view
the video of the local site.
Choosing Output Destinations
During an H.239 dual-stream conference, if local video and presentation and remote video
and presentation exist simultaneously and if multiple monitors are used at the local site, you
can set the output interfaces for the videos and presentations as required.
6.4.2 Enabling the H.239 Mode
After enabling the H.239 mode, the video and the presentation can be sent simultaneously
during a conference.
For details about how to enable the H.239 mode, see section 6.3 "Setting Conference
Parameters." By default, the H.239 mode is enabled on the terminal.
The H.239 mode supports Presentation and Live.
Presentation: When the video is switched, the presentation remains unchanged. This
mode is used when the presentation carries images, such as slides.
Live: The presentation viewed by each site is switched along with the video. This mode
is used when the presentation carries videos.