User`s guide

Dialogic
®
Host Media Processing Software Release 4.1LIN Release Guide 17
Features
Multimedia conferencing allows a real-time audio/video session between two or more
participants whose call can originate from the IP network or TDM network.
Participants in a multimedia conference can be audio only, video only, or audio and video.
You must apply multimedia transcoding for all participants of a conference; apply audio
transcoding for audio participants and video transcoding for video participants. For more
information on transcoding, see Section 3.1, “New Multimedia (Audio/Video)
Transcoding”, on page 15.
Users decide on the format of the output screen, and select who will be displayed on the
output screen. The number of participants displayed depends on the video layout applied
to the conference. Participants may be persistent or may be determined by the active
talker algorithm based on user selection.
This release supports high definition (HD) voice conferencing, also called wideband audio
conferencing, using G.722 and G.722.2 (AMR-WB) audio codecs. The conference can
consist of a combination of wideband and narrowband parties. In order to achieve
wideband fidelity audio, wideband audio codecs for HD voice conferencing.
Multimedia conferencing is implemented in the Dialogic
®
Conferencing (CNF) API library
and video layout is created using the Dialogic
®
Media Toolkit API library. For more
information, see Section 5.3, “Dialogic
®
Conferencing (CNF) API Library”, on page 36 and
Section 5.1, “New Dialogic® Media Toolkit API Library”, on page 27.
3.3 New Image Overlay
Image overlay is introduced in Dialogic
®
Host Media Processing Software Release
4.1LIN.
The image overlay feature allows you to place an image over a streaming video. You
create a template of the image and define the area on the video screen in which the image
will be displayed.
Image overlay is implemented in the Dialogic
®
Media Toolkit API library. For more
information, see Section 5.1, “New Dialogic® Media Toolkit API Library”, on page 27.
3.4 New MSML Server Software
The Media Server Markup Language (MSML) is supported in Dialogic
®
Host Media
Processing Software Release 4.1LIN.
The Media Server Markup Language (MSML) is an XML-based media resources control
protocol. The MSML media server software has been designed and implemented as an
integral part of the Dialogic
®
HMP Software 4.1LIN.