Browse Prior Art Database

Automatic Cueing of Video Conferencing Cameras by Sound

IP.com Disclosure Number: IPCOM000109781D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 45K

Publishing Venue

IBM

Related People

Garrett, MJ: AUTHOR

Abstract

Proposed is a method to allow participants in a video conference call to view the local outgoing image as well as that of the remote participant currently speaking. Cueing (selection of incoming/outgoing video stream) is triggered by audio input from participants. The scheme allows periodic local awareness while viewing remote images. Switching is automatic, providing a natural source of video in multi-way links.

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Automatic Cueing of Video Conferencing Cameras by Sound

       Proposed is a method to allow participants in a video
conference call to view the local outgoing image as well as that of
the remote participant currently speaking.  Cueing (selection of
incoming/outgoing video stream) is triggered by audio input from
participants.  The scheme allows periodic local awareness while
viewing remote images.  Switching is automatic, providing a natural
source of video in multi-way links.

      When making a video call on a conferencing system, it is
customary to set up the local camera in terms of focus, brightness
and area being viewed prior to making the call.  After that, the
remote, called person is generally viewed on the local screen, making
it difficult to monitor the local outgoing picture quality.  Any
arbitrary attempts to switch back to the local scene spoils the
natural sequence of the conversation.

      This scheme provides the ability to automatically switch to the
local scene under software control when the local person is talking.
The software can easily detect that voice is being received by its
own computer hardware and cause a switch to its own camera.  This, of
course, can be made operable at both ends of the video link.  The
software is able to filter out spurious short-term noises to avoid
ragged switching and can also, by option, be set to switch to the
local camera on a timed basis without the presence of sound.

      For a multi-wa...