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Shared WhiteBoard Approach to Multimedia Document Annotations

IP.com Disclosure Number: IPCOM000116438D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Chaiken, RI: AUTHOR [+2]

Abstract

A shared annotation system for distributed document viewing is described. Multimedia annotations may be exchanged, modified, relocated, and deleted with these actions mimicked on every user's screen.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 96% of the total text.

Shared WhiteBoard Approach to Multimedia Document Annotations

      A shared annotation system for distributed document viewing is
described.  Multimedia annotations may be exchanged, modified,
relocated, and deleted with these actions mimicked on every user's
screen.

      A shared whiteboard reflects all the work of the users
operating on it.  A shared annotation system permits users to
"commit" their annotations to the network for other users in the
collaborative session to work on.  Hence, a committed annotation it
is in the public domain.  These annotations may be relocated on the
page or in the document, modified, deleted and re-committed to the
network.  If the annotation is moved (using the mouse) by one user,
the move is mimicked on the screens of all the users in the session.
Similarly, if the annotation is modified or deleted, the changes may
be immediately transmitted to all users in the session.  Therefore,
at any time, all the users in the session have exact copies of all
common annotations.

      Annotation modifications are mimicked across displays by
recording any changes to the location or content and transmitting it
across the network to all the users in the group.  Each annotation
has a unique document page number, owner-name and ID combination
which is used to register it once it reaches its recipients.  All
further changes are indexed by this page-number/owner/ID combination.

Annotation location is not used as an identifier since ...