Browse Prior Art Database

Amortizing Multimedia Annotation Transmission Times Over a Collaborative Session

IP.com Disclosure Number: IPCOM000116140D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Chaiken, RI: AUTHOR [+2]

Abstract

Annotations are sent to a user for viewing only when the user's choice is detected. Otherwise, the user sees a set of logical annotations while the physical files are stored on the annotation owner's machine.

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This is the abbreviated version, containing approximately 60% of the total text.

Amortizing Multimedia Annotation Transmission Times Over a Collaborative
Session

      Annotations are sent to a user for viewing only when the user's
choice is detected.  Otherwise, the user sees a set of logical
annotations while the physical files are stored on the annotation
owner's machine.

      One approach to distributing annotations to new users in a
collaborative session is to send over all annotations.  With large
documents with several pages and several annotations to a page,
especially with audio or video annotations, these cause very long
start-up times, large disk-space usage to store the received files,
and increased network bandwidth requirements during transmission.
These expensive operations could be amortized over the complete
session by providing a new user initially with a logical view and
then transmitting only those annotations selected by a user for
playing, recording, etc.

      All the annotation objects (small squares indicate the presence
of these annotation objects) appear as before in the viewing area.
But
these objects contain only hints as to where the actual audio or
video
data may be found.  With these logical annotations in place, and
without
any file transfers at initialization time, start-up times will
improve
tremendously, less disk space will be used all at once, and the
intensity
of network use will be distributed over the session.

      When a new user joins a collaborative session, the attributes
of all annota...