Browse Prior Art Database

Control of Video Telephony from a Data Conferencing System

IP.com Disclosure Number: IPCOM000113884D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 6 page(s) / 203K

Publishing Venue

IBM

Related People

Niblett, PD: AUTHOR [+2]

Abstract

The IBM Person to Person computer supported collaborative working products provide a number of data-oriented collaboration utilities (Chalkboard, Shared Clipboard etc.), but have only limited video support.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 26% of the total text.

Control of Video Telephony from a Data Conferencing System

      The IBM Person to Person computer supported collaborative
working products provide a number of data-oriented collaboration
utilities (Chalkboard, Shared Clipboard etc.), but have only limited
video support.

      There are now quite a number of video codecs available supplied
with their own point-to-point video conferencing software.  These
codecs may communicate via physical or logical communications
channels not currently supported by Person-to-Person (for example
analog cabling or Isochronous Ethernet).

      This invention describes a way of integrating these video
codecs with Person to Person to achieve the following:
  o  Automatic establishment and termination of a video call
     within a Person to Person data conferencing call (which may
     be a multi-party call).
  o  Video communications and Person to Person able to use
     independent communications channels if required.
  o  No change to Person to Person software.
  o  Minimal alterations to video conferencing application.

      When someone makes a Person-to-Person (P2P) call, P2P
establishes a data communication link between the two or more parties
in that call.  This link can be used as a mechanism to coordinate
video communications between the parties in a simple manner by
providing a new P2P-aware applet.  This applet is launched by P2P at
the workstations that wish to participate in video communications,
and its purpose is to control the operation of the non-P2P video
application.  As the applet need have no user interface of its own it
is referred to here as a "Video Daemon".

      By giving the Video Daemon the same name as the standard P2P
video application we can avoid the need for any changes to Person to
Person.

      System Description - The objective of the disclosure is to show
an integrated video conference between 2 or more participants using
isochronous Ethernet adapters.  Person-to-Person (P2P) will provide
data-oriented conference support (such as chalkboard and shared
clipboard) using the conventional Ethernet capabilities, while
applications supplied with the Codecs will use the Isochronous
capabilities to provide video and audio conferencing.

      It is highly desirable that there should be a single method of
call establishment and control that covers both the video and the
data oriented parts of the demonstration.  It is also important to
minimise changes to P2P and to the video applications.

      The proposal is to leave the P2P data utilities and
communications stack unchanged, and to add a Video Daemon application
which will act as the link between P2P and the real Video
application.  This Video daemon will pretend to be the P2P Video
application.

A simplified block structure looks like this:
  P2P Address book ----> Video Daemon  <--->  Video Application
         |                /      ...