US 6,332,147 B1Granted

Computer controlled display system using a graphical replay device to control playback of temporal data representing collaborative activities

AssigneeXerox Corporation

InventorsThomas P. Moran, William J. van Melle, Gordon P. Kurtenbach, Patrick Chiu

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Abstract

A system for controlling the playback of a recorded session utilizing a window acting as a player for playing back a timestream for a shared representation media, such as an electronic whiteboard. Timestream and event information for the session is captured by one or more recording devices. Playback of a session is performed under the control of a session access device which utilizes event information to create a user interface for controlling session replay. The user interface includes the window for playing back the timestream of a shared representation media. Each graphical object in the window is associated with one or more events (e.g. a creation event, an editing event, a move event or a deletion event). Selection of a graphical object enables playback time to be moved to the time for one of the associated events. Selection may also be made on an area of the window. This will enable the user to view all events related to graphical objects in the selected area (as some graphical objects may be erased or moved).

Claims14

Dependent claims

A computer controlled display system for controlling the replay of a session captured on a plurality of media capture devices, wherein at last one of said plurality of media capture devices is a shared representation media, said shared representation media for creating and displaying graphical objects responsive to a user input, said computer controlled display system coupled to one or more players for replaying said session, said computer controlled display system comprising:

display
session input means for receiving temporal data of said captured session, said temporal data comprising timestreams and events;
user input means for enabling a user to interact with said computer controlled display system;
synchronization means for synchronizing playback of said session by said one or more players;
processing circuitry for generating display information from a timestream representing operations performed on said shared representation media, said display information for display in a window on said display, said window operating as a player for replaying the temporal sequence of operations performed on said shared representation media, said replay causing one or more graphical objects created by a user of said shared representation media during said session capture to be displayed in said window, and said window further operating as a user interface for controlling the playback of said session;
window control circuitry for detecting a user interaction on at least one of said one or more graphical objects presented during replay in said window, and user interaction causing replay of the temporal sequence of operations on said shared representation media to move to a new point in said temporal sequence of operations.

3 more elements

In a computer controlled display system for controlling playback of a session, a method for changing the playback time of said session, said session captured on a plurality of media capture devices, wherein at least one of said plurality of media capture devices in a shared representation media, and shared representation media for creating and displaying graphical objects responsive to a user input, said method comprising the steps of:

a) analyzing a timestream of said shared representation media to identify a plurality of events, each of said plurality of events corresponding to an object created on the shared representation media during said session, each of said events having a corresponding a point in time in said session;
b) replaying said timestream of said shared representation media in a replay window on a display coupled to said computer controlled display system;
c) detecting that a user has selected a graphical object in said replay window presented during replay of said timestream of said shared representation media, said graphical object representing a marking made on said shared representation media during said session capture;
d) identifying events associated with said graphical object;
e) determining which of said events will be used to move playback time to;
and
f) cuing players to move playback of said session to the time associated with said event determined in step e).

4 more elements

Dependencies are inferred from the claim text.