Method and system for application broadcast

Details Method and system for application broadcast Method and system for application broadcast

2002-12-18

2009-11-10

Tung, Kee M (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics display memory system

Reexamination Certificate

active

07616208

ABSTRACT:
Methods and apparatuses are described for application broadcasting. For one embodiment, pixel data being broadcast from a moderator to one or more participants is divided into tiles. Display data is generated for each tile. Each display data segment (segment) contains the pixel data for the tile, and also contains a tile identifier. The segments are periodically evaluated. If the pixel data has changed, the segment is replaced with the most recent segment corresponding to that tile. A time indicator is also included within each segment for each tile indicating the time at which the segment was updated. A participant DPS requests data from the server and provides the time indicator for the last segment it received. The server then transmits the current segment for each tile that has been updated subsequently. This allows presentation at the participant's DPS of the most current version of the moderator's display screen.

REFERENCES:
patent: 4958378 (1990-09-01), Bell
patent: 6199116 (2001-03-01), May et al.
patent: 2003/0058248 (2003-03-01), Hochmuth et al.
patent: 2003/0202575 (2003-10-01), Williams et al.
patent: 2003/0227565 (2003-12-01), Hamilton et al.
patent: 0669764 (1995-08-01), None
patent: WO 01/95617 (2001-12-01), None
PCT International Search Report for PCT International Appln No. CA03/01969, mailed Apr. 26, 2004 (3 pages).

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