US 7,559,031 B2
Video display apparatus, video composition delivery apparatus, and system
Takuya Kawamura, Kawasaki (Japan); Naohisa Shibuya, Kawasaki (Japan); and Nobuhiko Sugasawa, Kawasaki (Japan)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan)
Filed on Jan. 20, 2006, as Appl. No. 11/335,823.
Claims priority of application No. 2005-015929 (JP), filed on Jan. 24, 2005.
Prior Publication US 2006/0170763 A1, Aug. 03, 2006
Int. Cl. G06F 3/00 (2006.01)
U.S. Cl. 715—753  [715/722; 715/756; 348/14.08; 348/14.09; 709/204; 709/205; 370/260] 16 Claims
OG exemplary drawing
 
14. A video delivery system comprising a video composition delivery apparatus configured to generate a composite video image from video sources and a video display apparatus configured to receive the composite video image from the video composition delivery apparatus to display the received composite video image:
the video display apparatus including:
a receiving unit configured to receive the composite video image from the video composition delivery apparatus,
a display unit configured to display the received composite video image,
an area manager configured to store area information pieces,
a position specification unit configured to specify a position on the composite video image displayed by the display unit,
an area selection unit configured to select an area information piece indicating an area including the position specified by the position specification unit from the area information pieces stored in the area manager,
an area display unit configured to provide information indicating the area represented by the area information piece selected by the area selection unit to the display unit so as to superpose the information on the displayed composite video image,
an area change unit configured to change the information provided by the area display unit,
an area information update unit configured to update the area information piece selected by the area selection unit according to the information obtained after the change, and
a control signal transmission unit configured to generate an update control signal containing the area information piece after update and a first identifier identifying the area information piece after update, and configured to transmit the update control signal to the video composition delivery apparatus,
the video composition delivery apparatus including:
a video source receiving unit configured to receive video sources,
a layout information manager configured to manage layout information pieces including a second identifier identifying a respective video source, the layout information piece indicating the layout of an image represented by the respective video source on the composite video image,
a composite video generation unit configured to generate the composite video image from the video sources received by the video source receiving unit, by using the layout information pieces,
a transmitting unit configured to transmit the generated composite video image to the video display apparatus,
a control signal receiving unit configured to receive the update control signal from the video display apparatus,
a video manager configured to manage a corresponding relation between the second identifier of a video source and the first identifier, and
a layout information update unit configured to update the layout information piece of a video source associated with the first according to the area information piece contained in the update control signal.