Patent ID: 7734824

Claim:
A system including a server and a client, comprising: the client including a first sending device to send a viewport request to the server to request an image object, a first receiving device to receive an image object according to the viewport request, and a display device to display the image object received by the first receiving device; and the server including a first storage device to store a JPEG2000 codestream, a second storage device to store information on tile-parts corresponding to a tile and a bit, the tile comprises the JPEG2000 codestream and the bit represents whether the server has already sent the tile to the client, a second receiving device to receive the viewport request from the client, a specifying device to specify a tile of JPEG2000 codestream based on the information regarding tile-parts, wherein the tile is specified by the viewport request received by the second receiving device, an extracting device to extract a tile which has not been sent to the client yet in the JPEG2000 code stream specified by the specifying device, a decoder to create an image object by decompressing the tile, and a second sending device to send a image object created by the decoder to the client as a response of the viewport request.