Patent ID: 7702171

Claim:
A screen data transmitting apparatus for compressing image data of at least a region of a display image and transmitting compressed image data to a screen display terminal, the region of a display image including at least one of a plurality of classes of graphical user interface (GUI) components, comprising: a storage device configured to store compression properties information for the classes of the GUI components, the compression properties information indicating at least a compression scheme having a highest compression ratio among compression ratios of suitable compression schemes for each of the classes of the GUI components; a determination device configured to determine compression properties information for a class of the GUI components of the image data, based on the compression properties information stored in the storage device; a compression device configured to compress the image data according to the determined compression properties information, thereby generating transmission data; and a transmitting device configured to transmit the transmission data to the screen display terminal, wherein the storage device updates the compression properties information in every constant time interval or if contents of an image that corresponds to the image data are changed, and the storage device stores compression properties information further indicating, for each of the classes of GUI components, a first set of average compression ratios for compression schemes and a second set of average compression processing time per unit for the first set of compression schemes.