| 摘要 |
PROBLEM TO BE SOLVED: To allow a server device of a SBC system to display a large amount of data such as Web pages with good response while suppressing a load on the entire system when the data is continuously scroll-displayed.SOLUTION: During continuous screen scroll determined with an unchanged region Gk in screen drawing data as an object by repeating a copy command, drawing data Gnew of a rectangular region corresponding to scroll width Ds is compressed to a data amount (low quality) with (high compression) only when a transmission delay is small, and the drawing data is transmitted to a client device in real time in an (Eager Update mode) to be displayed and updated. After the continuous screen scroll is finished, a time when a transmission delay is small, a screen transmission reservation number is small, and no input event from a client exists is determined, transmitted drawing data Gnew that is highly compressed is compressed with (normal compression) (high quality), reduced in a (Lazy Update mode) and retransmitted to the client device to be displayed in high quality and updated. |
