Collaborative screen sharing system

摘要

This invention discloses a novel collaborative screen sharing system. In the invented method for collaborative screen sharing, updates to a previously displayed screen are transmitted from a local computer to a remote computer for display. At the local computer, the updates are divided into unit blocks circulated by rigid lines and compared with screen displays stored in the cache memory of the local computer and the remote computer. In transmitting the updates, only identities of unit blocks with screen display identical to screen displays previously stored are transmitted. For unit blocks with screen display not identical to any screen display previously stored, identities and screen display information of the unit blocks are transmitted. Images and unit blocks stored in the local computer and the remote computer are maintained identical and are updated simultaneously.