Abstract: A method for real-time monitoring image transmission. First, the frame is divided into a plurality of sub-blocks and numbered in order. Then, a sub-block with variation is designated as a start sub-block, and sub-blocks adjacent to the start sub-block are searched and the sub-blocks with variation are grouped to generate at least one variant sub-block set, in which the variant sub-blocks in the set are connected to each other and form a rectangle. Thereafter, the compressed variant sub-block set and the corresponding numbers of each variant sub-block in the set are transmitted to the server. Afterward, the server replaces corresponding sub-blocks having the same numbers in an original frame with the received variant sub-blocks.

Abstract: The present invention disclosed a system and method for transmitting multi-channel signals. With this system and method, each user can watch all available DTV channels without an exclusive antenna and tuner. The UDP port numbers are applied as the virtual channels to be selected by users, and decreasing the number of required antennas and tuners also decrease cost. The system comprises a plurality of audio/video sources for providing audio/video content and a server. A hub is coupled to the server, and a plurality of display units is coupled to the hub, whereas each of the display units receives the audio/video signals and displays the audio/video content from at least one of the audio/video sources.

Abstract: A method for network security management using an Internet key exchange mechanism. A user database is established at a server comprising a plurality of first usernames and a plurality of corresponding first passwords. A second username and corresponding password are embedded into a shared key. A client key value is derived according to the shared key and Internet key exchange mechanism. The first user-names and corresponding first passwords are calculated and obtained for generating a plurality of user key values. The client key value is added into a first message and transferring the first message to the server.

Abstract: A method for real-time monitoring image transmission. First, the frame is divided into a plurality of sub-blocks and numbered in order. Then, a sub-block with variation is designated as a start sub-block, and sub-blocks adjacent to the start sub-block are searched and the sub-blocks with variation are grouped to generate at least one variant sub-block set, in which the variant sub-blocks in the set are connected to each other and form a rectangle. Thereafter, the compressed variant sub-block set and the corresponding numbers of each variant sub-block in the set are transmitted to the server. Afterward, the server replaces corresponding sub-blocks having the same numbers in an original frame with the received variant sub-blocks.

Abstract: A system for real time image transmission monitoring for use in a network system connecting a server and a client. The system includes a remote image monitoring system having a VGA signal-gathering module to gather first and second frames from a client, and a VGA signal-gathering module. The VGA signal-gathering module defines each frame into a plurality of sub-frames, and numbers each sub-frame. Then, the contents of the sub-frames with the same number in the first and second frames are compared, and the content of the variation sub-frame in the second frame and its corresponding number are output to the server if the contents are different. The server replaces the content of the sub-frame with the number in the first frame by the received content, and thus forms the second frame to output.