Screen sharing and synchronous recording method based on IP network

Abstract

Both the system information hooker and the API hooker are setup at same time and the screen image change area is traced. Based on the screen image change area, the changed screen image data are read fro the display card. The screen data are transmitted through two modes: unicast and multicast. The screen data are stored as the local file. The data received from IP network are decoded by using the reversed coding role. The decoded screen image is displayed on the pointed window. The invention makes general PC possible to run instructional software, meantime the screen image through network shared by other desktop can be synchronous recorded and stored as the local file. The invention possesses the features of good image quality, fast speed, easy of implementation and good portability.

Description

technical field [0001] The invention relates to a method for improving screen image processing efficiency based on an IP network, in particular to a screen sharing and synchronous recording method based on an IP network, and belongs to the technical field of image processing. Background technique [0002] At present, the screen sharing technology based on IP network has been widely used. Among them, the screen sharing technology can be classified into the following four types: 1) Use NetMeeting SDK to realize screen sharing. This is a relatively mature screen sharing technology of Microsoft, which shares the desktop or application to other connected systems through unicast. Good running performance, stable and reliable. But there are the following deficiencies: the color of the screen image is not rich enough (256 colors); it does not support multicast sharing, and the number of connections is limited by the bandwidth; the screen operation cannot be saved or played back; c...

AI Technical Summary

Problems solved by technology

But there are the following deficiencies: the color of the screen image is not rich enough (256 colors); it does not support multicast sharing, and the number of connections is limited by the bandwidth; the screen operation cannot be saved or played back; complex MCU technology is required to realize multi-point forwarding and cascading function, not easy to expand

Its disadvantages are: (1), full-screen data is processed every time, the data volume is huge, and high machine configuration is required to quickly process data compression and transmission

(2), reading data from the video memory is fast or slow, and it is almost difficult to run normally on a graphics card that reads data slowly, and the CPU is occupied for a long time, so that other programs run slowly

However, this technology can improve the performance of screen sharing without modifying system hardware resources and administrator privileges, including: good display quality, fast speed, simple implementation, and good portability.

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