Lossless video compression method and system for digital KVM switcher having low delay and low complexity

Abstract

The invention discloses a lossless video compression method and system for a digital KVM switcher having low delay and low complexity. The lossless video compression method comprises the following steps of: (1), writing frame-level coding information of a screen video image in a code stream; (2), sequentially inputting RGB data of pixels to be compressed in the screen video image; (3), calculating the prediction mode of the current pixels according to the spatio-temporal correlation; (4), calculating the coding mode of the current pixels according to the prediction mode of the current pixels; (5), writing a compression bit in the code stream according to the coding mode of the current pixels; (6), repeating the steps (2)-(5), such that coding of all the pixels in the screen video image of the current frame is completed; and (7), performing byte alignment filling of the code stream of the current frame, such that coding of the screen video image of the current frame is completed. The method disclosed by the invention is applied to compression of the screen video image of the digital KVM switcher; the compression processing delay and the code stream data volume of the screen video image can be effectively reduced under the limited calculation complexity; and simultaneously, lossless video quality can be kept.

Description

technical field [0001] The invention relates to the field of digital video coding, in particular to a low-latency and low-complexity digital KVM switcher video lossless compression method and system. Background technique [0002] KVM is the abbreviation combination of Keyboard, Display (Video) and Mouse (Mouse). It usually refers to a digital KVM system, including a host computer and a remote digital KVM switch. It is an emerging digital network-based system in recent years. Remote computer centralized management technology. Digital KVM switch provides a modern computer equipment management mode, which only needs a set of keyboard, monitor and mouse of the master computer to control and manage remote computers distributed in multiple locations. KVM technology requires that the keyboard, monitor and mouse can achieve a high degree of synchronization, with high real-time performance and accuracy. The operation delay is small (usually less than 100ms). Accuracy means that the...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing video compression method in the application process of digital KVM switches, such as large video encoding processing delay and high overall computational complexity, the present invention provides a low-delay and low-complexity digital KVM switch video lossless compression The method and system can effectively reduce the video encoding processing delay and the overall computational complexity of the digital KVM switcher, and have high compression efficiency

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