Method for improving display quality of virtual desktop by jointly using RFB coding and H.264 coding in cloud computing environment
A technology of cloud computing environment and coding method, which is applied in the field of cloud computing environment to improve the display quality of virtual desktop by mixed use of RFB and H.264 coding, which can solve the problem of fuzzy color tone at the edge of strokes, easy fatigue of eyes, unsuitable for watching movies and TV, etc. problems, to achieve the effect of improved display quality
Inactive Publication Date: 2014-04-09
杭州龙境科技有限公司
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Problems solved by technology
The distortion of text clarity is mainly due to: the edges of the strokes of large fonts become blurred and often accompanied by distortion of tone, while the strokes of small fonts generally have distortion of tone, which makes readers' eyes easy to fatigue
On some graphs that are represented by curves, such as stock charts, this tonal distortion is particularly noticeable and unpleasant
[0011] Therefore, the advantages and disadvantages of these two methods are mutually exclusive and complementary. RFB is suitable for reading text charts but not for watching movies and TV, while H.264 is suitable for watching movies and TV but not for reading text charts
The current virtual terminal and virtual desktop products are either one or the other. Most of them use RFB technology, and some use H.264 technology. , and sometimes office applications
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[0042] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0043] Adopt the virtual desktop software of RFB and adopt the video playing software of H.264 to have many at present, adopt open-source software VNC and Ffmpeg here as the implementation example of the method of the present invention.
[0044] VNC means "Virtual Network Computing (Virtual Network Computing)", which is actually the meaning of virtual desktop, which uses RFB codec. Since the RFB codec is relatively simple, it is generally implemented by software. There are many versions of VNC with slightly different implementations, such as TigerVNC, TightVNC, UltraVNC, etc. The basic VNC version is used here. The basic VNC is divided into two versions: Unix / Linux and Windows, and vnc-4_1_3-unixsrc is used here.
[0045] Ffmpeg is actually a video playback system framework, which can adopt many different encoding / decoding schemes. The specific encoder / deco...
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The invention relates to a method for improving the display quality of a virtual desktop by jointly using RFB coding and H.264 coding in a cloud computing environment. A server is provided with an RFB coder and an H.264 coder which achieve the RFB coding method and the H.264 coding method respectively. A client is provided with an RFB decoder and an H.264 decoder which achieve the RFB decoding method and the H.264 decoding method respectively. Which coding method is adopted for a current frame is dynamically determined by the server according to a set rule, the decoding method for the current frame is determined by the client according to a sign in a received IP packet, the two modes are dynamically switched by jointly using the RFB coding and the H.264 coding according to the update rate of the displayed content, and thus the display quality and the display effect of a screen can be obviously improved. The method has the advantages that a user of the virtual desktop in the cloud computing environment can obtain satisfied effect when doing office work or playing high-definition video just like on a real desktop system.
Description
technical field [0001] The present invention relates to the field of cloud computing applications, in particular to a method for improving the display quality of virtual desktops by mixing RFB and H.264 encoding in a cloud computing environment. Its notable feature is that the server dynamically switches between using RFB or The H.264 encoding scheme streams the screen content to the client to improve the screen display quality of the client's virtual desktop. Background technique [0002] Virtual desktop is an application of cloud computing, and its characteristic is that the application program runs on the server, but the screen display is on the remote client machine. [0003] In computer technology, the content displayed on the screen comes from a "frame buffer (Frame Buffer)", which can also be called "picture buffer", abbreviated as FB. The program running on the computer writes the content to be displayed into the frame buffer, and the display displays the content of...
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IPC IPC(8): H04L29/06H04L29/08G06F9/455
Inventor 毛德操陈侃郑霄金涛
Owner 杭州龙境科技有限公司