Research On Wireless Transmission And Split-screen Technology Of Uhd Video

Aiming at the problem of insufficient frame rate of microwave radio long-distance transmission UHD video stream,a wireless transmission method with high resolution and frame rate is proposed by taking 4K@60Hz video stream as the research object.This method USES heterogeneous multi-core ARM+FPGA architecture and adopts VCU+HEVC codec algorithm to realize high compression and fast codec processing of video stream,effectively solving the problem of insufficient frame rate of UHD video stream.The main research work of this paper is as follows:(1)The fast video codec technology is studied.Heterogeneous multi-core acceleration method is adopted to build the logic unit of video codec with FPGA,which is controlled by carrying Linux system on RAM,and then the encoded data stream is classified and clipped to obtain TS stream finally.The bandwidth problem of 4K@60Hz video stream transmission is solved.(2)The anti-jamming method of wireless transmission of video stream is studied.Microwave radio technology is used as the wireless transmission medium,and OFDM radio frequency technology with strong anti-interference ability and long transmission distance is selected to design the wireless transmission system,which greatly enhances the anti-interference ability.(3)Research video stream decoding,segmentation and reconstruction technology.Through the research of HDMI2.0 interface protocol and physical layer,the input and output design of video stream is completed,and the image data stored in memory is studied.The DECODING of TMDS stream,video format conversion,image segmentation and video stream reorganization are realized,and the image reproduction of the quarter screen is completed.Finally,the Zynq(?)UltraScale+MPSoC programming platform is adopted to realize ultra HD video wireless transmission and quad-screen display.The test results show that the system has a high degree of image restoration for wireless transmission of 4K@60Hz UHD video stream.On the output side,the quarter-screen display is consistent with the screen.