基于FPGA的非压缩高清视频光纤传输关键问题研究

Research on Key Issues of Uncompressed HD Video Optical Fiber Transmission Based on FPGA

针对基于FPGA的非压缩高清视频光纤传输中的带宽约束要求、同步及格式恢复等关键问题,本文提出了一种高效解决方法。其一在满足视频数据总体所需带宽的前提情况下,给出相应的约束条件及调度方法,并采用轮询及竞争混合及FPGA内部建立输入/输出cache的方式,提高了SDRAM的带宽利用率。其二为建立帧同步码机制,对输入的视频数据进行格式编码,设置同步码,采取定时清零非同步数据的方式,解决视频传输过程中各种断路情况,并能自动恢复视频输入格式,提高了视频传输的稳定性。最后为验证方法的可行性,基于Xilinx公司的Spartan6系列中的XC6SLX45器件,设计了实物,采用了ChipScope工具验证了逻辑时序,得到了光纤传输高清视频格式为1920×1080P@60Hz的显示结果。

Considering the bandwidth constraint requirements,synchronization and format recovery in FPGA-based uncompressed HD video fiber transmission,this paper proposes an efficient solution. Firstly,under the premise of satisfying the overall bandwidth required for video data,the corresponding constraints and scheduling methods are given,and the bandwidth utilization of SDRAM is improved by using polling and competition mixing and establishing input/output cache inside the FPGA. The second is to establish a frame synchronization code mechanism,format the input video data,set the synchronization code and adopt the method of regularly clearing the asynchronous data,which can solve various disconnection situations during the video transmission process,automatically recover the video input formatand improve the stability of video transmission. Finally,to verify the feasibility of the method,based on the XC6 SLX45 device in Xilinx’s Spartan6 series,the physical object was designed. The Chip Scope tool was used to verify the logic timing,and the display result of the optical transmission HD video format was 1920 × 1080 P@ 60 Hz.