Research Of High-speed Video Buffering And Display Control Module In Three-dimensional Laparoscopic Imaging System

Endoscopic surgery is one of the mainstream directions of medical development in the future. Laparoscopic system is the key equipment of endoscopic surgery. Compared with the traditional two-dimensional laparoscopic system,3D laparoscope can provide3D images, which will make doctors implement the operation more accurately and improve the success rate of surgery.3D laparoscopic equipment consists of optical system and video system. The thesis focuses on the realization of high-speed video buffering and display control module based on FPGA in video system.Firstly, the thesis introduces the research significance and status of3D laparoscopic system at home and abroad. The general standard of video is briefly presented. Then the demands for project are analyzed and solutions are put forward.Secondly, the thesis introduces the structure of the three-dimensional laparoscope imaging system framework. The video buffering, display and control module are stated in detail. Video buffering module processes two-channel high-speed video streaming. Video display module completes the3D display of two-channel video data. Control module realizes the configuration of system’s working mode.Thirdly, timing analysis will be implemented through the FPGA’s module. The thesis introduces timing constraint principle and timing analysis method for high-speed signal, which is verified with simulation tools.Finally, the experimental results show that the proposed three-dimensional imaging systems can achieve the effect of real-time high-definition imaging. The display resolution is720p/60Hz in3D mode. This system can be extended to1080p/60Hz or even4K of3D video system due to the flexibility and instantaneity of FPGA.