High‐Definition Video Fiber Optic Transmission System

In today’s information age, the rapid development of display technology, thevideo display quality requirements higher and higher. we can see a variety ofhandheld devices in the market, and PC display the physical the highest resolution1920*1080HD resolution can be done on these devices, there are some integratedHDMI/DVI high-definition video output interface. HD video in17-inch1920*1080physical resolution on the screen, the human eye will look feeling very delicatedisplay also particularly smooth. WAN, video transmission, due to bandwidthlimitations, the general network transmission of video data after compression, so thatnot only detrimental to the quality of the signal, but also for the transmission ofreal-time1920*1080at60Hz video signal is almost impossible the. Therefore,high-bandwidth, low loss, the antijamming fiber is usually used to transmituncompressed video signal in order to achieve long-range high-definition video withthe signal transmission.FPGA as the programmable logic gate array of high flexibility, and now hasinfiltrated many fields of communications, video, medical imaging, consumer goods,on-chip integration has a wealth of logic gates, memory, DSP module, gigabittransceivers, clock resources. embedded PowerPC/ARM Approves a wide variety oflogic control, arithmetic operations, the internal logic of parallel execution in aclock-driven operation makes it faster than the speed of implementation of othergeneral-purpose processor, while the use of hardware description language modifyand copy of the internal logic, which greatly facilitates the need for engineers in thedesign and development. FPGAs in the field of video image applications has becomean important research branch of engineering applications, it can handle the various algorithms involved in the video image, such as scaling, integration, edge detection,and its advantages in the study of multiple video images more prominent.This paper focuses on studies using single-mode fiber SDI video (the originalYCbCr422format video data), the use of the current mainstream FPGA devices toachieve DDR2synchronous dynamic memory controller and SDI data stream codec,data packing, unpacking controller, DVI/VGA high-definition video signal based onthe collection, storage, transfer and acquisition of digital synthesis flow of the DVI/VGA Signal to send the display to complete the display and other functions, the videosignal of secondary transmission in some special occasions, and display requirements,such as coal mines, building monitoring, meteorological systems, large studio, etc.,but also can easily be completed with other SDI interface device docking, conversionbetween different video interface.The paper is divided into five chapters, Chapter1introduces the status of currentresearch of the SDI optical fiber transmission system、the basis and significance of thetopics、main contents and technical indicators.Chapter2discusses the video fiber optic transmission system design, systemfunctional requirements analysis, based on fiber-optic transmission of uncompressedhigh definition video and uncompressed high-definition video programs based on theIP network contrast, an FPGA as the core device program of high-definition videooptical fiber transmission system.Chapter3describes the key technologies in the video fiber optic transmissionsystems. The video interface technology、interface definition of the common DVI/VGA video interface, signal type、the timing model, multi-frame caching mechanismin the video display. Optical fiber communication technology introduces opticaltransmitter, optical receiver of the basic principles of the common structure of theoptical module and the related technical indicators. Storage principle of thesynchronous dynamic memory interface, SDRAM, DDR2SDRAM structure, workstatus, and video image processing. Serial Digital Interface technologyintroduces itsinterface to the basic principles of data stream format, channel coding.Chapter4first introduces the basic structure of the Lattice FPGA and itsdevelopment process on the FPGA core technologies mentioned in Chapter3, on thisbasis. Including the use of FPGA VGA/VGA signals, signal acquisition FPGAsynthesis、FPGA implementation of the DDR2SDRAM read and write controller and3G-SDI controller.Chapter5for system debugging and results analysis, the main board power debug, debugging module, system debugging, and finally to complete the debuggingresults.Departure from the video collection, storage, transmission and display the basicprinciples of each module and each module of the core device FPGA, to build anFPGA-based video image processing system to complete the initial design goals, thesystem small size, low power consumption, the stability of the industry-standard.