Pico-Projector Video Signal Processing Unit Design And Implementation

Pico-projector has the characteristics of a projective color clear, compact structure and low standby power consumption. It can be used in the field for a long time and therefore it becomes the preferred carrier of electronic map display. In addition, the Pico-projector also has the documentation and video showing function. Pico-projector not only can meet the military, but also its features and conforms to the need of modern business mobile office. Hence it has a wide range of applications and market development prospects.This dissertation is based on the above requirements as the research object. Video signal processing is the key technology of the Pico-projector. The final result is developed to meet the dual-use handheld Pico-projector. The main research contents include:First, research on the development process and technical characteristics of video interface and color space. Combining with the actual functional requirements to decide the type of video interface and color space. Completion of the "embedded processor + platform of Android + FPGA image processing" overall program design.Second, base on the Pico-projector video processing unit hardware system architecture to design the hardware platform of video signal processing unit. The video processing unit contains conversion code circuit for the input video signal, mainly by TFP401 A decoder chip and external HDMI interface circuit; XC3S200AN-4FT256 C chip video signal processing platform and peripheral devices. To achieve a variety of sources input video signal format conversion to RGB color space, ultimately sent to DLP projection chip conforms to the specification of video images from FPGA.Third, based on the VESA_VGA timing standard completing logic coding and debugging on the FPGA. Achieve communication with the ARM instruction unit, automatic identification of key parameters, input pixel chroma enhancement, resolution adjustment, output pixel color compensation and regeneration of video control signals and so on. Auxiliary power management and HDL coding for low-power design to reduce Pico-projector’s power consumption.The video signal processing unit talked about in this dissertation. Completed the HDMI interface signals to DVI interface RGB true color video precisely synchronized and the video format conversion. The code portability is repeated testing. Output signal timing and projection effects of the hardware design are achieved the expected design goals. As well as it provides convenience for further optimization and function extension.