微型投影仪视频信号处理单元的设计与实现
发布时间：2018-11-06 14:35
【摘要】：微型投影仪具有投影色彩清晰、结构紧凑、可野外使用和功耗低待机长等特点成为电子地图显示的首选。除地图显示功能外,微型投影仪还具备文档及视频放映功能,不仅满足军事用途,其鲜明的特点也符合现代商务移动办公的需要,因而具有广泛应用市场和发展前途。本文正是基于以上需求,对微型投影仪中的关键技术,视频信号处理作为对象展开深入研究。最终成果为开发出满足军民两用的手持式微型投影仪。主要研究内容包括:1.研究当今视频接口与色度空间的发展历程和技术特征,结合实际功能需求,选定视频接口及色度空间类型方案,并完成采用“嵌入式处理器+安卓操作平台+FPGA图像处理”的总体方案设计。2.研究微型投影仪视频处理单元硬件系统架构,完成视频信号处理单元的硬件平台电路设计。视频处理单元包含了输入视频信号转换码电路,主要由TFP401A解码芯片和外接HDMI接口电路组成;基于XC3S200AN-4FT256C芯片的视频信号处理平台及外围器件。实现将输入的多种视频格式源信号转换为RGB色彩空间,最终由FPGA对DLP投影芯片发出符合规范的视频图像。3.参照VESA_VGA时序标准,基于FPGA完成接口协议转换的逻辑代码编写与调试。实现与ARM单元指令通信,关键参数自动识别,输入像素色度增强,分辨率调整,输出像素色度补偿和视频控制信号再生成等。对微型投影仪进行辅助电源管理,HDL编码进行低功耗设计等手段降低其功耗。本论文的视频信号处理单元,完成了HDMI接口信号到DVI接口的RGB真彩视频精确同步与视频格式转换,代码采用模块化设计预留下扩展空间。经测试验证,硬件设计输出信号时序及投影效果均达到了预期的设计目标,同时也为后期进一步优化性能及扩展功能打下了良好的基础。
[Abstract]:The miniature projector has the characteristics of clear color, compact structure, field use and low power consumption. It is the first choice of electronic map display. In addition to the map display function, the micro projector also has the functions of document and video projection, which not only meet the military purposes, but also meet the needs of modern business mobile office, so it has a wide application market and development prospect. Based on the above requirements, the key technology of micro projector, video signal processing, is studied in this paper. The final result is the development of a hand-held micro projector for both military and civil use. The main contents are as follows: 1. This paper studies the development course and technical characteristics of video interface and chrominance space, and selects the scheme of video interface and chrominance space type according to the actual functional requirements. And complete the "embedded processor Android operating platform FPGA image processing" overall design. 2. The hardware system architecture of video processing unit of micro projector is studied, and the hardware platform circuit design of video signal processing unit is completed. The video processing unit includes the input video signal conversion code circuit, which is mainly composed of the TFP401A decoding chip and the external HDMI interface circuit, the video signal processing platform based on the XC3S200AN-4FT256C chip and the peripheral devices. The input source signal of various video formats is converted into RGB color space, and finally, the FPGA sends out the standard video image to the DLP projector chip. 3. 3. Referring to VESA_VGA timing standard, the logic code of interface protocol conversion based on FPGA is written and debugged. It realizes communication with ARM unit instruction, automatic recognition of key parameters, enhancement of input pixel chromaticity, resolution adjustment, output pixel chrominance compensation and video control signal re-generation. The power consumption of micro projector is reduced by means of auxiliary power management and low power design by HDL coding. The video signal processing unit of this paper completes the precise synchronization and video format conversion of RGB real color video from HDMI interface signal to DVI interface. The code adopts modularized design to reserve expansion space. The test results show that the timing of the output signal and the projection effect of the hardware design reach the expected design goal, and also lay a good foundation for the further optimization of the performance and the extended function in the later stage.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8
本文编号：2314566
[Abstract]:The miniature projector has the characteristics of clear color, compact structure, field use and low power consumption. It is the first choice of electronic map display. In addition to the map display function, the micro projector also has the functions of document and video projection, which not only meet the military purposes, but also meet the needs of modern business mobile office, so it has a wide application market and development prospect. Based on the above requirements, the key technology of micro projector, video signal processing, is studied in this paper. The final result is the development of a hand-held micro projector for both military and civil use. The main contents are as follows: 1. This paper studies the development course and technical characteristics of video interface and chrominance space, and selects the scheme of video interface and chrominance space type according to the actual functional requirements. And complete the "embedded processor Android operating platform FPGA image processing" overall design. 2. The hardware system architecture of video processing unit of micro projector is studied, and the hardware platform circuit design of video signal processing unit is completed. The video processing unit includes the input video signal conversion code circuit, which is mainly composed of the TFP401A decoding chip and the external HDMI interface circuit, the video signal processing platform based on the XC3S200AN-4FT256C chip and the peripheral devices. The input source signal of various video formats is converted into RGB color space, and finally, the FPGA sends out the standard video image to the DLP projector chip. 3. 3. Referring to VESA_VGA timing standard, the logic code of interface protocol conversion based on FPGA is written and debugged. It realizes communication with ARM unit instruction, automatic recognition of key parameters, enhancement of input pixel chromaticity, resolution adjustment, output pixel chrominance compensation and video control signal re-generation. The power consumption of micro projector is reduced by means of auxiliary power management and low power design by HDL coding. The video signal processing unit of this paper completes the precise synchronization and video format conversion of RGB real color video from HDMI interface signal to DVI interface. The code adopts modularized design to reserve expansion space. The test results show that the timing of the output signal and the projection effect of the hardware design reach the expected design goal, and also lay a good foundation for the further optimization of the performance and the extended function in the later stage.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8
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