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Study on the Embedded High Resolution Video Graphics Array Display System

Author: LiuShiWang
Tutor: HuangZhanHua
School: Tianjin University
Course: Optical Engineering
Keywords: VGA ARM DSP JPEG decoding Ethernet interface
CLC: TP273
Type: Master's thesis
Year: 2007
Downloads: 362
Quote: 3
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Abstract


The the \It can not use the computer and the VGA display card , VGA image display and control . Major advertising and tips that can be applied to large - scale supermarkets, railway stations , airports and other public places information ; can also be installed on the factory floor , is used in the production process operation information display ; can also develop into a multimedia electronic calendar system used in the day-to-day life. The paper designs and implements a 1024 * 768 images ( XGA ) , 800 * 600 images (SVGA) and 640 * 480 images in three resolutions (VGA) display of the image . The main task of this paper is by analyzing the basic principle of VGA display and signal requirements , design , hardware and software structure of the entire system , including the occurrence of VGA timing and memory read timing , multimedia data storage and JPEG image decoding , Chinese characters and character display , the output of the audio signal , as well as through EPP interface , Ethernet interface and serial interface to achieve data transmission system and remote control functions . The main work of this paper include : 1 . Based on in-depth analysis of the VGA standard , the overall design of the embedded VGA display system and the basic functions . 2, the completion of the design of the respective units of the embedded VGA display system . Using the CPLD devices such as VGA timing and memory read timing occurred ; using high - speed digital-to-analog conversion chip ADV7120 VGA analog signal output ; ARM and DSP to achieve overall system control and data processing . 3, with a quick one-dimensional IDCT algorithm 8 29 multiplications and 11 additions complete a one-dimensional IDCT transform function to achieve the requirements of high-speed decoding JPEG images . 4 VGA display system is designed embedded software and PC software . Completed based on the Ethernet interface and the the EPP interface of data transmission and communication control and other functions . The results of this research - embedded high-resolution VGA display system board , fully able to meet the requirements after the experiment proved its display and the main parameters .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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