dlp显示系统中的视频处理详解.pdfVIP

VIDEO PROCESSING FOR DLPTM DISPLAY SYSTEMS Vishal Markandey, Todd Clatanoff, Greg Pettitt Digital Video Products, Texas Instruments, Inc. P.O.Box 655012, MS 41, Dallas, TX 75265 ABSTRACT Texas Instruments’ Digital Light ProcessingTM (DLPTM) technology provides all-digital projection dis- plays that offer superior picture quality in terms of resolution, brightness, contrast, and color fidelity. This paper provides an overview of the digital video processing solutions that have been developed by Texas Instruments for the all-digital display. The video processing solutions include: progressive scan conversion, digital video resampling, picture enhancements, color processing, and gamma processing. The real-time implementation of the digital video processing is also discussed, highlighting the use of the Scanline Video Processor (SVP) and the development of custom ASIC solutions. INTRODUCTION The Digital Micromirror DeviceTM (DMDTM) is a binary spatial light modulator developed at Texas Instruments. The DMD consists of an array of movable micromirrors functionally mounted over a CMOS SRAM. Each mirror is independently controllable and is used to modulate reflected light, mapping a pixel of video data to a pixel on display. A DMD mirror is controlled by loading data into the memory cell located below the mirror. The data electrostatically controls the mirror’s tilt angle in a binary fashion, where the mir- ror states are either +10 degrees (ON) or -10 degrees (OFF). Light reflected by the ON mirrors is then passed through a projection lens and onto a screen. The DMD forms the h