視訊格式轉換晶片之設計及實現

DESIGN AND FPGA IMPLEMENTATION OF A VIDEO SCALAR

陳建維(Chien-Wei Chen)

指導教授 ： 蔡明傑

大同大學/電機資訊學院/電機工程學系所/碩士(2006年)

摘要

由於現今多媒體及寬螢幕的快速發展，視訊格式轉換有其相對的重要性，例如將NTSC、 PAL、 HDTV視訊格式轉換為VGA視訊格式，本篇論文中視訊格式轉換晶片之架構可以使用FPGA或ASIC實現。一般傳統的視訊格式轉換晶片之架構須要大量的記憶體及較大的計算量，本篇論文提出在不損失影像品質下，節省大量記憶體的視訊格式轉換晶片之架構，以此架構使用FPGA將VGA(640X480)的視訊格式及時轉換為WXGA(1280X768)的視訊格式，且以每秒60個畫面顯示在WXGA的液晶面板( TFT-LCD plane )上。

關鍵字

影像放大 ； 視訊格式轉換

並列摘要

Recently, due to the wide diffusion of multimedia applications and wide area screens (e.g., Widescreen TFT LCD TV), the problem of video format conversion has significantly increased its importance. Video scaling is important in conversion between different formats such as NTSC, PAL, HDTV and between the VGA resolution to the various sizes included in MPEG coding. The architecture suitable for FPGA/ASIC implementation of a video scalar is presented in this paper. Conventional implementation of the filter may result in huge memory and computational requirement. The scheme proposed here results in enormous savings of memory normally required, without compromising on the video quality. In the present work, VGA compatible video sequence is scaled up to WXGA format. The FPGA implementation of the proposed video-scaling algorithm is capable of processing high-resolution, color pictures of sizes up to 1280x768 pixels at the real time video rate of 60 frames/second. The design has been realized by RTL compliant VHDL coding, and fits into a single Xilinx FPGA, and display to TFT-LCD plane that resolution is 1280x768 pixels.

並列關鍵字

image interpolation ； image scalar ； image scale ； interpolate ； interpolation. ； scale ； Video scalar

參考文獻

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