數位電子看板可播放生動動態影像，易於吸引人的目光，使得越來越多廣告商利用數位電子看板來宣傳。在多數情況下，播放媒體內容的大小並非符合LED電子看板解析度，因此需將輸入端的影像縮放至LED 電子看板正確畫面上。本研究基於可擴充、可重組的電子看板系統設計需求，提出一個階層式、模組化的控制器架構並採用PNN 影像插補器做為縮放的核心。利用此彈性可擴充大型電子看板架構，可根據需求組成想要電子看板解析度。並藉由PNN 影像插補器的平滑參數，可調整插補影像的銳利度和平滑度，對文字型的顯示內容其影像放大顯示保有其最大銳利度，而照片(natural picture)放大影像考量鋸齒效應，改用較大平滑度。以達到放大影像顯示最好的視覺感受。最後實作整合 PNN 影像縮放器LED 電子看板顯示控制器，我們可以彈性組 成LED 電子看板的顯示大小，並達到即時影像縮放至電子看板正確畫面上，並可視顯示需求調整影像的平滑銳利度，讓觀看者達到影像最好的視覺感受。Digital signage can play vivid video and is easy to attract people. More and moreadvertiser use digital signage to advertising. In many case, video content resolutiondon’t fit LED digital signage resolution. So we have to enlarge the input videoresolution to fit LED digital signage resolution.This paper base on extendable and reconfigurable LED digital signage designrequirements. We proposed hierarchical and modular controller architecture. And useprobabilistic neural network video interpolator to scale video resolution. Use this flexibleand extendable large digital signage architecture. We can combine any digital signageresolution we need. Using smoothing parameter of probabilistic neural networkinterpolator to adjust sharpness and smoothness of video frame. In order to the best visualexperience enlarge video frame. Text-based video content we should enlarge video framethe shaper the better. Because sharp effect natural picture video frame should enlarge thesmoother the better.Finally we implement PNN interpolator controller integrated into LED displaycontroller. We can flexibly combine signage resolution, and can real-time scale videoframe to signage. User can adjust sharpness and smoothness of video frame to the bestvisual experience.
