用於數位視訊系統中運動偵測及運動估測之架構設計

Abstract

比對測試是在運動偵測及運動估測上最常用的方法。這種方法採取直接比 對像素來檢驗兩張畫面上的兩塊區域。本論文在探討實現以比對測試為基 礎的運動偵測與運動估測的問題。在運動偵測方面，提出一精確的方法用 於適應運動效應的交錯式至連續式掃描轉換。此方法運用時間軸、空間軸 資料的精確偵測法。並加入了在偵測區內偵測移動的長條物以其中的判斷 。此外，門檻值可隨空間上的變化調整。在運動估測方面，討論轉換及安 排依存圖。並對陣列式架構作分類、分析與比較。最後提出一具有彈性的 架構，提供了串接能力即可變搜索範圍。 Match test is a criterion examines the existence of motion between two regions on two pictures with direct pixel(s) matching. This dissertation presents issues about the realization of motion detection and motion estimation that are based on match test. For motion detection, a precise scheme on interlace pictures are proposed for motion adaptive interlace to progressive scan conversion. This detector considers both temporal and spatial information, and also includes a detection of single moving bar to enhance the detection. The thresholds are adapted by spatial variation. For motion estimation, a transformation of dependence graphs (DGs) and arrangement of DGs are presented. Classification, analysis and comparison of array architectures are described. Moreover, a flexible architecture that supports cascadibility and variable tracking range is constructed.