標題: | 視訊編碼泛運動參數估測之硬體架構 Architecture for Global Motion Parameter Estimation in Video Coding |
作者: | 蔡兆曛 Shiang-Whea Lin 張文鐘 Wen-Thong Chang 電信工程研究所 |
關鍵字: | 泛運動參數;區塊最小均方根遞迴法;global motion parameters;block-recursive least mean square algorithm |
公開日期: | 1992 |
摘要: | 在本論文中, 主要提出應用於混合式視訊編碼描述影像放大縮小及移動等 泛運動參數估測之硬體架構。由於連續畫面之相關性非常大, 於是這些運 動參數便可利用描述兩連續畫面之時空相關方程式所求得。利用區塊最小 均方根遞迴法找出運動參數的估計值, 使得區域性平均位移誤差達到最小 。利用本論文之硬體架構計算這些泛運動參數所須的時間能滿足即時需 求, 且計算之複雜度亦大大降低, 原因是本論文之硬體架構只用了很少的 乘法器。在本論文中, 將以傳統的方法與本文所提之泛運動參數估測作比 較, 並可發現使用泛運動參數估測確實使傳送之資料量大為減低, 而且效 果亦較傳統的方法為好。 An architecture for the computation of zooming and translational motion parameters for hybrid sequential video coding is proposed. These parameters are derived based on the spatial-temporal constraint between two consecutive frames. Block-recursive least mean square algorithm is used to estimate the parameters by minimizing the local mean squared displaced frame difference. The computational time is almost equal to the traditional block matching method, and computational complexity is significantly reduced by using only a few number of multipliers. Bits rate reduction with the global motion vector in video coding is analyzed. Performance comparsion with that of the conventional block matching method is made. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT810436007 http://hdl.handle.net/11536/56987 |
顯示於類別: | 畢業論文 |