H.264/AVC是目前已發展完成並且壓縮率最高的視訊編碼標準，它支援Intra_16×16、Intra_4×4的亮度區塊(Luminance)及Intra_8×8的色彩區塊(Chrominance)做畫面內預測編碼。H.264/AVC利用相鄰的畫素間的相關性，以減少I畫面的資料量，以達到壓縮目的。 這些區塊對於所有可能的預測模式，逐一的運算會增加龐大的計算量。因此為了要降低畫面內預測編碼的運算複雜度，本論文提出H.264/AVC畫面內預測編碼快速模式決策機制降低編碼所需的時間。本論文所提出的演算法主要是針對4×4亮度區塊，可以達成目的而不必逐一計算九種模式的預測。實驗的結果顯示，本論文所提出的演算法，可以有效地降低運算複雜度，同時也可以維持畫面品質。 H.264/AVC video coding standard is the newest and most efficient coding standard currently available. H.264/AVC enables Intra_4×4, Intra_16×16 for luminance (Luminance) blocks and Intra_8×8 for chrominance (Chrominance) blocks intra prediction. H.264/AVC utilizes the relationship between neighboring pixels to reduce data in I frames so as to reach the goal of compression. It increases a lot of computational loading to calculate each possible prediction mode for every intra block. For reducing the computational complexity of intra prediction, we propose a Fast Intra Prediction Mode Decision Algorithm for H.264/AVC standard to save the time for intra prediction. The main idea of the algorithm we proposed is to reach the goal of Intra_4×4 without full calculating of all the 9 possible prediction modes. Experimental results show that the proposed algorithm can not only reduce the computing complexity effectively, but also maintain the video quality at the same time.
