適應性模式選取於運動估測之H.264視訊編碼

Adaptive Mode Selection for Motion Estimation in H.264 Video Coding

劉邦毅(Bang-Yi Liu)

指導教授 ： 張元翔

中原大學/工學院/資訊工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000499

摘要

H.264視訊標準具有支援低位元率及高視訊品質的能力。雖然H.264視訊編碼器可提供低位元率，但其高度的計算複雜度會導致冗長的編碼時間。在本論文中，提出一個基於JM原始碼的方法，稱為「適應性模式選取法」，應用於H.264視訊編碼之運動估測。研究方法主要分成兩個部份說明︰(1)樣板畫格之適應值計算；及(2)適應性模式選取。本方法使用十四組測試視訊進行評估，研究結果顯示，所提出的適應性模式選取法與JM全域搜尋法比較，在維持低位元率及視訊品質的前提下，可大幅節省約20%的編碼時間。

關鍵字

運動估測 ； 運動補償 ； H.264 ； 全域搜尋

並列摘要

H.264 video standard is capable of providing good video quality at lower bit rates. Despite the low bit rates, H.264 video encoder suffers high computation complexity, resulting in substantial encoding time. In this paper, we propose a method based on JM source codes called the “Adaptive Mode Selection” (AMS) for motion estimation in H.264 video coding. The method can be presented in two phases: (1) Computation of adaptive values in reference frames; and (2) Adaptive mode selection. Our method was evaluated using 14 test videos and the results showed that the proposed AMS method, as compared with the JM full search method, could significantly save ~20% of encoding time, while maintaining low bit rates and video quality.

並列關鍵字

H.264 ； Full Search ； Motion Estimation，Motion Compensation

參考文獻

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