A Study on Fast Intra-Prediction Mode Decision Method based on Block Correlation for H.264/AVC
| Autor: | Chien-Hsiung Wu, 吳健雄 |
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| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 In this thesis, we propose a new fast mode decision method for intra-only H.264/AVC video coding. To speed up determining the optimal prediction mode for an intra-coded target block, we exploit the correlation between the target block and a set of adjacent blocks to reduce the computational complexity of the encoding process. The set of adjacent blocks consists of several spatial neighboring blocks in the same frame and one block in a previous frame positioned at the same spatial location as the target block. The method also utilizes a refreshing strategy not relying on correlation to enhance the video quality with little increase in computational complexity. Compared to the SATD-based (sum of absolute transformed differences) full mode decision algorithm used in the encoding model of H.264 (JM9.3), the proposed algorithm can reduce the computational complexity of intra coding by 40% on average with acceptable loss of rate-distortion performance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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