Fast intra-mode decision method based on DCT coefficients for H.264/AVC
- Authors
- Lim, Sojeong; Kim, Hyungwook; Choi, Youngkyoung; Yu, Sungwook
- Issue Date
- Feb-2015
- Publisher
- SPRINGER LONDON LTD
- Keywords
- Intra-prediction; Mode decision; DCT Coefficients; H.264/AVC
- Citation
- SIGNAL IMAGE AND VIDEO PROCESSING, v.9, no.2, pp 481 - 489
- Pages
- 9
- Journal Title
- SIGNAL IMAGE AND VIDEO PROCESSING
- Volume
- 9
- Number
- 2
- Start Page
- 481
- End Page
- 489
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/9898
- DOI
- 10.1007/s11760-013-0581-8
- ISSN
- 1863-1703
1863-1711
- Abstract
- This paper presents an efficient intra-mode decision method for H.264/AVC. By slightly changing the mode examination order, the proposed method obtains the discrete cosine transform (DCT) coefficients of the original 4 x 4 image blocks without requiring any additional computation. These DCT coefficients are efficiently utilized to determine the best modes for 4 x 4 luma blocks. Then, the proposed method makes use of the best mode information of the 4 x 4 luma blocks to determine the best modes for 16 x 16 luma blocks. A new chroma mode decision method is also presented, which efficiently combines several DCT coefficients from various 4 x 4 sub-blocks. As a result, the proposed method reduces the encoding time of the conventional methods while also improving the coding performance significantly. Simulation results show that the average BD-BR of the proposed method is 1.63% while the reduction in the encoding time of the reference software is 66.3% on average.
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Collections - College of ICT Engineering > School of Electrical and Electronics Engineering > 1. Journal Articles
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