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Journal Article
Fast Intermode Decision Algorithm Based on Contextual Mode and Priority Information for H.264/AVC Video Encoding System
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- Authors
- Hyun-Ki Jung, Hyo-Sung Kim, Byung-Gyu Kim, Chang-Ki Kim, Jeong-Ju Yoo
- Issue Date
- 2011-10
- Citation
- Optical Engineering, v.50, no.11, pp.1-12
- ISSN
- 0091-3286
- Publisher
- SPIE
- Language
- English
- Type
- Journal Article
- Abstract
- The recent H.264/AVC video coding standard provides a higher coding efficiency than previous standards. H.264/AVC achieves a bit rate saving of more than 50% with many new technologies, but it shows very heavy computational complexity. In this paper, a fast mode decision scheme for interframe coding is proposed to reduce the computational complexity for H.264/AVC video encoding system. To reduce the block mode decision complexity in interframe coding, we use the contextual information based on the co-located and neighboring macroblocks (MBs) to detect a proper MB that can be stopped early. Then, for the current MB, a priority information of the context is suggested for adding more mode types adaptively. The proposed algorithm shows the average speed-up factors of 59.11 to 77.41% for various sequences with a negligible bit increment and a minimal loss of image quality, in JM reference softwares.
- KSP Keywords
- Average speed, Bit rate, Co-located, Coding efficiency, Computational complexity, Contextual information, Decision algorithm, Decision scheme, Encoding system, Fast Mode Decision, H.264/AVC video