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Optical Engineering

Fast intermode decision algorithm based on contextual mode and priority information for H.264/AVC video encoding system
Author(s): Hyun-Ki Jung; Hyo-Sung Kim; Byung-Gyu Kim
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Paper 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.

Paper Details

Date Published: 1 November 2011
PDF: 13 pages
Opt. Eng. 50(11) 117403 doi: 10.1117/1.3647552
Published in: Optical Engineering Volume 50, Issue 11
Show Author Affiliations
Hyun-Ki Jung, Sun Moon Univ. (Korea, Republic of)
Hyo-Sung Kim, Sun Moon Univ. (Korea, Republic of)
Byung-Gyu Kim, Sun Moon Univ. (Korea, Republic of)

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