期刊名称：International Journal of Multimedia and Ubiquitous Engineering
印刷版ISSN：1975-0080
出版年度：2012
卷号：7
期号：2
出版社：SERSC
摘要：In H.264 video compression standard, B frame bi-directional predictions and its DIRECT mode coding are included to enhance video compression efficiency. However, such tools require a complex mode decision process and result in a long computation time. Therefore, fast algorithms are crucial in implementing H.264. In this paper, to save B frame encoding time, a fast DIRECT mode prediction algorithm is proposed, which determines DIRECT mode at an early stage by optimal mode pattern matching. Simulations show that the proposed algorithm can determine DIRECT mode without a complex mode decision process for 42% more macroblocks and, on mis-determination for DIRECT mode, cut down its rate-distortion (RD) cost increment by half, compared with Jin’s algorithm. This enables a fast B frame encoding with less quality degradation.
关键词：B frame encoding; DIRECT mode; H.264; video compression; mode prediction.
