Search Word(s) in Title, Keywords, Authors, and Abstract: Mode Decision

Evaluation of the Image Backtrack-Based Fast Direct Mode Decision Algorithm
Yungho Choi and Neungsoo Park
Page: 685~692, Vol. 8, No.4, 2012
10.3745/JIPS.2012.8.4.685
Keywords: H.264/AVC, Bi-Directional Prediction, Image Backtracking, Fast Algorithm, Mode Decision
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B frame bi-directional predictions and the DIRECT mode coding of the H.264 video compression standard necessitate a complex mode decision process, resulting in a long computation time. To make H.264 feasible, this paper proposes an image backtrackbased fast (IBFD) algorithm and evaluates the performances of two promising fast algorithms (i.e., AFDM and IBFD). Evaluation results show that an image backtrackbased fast (IBFD) algorithm can determine DIRECT mode macroblocks with 13% higher accuracy, as compared with the AFDM. Furthermore, IBFD is shown to reduce the motion estimation time of B frames by up to 23% with a negligible quality degradation