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Evaluation of the Image Backtrack-Based Fast Direct Mode Decision Algorithm

  • Choi, Yungho (Dept. of Electrical Engineering, Konkuk University) ;
  • Park, Neungsoo (Dept. of Computer Science and Engineering, Konkuk University)
  • Received : 2012.05.18
  • Accepted : 2012.07.04
  • Published : 2012.12.31

Abstract

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 backtrack-based fast (IBFD) algorithm and evaluates the performances of two promising fast algorithms (i.e., AFDM and IBFD). Evaluation results show that an image backtrack-based 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.

Keywords

References

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