Efficient PU Mode Decision and Motion Estimation for H.264/AVC to HEVC Transcoder

H.264/AVC has been widely applied to various applications. However, a new video compression standard, High Efficient Video Coding (HEVC), had been finalized in 2013. In this work, a fast transcoder from H.264/AVC to HEVC is proposed. The proposed algorithm includes the fast prediction unit (PU) deci...

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Bibliographic Details
Published in:Signal and image processing : an international journal 2014-04, Vol.5 (2), p.81-93
Main Authors: Chen, Zong-Yi, Fang, Jiunn-Tsair, Liao, Tsai-Ling, Chang, Pao-Chi
Format: Article
Language:English
Subjects:
Algorithms
Encoding
Mathematical analysis
Motion simulation
Plutonium
Transcoders
Vectors (mathematics)
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Summary:H.264/AVC has been widely applied to various applications. However, a new video compression standard, High Efficient Video Coding (HEVC), had been finalized in 2013. In this work, a fast transcoder from H.264/AVC to HEVC is proposed. The proposed algorithm includes the fast prediction unit (PU) decision and the fast motion estimation. With the strong relation between H.264/AVC and HEVC, the modes, residuals, and variance of motion vectors (MVs) extracted from H.264/AVC can be reused to predict the current encoding PU of HEVC. Furthermore, the MVs from H.264/AVC are used to decide the search range of PU during motion estimation. Simulation results show that the proposed algorithm can save up to 53% of the encoding time and maintains the rate-distortion (R-D) performance for HEVC.
ISSN:2229-3922
0976-710X
DOI:10.5121/sipij.2014.5208