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Transcoding method from H.264/AVC to high efficiency video coding based on similarity of intraprediction, interprediction, and motion vector

[+] Author Affiliations
Mei-Feng Liu

East China Institute of Technology, School of Mechanical and Electronics Engineering, Nanchang 330013, China

Guo-Yun Zhong

East China Institute of Technology, College of Information Engineering, Nanchang 330013, China

Xiao-Hai He, Lin-Bo Qing

Sichuan University, College of Electronics and Information Engineering, Chengdu 610065, China

J. Electron. Imaging. 25(5), 053028 (Oct 14, 2016). doi:10.1117/1.JEI.25.5.053028
History: Received April 5, 2016; Accepted September 21, 2016
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Abstract.  Currently, most video resources on line are encoded in the H.264/AVC format. More fluent video transmission can be obtained if these resources are encoded in the newest international video coding standard: high efficiency video coding (HEVC). In order to improve the video transmission and storage on line, a transcoding method from H.264/AVC to HEVC is proposed. In this transcoding algorithm, the coding information of intraprediction, interprediction, and motion vector (MV) in H.264/AVC video stream are used to accelerate the coding in HEVC. It is found through experiments that the region of interprediction in HEVC overlaps that in H.264/AVC. Therefore, the intraprediction for the region in HEVC, which is interpredicted in H.264/AVC, can be skipped to reduce coding complexity. Several macroblocks in H.264/AVC are combined into one PU in HEVC when the MV difference between two of the macroblocks in H.264/AVC is lower than a threshold. This method selects only one coding unit depth and one prediction unit (PU) mode to reduce the coding complexity. An MV interpolation method of combined PU in HEVC is proposed according to the areas and distances between the center of one macroblock in H.264/AVC and that of the PU in HEVC. The predicted MV accelerates the motion estimation for HEVC coding. The simulation results show that our proposed algorithm achieves significant coding time reduction with a little loss in bitrates distortion rate, compared to the existing transcoding algorithms and normal HEVC coding.

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Citation

Mei-Feng Liu ; Guo-Yun Zhong ; Xiao-Hai He and Lin-Bo Qing
"Transcoding method from H.264/AVC to high efficiency video coding based on similarity of intraprediction, interprediction, and motion vector", J. Electron. Imaging. 25(5), 053028 (Oct 14, 2016). ; http://dx.doi.org/10.1117/1.JEI.25.5.053028


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A Joint Compression Scheme of Video Feature Descriptors and Visual Content. IEEE Trans Image Process Published online Nov 16, 2016;
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