Efficient Motion Vector Re-Estimation Based on a Novel Cost Model for a H.264/AVC Transcoder

In transcoding, it is well known that refinement of the motion vectors is critical to enhance the quality of transcoded video while significantly reducing transcoding complexity. This paper proposes a novel cost model to estimate the rate-distortion cost of motion vector composition in order to deve...

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Bibliographic Details
Published inIEICE Transactions on Information and Systems Vol. E99.D; no. 3; pp. 777 - 780
Main Authors HONG, Soongi, CHOE, Yoonsik, KIM, Yong-Goo
Format Journal Article
LanguageEnglish
Japanese
Published The Institute of Electronics, Information and Communication Engineers 01.01.2016
Subjects
Complexity
Design engineering
Gain
H.264/AVC
Mathematical analysis
Mathematical models
motion vector cost estimator
motion vector re-estimation
Optimization
Transcoders
transcoding
Vectors (mathematics)
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Summary:In transcoding, it is well known that refinement of the motion vectors is critical to enhance the quality of transcoded video while significantly reducing transcoding complexity. This paper proposes a novel cost model to estimate the rate-distortion cost of motion vector composition in order to develop a reliable motion vector re-estimation method that has reasonable computation cost. Based on a statistical analysis of motion compensated prediction errors, we design a basic form of the proposed cost model as a function of distance from the optimal motion vector. Simulations with a transcoder employing the proposed cost model demonstrate a significant quality gain over representative video transcoding schemes with no complexity increase.
Bibliography:ObjectType-Article-1
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ISSN:0916-8532
1745-1361
DOI:10.1587/transinf.2015EDL8181