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Link to original content: https://doi.org/10.1007/s11227-016-1895-4
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Parallelization and performance evaluation of open-source HEVC codecs

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Abstract

High Efficiency Video Coding (HEVC) was developed by the Joint Collaborative Team on Video Coding (JCT-VC) to replace the current H.264/Advanced Video Coding (AVC) standard, which has dominated digital video services in all segments of the domestic and professional markets for over 10 years. In terms of rate-distortion, HEVC roughly doubles the compression performance of H.264/AVC, but at a cost of extremely high computational complexities during encoding. Parallelizing HEVC encoding is an efficient way of fulfilling this computational requirement. Since its standardization, several open-source HEVC video codecs have been developed with parallel encoding capabilities. This paper presents a rate-distortion/complexity analysis of the open-source HEVC codecs using objective measures of assessment to analyze their real parallelization capabilities. Experimental results show that DivX265 and x265 obtain the best parallel performance on average for the high-quality encoding scenario. In the case of the high-speed encoding scenario, x265 obtains the best parallel performance. In both scenarios, the coding efficiency of the encoders remains virtually unaffected regardless of the amount of parallelism.

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Acknowledgments

This work was jointly supported by the Spanish Ministry of Economy and Competitiveness (MINECO) and the European Commission (FEDER funds) under the Project TIN2015-66972-C5-2-R, and by the Spanish Ministry of Education, Culture and Sports under the Grant FPU13/04601.

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Authors and Affiliations

  1. Albacete Research Institute of Informatics (I3A), University of Castilla-La Mancha, Albacete, Spain

    David García-Lucas, Gabriel Cebrián-Márquez & Pedro Cuenca

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  1. David García-Lucas
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  2. Gabriel Cebrián-Márquez
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  3. Pedro Cuenca
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Correspondence to Pedro Cuenca.

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García-Lucas, D., Cebrián-Márquez, G. & Cuenca, P. Parallelization and performance evaluation of open-source HEVC codecs. J Supercomput 73, 495–513 (2017). https://doi.org/10.1007/s11227-016-1895-4

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