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Compression Performance Analysis in HEVC

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Part of the book series: Integrated Circuits and Systems ((ICIR))

Abstract

In this chapter, performance analysis of HEVC (Recommendation ITU-T H.265 | ISO/IEC 23008-2) in comparison with AVC (Recommendation ITU-T H.264 | ISO/IEC 14996-10) in terms of both objective as well as subjective quality assessments are given. Because of the increased flexibility offered by HEVC, methods to select the best coding parameters, in a rate-distortion sense, are also described. Special care has been taken to apply a unified approach when conducting subjective and objective quality evaluation between HEVC and AVC. Our overall evaluation study results show the coding efficiency of HEVC to be about twice higher than that of AVC.

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Notes

  1. 1.

    These fix values are pre-determined and they depend on PU size.

  2. 2.

    The horizontal cropping removed one half of the pixels so as to enable both the HEVC and AVC encoded sequences to be displayed side-by-side on the 3840 pixel-wide 4K monitor.

  3. 3.

    A 5° scale was selected for this study in lieu of more commonly used 7° and 3° scales, because it is known to work well to prioritize video quality improvement work during commercial encoder development.

  4. 4.

    The 69.4 % result was derived by summing the selection counts in the HEVC B, HEVC SB and NP columns of Table 9.12 and dividing by the total number of selection counts.

  5. 5.

    The earlier studies also used earlier versions of the HEVC draft standard and a slightly different evaluation methodology.

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Acknowledgments

Regarding Sect. 9.4, the authors wish to thank 4EVER consortium, British Broadcasting Corporation (BBC), Kamerawerk GmbH and Technicolor for providing the original video test sequences used for visual testing. Our special thanks and gratitude go also to T. K. Tan, of NTT Docomo, for his help and support in the preparation of coded video test sequences used for subjective performance evaluations in Sect. 9.4. Subjective evaluations performed at EPFL were possible thanks to the Swiss National Foundation for Scientific Research (FN 200021-143696-1), EC funded Network of Excellence VideoSense, and COST Action IC1003 European Network on Quality of Experience in Multimedia Systems and Services QUALINET. Efforts by Hiromi Nemoto for set up and conducting subjective evaluations at EPFL are also acknowledged.

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Correspondence to Teruhiko Suzuki .

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Tabatabai, A. et al. (2014). Compression Performance Analysis in HEVC. In: Sze, V., Budagavi, M., Sullivan, G. (eds) High Efficiency Video Coding (HEVC). Integrated Circuits and Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-06895-4_9

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  • DOI: https://doi.org/10.1007/978-3-319-06895-4_9

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