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http://dx.doi.org/10.5909/JBE.2020.25.3.346

An Efficient Weight Signaling Method for BCW in VVC  

Park, Dohyeon (Korea Aerospace University, School of Electronics and Information Engineering)
Yoon, Yong-Uk (Korea Aerospace University, School of Electronics and Information Engineering)
Lee, Jinho (Electronics and Telecommunications Research Institute)
Kang, Jungwon (Electronics and Telecommunications Research Institute)
Kim, Jae-Gon (Korea Aerospace University, School of Electronics and Information Engineering)
Publication Information
Journal of Broadcast Engineering / v.25, no.3, 2020 , pp. 346-352 More about this Journal
Abstract
Versatile Video Coding (VVC), a next-generation video coding standard that is in the final stage of standardization, has adopted various techniques to achieve more than twice the compression performance of HEVC (High-Efficiency Video Coding). VVC adopted Bi-prediction with CU-level Weight (BCW), which generates the final prediction signal with the weighted combination of bi-predictions with various weights, to enhance the performance of the bi-predictive inter prediction. The syntax element of the BCW index is adaptively coded according to the value of NoBackwardPredFlag which indicates if there is no future picture in the display order among the reference pictures. Such syntax structure for signaling the BCW index could violate the flexibility of video codec and cause the dependency issue at the stage of bitstream parsing. To address these issues, this paper proposes an efficient BCW weight signaling method which enables all weights and parsing without any condition check. The performance of the proposed method was evaluated with various weight searching methods in the encoder. The experimental results show that the proposed method gives negligible BD-rate losses and minor gains for 3 weights searching and 5 weights searching, respectively, while resolving the issues.
Keywords
VVC; VTM; BCW; Inter Prediction; Bi-prediction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 High Efficiency Video Coding, Version 1, Rec. ITU-T H.265, ISO/IEC 23008-2, Jan. 2013.
2 B. Bross, J. Chen, S. Liu and Y.-K. Wang, "Versatile Video Coding (Draft 8)," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-Q2001, Jan. 2020.
3 Available at: https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/-/tags
4 F. Bossen, X. Li, and K. Suehring, "AHG report: Test model software development (AHG3)," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-Q0003, Jan. 2020.
5 J. Chen, Y. Ye, and S. Kim, "Algorithm description for Versatile Video Coding and Test Model 8 (VTM 8)," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-Q0003, Jan. 2020.
6 D. Park, Y.-U. Yoon, J.-G. Kim, J. Lee, and J. Kang, "CE10-realted: Simplification of triangular partitions," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-M0352, Jan. 2019.
7 D. Park, Y.-U. Yoon, J. Do, J.-G. Kim, J. Lee, and J. Kang, "Non-CE4: BCW clean-up for weight signaling," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-P0317, Oct. 2019.
8 D. Park, Y.-U. Yoon, J.-H. Do, and J.-G. Kim, "A Method of Merge Candidate List Construction using and Alternative Merge Candidate," JBE Vol. 24, No. 1, Jan. 2019.
9 F. Bossen, J. Boyce, X. Li. V. Sergin and K. Suhring, "JVET common test conditions and software reference configurations for SDR video," Joint Video Experts Team of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, JVET-N1010, March 2019.
10 G. Bjontegaard, "Calculation of average PSNR differences between RD curves," ITU-T SG.16 Q.6, VCEG-M33, Apr. 2001.