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JBE, vol. 25, no. 5, pp.698-708, September, 2020

DOI: https://doi.org/10.5909/JBE.2020.25.5.698

Fast Decision Method of Geometric Partitioning Mode and Block Partitioning Mode using Hough Transform in VVC

Minhun Lee, Juntaek Park, Gun Bang, Woong Lim, Donggyu Sim, and Seoung-Jun Oh

C.A E-mail: sjoh@kw.ac.kr

Abstract:

VVC (Versatile Video Coding), which has been developing as a next generation video coding standard. Compared to HEVC (High Efficiency Video Coding), VVC is improved by about 34% in RA (Random Access) configuration and about 30% in LDB (Low-Delay B) configuration by adopting various techniques such as recursive block partitioning structure and GPM (Geometric Partitioning Mode). But the encoding complexity is increased by about 10x and 7x, respectively. In this paper, we propose a fast decision method of GPM mode and block partitioning using directionality of block to reduce encoding complexity of VVC. The proposed method is to apply the Hough transform to the current block to identify the directionality of the block, thereby determining the GPM mode and the specific block partitioning method to be skipped in the rate-distortion cost search process. As a result, compared to VTM8.0, the proposed method reduces about 31.01% and 29.84% encoding complexity for RA and LDB configuration with 2.48% and 2.69% BD-rate loss, respectively.



Keyword: VVC, Hough transform, Fast algorithm, Block partitioning, Geometric Partitioning Mode

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