Most frequent mode for intra-mode coding in video coding

• Published in: Electronics letters 2019-02, Vol.55 (4), p.188-190
• Main Authors: Yoon, Y.-U, Park, D.-H, Kim, J.-G, Lee, J, Kang, J
• Format: Article
• Language: English
• Subjects: Image and vision processing and display technology; intra‐mode coding method; intra‐prediction modes; intra‐prediction performance; MFM; most frequent intra mode; most probable mode; MPM; telecommunication standards; versatile video coding standard; video coding; VVC
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2018.7452

The emerging versatile video coding (VVC) standard currently adopts 67 intra-prediction modes in order to improve the intra-prediction performance. The most probable mode (MPM) is used in video coding to encode the prediction mode efficiently based on the modes of the neighbouring blocks. Due to an increase in the number of intra-modes and increase in the resolution of the input sequence, it is necessary to efficiently encode the intra-mode of the current block. This Letter proposes an efficient intra-mode coding method extending MPM called most frequent mode (MFM), which exploits the number of occurrences of the modes in the neighbouring blocks. The proposed MFM derives the most frequent intra-mode. Then the derived MFM is signaled by a flag with a higher priority than MPM. Experimental results show that, compared to the test model of VVC (VTM), the proposed method gives up to 0.48% Bjotegaard-Delta-rate savings for the all-intra-configuration.