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ITU Journal: ICT Discoveries

The ITU Journal: ICT Discoveries publishes original research on ICT technical developments and their policy and regulatory, economic, social and legal dimensions. It builds bridges between disciplines, connects theory with application, and stimulates international dialogue. This interdisciplinary approach reflects ITU’s comprehensive field of interest and explores the convergence of ICT with other disciplines. It also features review articles, best practice implementation tutorials and case studies. The ITU Journal welcomes submissions at any time, on any topic within its scope.

English

Data-driven Intra-prediction Modes in the Development of the Versatile Video Coding Standard

Abstract – In this paper, intra-prediction modes for video coding that were designed using data-driven methods are presented. These predictors were incorporated into a test model of the emerging versatile video coding (VVC) standard and yield compression benefit over state-of-the-art intra-prediction tools. However, most of the use cases for video coding require severe complexity and memory restrictions, in particular at the decoder side. As data-driven methods typically result in predictors that are described by a large set of parameters and operations, satisfying these constraints turned out to be a difficult task. The purpose of this paper is to outline key steps in the complexity reduction of the trained intra-prediction modes that were discussed in the VVC standardization activity. These simplifications finally led to matrix-based intra-prediction (MIP) which is part of the current VVC draft international standard.

English

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