Conceptos Básicos
This paper provides a quantitative analysis of intra coding tools developed for the Enhanced Compression Model (ECM), which is the reference software for the next-generation video codec being explored by the Joint Video Experts Team (JVET). The analysis focuses on the selection rate of various luma and chroma intra coding tools across different ECM versions, video resolutions, and bitrates, offering insights to the standardization community.
Resumen
The paper presents a quantitative analysis of intra coding tools that are currently being developed and adopted in the Enhanced Compression Model (ECM) for the purpose of the post-VVC exploration at the Joint Video Experts Team (JVET).
Key highlights:
The analysis focuses on the selection rate of various luma and chroma intra coding tools, including IPM-based, BV-based, and other tools for luma, and IPM-based, cross-component, and other tools for chroma.
The selection rate statistics are provided for different ECM versions, video resolutions (JVET CTC classes), and bitrates (quantization parameters).
The analysis shows that simpler tools are being replaced by more advanced tools that require more encoder and/or decoder-side processing, such as template-based coding and texture analysis.
Data-driven tools, both in the form of offline training (e.g., MIP) and online training (e.g., cross-component models), are becoming more prevalent.
The statistical behavior of the tools is generally stable across the JVET CTC and BVI-DVC datasets, indicating that the exploration phase is progressing steadily towards the next-generation codec.
The paper concludes by suggesting that a similar quantitative study on inter coding tools of ECM could be conducted as future work.
Estadísticas
The BD-Rate performance of ECM versions over VTM in All-Intra (AI) configurations is provided:
ECM-11.0 software provides -12.8%, -23.7%, -24.8% coding gain over VTM in luma, Cb, and Cr components, respectively.