JVET-AL0193 Non-EE2: Extension of Template Types in Regression-Based GPM [Y. Yao, J. Huo, W. Zhang, F. Yang (Xidian Univ.), B. Li, F. Xing, P. Han, Z. Wang (Hisense)]

This contribution proposes an extension of the template types used in the regression-based GPM. Specifically, a two line above and two column left template is utilized for computing the affine linear model parameters.

The impact on coding efficiency and runtimes over ECM-16.1 is reportedly {for Y, U, V, EncT, DecT}:

RA: {XXX, XXX, XXX, XXX, XXX}

LDB: { -0.02%, 0.10%, -0.36%, #NUM!, #NUM! }

According to proponents, encoding time is increased by additional RDO checks. This is not justified by the relatively small coding gain.

Further study recommended to improve the tradeoff. Not mature for EE.