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39th Meeting: Daejeon, KR, June 2025 2025-06-26 12:59
AHG12: TMRL blend
Authors: Saverio Blasi Nokia Gosala Kulupana Nokia Döne Bugdayci Sansli Nokia Jani Lainema Nokia
Abstract
In this contribution, a new mode is proposed based on blending TMRL predictors. A template search is performed to determine pairs of intra mode and MRL index. Corresponding predictors are then blended together to compute a prediction for the current block. Blending weights are computed based on the template costs.
Meeting Notes
JVET-AM0145 AHG12: TMRL blend [S. Blasi, G. Kulupana, D. Bugdayci Sansli, J. Lainema (Nokia)]

In this contribution, a new mode is proposed based on blending TMRL predictors. A template search is performed to determine pairs of intra mode and MRL index. Corresponding predictors are then blended together to compute a prediction for the current block. Blending weights are computed based on the template costs.

The impact on coding efficiency and runtimes of the proposed method over ECM-17.0 are reportedly {for Y, U, V, EncT, DecT, EncVmPeak, DecVmPeak}:

AI {-0.06%, -0.01%, -0.01%, 101.7%, 100.3%, 99.6%, 100.1%}

Encoding time increases by additional RD check.

It was asked how much gain is due to the non-directional mode.

This is not a replacement of TMRL, rather an addition on top.

Interest was expressed to investigate this in an EE. Options should be investigated to reduce encoding time, and also investigate the aspect of non-directional mode.

ARCHIVE :
JVET-AM0145-v1.pptx JVET-AM0145-v4.docx JVET-AM0145.xlsm
Decisions
Interest was expressed to investigate this in an EE. Options should be investigated to reduce encoding time, and also investigate the aspect of non-directional mode.
Citation