JVET-AJ0353 Crosscheck of JVET-AJ0115 (EE2-3.11: Regression-based GPM extension) [F. Wang (OPPO)] [late]

JVET-AJ0372 BoG Report: Group of ECM tools with large memory access [X. Li (BoG chair)]

This was presented Thu 7 Nov. 1515

This document contains the report of the BoG on group of tools with large memory access. The BoG met on 11/6 Wednesday 10:15am –11:35am.

Mandates

With regard to AHG7 activities, it was agreed to establish a new group of tools with large memory access, e.g by needing large lookup tables. It is however also necessary to take into account the granularity of usage, e.g. it is different if a large amount of coefficient values needs to be reloaded for every 4x4 block or for an entire CTU.

This BoG was to further work on criteria, and set up a list of tools that would be added to such a group.

Recommendations

• Tool list
  • PDP
  • Enhanced MTS
  • LFNST extension
  • NSPT
  • Fixed filter in ALF
• Cfg Options (For tools which extended the tools in VVC, the group off test should only turn off the extended part while leaving the VVC tool unchanged)
  • PDP control is available
  • The proponents of Enhanced MTS and LFNST extension will try to
  • The proponents NSPT and Fixed filter in ALF will implement the control
• Summary table

Note that the lookup table sizes are counted based on the ECM-14 implementation, which has not been fully optimized for memory usage.

The tools with lookup table size larger than 64Kbytes. Note that Kbytes =1000bytes in the following discussions.