JVET-AE0056 Non-EE2: Changes on TIMD and SGPM for reducing ECM decoder complexity [Z. Fan, Y. Yasugi, T. Ikai (Sharp)]

This proposal aims to reduce the complexity of the ECM decoder. There are two changes made in this proposal for ECM.

• The first change is replacing timdHor and timdVer with dimdHor and dimdVer in the SGPM candidate list. This allows for the SGPM method to be used without the need to run the additional template matching process of TIMD.
• The second change involves reducing the number of template matching / number of candidate in TIMD, reducing the time required for the TIMD method.

Based on these changes, and the experiment results are as follows:

AI : 0.04% 0.08% 0.10% 99% 95%
RA: 0.05% -0.01% -0.03% 100% 101%

It was commented that reduction of decoder complexity is not of primary importance in this exploration, and the proposal would incur performance losses.

No action was taken on this.