JVET-Q0627 On Dependent Quantization: combination of JVET-Q0243 and JVET-Q0227 [P. Le Léannec, E. François (InterDigital)] [late]

This contribution relates to Dependent Quantization and combines the proposals from JVET-Q0243 on using 8 quantization states instead of 4 states in the current VTM, and JVET-Q0227 on using an qP-dependent offset when applying the scaling process for transform coefficients.

The reported psnr-Y, U, V BD-rate variations compared to VTM7.0 when using 8 quantization states are:

AI: –0.47%, 0.42%, 0.43% (Y, Cb, Cr) at 109% encoding time and 100% decoding time
RA: –0.38%, –0.05%, –0.12% (Y, Cb, Cr) at 106% encoding time and 101% decoding time
LB: –0.58%, 0.18%, 0.36% (Y, Cb, Cr) at 106% encoding time and 101% decoding time

No need for presentation.