tree 0deb5ea3d7c765080ce491217437b769232ae07a
parent 60a35f2e125a0eff1a6dee58dafc615debe37939
author Paul Wilkins <paulwilkins@google.com> 1582822753 +0000
committer Paul Wilkins <paulwilkins@google.com> 1584640748 +0000

Small change to av1_frame_type_qdelta()

This change gives slight improvements to PSNR and VMAF
metrics with a 4 layer ARF structure and max interval of 16
but slightly larger gains when 5 levels are used when the max
interval is increased to 32.  Slightly worse in SSIM for the
low and mid res sets.

STATS_CHANGED

(av psnr, ov psnr, ssim, psnr-hvs, VMAF)
Max ARF interval 16
Low res:  0.008	-0.017	0.171 -0.053 -0.088
UGC-360: -0.014	-0.156	0.035 -0.105 -0.204
Mid res: -0.005	-0.054	0.237 -0.114 -0.222

Max ARF interval 32
Low res: -0.069	-0.127	0.155 -0.123 -0.226
UGC-360: -0.118	-0.374 -0.106 -0.280 -0.425
Mid res: -0.090	-0.157	0.272 -0.217 -0.323

Change-Id: I5c991f193218b8a19738e94ee8feab71cc5dc2bd