This commit fixes the computation of rate_nocoef for situation when
rate_y is uninitialized at INT_MAX for x->skip is true.
Change-Id: If3dde4e4ee16667f4408067d3bb3084f916272f1
Instead of testing all interpfilter-BMC/OBMC combinations, we choose
the best interpolation filter based on regular inter prediction.
Reduction in encoding time: ~10%
Drop in performance gain: 0.08% lowres, 0.04% midres
Change-Id: Ifc19097a918ac76b529db9af4c60e2c70e93f7ad
Using the up-sampled reference frames in sub-pixel motion search is
enabled as a speed feature for good-quality mode speed 0 and speed 1.
Change-Id: Ieb454bf8c646ddb99e87bd64c8e74dbd78d84a50
Coding gain on screen_content is 12.2% (was 6.6%).
Some features such as frame-level color buffer, adaptive
entropy coding, are coming in future patches.
Change-Id: I2658cf5ec0cbb02cff685475759f3b68c9807697
Pixel domain distortion calculation is enabled for the rd loop of
inter sub8x8 and intra 4x4 cases.
Coding gain: 0.124% derflr, 0.122% derfhd
Change-Id: I43b47fe81b4f5ccc1c66bc626bd310c413a1ed87
This sets up the interface for 3 speed features that progressively
eliminate a greater number of transforms in ext tx using
pre-trained support vector machines.
Each speed feature still needs to be implemented.
Change-Id: Ia508aeadc0cffdc080fb227f357a5d1dfbca08e2
This commit fixes an encoding issue related to var-tx and ref-mv
experiments that causes the codec to use random values for transform
block skip flag.
Change-Id: I8daa6d6b88ea45b5bbeb81b43dd0eeff545c8e5a
The sum of squared value of a block can overflow 32bit, this commit
changes to use int64_t to avoid the overflow issue.
Change-Id: I78fcd6999634f186f86d649cfce85d97a993d040
Up-sampled the reference frames to 8 times in each dimension using
the 8-tap interpolation filter. In sub-pixel motion search, use the
up-sampled reference frames to find the best matching blocks. This
largely improved the motion search precision, and thus, improved
the compression quality. There was no change in decoder side.
Borg test and speed test results:
1. On derflr set,
Overall PSNR gain: 1.306%, and SSIM gain: 1.512%.
Average speed loss on derf set was 6.0%.
2. On stdhd set,
Overall PSNR gain: 0.754%, and SSIM gain: 0.814%.
On hevchd set,
Overall PSNR gain: 0.465%, and SSIM gain: 0.527%.
Speed loss on HD clips was 3.5%.
Change-Id: I300ebaafff57e88914f3dedc8784cb21d316b04f
Includes various cosmetic changes and refactoring including
naming the sharp filters differently (since they are no longer
8-tap).
Change-Id: Ida5a19ca0daa9f6a64a6734394c685b2a4a2564a
The interintra experiment, which combines an inter prediction and an
inter prediction have been ported from the nextgen branch. The
experiment is merged into ext_inter, so there is no separate configure
option to enable it.
Change-Id: I0cc20cefd29e9b77ab7bbbb709abc11512320325
Adds hooks to use 32x32 ext-tx. Also adds scan orders for the masked
transforms for 32x32.
Make macro USE_MSKTX_FOR_32X32 1 in blockd.h to support 32x32 masked
transforms for ext-tx.
Change-Id: Ie6564830266651fcafae2d536c274dafd664ce17
Instead of using model_rd_for_sb() to estimate the cost and make the
decision on bmc/obmc, we use super_block_yrd/uvrd() to calculate and
compare the real rd costs of bmc and obmc.
Average bit-rate reduction(%) of obmc experiment:
derflr/derfhd/hevcmr/hevchd
2.353/TBD/TBD/TBD
Before the optimization, the coding gain was:
1.582/1.109/1.600/1.164
Note: there is still some mysterious bug because that compared to
the previous version, the performance at low bit rate drops a lot.
Change-Id: I8dbee04a272190f10516a3953c1ae690f8136766
This commit accounts for the context based probability model for
motion vector cost estimate in rate-distortion optimization.
Change-Id: Ia068a9395dcb4ecc348f128b17b8d24734660b83
This commit converts the scalar motion vector probability model
into vector format for later precise estimate.
Change-Id: I7008d047ecc1b9577aa8442b4db2df312be869dc
This fixes a bug in HBD sum of squared error computation introduced
in #abd00505d1c658cc106bad51369197270a299f92.
Change-Id: I9d4e8627eb8ea491bac44794c40c7f1e6ba135dc
