Preliminary tests indicated that these changes make cost_coeffs
approximately 20% faster which is a 2% improvement overall
Change-Id: Iaf013ba75884415cd824e98349f654ffb1c3ef33
This bug made the rd loop use one-side obmc (compound of the current
predictor and the predictors of the left mi's, while the above ones
are ignored by mistake) to determine whether to use obmc. This fix
improved the compression performance by ~0.6% on different test sets.
Coding gain (%) of obmc experiment on derflr/derfhd/hevcmr/hevchd:
1.568/TBD/1.628/TBD
Change-Id: I43b239bedf9a8eebfd02315b1b036e140a998140
Using this we can eliminate large numbers of calls to predict intra,
and is also faster than most of the variance functions it replaces.
This is an equivalence transform so coding performance is unaffected.
Encoder speedup is approx 7% when var_tx, super_tx and ext_tx are all
enabled.
Change-Id: I0d4c83afc4a97a1826f3abd864bd68e41bb504fb
In this experiment, an obmc inter prediction mode is enabled for
>= 8X8 inter blocks. When the obmc flag is on, the regular block-
based motion compensation will be refined by using predictors of
the above and left blocks.
Fixed some compatibility issues with vp9_highbitdepth, supertx,
ref_mv, and ext_interp.
Coding gain (%) on derflr/hevcmr/hevchd
OBMC:
1.047/1.022/0.708
OBMC + SUPERTX:
1.652/1.616/1.137
SUPERTX:
0.862/0.779/0.630
Change-Id: I5d8d3c4729c6d3ccb03ec7034563107893103b7f
Brings the following commits to vp10:
269428e Tie the bit cost scale to a define.
d13385c Switch to 9-bit rate cost constants built on a 256 probability denominator.
ad43a73 Fix a signed overflow in vp9 motion cost.
1c9b091 Fix some interger overflow errors
fac947d Restore previous motion search bit-error scale.
Change-Id: I598ba7ee7efcde18439c31dfa96b86cbf297a580
Setting FIXED_TX_TYPE as 1 makes the encoder skip tx_type search,
about twice as fast.
This speed feature is off by defualt; we can turn it on when we
want to quickly test new ideas.
Change-Id: Ieab5807d17fcd54fce3e8ae2f59a18b42eb79408
This commit aligns the rate-distortion metric for the recursive
transform block partitioning and the super transform. It resolves
the conflicts between these two experiments. The coding performance
gains of the combined experiments (var-tx + super-tx) has been
improved:
derf 0.89% -> 1.9%
hevcmr 1.06% -> 1.8%
stdhd 0.29% -> 1.4%
hevchr 0.80% -> 2.3%
Change-Id: I7e33994ad70c1b2751435620815f867d82172f41
These costs are added in separately just before the computed
ref_costs_* are added in the calling functions, so they were
effectively double counted.
Change-Id: Ic941d0243460cc2e750791cfc508e97d8b90e8fd
This commit enables entropy coding for dynamic reference motion
vector modes. The probability model is contexted on the ranking
categories of the reference motion vector candidates.
Change-Id: I09b58d98a409d63ec1a407331e29f8945b7ef17d
Fixes an issue where the tx_type was not set correctly for
sub8x8 inter and intra blocks. In the current syntax, for
sub8x8 blocks, there is still a single tx_type that is
transmitted. Ideally, this should be searched for the best
rd performance, albeit at the expense of encode speed.
For now, we just set it to DCT_DCT. Previously it was left
incorrectly as what was used for the previous non sub8x8
block.
derflr: BDRATE -0.277%
Change-Id: If76ba903bfbfd4d374cf1ac7d1daee50e92f0edd
This commit enables the dynamic reference motion vector coding mode
for the compound inter blocks.
Change-Id: Ibe78fd8de6989db392cd67a9d81a69d680345ba1
There were a number of compiler warnings:
1. int16_t to uint8_t in recon_intra.c;
2. double to float conversions in psnrhvs.c
3. intptr_t to int in quantize.c
4. size_t to int32_t in decoder.c
Change-Id: Id95423b17779dcfa6cf39d9a90fe8cb8b910f5df
Seperate the prediction angle search and fitler search.
It can reduce the computation overhead of filter search by as much
as 85%, while keeping more than 50% of the coding gain.
Change-Id: Id152f71e20ebcaca8b429bdd4ca1fbeb646fc6bf
BD-rate performance improvement (on top of ext-intra):
derflr 0.22%
hevclr 0.36%
hevcmr 0.48%
hevchr 0.37%
stdhd 0.19%
Average speed impact on some derf clips is about 40% slower (on
top of ext-intra). Speed improvment is a to-do.
Change-Id: I8fe3fe8c5e4f60d0462778adbcc15c84dfbe7a25
This commit generalizes dynamic reference motion vector coding mode
to support multiple candidate modes in the rate-distortion
optimization scheme and to support the selection in the bit-stream
syntax. The maximum number of modes allowed is currently limited to
4. The syntax elements for the dynamic reference motion vector
modes are using binary codes. The scheme supports single reference
frame.
It improves the compression performance
derf 0.135%
hevcmr 0.098%
Change-Id: Id053d6ce76e8365e52727bd0d12d28ce3de2e0e8
It makes the encoder accounts for the block zero-forcing operation
when optimizing the mode decisions.
Change-Id: I2c8e243756080b446b8a53a9679f75c4c47148cf
This commit allows an adaptive motion vector referencing mode
approach. It checks the available reference motion vector candidate
list and decides the amount of motion vector referencing modes. The
current implementation assumes simple binary coding for the syntax.
The compression performance is improved by
derf 0.11%
hevcmr 0.38%
stdhd 0.09%
hevchr 0.23%
The coding gains due to the new reference motion vector system are
derf 1.0%
hevcmr 1.7%
stdhd 1.4%
hevchr 1.3%
Change-Id: Idf932fc373546fe59c8741f1b933ff656e8dbc3f
Fixes integer pel MV usage for the sub8x8 case, which fixes a
rare mismatch issue.
Also adds some other minor missing code related to filter threshes.
Change-Id: I6b07e6cf9b287ba4b5bd6599af4a7412e50b3bdc
Reintroduce part of
Iaf2b717e6b8626b2b6a03226127221b776b49884
Which was later reverted in
I4c5b40ec63a6f19521191d3c730af87db3c4bc00
Change-Id: If3e5610ba3985ae7b4d952d8e616982465ac667a
Fixes some of the issues introduced by a merge from master.
derflr: -0.893% BDRATE
hevcmr: -1.667% BDRATE
Change-Id: I4c5b40ec63a6f19521191d3c730af87db3c4bc00
Combinations of different mv modes for two reference frames
are allowed in compound inter modes. 9 options are enabled,
including NEAREST_NEARESTMV, NEAREST_NEARMV, NEAR_NEARESTMV,
NEAREST_NEWMV, NEW_NEARESTMV, NEAR_NEWMV, NEW_NEARMV, ZERO_ZEROMV,
and NEW_NEWMV.
This experiment is mostly deported from the nextgen branch.
It is made compatible with other experiments
Coding gain of EXT_INTER(derflr/hevcmr/hevchd): 0.533%/0.728%/0.639%
Change-Id: Id47e97284e6481b186870afbad33204b7a33dbb0
This patch fixes a couple of issues caused by change-id:
I15d20ce5292b70f0c2b4ba55c1f1318181481596
Changes to the code for when the ext_tx experiment is not enabled
were merged from master but as var_tx does not exist on master
the changes had not been applied to the case when var_tx experiment
is enabled
Change-Id: Iaf2b717e6b8626b2b6a03226127221b776b49884
NEW2MV is enabled, representing a new motion vector predicted from
NEARMV. It is mostly ported from nextgen, where it was named
NEW_INTER.
A few fixes are done for sub8x8 RDO to correct some misused
mv references in the original patch.
A 'bug-fix' for encoding complexity is done, reducing the additional
encoding time from 50% to 20%. In sub8x8 case, the old patch
did motion search for every interpolation filter (vp9 only
searches once). This fix also slightly improves the coding gain.
This experiment has been made compatible with REF_MV and EXT_REFS.
Coding gain (derflr/hevcmr/hevchd): 0.267%/0.542%/0.257%
Change-Id: I9a94c5f292e7454492a877f65072e8aedba087d4
