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 patch makes rd optimization use the same context for computing
the rate cost of coding the partitioning as the packer actually uses
when emitting it in write_modes_sb.
Change-Id: Idb1427bb2f9c37ab80c6aa182f7ff754ef0595cb
The value of use_highbitdepth flag is used for compute the size for
high bit depth buffer allocation, which should take value 0 or 1
depending on if the buffer is used for high bit depth or not.
Previously, the values is set to 8 or 0, this commit fixes the issue
and properly set the value for this flag to 1 or 0.
This cuts the size of highbitdepth buffer memory allocation to 2/9 of
the size prior to the fix.
Change-Id: I401518b5a6147e5d8a973e54f7ca6bc1892065e0
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
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
The definition is for the number of frames to check to determine the
recent decay rate, further to determine the next key frame in the
first pass of the encoder.
Change-Id: Ic696d6eb518a86fa296842273cf8767ef0b0e27a
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
Fixes assertion for football_422_4sif.y4m when supertx, var_tx and
ext_tx are all enabled. Problem was after subsampling, the u and v
blocks being encoded were no longer square.
Change-Id: Ie626f30a2e64538d33343a26d5124a79a6f2b985
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
