At the edges of the picture only a subset of partitions are legal. Add
new contexts for these borders so they don't distort the probabilities of
the interior of the image where all partitions are legal.
Only include one context for each block size of each border direction
because so few blocks fall into these contexts to begin with.
objective-1-fast:
PSNR | PSNR Cb | PSNR Cr | PSNR HVS | SSIM | MS SSIM | CIEDE 2000
-0.0294 | -0.0911 | -0.2382 | -0.0481 | -0.0441 | -0.0450 | -0.0454
derf144: -0.135
lowres: -0.124
midres: -0.076
hdres: -0.078
Change-Id: I909b98eebb7e49273cde90154c8408febe334158
NCOBMC (non-causal obmc) allows overlapped prediction that takes
mvs from blocks at positions with non-causal relation (e.g. at the
bottom, or to the right) to the current block.
This experiment will be a sub-experiment of MOTION_VAR, so will only
be effective when MOTION_VAR is on.
Change-Id: Ie3aa9591e1c15f5cc251664ea3c146210a5010cf
This commit adds a new experiment to allow disabling of loop filtering
on tile boundaries. It is implemented by adding a syntax field
"loopfilter_across_tiles_enabled" into the uncompressed frame header.
If it is set to 0, decoder and encoder will disables loop filtering for
block edges that are also tile boundaries.
Change-Id: Ib80bfd82d49c74f1ba46ae18ceedb30704ac8aa5
This patch reverts ca4782bb: Disable daala_ec when ext_tile is enabled.
Certain tests in superframe_test.cc were disabled for only ans that
should have been disabled for both ans and daala_ec.
This was corrected in d526d0a8 and now the unit tests pass with
--enable-daala_ec and --enable-ext_tile.
Change-Id: I76244bb4d687040dbd504475c31361933830943d
Experiment ext_tile is not compatible with daala_ec yet, this commit
disables daala_ec and enable ans if ext_tile is enabled.
A follow-up commit should resolve the underline conflicts within
ext-tile experiment.
BUG=aomedia:116
Change-Id: If60cb170e908a844dc8d22efce82f2a2c01b391b
ext_tile is not compatible with reference_buffer, this commit changes
to disable refrence_buffer when ext_tile is enabled.
BUG=aomedia:114
Change-Id: I6416f4c731bec1c4cfeab3cdb539f359627ed2e2
entropy_stats: to generate stats of various symbols encoded
masked_tx: new experiemnt for coding a smaller transform in a
prediction block
Change-Id: I48baf0f1c37245c43031a9eda879ef49eee5e76b
intra-interp experiment allows intra prediction to use different
interpolation filters. It was part of the ext-intra in the nextgenv2
branch.
Change-Id: I27ab692494dc79bb92e457dbf9a72988577f1c6d
This commit adds an experiment to interleave the coding of transform
coefficients from YUV planes. The experiment can be enabled at config
time by --enable-coef-interleave.
Change-Id: Ifd92f9c367304bca9732f13fa026eb8996363677
The rans experiment is dead. The ans experiment with the ec_multisymbol
experiment also turned on takes its place.
Change-Id: Ie9f30ec7cf73aae6b2ea580a7b1f208485a8a7a7
PVQ replaces the scalar quantizer and coefficient coding with a new
design originally developed in Daala. It currently depends on the
Daala entropy coder although it could be adapted to work with another
entropy coder if needed:
./configure --enable-experimental --enable-daala_ec --enable-pvq
The version of PVQ in this commit is adapted from the following
revision of Daala:
fb51c1ade6
More information about PVQ:
- https://people.xiph.org/~jm/daala/pvq_demo/
- https://jmvalin.ca/papers/spie_pvq.pdf
The following files are copied as-is from Daala with minimal
adaptations, therefore we disable clang-format on those files
to make it easier to synchronize the AV1 and Daala codebases in the future:
av1/common/generic_code.c
av1/common/generic_code.h
av1/common/laplace_tables.c
av1/common/partition.c
av1/common/partition.h
av1/common/pvq.c
av1/common/pvq.h
av1/common/state.c
av1/common/state.h
av1/common/zigzag.h
av1/common/zigzag16.c
av1/common/zigzag32.c
av1/common/zigzag4.c
av1/common/zigzag64.c
av1/common/zigzag8.c
av1/decoder/decint.h
av1/decoder/generic_decoder.c
av1/decoder/laplace_decoder.c
av1/decoder/pvq_decoder.c
av1/decoder/pvq_decoder.h
av1/encoder/daala_compat_enc.c
av1/encoder/encint.h
av1/encoder/generic_encoder.c
av1/encoder/laplace_encoder.c
av1/encoder/pvq_encoder.c
av1/encoder/pvq_encoder.h
Known issues:
- Lossless mode is not supported, '--lossless=1' will give the same result as
'--end-usage=q --cq-level=1'.
- High bit depth is not supported by PVQ.
Change-Id: I1ae0d6517b87f4c1ccea944b2e12dc906979f25e
rd_debug is a debug tool aim at finding discrepancy between rate-distortion
loop and bitstream packing.
Change-Id: I751c4121516c5e6368668229c77778880a9dcb9d
This commit adds simp-mv-pred experiment. The experiment is to work on
top of ref-mv experiment to save memory bandwidth and reduce the size
of line buffer needed in ref-mv experiment.
When compared to ref-mv, this experiment showed:
low-delay BDR gain: 0.03%
High-delay BDR gain: 0.01%
memory/memory bandwidth saving: 40%
local memory/gate count saving: 20%
Change-Id: Ic4006e041fc58ede411da83d0d730c464ebe1749
The new ec_multisymbol experiment supersedes the rans experiment and is
used for multisymbol features that can be backed by either daala_ec or
rans.
This experiment is automatically enabled by ec_adapt and will try to
enable daala_ec or ans (in that order).
Change-Id: Ie75b4002b7a9d7f5f7b4d130c1aacb3dbe97e54f
This experiment performs symbol-by-symbol statistics
adaptation for non-binary symbols. It requires DAALA_EC or
RANS and ANS to be enabled. The adaptation is currently
based on a simple recursive filter and is taken from
Daala. It has an adaptation rate dependent on alphabet size,
taken from Daala. It applies wherever non-binary symbols
are encoded using Cumulative Probability Functions rather
than trees.
Where symbols are adapted, forward updates in the compressed
header are removed.
In the case of RANS coefficient token values are adapted,
with the exception of the zero token which remains a
binary symbol. In the case of DAALA_EC other values
such as inter and intra modes are adapted as CDFs are
provided in those cases.
The experiment is configured with:
./configure --enable-experimental --enable-daala-ec --enable-ec-adapt
or
./configure --enable-experimental --enable-ans --enable-rans \
--enable-ec-adapt
EC_ADAPT is not currently compatible with tiles.
BDR results on Objective-1-fast give a small loss:
PSNR YCbCr: 0.51% 0.49% 0.48%
PSNRHVS: 0.50%
SSIM: 0.50%
MSSSIM: 0.51%
CIEDE2000: 0.50%
Change-Id: I3888718e42616f3fd87144de7f125228446ac984
Also:
- For unsigned ints, don't check value >= 0 as that is always true.
- Add "-Wlogical-op" warning flag which would have warned that "logical
'or' of collectively exhaustive tests is always true" before this
patch.
Change-Id: Idf3bd312464397f2df19256fc69b22f345dc7753
This is a manual adaptation of the following commit from aom/master:
ce12003d60
The original commit message:
A tile group is a set of tiles in scan order.
Each tile group has a version of uncompressed and compressed headers,
identical apart from tile group parameters.
Encoding probability updates takes account of the number of
headers to control overheads.
The decoder supports arbitrary numbers of tile groups with
arbitrary number of tiles. The number of tiles in a TG is
signalled in the uncompressed header for that TG.
The encoder currently only supports a fixed number
of TGs (3, when error resilient mode is on) of equal size
(except possibly for the last one).
The average BDR performnce with 3 tile groups versus
anchor with error resilient mode and up to 16 tiles is:
NR YCbCr: 3.02% 3.04% 3.05%
PSNRHVS: 3.09%
SSIM: 3.06%
MSSSIM: 3.05%
CIEDE2000: 3.04%
Change-Id: I9b97c5ed733103b9160a3a5d4370de5322c00c0b
Purpose:
-Reduce dynamic range of interpolation filter coefficents from 8
bits to 7 bits.
-Inner product for 8-bit input data can be stored in a 16-bit signed
integer.
Impact on compression efficiency:
-Marginal improvement, typically less than 0.5% BDR.
Change-Id: I58d1408307ae7d2a6f9de8965c5877b258703199
* changes:
Palette: Use inverse_color_order to find color index faster.
Rewrite some loops to avoid -Wunsafe-loop-optimizations warnings.
Remove some useless casts
Add compiler warning flag -Wextra and fix related warnings.
Declare some array sizes to be constants (known at compile time).
Note: some of these warnings are enabled by a combination of -Wunused
(added earlier) and -Wextra.
Cherry-picked from aomedia/master: 4790a69
Change-Id: I322a1366bd4fd6c0dec9e758c2d5e88e003b1cbf
Cherry-picked from aomedia/master: 953f086c
Note: related fixes were already part of webm/nextgenv2.
Change-Id: I027a4f2a540af5a304b358ddbf293965b4211b9e
This commit changes to send frame size explicitly when
error_resilient_mode=1. Purpose is to allow parsing of bitstream
after a packet loss.
Change-Id: I7d1c010a465aa18914762cc1a3e61db377304c08
The (new) ans experiment replaces the bool coder with uABS bools. The
'rans' experiment adds multisymbol coding.
This matches the setup in aom/master.
Change-Id: Ida8372ccabf1e1e9afc45fe66362cda35a491222
* changes:
Fix warnings reported by -Wshadow: Part4: main directory
Fix warnings reported by -Wshadow: Part3: test/ directory
Fix warnings reported by -Wshadow: Part2b: more from av1 directory
Fix warnings reported by -Wshadow: Part2: av1 directory
Fix warnings reported by -Wshadow: Part1b: scan_order struct and variable
Fix warnings reported by -Wshadow: Part1: aom_dsp directory
Move STAT_TYPE enum to source file.
Code cleanup: mainly rd_pick_partition and methods called from there.
Alex Converse
Yue Chen
Zoe Liu
Angie Chiang
Ryan Lei
James Zern
Yaowu Xu
Thomas Davies
Nathan E. Egge
Debargha Mukherjee
Sarah Parker
hui su
zhipin deng
iole moccagatta
Jingning Han
Arild Fuldseth (arilfuld)
Yushin Cho
Urvang Joshi