Implements a first version of global motion where the
existing ZEROMV mode is converted to a translation only
global motion mode.
A lot of the code for supporting a rotation-zoom affine
model is also incorporated.
WIP.
Change-Id: Ia1288a8dfe82f89484d4e291780288388e56d91b
This is a combination of:
4a19fa6 Added sse2 acceleration for highbitdepth variance
c6f5d3b Fix high bit depth assembly function bugs
Change-Id: I446bdf3a405e4e9d2aa633d6281d66ea0cdfd79f
This change is made in preparation for a
subsequent patch which adds acceleration
for the highbitdepth transform functions.
The highbitdepth transform functions attempt
to use 16/32bit sse instructions where possible,
but fallback to using the C implementations if
potential overflow is detected. For this reason
the dct routines are made global so they can be
called from the acceleration functions in the
subsequent patch.
Change-Id: Ia921f191bf6936ccba4f13e8461624b120c1f665
vp9_quantize_rect did illegal shifts but didn't use the results.
The shift |a << b| is unfortunately undefined if |a < 0|, but the
more verbose |a * (1 << b)| generates the same machine code.
Change-Id: I7ceac66fa20a700630cf8ed008949146b161dab4
Do not treat first element (dc) differently.
on screen_content
tx-skip only: +16.4% (was +15.45%)
no significant impact on natrual videos
Change-Id: I79415a9e948ebbb4a69109311c10126d8a0b96ab
palette expt: correctly update color buffer
intrabc expt: update zcoeff_blk so that residue coding will not
be mistakenly skipped
Change-Id: I870f5b742c2ac394f4c871aa65e6591e293d8ef6
Changes include:
* Uses double for RD cost computation to guard against overflow
for large resolution frames.
* Use previous frame's filter level to code the level better.
* Change precision of the filter parameters.
* Allow spatial variance for x and y to be different
Change-Id: I1669f65eb0ab1e8519962954c92d59e04f1277b7
derflr: +0.556% (a little up from before)
Use raster scan order for non-transform blocks
+15.45% (+2.1%) on screen_content
no significant change on natural videos
Change-Id: I0e264cb69e8624540639302d131f7de9c31c3ba7
Adds an internal buffer in the encoder to store the deblocked
result to help speed up the search for the best bilateral filter.
Very small change in performance but a lot faster:
derflr: +0.518%
Change-Id: I5d37e016088e559c16317789cfb1c2f49334b2b9
+0.3% on 10-bit
+0.3% on 12-bit
With other high bit compatible experiments on 12-bit
+12.44% (+0.17) over 8-bit baseline
Change-Id: I40b4c382fa54ba4640d08d9d01950ea8c1200bc9
Adds a framework to incorporate a parameterized loop
postfilter in the coding loop after the application of the
standard deblocking loop filter.
The first version uses a straight bilateral filter
where the parameters conveyed are just spatial and
intensity gaussian variances.
Results on derflr:
+0.523% (only with this experiment)
+6.714% (with all expts other than intrabc)
Change-Id: I20d47285b4d25b8c6386ff8af2a75ff88ac2b69b
This patch allows the prediction residues of tx-skipped blocks
to use probs that are different from regular transfrom
coefficients for token entropy coding. Prediction residues are
assumed as in band 6.
The initial value of probs is obtained with stats from limited
tests. The statistic model for constrained token nodes has not
been optimized. The probs for token extra bits have not been
optimized. These can be future work.
Certain coding improvment is observed:
derflr with all experiments: +6.26% (+0.10%)
screen_content with palette: +22.48% (+1.28%)
Change-Id: I1c0d78178ee9f3655febb6f30cdaef8ee9f8e3cc
This experiment, referred as NEWMVREF, also merged with NEWMVREF_SUB8X8
and the latter one has been removed. Runborgs results show that:
(1) Turning on this experiment only, compared against the base:
derflf: Average PSNR 0.40%; Overall PSNR 0.40%; SSIM 0.35%
(2) Turning on all the experiments including this feature, compared against
that without this feature, on the highbitdepth case using 12-bit:
derflf: Average PSNR 0.33%; Overall PSNR 0.32%; SSIM 0.30%.
Now for highbitdepth using 12-bit, compared against base:
derflf: Average PSNR 11.12%; Overall PSNR 11.07%; SSIM 20.27%.
Change-Id: Ie61dbfd5a19b8652920d2c602201a25a018a87a6
The basic idea is to use a pixel’s neighboring colors as
context to predict its own color. Up to 4 neighbors are
considered here: left, left-above, above, right-above.
To reduce the number of contexts, the combination of any
4 (or less) colors are mapped to a reduced number of
patterns. For example, 1111, 2222, 3333, … , can be mapped
to the same pattern: AAAA. SImilarly, 1122, 1133, 2233, …,
can be mapped to the pattern AABB. In this way, the total
number of color contexts is reduced to 16.
This almost doubles the gain of palette coding on screen
content videos.
on screen_content
--enable-palette +14.2%
--enable-palette --enable-tx-skip +21.2%
on derflr
--enable-palette +0.12%
with all other experiments +6.16%
Change-Id: I560306dae216f2ac11a9214968c2ad2319fa1718
Also make changes to transmit palette-enabled flag using
neighbor blocks as context.
on screen_content
--enable-palette +7.35%
on derflr
with all other experiments +6.05%
Change-Id: Id6c2f726d21913d54a3f86ecfea474a4044c27f6
on screen_content
--enable-palette +6.74%
on derflr
with all other experiments +6.02%
(--enable-supertx --enable-copy-mode
--enable-ext-tx --enable-filterintra
--enable-tx64x64 --enable-tx-skip
--enable-interintra --enable-wedge-partition
--enable-compound-modes --enable-new-quant
--enable-palette)
Change-Id: Ib85049b4c3fcf52bf95efbc9d6aecf53d53ca1a3
This framework allows lower quantization bins to be shrunk down or
expanded to match closer the source distribution (assuming a generalized
gaussian-like central peaky model for the coefficients) in an
entropy-constrained sense. Specifically, the width of the bins 0-4 are
modified as a factor of the nominal quantization step size and from 5
onwards all bins become the same as the nominal quantization step size.
Further, different bin width profiles as well as reconstruction values
can be used based on the coefficient band as well as the quantization step
size divided into 5 ranges.
A small gain currently on derflr of about 0.16% is observed with the
same paraemters for all q values.
Optimizing the parameters based on qstep value is left as a TODO for now.
Results on derflr with all expts on is +6.08% (up from 5.88%).
Experiments are in progress to tune the parameters for different
coefficient bands and quantization step ranges.
Change-Id: I88429d8cb0777021bfbb689ef69b764eafb3a1de
