Added a new expt rect-tx to be used in conjunction with ext-tx.
[rect-tx is a temporary config flag and will eventually be
merged into ext-tx once it works correctly with all other
experiments].
Added 4x8 and 8x4 tranforms for use initially with rectangular
sub8x8 y blocks as part of this experiment.
There is about a -0.2% BDRATE improvement on lowres, others pending.
When var-tx is on rectangular transforms are currently not used.
That will be enabled in a subsequent patch.
Change-Id: Iaf3f88ede2740ffe6a0ffb1ef5fc01a16cd0283a
-Fix some bugs in row_scan and col_scan. In some cases, the above
or left neighbor was not considered even though it is available.
-When above or left neighbor is not available, try using the
top-left, top-right or bottom-left neighbor.
Compression improvement:
lowres 0.20%
midres 0.16%
hdres 0.20%
Change-Id: If521665589c7f29277b8e9223f21f4a8bf3fef39
Makes a set of 16 transforms total, adding all 1D
combinations of ADST and FlipADST, and removng all DST
transforms.
lowres, midres both improve by about 0.1% and hdres by
-0.378% in BDRATE but with fewer transforms that are also
simpler.
Further experiments to continue later.
Change-Id: I7348a4c0e12078fdea5ae3a2d36a89a319ffcc6e
This commit enables the 1-D transform to use Manhattan grid vertical
and horizontal scan order for transform coefficient entropy coding.
Enabled in inter prediction mode, the hybrid 1D/2D transform coding
scheme outperforms the 2D-DCT based coding system used in VP9 by
lowres_all 1.7%
hdres_all 1.4%
As one coding option, in addition to the existing 17 other transform
types in ext-tx experiment, the 1D/2D hybrid transform improves
the coding gains:
lowres_all 2.2% -> 3.0%
Change-Id: I9cefa9d9e38224546d0afd67feecd9f8d4a16ab0
This commit enables a hybrid 1-D/2-D transform coding scheme and
the accompany entropy coding system. It currently uses hybrid
1-D/2-D DCT transform coding. It provides coding performance gains:
lowres_all 0.55%
hdres_all 0.43%
Change-Id: I2b30dcafd21eb2bb3371f6e854cbab440a4dfa78
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
1) copy following files from vpx_dsp/ to vp10/common/
vp10_inv_txfm.c
vp10_inv_txfm.h
vp10_inv_txfm_sse2.c
vp10_inv_txfm_sse2.h
2) change the function prefix "vpx_" to "vp10_" in above files
3) add unit test at vp10_inv_txfm_test.cc
Change-Id: I206f10f60c8b27d872c84b7482c3bb1d1cb4b913
Creates new hybrid transforms combining symmetric DST with
ADST and DCT. Thus a total of 16 transforms are supported.
derfl: +1.659% (up about 0.2%)
Change-Id: Idde1cecdb59527890bf05da740099c3f6a5b9764
Does not include DST1 yet.
derflr: +1.437 (8-bit internal), +7.243 (12-bit internal)
with --enable-ext-tx
Change-Id: I91f1759fd2de794755eb6384cda52e80e979cb7d
