1. 29 Mar, 2013 1 commit
  2. 28 Mar, 2013 7 commits
  3. 27 Mar, 2013 19 commits
  4. 26 Mar, 2013 13 commits
    • Deb Mukherjee's avatar
      Implicit weighted prediction experiment · 23144d23
      Deb Mukherjee authored
      Adds an experiment to use a weighted prediction of two INTER
      predictors, where the weight is one of (1/4, 3/4), (3/8, 5/8),
      (1/2, 1/2), (5/8, 3/8) or (3/4, 1/4), and is chosen implicitly
      based on consistency of the predictors to the already
      reconstructed pixels to the top and left of the current macroblock
      or superblock.
      
      Currently the weighting is not applied to SPLITMV modes, which
      default to the usual (1/2, 1/2) weighting. However the code is in
      place controlled by a macro. The same weighting is used for Y and
      UV components, where the weight is derived from analyzing the Y
      component only.
      
      Results (over compound inter-intra experiment)
      derf: +0.18%
      yt: +0.34%
      hd: +0.49%
      stdhd: +0.23%
      
      The experiment suggests bigger benefit for explicitly signaled weights.
      
      Change-Id: I5438539ff4485c5752874cd1eb078ff14bf5235a
      23144d23
    • Ronald S. Bultje's avatar
      Add col/row-based coefficient scanning patterns for 1D 8x8/16x16 ADSTs. · d9094d8f
      Ronald S. Bultje authored
      These are mostly just for experimental purposes. I saw small gains (in
      the 0.1% range) when playing with this on derf.
      
      Change-Id: Ib21eed477bbb46bddcd73b21c5c708a5b46abedc
      d9094d8f
    • Ronald S. Bultje's avatar
      Redo banding for all transforms. · 3120dbdd
      Ronald S. Bultje authored
      Now that the first AC coefficient in both directions use the same DC
      as their context, there no longer is a purpose in letting both have
      their own band. Merging these two bands allows us to split bands for
      some of the very high-frequency AC bands.
      
      In addition, I'm redoing the banding for the 1D-ADST col/row scans. I
      don't think the old banding made any sense at all (it merged the last
      coefficient of the first row/col in the same band as the first two of
      the second row/col), which was clearly an oversight from the band being
      applied in scan-order (rather than in their actual position). Now,
      coefficients at the same position will be in the same band, regardless
      what scan order is used. I think this makes most sense for the purpose
      of banding, which is basically "predict energy for this coefficient
      depending on the energy of context coefficients" (i.e. pt).
      
      After full re-training, together with previous patch, derf gains about
      1.2-1.3%, and hd/stdhd gain about 0.9-1.0%.
      
      Change-Id: I7a0cc12ba724e88b278034113cb4adaaebf87e0c
      3120dbdd
    • Ronald S. Bultje's avatar
      Use above/left (instead of previous in scan-order) as token context. · 790fb132
      Ronald S. Bultje authored
      Pearson correlation for above or left is significantly higher than for
      previous-in-scan-order (absolute values depend on position in scan, but
      in general, we gain about 0.1-0.2 by using either above or left; using
      both basically just makes this even better). For eob branch skipping,
      we continue to use the previous token in scan order.
      
      This helps about 0.9% on derf after re-training on a limited data set.
      Full re-training and results on larger-resolution clips are pending.
      
      Note that this commit breaks trellis, so we can probably get further
      gains out of it by fixing trellis at some later point.
      
      Change-Id: Iead68e296fc3a105cca746b5e3da9555d6010cfe
      790fb132
    • Deb Mukherjee's avatar
      Reoptimizing the interpolation filters · 57c97e2a
      Deb Mukherjee authored
      Reoptimizes the 8-tap smooth filter.
      
      Results:
      derf: +0.101%
      yt: +0.157%
      hd: +0.791%
      stdhd: +0.264%
      
      The next step will be to reoptimize the other two filters.
      
      Change-Id: I3d256a510ad9c7c30c33fae4a70fb43dfc708ed0
      57c97e2a
    • John Koleszar's avatar
      64661660
    • Dmitry Kovalev's avatar
      Cleaning up rate control code. · 77c664ad
      Dmitry Kovalev authored
      Lower case variable names, declaration and initialization on the same line,
      removing redundant casts to double.
      
      Change-Id: I7ea3905bed827aa6faac11a78401b85e448b57f9
      77c664ad
    • Dmitry Kovalev's avatar
      Cleaning up loopfilter code. · d7209b3a
      Dmitry Kovalev authored
      Lower case variable names, removing redundant variables, declaration and
      initialization on the same line.
      
      Change-Id: Ie0c6c95b14103990eb6a9d7784f8259c662e1251
      d7209b3a
    • Dmitry Kovalev's avatar
      Decomposition of vp9_decode_frame function. · 4a3d7860
      Dmitry Kovalev authored
      Moving code from vp9_decode_frame function into setup_loopfilter and
      setup_segmentation functions. A little bit of cleanup.
      
      Change-Id: I2cce1813e4d7aeec701ccf752bf57e3bdd41b51c
      4a3d7860
    • John Koleszar's avatar
    • John Koleszar's avatar
      Merge "Code cleanup." into experimental · 7d9a7fb2
      John Koleszar authored
      7d9a7fb2
    • John Koleszar's avatar
      Merge "Code cleanup." into experimental · f0923f3b
      John Koleszar authored
      f0923f3b
    • John Koleszar's avatar