1. 06 Feb, 2017 1 commit
    • Alex Converse's avatar
      ec_multisymbol: Split off new new_tokenset experiment · a9598cd6
      Alex Converse authored
      The new_tokenset experiment replaces the unconstrained tokenset with a
      multisymbol alphabet in an inventive way.
      
      Tested configurations:
      new_tokenset + ec_adapt, new_tokenset, ec_multisymbol
      
      Change-Id: I846ab2e51c2a1dc3f2f9904ed8c47a8e98f853c5
      a9598cd6
  2. 04 Feb, 2017 1 commit
  3. 03 Feb, 2017 5 commits
  4. 01 Feb, 2017 1 commit
    • David Barker's avatar
      Fix encode/decode mismatches for supertx + delta-q · 3aec8d6c
      David Barker authored
      This fixes the following mismatch bugs:
      * At the bitstream level, the decoder would not read the delta_qindex
        information for supertx blocks, but the encoder always sent it,
        leading to the encoder and decoder becoming misaligned.
        The delta_qindex information is still required for supertx blocks,
        so change the decoder to read it.
      * In addition, the quantizer was not properly adjusted for supertx
        blocks at the decoder. We copy the quantizer setup code from
        non-supertx blocks.
      
      Since this does not change the encoder, it should not have any
      quality impact.
      
      Change-Id: I9a0f79c3aa66f2a5a353821e2a6f3b526636e7b4
      3aec8d6c
  5. 31 Jan, 2017 2 commits
  6. 27 Jan, 2017 1 commit
  7. 26 Jan, 2017 1 commit
    • ltrudeau's avatar
      Convert PVQ skip variable to enum · e1c0929f
      ltrudeau authored
      Creates the PVQ_SKIP_TYPE enum to encapsulate the different types of
      skipping that can be signaled by PVQ (i.e. skip: AC, DC or both).
      
      There is no impact on the bitstream. However, the decoder will now emit
      an internal error if the decoded skip flag is out of range. The
      block_skip variable is also renamed to ac_dc_coded as it stores the same
      information.
      
      Change-Id: Ib2aadaf99dc1736ea392ae5ed8948c3cdc12da9b
      e1c0929f
  8. 25 Jan, 2017 1 commit
    • hui su's avatar
      Cleanup for the entropy experiment · 0161a932
      hui su authored
      Minor performance changes
      0.03% better on lowres
      0.01% better on midres
      
      Change-Id: I7a7168f3a2a4d17a03353841a416eff6edf1e241
      0161a932
  9. 24 Jan, 2017 1 commit
    • David Barker's avatar
      Make ext-inter use new rectangular intra predictor · 839467f4
      David Barker authored
      Now that https://aomedia-review.googlesource.com/#/c/6729/
      has been merged, build_intra_predictors_for_interintra() is
      now redundant, so replace it by a direct call to
      av1_predict_intra_block() and remove the old function.
      
      Reset rect_interintra back to 1.
      
      To do this, we need to make the intra predictor take a
      BLOCK_SIZE instead of a TX_SIZE. This is because we need to
      be able to predict 32x64 and 64x32 blocks, but there is no
      TX_32X64 or TX_64X32.
      
      No effect on output or performance.
      
      Change-Id: I8c185a211c97a85012cc54ec293c785a693608ed
      839467f4
  10. 23 Jan, 2017 2 commits
    • Fangwen Fu's avatar
      enable explicit temp mv prediction signaling · 8d164de2
      Fangwen Fu authored
      Change-Id: Ieb2922c3df4ef4f8514b8a6df6f9a8fc45ef3cf4
      8d164de2
    • Yushin Cho's avatar
      Add a new experiment, DAALA_DIST · 7a428ba2
      Yushin Cho authored
      This commit adds a new experiment, Daala's distortion function,
      which is designed to better approximate perceptual distortion
      in 8x8 pixel blocks.
      
      This experiment is expected to work best with PVQ.
      
      It measures the variance of overlapped 4x4 regions in the 8x8 area,
      then uses these variances to scale the MSE of weighted frequency domain
      distortion of 8x8 block.
      
      Since AV1 calculates distortion in blocks as small as 4x4, it is not possible to
      directly replace the existing distortion functions of AV1,
      such as dist_block() and block_rd_txf().
      Hence, there has been substantial changes in order to apply
      Daala's 8x8 distortion function.
      The daala distortion function is applied
      after all 4x4 tx blocks in a 8x8 block are encoded (during RDO),
      as in below two cases:
      1) intra/inter sub8x8 predictions and
      2) 4x4 transform with prediction size >= 8.
      
      To enable this experiment, add '--enable-daala-dist' with configure.
      
      TODO: Significant tuning of parameters is required since the function has
      originally came from Daala thus most parameters would not work
      correctly outside Daala.
      The fact that chroma distortion is added to the distortion of AV1's RDO is
      also critical since Daala's distortion function is applied to luma only
      and chroma continues to use MSE.
      
      Change-Id: If35fdd3aec7efe401f351ba1c99891ad57a3d957
      7a428ba2
  11. 21 Jan, 2017 1 commit
    • Jingning Han's avatar
      Make adapt-scan support rectangular transform block sizes · 758b2ceb
      Jingning Han authored
      This commit enables the adaptive scan order system support
      rectangular trnasform block sizes. It resolves the coding failure
      when rect-tx or var-tx are enabled.
      
      BUG=aomedia:143
      
      Change-Id: Ic565284e811e3f7e0ebf2e08fb3748257ce8a049
      758b2ceb
  12. 20 Jan, 2017 2 commits
  13. 19 Jan, 2017 4 commits
  14. 18 Jan, 2017 3 commits
    • Yue Chen's avatar
      Add rd loop of NCOBMC · f27b1605
      Yue Chen authored
      At the final round of encoding of each superblock, will go through
      each prediction block to check if ncobmc mode is better than non-
      overlapped prediction. Note that causal obmc mode is dumped here.
      
      PSNR gain (MOTION_VAR + NCOBMC): -2.845% lowres
      
      Change-Id: Ibe504f7f1882446a08ba426e1e9824bca73bf655
      f27b1605
    • Urvang Joshi's avatar
      Enable rectangular transforms for Intra also. · feb925fe
      Urvang Joshi authored
      These are under EXT_TX + RECT_TX experiment combo.
      
      Results
      =======
      
      Derf Set:
      --------
      All Intra frames: 1.8% avg improvement (and 1.78% BD-rate improvement)
      Video: 0.230% avg improvement (and 0.262% BD-rate improvement)
      
      Objective-1-fast set
      --------------------
      Video: 0.52 PSNR improvement
      
      Change-Id: I1893465929858e38419f327752dc61c19b96b997
      feb925fe
    • Alex Converse's avatar
      Add unpoison_partition_ctx experiment · 55c6bdeb
      Alex Converse authored
      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
      55c6bdeb
  15. 13 Jan, 2017 1 commit
    • Yue Chen's avatar
      Separate mbmi coding and coeff coding+recon at sb level in NCOBMC · 9ab6d71f
      Yue Chen authored
      In order to use mvs from a future block in obmc, we first send mbmi
      info for the entire superblock, and then call another recursion to
      handle the coeffs and recon.
      
      Note: this change is currently not compatible with SUPERTX, later I
      will move detoken and recon for supertx to a proper place
      
      Change-Id: I19ab77fa137f53a370e68ea777f70d0306e3e303
      9ab6d71f
  16. 12 Jan, 2017 1 commit
    • Yue Chen's avatar
      Refactor write_modes_b() and decode_block() · 64550b6a
      Yue Chen authored
      In order to reduce the code complexity for handling parameter
      coding and recon separately for each 64x64 in non-causal obmc
      experiment, we break them down to two steps calling separate
      functions, one for params, the other dealing with coefficients
      and recon(decoder side).
      Note: actually the non-causal prediction can use the original
      syntax, but right now in the decoder coeff detoken and recon are
      heavily nested.
      
      Change-Id: I72d9c42ab8f38b57850d6b0481551893f1702822
      64550b6a
  17. 11 Jan, 2017 1 commit
  18. 10 Jan, 2017 1 commit
    • Nathan E. Egge's avatar
      Use aom_reader with od_decode_cdf_adapt(). · f25bae44
      Nathan E. Egge authored
      Change the od_decode_cdf_adapt() function to take an aom_reader
       struct instead of an od_ec_dec struct.
      Rename od_decode_cdf_adapt() to aom_decode_cdf_adapt().
      
      Change-Id: I0713d2f56acfea3f67f1b4087c0feee77c2e25cb
      f25bae44
  19. 09 Jan, 2017 2 commits
  20. 06 Jan, 2017 2 commits
    • Jingning Han's avatar
      Refactor var-tx pipeline to support cb4x4 mode · 9ca05b7e
      Jingning Han authored
      Replace hard coded 4x4 transform block step size assumption with
      scalable table access.
      
      Change-Id: Ib1cc555c2641e5634acdd91ca33217f00aeb0b89
      9ca05b7e
    • Debargha Mukherjee's avatar
      Add UV wiener loop restoration · a43a2d98
      Debargha Mukherjee authored
      Enables Wiener based loop restoration only for the UV
      frames. The selfguided and domaintranform filters do not
      work very well for UV components, hence they are disabled.
      For each UV frame a single set of wiener parameters are
      sent. They are applied tile-wise, but all tiles use the
      same parameters.
      
      BDRATE (Global PSNR) results:
      -----------------------------
      lowres: -1.266% (up from -0.666%, good improvement)
      midres: -1.815% (up from -1.792%, tiny improvement)
      
      Tiling on UV components will be explored subsequently.
      
      Change-Id: Ib5be93121c4e88e05edf3c36c46488df3cfcd1e2
      a43a2d98
  21. 05 Jan, 2017 3 commits
  22. 04 Jan, 2017 3 commits
    • Angie Chiang's avatar
      Remove fwd_txfm_opt · 2cc057cf
      Angie Chiang authored
      This CL aims at simplify transform code.
      
      Change-Id: Ibaf1dd8607e37d44a0f77788a72e344583f81fa0
      2cc057cf
    • Angie Chiang's avatar
      Remove speed feature use_lp32x32fdct · 8fd2d7aa
      Angie Chiang authored
      Change-Id: I6ce654b582f2a9d45a40bf22ba597b47d418a0be
      8fd2d7aa
    • Ryan Lei's avatar
      Add an experiment to disable lpf on tile boundaries · 7386eda0
      Ryan Lei authored
      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
      7386eda0