1. 17 Oct, 2017 1 commit
  2. 16 Oct, 2017 3 commits
  3. 13 Oct, 2017 1 commit
  4. 12 Oct, 2017 1 commit
    • Yue Chen's avatar
      filter_intra: make fi mode index entropy coded · 63ce36fc
      Yue Chen authored
      Make fi mode index entropy coded instead of using raw bits. Mode
      cost estimation in key-frame RDO is updated as well. Modification
      to inter frame RDO is not included in this patch.
      Also key-frame y mode cdf table is re-trained since fi modes are
      attached to DC_PRED
      
      Key frame BDRate:
      -0.399% lowres, -0.339% midres
      
      Change-Id: I9ccf478b0a2e48fb1870fe8451e45e2c858a5f63
      63ce36fc
  5. 11 Oct, 2017 1 commit
    • Cheng Chen's avatar
      Train LPF_SB cdf · 855f0fc7
      Cheng Chen authored
      Count filter level reuse, sign, and delta. And use counts to train
      default cdfs.
      Default cdf tables updated.
      
      Change-Id: If4fbf3e06ec7d568d940ca7b170bbbb4b778f176
      855f0fc7
  6. 10 Oct, 2017 1 commit
    • Lester Lu's avatar
      lgt-from-pred: transforms based on prediction · 432012f6
      Lester Lu authored
      In this experiment, sharp image discontinuity in the predicted
      block is detected. Based on this discontinuity, we choose
      particular LGTs as row and column transforms.
      
      Bitstream syntax, entropy coding, and RD search for LGT are added.
      One binary symbol is used to signal whether LGT is used. This
      experiment can work independently with the lgt experiment.
      
      lowres: -0.414% for key frames, -0.151% overall
      midres: -0.413% for key frames, -0.161% overall
      
      Change-Id: Iaa2f2c2839c34ca4134fa55e77870dc3f1fa879f
      432012f6
  7. 08 Oct, 2017 1 commit
  8. 06 Oct, 2017 1 commit
    • Jingning Han's avatar
      Rework key frame intra mode context model · a45d842d
      Jingning Han authored
      Reduce the context model size for key frame modes from 30240 bits
      to 4500 bits, i.e., less than 1/6 of the original context model.
      The coding performance loss on key frame is 0.14% for lowres and
      noise level difference for video sequence. The loss on key frame
      for midres is 0.05% and noise level for whole video. The change
      on hdres kf coding is 0.015%.
      
      Change-Id: I9e36825e5c5ee6ba35038c3ca349ad1ad3429910
      a45d842d
  9. 05 Oct, 2017 2 commits
  10. 04 Oct, 2017 2 commits
    • Zoe Liu's avatar
      Unify default probs for reference frame coding · e3c476e5
      Zoe Liu authored
      No performance change for scenario --disable-ext-comp-refs. For
      --enable-ext-comp-refs, a pretty tiny bitrate saving was resulted
      (-0.01~-0.02%).
      
      Change-Id: I7d12b28408bbfecc762108cbcf186b2a6ea07253
      e3c476e5
    • Cheng Chen's avatar
      LOOPFILTER_LEVEL: add flexibility for EXT_DELTA_Q · 880166ab
      Cheng Chen authored
      When experiment LOOPFILTER_LEVEL is on, there're four base filter levels
      for each frame. This patch enables one to use one delta or four deltas
      to update corresponding filter levels for each superblock in
      EXT_DELTA_Q.
      
      1 bit per frame is sent through bitstream to select one or four deltas.
      Now, we hard code to use one delta.
      
      Change-Id: I9c61a035064fa81878b0575ad21664e2b22a6a45
      880166ab
  11. 03 Oct, 2017 3 commits
    • Hui Su's avatar
      Remove symbol mapping of intra modes · 814f41e7
      Hui Su authored
      The _ind and _inv mapping tables are not necessary. The CDF tables are
      updated with new values converted from the old tables. Performance
      impact is small and neutral.
      
      Change-Id: I65845ab3c80f88794abd9ab9e61494af56099c7c
      814f41e7
    • Urvang Joshi's avatar
      TX_64x64: Optimized default_txfm_partion tables. · 886bfc7b
      Urvang Joshi authored
      The probabilities and CDFs were tuned using aom_entropy_optimizer tool.
      
      midres: -0.062 overall PSNR, -0.100 on SSIM
      (but significant gain on Keiba_832x480_30.y4m clip:
      -1.331 on overall PSNR and -1.903 on SSIM)
      lowres: +0.013 on overall PSNR, -0.062 on SSIM
      
      Change-Id: Ie143a3914ef45939c8744ff6b2ed9f1d0a59353e
      886bfc7b
    • Cheng Chen's avatar
      Make LOOPFILTER_LEVEL support EXT_DELTA_Q · a97394f7
      Cheng Chen authored
      Before LOOPFILTER_LEVEL, there's one filter level,
      now we have four filter levels for y plane vertical,
      y plane horizontal, u plane and v plane.
      
      This patch enables experiment LOOPFILTER_LEVEL to support per
      superblock loop filter level update.
      
      Change-Id: Ib11a1564471eb3076c26e73e5cdf7b5a3045ef97
      a97394f7
  12. 02 Oct, 2017 2 commits
    • Sebastien Alaiwan's avatar
      Remove compile guards for CONFIG_EXT_INTER · 0bdea0d8
      Sebastien Alaiwan authored
      This experiment has been adopted, we can simplify the code
      by dropping the associated preprocessor conditionals.
      
      Change-Id: Ic077963f72e8cc2ae9872b58c8a0241988384110
      0bdea0d8
    • Urvang Joshi's avatar
      Remove tx_size probability tables. · 355a7a71
      Urvang Joshi authored
      tx_size is transmitted using CDFs now, so these tables are obsolete.
      
      Also, remove a related tx_size_totals table.
      
      Change-Id: I949b46c1c9499bc556e68c77adbdb5aa3288c9a2
      355a7a71
  13. 30 Sep, 2017 1 commit
    • Zoe Liu's avatar
      Update default probs for reference frame coding · 6905dc79
      Zoe Liu authored
      The updates in this CL are for the scenario when ext-comp-refs is off.
      
      For --disable-global-motion --disable-ext-tx --disable-ext-comp-refs
      --disable-convolve-round, the patch obtains a small BDRate gain for
      PSNR: lowres -0.08%; midres -0.05%
      
      Change-Id: I47d1ba93318e2904b5714f62ffd6af056f4eb588
      6905dc79
  14. 29 Sep, 2017 2 commits
  15. 28 Sep, 2017 3 commits
  16. 23 Sep, 2017 1 commit
  17. 22 Sep, 2017 2 commits
    • Hui Su's avatar
      Remove probablity model for tx type · 98b0b3e9
      Hui Su authored
      It's not being used anymore, replaced by the CDF model.
      The counters are moved under the entropy-stats experiment, so that they
      can be used to tune the default CDF values.
      
      Change-Id: I50cb170c4c8699cf7317fd77853b3fedf2342d3e
      98b0b3e9
    • Hui Su's avatar
      Refactor the ext-tx experiment · ddbcde28
      Hui Su authored
      Use common structure for inter and intra tx type information when
      possible.
      
      Change-Id: I1fd3bc86033871ffbcc2b496a31dca00b7d64b31
      ddbcde28
  18. 16 Sep, 2017 1 commit
    • Hui Su's avatar
      intrabc: replace prob with cdf · 6c8584f6
      Hui Su authored
      Improves keyframe coding by 0.1% on the screen_content testset.
      
      Change-Id: I5793a67eaae21010ef200038af99ebb9029fc770
      6c8584f6
  19. 10 Sep, 2017 2 commits
    • Jingning Han's avatar
      Rework base range entropy coding in level map system · 87b01b5a
      Jingning Han authored
      Replace the truncated geometric distribution model with the grouped
      leaves structure for more efficient probability modeling.
      Each group has its own Geometric distribution
      
      This give us 0.2% gain on lowres
      
      Change-Id: If5c73dd429bd5183a8aa81042f8f56937b1d8a6a
      87b01b5a
    • Angie Chiang's avatar
      Re train nz_map prob · 698a6185
      Angie Chiang authored
      We got 0.07% gain on lowres
      
      Change-Id: I0aef14d16025d9933ec3d3b71086f3f55c81df66
      698a6185
  20. 09 Sep, 2017 1 commit
  21. 07 Sep, 2017 1 commit
  22. 05 Sep, 2017 1 commit
  23. 02 Sep, 2017 1 commit
  24. 01 Sep, 2017 1 commit
  25. 31 Aug, 2017 1 commit
    • Angie Chiang's avatar
      Use 7 neighbors for nz_map ctx · 2b38deff
      Angie Chiang authored
      This will let coding performance drop slightly
      lowres 0.093%
      
      Increase encoder speed by 24%
      
      Reduce nz_map's context size by 20%
      
      Change-Id: I871c18a7e0341e066afc334556b9998194b3f8c9
      2b38deff
  26. 30 Aug, 2017 1 commit
  27. 25 Aug, 2017 1 commit
    • Rupert Swarbrick's avatar
      Add support for 16x4 partitions · 6a93b155
      Rupert Swarbrick authored
      When updating default_partition_cdf, this sums the probabilities that
      were divided evenly across the pairs PARTITION_HORZ_A/PARTITION_HORZ_B
      and PARTITION_VERT_A/PARTITION_VERT_B. Those summed probabilities now
      get distributed evenly across the triples you get by adding
      PARTITION_HORZ_4 and PARTITION_VERT_4, respectively.
      
      Rather than implement 2X8/8X2 blocks for now, ss_size_lookup returns
      4X8/8X4 block sizes to use as chroma transform sizes for 4X16/16X4
      blocks.
      
      The changes in setup_pred_plane and set_skip_context are because this
      is presumably the first time we've had to deal with 16x4 or 4x16
      blocks. Since BLOCK_16X4 is not less than BLOCK_8X8, the existing
      logic didn't work (and the "shuffle back one" logic should probably be
      done for small widths and heights separately).
      
      Change-Id: If28d8954da42d6c726f2bcce2cb5242154b0870c
      6a93b155
  28. 23 Aug, 2017 1 commit