1. 18 Jan, 2017 1 commit
    • 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
  2. 04 Jan, 2017 2 commits
    • Jingning Han's avatar
      Enable cb4x4 mode support to ext-tx experiment · 1a00cffd
      Jingning Han authored
      This commit enables the cb4x4 mode to support ext-tx experiment. The
      coding performance gains are:
      
             ext-tx   cb4x4    ext-tx + cb4x4
      lowres  2.7%     2.6%      4.9%
      midres  2.1%     1.2%      3.0%
      
      Change-Id: I6c566b6073527262abcdbb1a0c6bcb8729988f3b
      1a00cffd
    • 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
  3. 21 Dec, 2016 1 commit
  4. 14 Dec, 2016 1 commit
  5. 12 Dec, 2016 1 commit
    • Debargha Mukherjee's avatar
      Replace bilateral filter with domain transform RF · 0e67b25c
      Debargha Mukherjee authored
      The main objective is to reduce computational complexity.
      The domain transform filter has an effect of edge preserving smoothing
      at a lower computational cost than the bilateral filter, and can be
      readily paralelized.
      
      A little drop in coding efficiency about 0.06% for lowres, 0.16% for
      midres.
      
      Change-Id: Id949406b7e5afe9b64588d130065c63a76e4f3f9
      0e67b25c
  6. 10 Dec, 2016 1 commit
  7. 06 Dec, 2016 2 commits
  8. 02 Dec, 2016 2 commits
  9. 01 Dec, 2016 1 commit
    • Jingning Han's avatar
      Add 2x2 block unit syntax · f1702dde
      Jingning Han authored
      Add 2x2 block size syntax to the codec system. It prepares for the
      4x4 coding block unit for 420 format. This change retains the same
      coding statistics.
      
      Change-Id: If8e9a31bd6b4b75bc994539dc4dd8021d455ba57
      f1702dde
  10. 30 Nov, 2016 1 commit
  11. 28 Nov, 2016 1 commit
    • Urvang Joshi's avatar
      Add a new intra prediction mode "smooth". · 6be4a54b
      Urvang Joshi authored
      This is added as part of ALT_INTRA experiment.
      
      This uses interpolation between top row and estimated bottom row; as
      well as left column and estimated right column to generate the
      predicted block.The interpolation is done using a predefined weight
      array.
      
      Based on experiments, the currently chosen weight array was created
      to represent a quadratic curve, but can be tuned further if needed.
      
      Improvement from baseline on Derf set:
      ALL Keyframes: 1.279%
      
      Improvement from existing ALT_INTRA:
      ALL Keyframes: 1.146%
      
      Change-Id: I12637fa1b91bd836f1c59b27d6caee2004acbdd4
      6be4a54b
  12. 18 Nov, 2016 2 commits
    • Debargha Mukherjee's avatar
      Various table updates to support 64x64 transforms · 18d38f6c
      Debargha Mukherjee authored
      Includes:
      Various table updates and fixes to support 64x64 transforms.
      Entropymode updates to support tx_size expansion to 64x64.
      tx_mode changes to support an ALLOW_64sXx64 transform mode.
      
      Change-Id: Ib9098cfe27d0c015fe3be6ae13e7d09576771b9e
      18d38f6c
    • Debargha Mukherjee's avatar
      Add default 64x64 scan orders and entropy models · 153e1f86
      Debargha Mukherjee authored
      Adds 64x64 default scan orders
      Adds 64x64 coefficient entropy models (just copy the 32x32 ones)
      Entropy context updates for 64x64 transform
      Various misc. changes to support 64x64 transforms
      
      Change-Id: I2c0bc4ba540886dd196e87a78b205407ad3e866b
      153e1f86
  13. 11 Nov, 2016 1 commit
    • Sarah Parker's avatar
      Add ability to have multiple compound modes for interinter · 6fddd18f
      Sarah Parker authored
      This is currently just a refactor and creates no change in performance.
      It allows new compound types to be added easily in the future to
      facilitate experiments with segmentation masks.
      
      Change-Id: If48fed216d482454fabb45a304b4220ada0dbdee
      6fddd18f
  14. 10 Nov, 2016 1 commit
  15. 03 Nov, 2016 1 commit
  16. 02 Nov, 2016 1 commit
    • Jingning Han's avatar
      Simplify tx_size enums · aad298ff
      Jingning Han authored
      Remove redundant experimental flag. This does not change the coding
      statistics.
      
      Change-Id: I35b3cb04025c5c2d2744312e5efc00d0473c990d
      aad298ff
  17. 01 Nov, 2016 2 commits
  18. 26 Oct, 2016 1 commit
  19. 25 Oct, 2016 1 commit
  20. 24 Oct, 2016 1 commit
  21. 20 Oct, 2016 1 commit
    • hui su's avatar
      Seperate FILTER_INTRA from EXT_INTRA experiment · 5db9743f
      hui su authored
      Prepare for the av1/nextgenv2 merge.
      
      Coding gain (%):
      
                     lowres     midres
      ext-intra       0.69       0.97
      filter-intra    0.67       0.83
      both            1.05       1.48
      
      Change-Id: Ia24d6fafb3e484c4f92192e0b7eee5e39f4f4ee6
      5db9743f
  22. 19 Oct, 2016 1 commit
    • Thomas Davies's avatar
      Step size and arithmetic coding for delta quantization. · f693610a
      Thomas Davies authored
      Example performance: 1.8% bit rate savings using
      the AQ test mode aq-mode=4 :
      ./aomenc --codec=av1 --ivf --tile-columns=1 --tile-rows=1 \
                       --kf-max-dist=1000 --kf-min-dist=1000 --cpu-used=0 \
                       --passes=1 --threads=1 --lag-in-frames=0 \
                       --end-usage=q --limit=600 --cq-level=42 \
                       --aq-mode=4 --error-resilient=1 out.bits FourPeople_1280x720_60.y4m
      
      Change-Id: Iba01cf2732a57f3c27481ac2a3c8fc37bb9e5533
      f693610a
  23. 14 Oct, 2016 3 commits
  24. 13 Oct, 2016 2 commits
    • Steinar Midtskogen's avatar
      Move CLPF block signals from frame to SB level. · 97535038
      Steinar Midtskogen authored
      These signals were in the uncompressed frame header (as a temporary
      hack), which caused two problems:
      
      * We don't want that header to be duplicated in the slice header
      * It was necessary to signal the number of bits to transmit up front
      
      However, the filter size can be 128x128 which is greater than the SB
      size, and a decoder wouldn't be able to know whether to read a bit or
      not until the final SB of that 128x128 block has been decoded
      (depending on whether the 128x128 is all skip or not).  Therefore the
      signalling was changed for 128x128 blocks so that every top left SB of
      a 128x128 filter block contains a signal regardless of whether the
      block is all skip or not.  Also, all the MB's of 128x128 block are
      filtered even if they are skip MB's.  This gives the signal a purpose
      even when the 128x128 block is all skip, and it also gives a slight
      coding gain as it leaves a way to filter skip blocks, which was
      previously forbidden.
      
      Low latency:
      PSNR YCbCr:     -0.19%     -0.14%     -0.06%
         PSNRHVS:     -0.15%
            SSIM:     -0.13%
          MSSSIM:     -0.15%
       CIEDE2000:     -0.19%
      
      High latency:
      PSNR YCbCr:     -0.03%     -0.01%     -0.09%
         PSNRHVS:      0.04%
            SSIM:      0.00%
          MSSSIM:      0.02%
       CIEDE2000:     -0.02%
      
      Change-Id: I69ba7144d07d388b4f0968f6a53558f480979171
      97535038
    • Yue Chen's avatar
      Renamings for OBMC experiment · cb60b185
      Yue Chen authored
      To get ready for pulling AV1 to nextgenv2
      Replace the experimental flag by MOTION_VAR. Rename major variables.
      
      Change-Id: If6cf4f37b9319c46d8f90df551cc7295d66ca205
      cb60b185
  25. 04 Oct, 2016 1 commit
    • Steinar Midtskogen's avatar
      Move CLPF block signals from frame to SB level. · 85437b21
      Steinar Midtskogen authored
      These signals were in the uncompressed frame header (as a temporary
      hack), which caused two problems:
      
      * We don't want that header to be duplicated in the slice header
      * It was necessary to signal the number of bits to transmit up front
      
      However, the filter size can be 128x128 which is greater than the SB
      size, and a decoder wouldn't be able to know whether to read a bit or
      not until the final SB of that 128x128 block has been decoded
      (depending on whether the 128x128 is all skip or not).  Therefore the
      signalling was changed for 128x128 blocks so that every top left SB of
      a 128x128 filter block contains a signal regardless of whether the
      block is all skip or not.  Also, all the MB's of 128x128 block are
      filtered even if they are skip MB's.  This gives the signal a purpose
      even when the 128x128 block is all skip, and it also gives a slight
      coding gain as it leaves a way to filter skip blocks, which was
      previously forbidden.
      
      Low latency:
      PSNR YCbCr:     -0.19%     -0.14%     -0.06%
         PSNRHVS:     -0.15%
            SSIM:     -0.13%
          MSSSIM:     -0.15%
       CIEDE2000:     -0.19%
      
      High latency:
      PSNR YCbCr:     -0.03%     -0.01%     -0.09%
         PSNRHVS:      0.04%
            SSIM:      0.00%
          MSSSIM:      0.02%
       CIEDE2000:     -0.02%
      
      Change-Id: I69ba7144d07d388b4f0968f6a53558f480979171
      85437b21
  26. 22 Sep, 2016 1 commit
  27. 19 Sep, 2016 1 commit
  28. 17 Sep, 2016 1 commit
    • Debargha Mukherjee's avatar
      Enable tile-adaptive restoration · 5cd2ab95
      Debargha Mukherjee authored
      Includes a major refactoring/enhancement to support
      tile-adaptive switchable restoration. The framework can be
      readily extended to add more restoration schemes in the
      future. Also includes various cleanups and fixes.
      
      Specifically the framework allows restoration to be conducted
      on tiles such that each tile can be either left unrestored, or
      use bilateral or wiener filtering.
      
      There is a modest improvemnt in coding efficiency (0.1 - 0.2%).
      
      Further enhancements will be added subsequently to improve coding
      efficiency and complexity.
      
      Change-Id: I5ebedb04785ce1ef6f324abe209e925c2d6cbe8a
      5cd2ab95
  29. 15 Sep, 2016 1 commit
    • Thomas Davies's avatar
      Step size and arithmetic coding for delta quantization. · dca173a6
      Thomas Davies authored
      Example performance: 1.8% bit rate savings using
      the AQ test mode aq-mode=4 :
      ./aomenc --codec=av1 --ivf --tile-columns=1 --tile-rows=1 \
                       --kf-max-dist=1000 --kf-min-dist=1000 --cpu-used=0 \
                       --passes=1 --threads=1 --lag-in-frames=0 \
                       --end-usage=q --limit=600 --cq-level=42 \
                       --aq-mode=4 --error-resilient=1 out.bits FourPeople_1280x720_60.y4m
      
      Change-Id: Iba01cf2732a57f3c27481ac2a3c8fc37bb9e5533
      dca173a6
  30. 05 Sep, 2016 1 commit
    • Debargha Mukherjee's avatar
      Enable rectangular transforms for UV · 2f12340f
      Debargha Mukherjee authored
      Uses an array to map block sizes, y tx sizes, and subsampling
      factors to various transform sizes for UV.
      
      Results improve by 0.1-0.2%
      
      Change-Id: Icb58fd96bc7c01a72cbf1332fe2be4d55a0feedc
      2f12340f
  31. 02 Sep, 2016 1 commit
  32. 01 Sep, 2016 1 commit