1. 14 Dec, 2017 1 commit
    • Luc Trudeau's avatar
      [Clean Up] Remove get_y_mode() · 2eb9b845
      Luc Trudeau authored
      The get_y_mode function, is superfluous, not used consistently, and requires a
      useless block_idx parameter than gets pass around a lot inside the
      codebase for no apparent reason.
      
      The block parameter is misleading, as it could cause people to think all these
      functions actually use this value.
      
      Change-Id: I7ae0a8d1282c009b9114c83771cce10f5c2ee397
      2eb9b845
  2. 12 Dec, 2017 2 commits
    • Hui Su's avatar
      intrabc: modify default ref dv · 2d46afcd
      Hui Su authored
      Make sure the ref dv is a valid dv.
      
      Improves compression by about 0.3% on screen_content keyframes.
      
      Change-Id: I3a20c1a04b0ebcad610276f21b410dcfc8ba4c4d
      2d46afcd
    • Cheng Chen's avatar
      LPF_SB: set row delay to work with intrabc · f18ba021
      Cheng Chen authored
      Intrabc search area can't use pixels of the last 8 rows in the current
      superblock row. Add a delay so that lpf_sb can work with intrabc.
      
      Let lpf_sb on with intrabc while other loop filtering off (cdef, loop
      restoration).
      
      Change-Id: I98ab093a17096387b6233182da2656f90dfa09eb
      f18ba021
  3. 09 Dec, 2017 1 commit
  4. 05 Dec, 2017 1 commit
  5. 22 Nov, 2017 1 commit
  6. 21 Nov, 2017 1 commit
    • Dominic Symes's avatar
      Proposed changes to intrabc valid source area · 1699b50e
      Dominic Symes authored
      The horizontal delay is specified in pixels to work for SB64 and SB128.
      The wavefront gradient is changed so the above block is available.
      
      Change-Id: I24cc426bded6904925930f6d431f5737070f9e17
      1699b50e
  7. 18 Nov, 2017 1 commit
    • Zoe Liu's avatar
      Add motion selection to ext_skip · f40a9577
      Zoe Liu authored
      A new block mode, referred to as skip_mode is added. If a block is
      coded as skip_mode, it will be inter-coded, with its references and
      motion vectors derived from its neighboring blocks with zero-residue.
      Otherwise, the block can be coded in the current intra or inter mode.
      
      The computational load on skip_mode evaluation at the encoder should
      be kept minimum. No transform size / type evaluations are needed.
      
      Change-Id: I5aef0159c7d5ecd64258510835903375d6c536d6
      f40a9577
  8. 17 Nov, 2017 1 commit
    • Yunqing Wang's avatar
      Reuse neighbor's warped motion parameters · 876a8b0b
      Yunqing Wang authored
      If a block's motion_mode is WARPED_CAUSAL and its mode is NEARESTMV, search
      its immediate above and left neighbors to get the set of neighbor blocks
      using WARPED_CAUSAL motion mode, pick the one with largest block size, and
      use that neighbor's warped motion parameters directly for the current block.
      If none of the neighbors uses WARPED_CAUSAL motion mode, we estimate the
      current block's warped motion parameters.
      
      Before this patch, for every block, we estimate its warped motion parameters.
      With this patch, we reduce the number of blocks doing parameter estimation.
      Here are results by testing on clips with camera motions.
                          WARPED_CAUSAL blocks   blocks reusing parameters
      station2_240p(30f):     3857                    1678
      netflix_arieal(30f):     692                     223
      
      No noticable changes in coding gain. Borg test result showed a PSNR
      change of +0.006% on cam_lowres set, and -0.014% on lowres set.
      
      Change-Id: If12387ad0ca8a1996ea4c3f1bedcb269ebf78c6c
      876a8b0b
  9. 15 Nov, 2017 1 commit
  10. 10 Nov, 2017 1 commit
    • Urvang Joshi's avatar
      Remove smooth_hv experiment flag. · b7301cd6
      Urvang Joshi authored
      This experiment has been cleared by Tapas.
      
      Also, fix a couple of hash signatures in the test while we are at it.
      
      Change-Id: I1658bcb07913cf8bd47cfffadd729e16d5c55fc3
      b7301cd6
  11. 07 Nov, 2017 1 commit
  12. 01 Nov, 2017 3 commits
    • Sarah Parker's avatar
      Rename ZEROMV to GLOBALMV · 2b9ec2ea
      Sarah Parker authored
      This name better reflects the functionality of the mode.
      
      Change-Id: Idc2372e7c7b226f70f63fa4f272a88cb4d857089
      2b9ec2ea
    • Zoe Liu's avatar
      Remove redundant macro USE_UNI_COMP_REFS · c6b17d82
      Zoe Liu authored
      USE_UNI_COMP_REFS is always true when ext-comp-refs is enabled and is
      always false otherwise.
      
      Change-Id: Ic6061a4ab88a2ebfeb11f178872ab13909060c0b
      c6b17d82
    • Zoe Liu's avatar
      Add decoder support to ext_skip · f704a1c8
      Zoe Liu authored
      At the frame header level, add the checking on whether an inter-coded
      frame allows the use of 'skip_mode'. At the block level, add the
      decoding of 'skip_mode' for all the blocks if 'skip_mode' is allowed
      for the current frame. If 'skip_mode' is set, no further bit needs to
      read out, and the block is set as:
      - Inter-coded in compound mode;
      - With the nearest forward and backward reference frames;
      - In NEAREST_NEARESTMV mode;
      - In SIMPLE_TRANSLATION motion mode;
      - In COMPOUND_AVERAGE compound type; and
      - Skip set for residual.
      
      Change-Id: I50297f63a81135109332c4a51b516bffd7726777
      f704a1c8
  13. 31 Oct, 2017 1 commit
  14. 21 Oct, 2017 1 commit
    • Jingning Han's avatar
      Remove deprecated sub8x8 functions · 39ace890
      Jingning Han authored
      Cb4x4 unifies the operating for both sub8x8 and regular block sizes.
      Remove unused special handle for sub8x8.
      
      Change-Id: I7aadc541b753880a98979142206ccc73d22527ae
      39ace890
  15. 20 Oct, 2017 1 commit
    • Debargha Mukherjee's avatar
      Remove CONFIG_CB4X4 config flags · 6ea917ec
      Debargha Mukherjee authored
      Since CB4X4 is adopted and without it the codec does not work,
      it is better to remove it and simplify the code.
      
      Change-Id: I51019312846928069727967e3b2bbb60f0fba80d
      6ea917ec
  16. 16 Oct, 2017 1 commit
  17. 12 Oct, 2017 1 commit
    • Yunqing Wang's avatar
      Find warped reference MV · 97d6a37e
      Yunqing Wang authored
      While finding the reference MV for a block, if one neighbouring block's
      motion mode is warped motion mode, instead of directly adding that
      block's MV to the candidate MV list, we use that neighbouring block's
      warped motion parameters to compute a MV for the center point of the
      current block, and then add that MV to the candidate MV list.
      
      Borg test result:
                   avg_psnr ovr_psnr ssim
      cam_lowres:  -0.507   -0.514  -0.685
      lowres:      -0.114   -0.122  -0.180
      
      The change is added under ext_warped_motion config flag.
      
      Change-Id: I3ce6290a1fd512b613eab5d7620c8bcb08f189a6
      97d6a37e
  18. 11 Oct, 2017 1 commit
  19. 09 Oct, 2017 1 commit
    • Zoe Liu's avatar
      Add encoder/decoder support to frame_sign_bias · 17af2748
      Zoe Liu authored
      Frame sign bias value will not be signaled in frame header. Instead,
      the sign bias of reference frames are derived from their corresponding
      frame offsets at both encoder and decoder.
      
      The tool of 'frame_sign_bias' is dependent of 'frame_marker'. Compared
      against baseline, the enabling of both tools obtains a small coding gain
      of -0.08 ~ -0.11% in BDRate over Google lowres/midres tests.
      
      Change-Id: I8d85dc427ced0b2152712ccf61be4be6068075b9
      17af2748
  20. 08 Oct, 2017 1 commit
    • Yunqing Wang's avatar
      Modify storing and using of the temporal frame MVs · d1d511f3
      Yunqing Wang authored
      Add an experiment "tmp", which includes:
      1. Always use larger block size while storing frame MVs and make
      it consistent for CB4X4 or non-CB4X4 cases. Namely, use 8x8 for
      4x4 mi size and 16x16 for 8x8 mi size.
      2. Allocate smaller buffer for frame MVs and save memory usage.
      3. Use nearby 8x8 or 16x16 location's previous frame MVs, and make
      the logic simple.
      4. Reduce the number of copying for frame MVs, that is very costly
      in decoder.
      
      Baseline decoder got 5+% speedup. Borg test on lowres set showed a
      +0.009% PSNR difference before/after the patch.
      
      Change-Id: I61e14e95fd35bea88f338931b4f43c44f4e4cf1f
      d1d511f3
  21. 02 Oct, 2017 1 commit
  22. 29 Sep, 2017 1 commit
  23. 19 Sep, 2017 1 commit
  24. 02 Sep, 2017 1 commit
  25. 31 Aug, 2017 2 commits
    • Jingning Han's avatar
      Enable motion field estimation in DRL · ffbb0f91
      Jingning Han authored
      Enable the use of motion field estimation in the dynamic motion
      vector referencing system. With default experiments on, it improves
      the compression performance:
      
      lowres 1.2%
      midres 1.5%
      
      Change-Id: Ifc5b15a7239b5c3212ea50f326ab99d372034658
      ffbb0f91
    • Jingning Han's avatar
      Add frame index to the decoded frames · c723b348
      Jingning Han authored
      Add frame index to the deocded frames. Store such information to
      the reference frame buffer pool. This design allows each frame
      to know its index in natural order, as well as its reference
      frames positions.
      
      Change-Id: I5bb36928dc5750a4fdcc582dca0d244d6482f400
      c723b348
  26. 30 Aug, 2017 1 commit
    • Yunqing Wang's avatar
      Refactor setup_ref_mv_list · d797ea9e
      Yunqing Wang authored
      This patch eliminates the is_inside() checking for each neighouring
      block in scan_row_mbmi() and scan_col_mbmi(). Instead, in
      setup_ref_mv_list(), find maximum above row_offset and left col_offset
      for current block, and use them to decide which above rows and left
      columns to search on. This patch doesn't change bitstream. No
      noticeable speedup is seen.
      
      Change-Id: Ic4ae74412605d86e9e675f86d23de3a69c04e8f3
      d797ea9e
  27. 15 Aug, 2017 1 commit
    • Urvang Joshi's avatar
      Remove ALT_INTRA flag. · 93b543ab
      Urvang Joshi authored
      This experiment has been adopted as it has been cleared by Tapas.
      
      Change-Id: I0682face60f62dd43091efa0a92d09d846396850
      93b543ab
  28. 21 Jul, 2017 1 commit
  29. 20 Jul, 2017 1 commit
    • Zoe Liu's avatar
      Add support to the experiment of altref2 · 97ad058e
      Zoe Liu authored
      This CL adds an extra alt-ref reference frame, namely ALTREF2_FRAME,
      and designs the contexts for ALTREF2_FRAME.
      
      Change-Id: I12fe8629b868aebf6c2b54260fca5abc38f90ae6
      97ad058e
  30. 14 Jul, 2017 1 commit
    • Yunqing Wang's avatar
      Sample selection in warped motion · 1bc82866
      Yunqing Wang authored
      Added a sample selection process in warped motion.
      1. Gather more samples including multiple rows on the top, multiple
      columns on the left, and the upper-right block.
      2. Sort samples by the MV difference between the neighbour's MV and
      the current block's MV. Trim the samples with considerably large MV
      difference.
      
      Borg test result:
                   avg_psnr ovr_psnr ssim
      cam_lowres:  -0.241   -0.243  -0.376
      lowres:      -0.104   -0.110  -0.179
      
      The changes are wrapped in WARPED_MOTION_SORT_SAMPLES macro.
      
      Change-Id: I2730bb31a0a3ad28215ccd16fd6da0ea8b2ed404
      1bc82866
  31. 12 Jul, 2017 1 commit
    • Zoe Liu's avatar
      Further work on ext-comp-refs for ref frame coding · fcf5fa27
      Zoe Liu authored
      (1) Work with var-refs to remove redundant bits in ref frame
          coding;
      (2) Add a new uni-directional compound reference pair:
          (LAST_FRAME, LAST3_FRAME);
      (3) Redesign the contexts for encoding uni-directional reference frame
          pairs;
      (4) Use aom_entropy_optimizer to collect stats for all the default
          probability setups related to the coding of reference frames.
      
      Compared against the baseline (default enabled tools excluding ext-tx
      and global-motion for encoder speed concern) with one-sided-compound,
      the coding gain of ext-comp-refs + var-refs - one-sided-compound is:
      
      lowres: avg_psnr -0.385%; ovr_psnr -0.378% ssim -0.344%
      midres: avg_psnr -0.466%; ovr_psnr -0.447% ssim -0.513%
      
      AWCY - High Latency:
         PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
      -0.2758 | -0.1526 | -0.0965 |  -0.2581 | -0.2492 | -0.2534 |    -0.2118
      
      AWCY - Low Latency:
         PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
      -1.0467 | -1.4500 | -0.9732 |  -0.9928 | -1.0407 | -1.0180 |    -1.0049
      
      Compared against the baseline (default enabled tools excluding ext-tx
      and global-motion for encoder speed concern) without
      one-sided-compound, the coding gain of
      ext-comp-refs + var-refs - one-sided-compound is:
      
      lowres: avg_psnr -0.875%; ovr_psnr -0.877% ssim -0.895%
      midres: avg_psnr -0.824%; ovr_psnr -0.802% ssim -0.843%
      
      Change-Id: I8de774c9a74c20632ea93ccb0c17779fa94431cb
      fcf5fa27
  32. 19 Jun, 2017 1 commit
    • Zoe Liu's avatar
      Add new coding tool of ext-comp-refs · c082bbcb
      Zoe Liu authored
      The tool of ext-comp-refs adds the uni-directional compound reference
      prediction. In details, 3 pairs of uni-direcitonal compound references
      are added for the comp ref prediction:
      (LAST_FRAME, LAST2_FRAME),
      (LAST_FRAME, GOLDEN_FRAME), and
      (BWDREF_FRAME, ALTREF_FRAME).
      
      This new tool of ext-comp-refs will eventually overwrite
      one-side-compound and have the two coding tools to merge to one.
      
      It achieves -0.35 ~ -0.55% coding gains in BDRate, compared against
      AV1 baseline with the default experiments on, but without
      one-sided-compound. It achieves -0.2% ~ -0.3% coding gains when
      one-sided-compound is on. It achieves larger gains on higher
      resolution.
      
      Change-Id: Icbdb16e97b96aaebaf2213f5f72d5331e2e358eb
      c082bbcb
  33. 13 Jun, 2017 1 commit
    • Zoe Liu's avatar
      Add encoder/decoder pipeline to support single ref comp modes · 85b66463
      Zoe Liu authored
      Now the single ref comp mode should work with WEDGE and
      COMPOUND_SEGMENT. For motion_var, the OBMC_CAUSAL mode uses the 2nd
      predictor if the neighboring block is single ref comp mode predicted.
      
      This patch removes the mode of SR_NEAREST_NEWMV and leaves four
      single ref comp modes in total:
      
      SR_NEAREST_NEARMV
      SR_NEAR_NEWMV
      SR_ZERO_NEWMV
      SR_NEW_NEWMV
      
      Change-Id: If6140455771f0f1a3b947766eccf82f23cc6b67a
      85b66463
  34. 23 May, 2017 1 commit
  35. 18 May, 2017 1 commit
  36. 15 May, 2017 1 commit