1. 29 Nov, 2017 1 commit
  2. 27 Nov, 2017 3 commits
  3. 24 Nov, 2017 7 commits
  4. 23 Nov, 2017 2 commits
  5. 20 Nov, 2017 2 commits
    • Dake He's avatar
      [lv_map_multi] Base level alphabet adjustment · 3fe369c8
      Dake He authored
      At eob-1, coefficient must be non-zero. As such, this CL changes the
      alphabet for base levels at eob-1 from size 4 to size 3. Minor
      performance improvement is observed. In addition, changes in 33462 made
      by Ola Hugosson were also incorporated.
      
      Now with trained initial probability distributions.
      
      Change-Id: Id6b5d0908b5ff186ed88ab0733ce7cc0c4a468d5
      3fe369c8
    • Yue Chen's avatar
      New filter_intra implementation + entropy coding · da2eefc6
      Yue Chen authored
      Use 4x2 processing unit.
      Reduce # of modes from 6 to 5.
      
      Change-Id: I3c12e18084636de0e279c9102a8b212342faf4c7
      da2eefc6
  6. 17 Nov, 2017 1 commit
    • Ola Hugosson's avatar
      lv_map_multi: add 2 more eob coeff contexts · d2352ecb
      Ola Hugosson authored
      The EOB coefficient cannot be 0 and for that reason it has special base_cdf contexts.
      Before this commit there was two contexts (DC and AC). This commit adds two additional
      contexts to separate the AC into 3 bands (i<=N/8, i<=N/4, i<=N/2).
      
      Change-Id: If088b20fd891920b7ea7fc988d29bf6d86d93bfc
      d2352ecb
  7. 16 Nov, 2017 1 commit
    • Ola Hugosson's avatar
      lv_map_multi: revert accidental prob change · 52d6c895
      Ola Hugosson authored
      In e72a2091 one lps default probability was accidentally changed from 1 to 128 for
      non LV_MAP_MULTI mode. This commit reverts that change and make the change only for
      LV_MAP_MULTI mode. Also rather than changing to 128, the probability is changed to 10.
      
      Change-Id: Ia8950379c46c59d40ea388fcd0621bbd78c26ede
      52d6c895
  8. 15 Nov, 2017 4 commits
  9. 14 Nov, 2017 3 commits
    • Ola Hugosson's avatar
      WIP: lv_map_multi: make br multi symbol · e72a2091
      Ola Hugosson authored
      The br_cdf and lps_cdf with a new 4-state symbol br_cdf.
      The br symbol indicates whether the level is k, k+1, k+2 or >k+2
      In the latter case, a new br symbol is read. Up to 4 br symbols are
      read which will reach level 14 at most. Levels greater than 14 are
      golomb coded.
      
      The adapted symbol count is reduced further by this commit.
      E.g. for the I-frame of ducks_take_off at cq=12, the number of adapted symbols
      is reduced from 4.27M to 3.85M. About 10% reduction.
      
      Gains seems about neutral on a limitied subset.
      
      Change-Id: I294234dbd63fb0fa26aef297a371cba80bd67383
      e72a2091
    • Ola Hugosson's avatar
      WIP: lv_map_multi: New experiment · 13892108
      Ola Hugosson authored
      This experiment modifies lv_map to make use of multi symbol.
      
      Replace the nz_map and coeff_base binary CDF with a new multi-symbol
      CDF of size 4. The new base_cdf indicates for each coeff if the level
      is 0, 1, 2 or >2. Two new special contexts are added to be used for the
      last coefficient (the EOB coeff). For the EOB coefficient we already know
      that it is non-zero. We use one context for DC EOB and one for AC EOB
      (this can potentially be refined more).
      
      The new symbol is read/written by special bitreader/bitwriter functions.
      Those functions reduce the probability precision from 15bit to 9bit before
      the invocation of the arithmetic coding engine.
      
      The adapted symbol count is significantly reduced by this experiment.
      E.g. for the I-frame of ducks_take_off at cq=12, the number of adapted symbols
      is reduced from 6.7M to 4.3M.
      
      Change-Id: Ifc3927d81ad044fb9b0733f1e54d713cb71a1572
      13892108
    • Cheng Chen's avatar
      JNT_COMP: reduce context model number · c87b340e
      Cheng Chen authored
      Reduce context model number from 9 to 6.
      Let context be two kinds: two reference frames are equal distance
      or not.
      Also, give equal distance compound weight {9, 7} instead of {8, 8}/16
      
      Reducing context model gives neutral performance.
      New compound weight provides -0.14% gain.
      
      Change-Id: I8a3f3021eac9e446ac826e5992f42931af4c8962
      c87b340e
  10. 13 Nov, 2017 4 commits
    • Sebastien Alaiwan's avatar
      Remove UNPOISON_PARTITION_CTX experiment · a6a486c1
      Sebastien Alaiwan authored
      This experiment has been abandonned for AV1.
      
      Change-Id: I07be0876b21ee20a1eb2490bb98e4f84978ff001
      a6a486c1
    • Yue Chen's avatar
      Fix inefficient coding of filter_intra modes · 4eba69bb
      Yue Chen authored
      Include a few RDO fixes that properly account for the extra flag
      cost at the right place. Also entropy coding of the flag is made
      contexted on tx_size and based on cdf framework.
      
      Change-Id: I52f98ace7e253ccc08917a4a7b517515d1d58a98
      4eba69bb
    • Hui Su's avatar
      Update the q_adapt_probs experiment · 3694c834
      Hui Su authored
      Make it work with NO_FRAME_CONTEXT_SIGNALING.
      
      Change-Id: I27813305c68de7042678706c1c9b938b172c3666
      3694c834
    • Debargha Mukherjee's avatar
      Change tx_size encoding for intra modes · 6147b1b6
      Debargha Mukherjee authored
      Conveys depth from the largest transform size instead of the
      actual transform size. Besides, the max depth is now limited
      by the macro MAX_TX_DPETH set at 2.
      
      Results: BDRATE lowres (30 frames): -0.005%
      
      Change-Id: I1ccbac8ee18c77b816a6a8f500abfaa7892b21de
      6147b1b6
  11. 10 Nov, 2017 3 commits
  12. 09 Nov, 2017 1 commit
    • Rostislav Pehlivanov's avatar
      Add the q_segmentation experiment · f624dd5a
      Rostislav Pehlivanov authored
      This experiment implements low-cost delta q signalling on a per-block basis
      for all non-inter frame types, which would allow for more efficient AQ
      which bases its decisions on temporal information.
      
      Based on an Intel proposal from March.
      
      Change-Id: I18e73d8b12f4caa0b165df12c58ab506271bec03
      f624dd5a
  13. 08 Nov, 2017 1 commit
    • Thomas Daede's avatar
      Use AOM_CDF* macros instead of bare AOM_ICDF macros. · e82e5774
      Thomas Daede authored
      This will facilitate later experiments reducing the precision
      of probabilities.
      
      after_cdf_table_rewrite-3 -> before_cdf_table_rewrite-3
      
        PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
      0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000
      
      Change-Id: Ief01b4d7fdca075c41e9add079f7ac836dafcfbe
      e82e5774
  14. 07 Nov, 2017 1 commit
    • Joe Young's avatar
      Enable ext-intra-mod by default · 2edfc37b
      Joe Young authored
      Provisionally adopted on 2017-10-31
      
      (Also an asan warning fix + few non-functional changes)
      
      Change-Id: I2ff4f34f8b20d2eeb567f2e5b1e57b296a97be82
      2edfc37b
  15. 06 Nov, 2017 1 commit
    • Yushin Cho's avatar
      [segment] Remove coding of seg->abs_delta · d728c216
      Yushin Cho authored
      Remove the option of raw data or delta when coding the
      segment data, then only use delta coding.
      
      Raw data coding of segment data has been nowhere used but
      the option of "raw or delta codig of seg_data" has been coded to a bitstream.
      
      Change-Id: Iaf8f21692452d0c9a127b958812c6151d3c5db05
      d728c216
  16. 05 Nov, 2017 1 commit
  17. 04 Nov, 2017 1 commit
  18. 02 Nov, 2017 2 commits
    • Sebastien Alaiwan's avatar
      Remove experimental flag of EXT_TX · 3bac9928
      Sebastien Alaiwan authored
      This experiment has been adopted, we can simplify the code
      by dropping the associated preprocessor conditionals.
      
      Change-Id: I02ed47186bbc32400ee9bfadda17659d859c0ef7
      3bac9928
    • Dake He's avatar
      [level map] simplified context derivation · 03a32926
      Dake He authored
      This CL simplifies context derivation for nz and base level flags in
      level map.
      1. Reduce SIG_COEF_CONTEXTS from 58 to 42.
      2. NZ and base level flags share the same context offsets derived from a
      template of size 5 (down from 7).
      
      In limited runs, compression performance seems neutral if not better.
      Encoding time for a key frame on a local linux machine is reduced by about 25% or more.
      
      Change-Id: Ibd93b21c839154bc5ae26b993f9e66537cbf5942
      03a32926
  19. 01 Nov, 2017 1 commit
    • 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