1. 16 Nov, 2012 1 commit
  2. 10 Nov, 2012 1 commit
    • Deb Mukherjee's avatar
      New b-intra mode where direction is contextual · d01357bb
      Deb Mukherjee authored
      Preliminary patch on a new 4x4 intra mode B_CONTEXT_PRED where the
      dominant direction from the context is used to encode. Various decoder
      changes are needed to support decoding of B_CONTEXT_PRED in conjunction
      with hybrid transforms since the scan order and tokenization depends on
      the actual direction of prediction obtained from the context. Currently
      the traditional directional modes are used in conjunction with the
      B_CONTEXT_PRED, which also seems to provide the best results.
      
      The gains are small - in the 0.1% range.
      
      Change-Id: I5a7ea80b5218f42a9c0dfb42d3f79a68c7f0cdc2
      d01357bb
  3. 01 Nov, 2012 2 commits
  4. 31 Oct, 2012 4 commits
  5. 23 Oct, 2012 1 commit
    • Deb Mukherjee's avatar
      Merging in the Switchable interp experiment · 53731197
      Deb Mukherjee authored
      There is a macro DEFAULT_INTERP_FILTER defined in encoder/onyx_if.c that
      is set as EIGHTTAP for now - so SWITCHABLE is not really used. Ideally,
      this should be SWITCHABLE but that would make the encoder quite a bit slower.
      We will change the default filter to SWITCHABLE once we find a faster way to
      search for switchable filters.
      
      Change-Id: Iee91832cdc07e6e14108d9b543130fdd12fc9874
      53731197
  6. 30 Jul, 2012 1 commit
    • Deb Mukherjee's avatar
      Adds support for switchable interpolation filters. · 52597441
      Deb Mukherjee authored
      Allows for swtiching/setting interpolation filters at the MB
      level. A frame level flag indicates whether to use a specifc
      filter for the entire frame or to signal the interpolation
      filter for each MB. When switchable filters are used, the
      encoder chooses between 8-tap and 8-tap sharp filters. The
      code currently has options to explore other variations as well,
      which will be cleaned up subsequently.
      
      One issue with the framework is that encoding is slow. I
      tried to do some tricks to speed things up but it is still slow.
      Decoding speed should not be affected since the number of
      filter taps remain unchanged.
      
      With the current version, we are up 0.5% on derf on average but
      some videos city/mobile improve by close to 4 and 2% respectively.
      If we did a full-search by turning the SEARCH_BEST_FILTER flag
      on, the results are somewhat better.
      
      The framework can be combined with filtered prediction, and I
      seek feedback regarding that.
      
      Rebased.
      
      Change-Id: I8f632cb2c111e76284140a2bd480945d6d42b77a
      52597441
  7. 27 Jul, 2012 1 commit
    • Deb Mukherjee's avatar
      Merges several experiments · 9984a155
      Deb Mukherjee authored
      The following five experiments are merged:
      
      newentropy
      newupdate
      adaptive_entropy (also includes a couple of parameter changes
                        that improves results a little
                        in common/entropymode.c and encoder/modecosts.c
                        that were not merged from the internal branch)
      newintramodes
      expanded_coef_context
      
      Change-Id: I8a142a831786ee9dc936f22be1d42a8bced7d270
      9984a155
  8. 17 Jul, 2012 1 commit
  9. 29 Jun, 2012 2 commits
  10. 26 Jun, 2012 1 commit
    • Deb Mukherjee's avatar
      Continued adaptive entropy coding · f3dff402
      Deb Mukherjee authored
      Incorporates mv_ref, mbsplit and second_mv into the adaptive
      entropy framework. The mv_ref framework has been modified from
      before.
      
      Adds some clean-ups and fixes.
      
      Results with the adaptive entropy experiment are currently up by
      +1.93% on derf; +2.33% std-hd and +1.87% yt-hd.
      
      Fixed a nasty intermittent bug.
      
      Change-Id: I4b1ac9f9483b48432597595195bfec05f31d1e39
      f3dff402
  11. 19 Jun, 2012 1 commit
  12. 15 Jun, 2012 1 commit
    • Deb Mukherjee's avatar
      Adaptive entropy coding of coefficients, modes, mv. · 1fe85a35
      Deb Mukherjee authored
      This patch incorporates adaptive entropy coding of coefficient tokens,
      and mode/mv information based on distributions encountered in a frame.
      Specifically, there is an initial forward update to the probabilities
      in the bitstream as before for coding the symbols in the frame, however
      at the end of decoding each frame, the forward update to the
      probabilities is reverted and instead the probabilities are updated
      towards the actual distributions encountered within the frame.
      The amount of update is weighted by the number of hits within each
      context.
      
      Results on derf/hd/std-hd are all up by 1.6%.
      
      On derf, the most of the gains come from coefficients, however for the
      hd and std-hd sets, the most of the gains come from the mode/mv
      information updates.
      
      Change-Id: I708c0e11fdacafee04940fe7ae159ba6844005fd
      1fe85a35
  13. 25 Apr, 2012 2 commits
    • Yaowu Xu's avatar
      Merge QIMODE experiment · a16608ab
      Yaowu Xu authored
      This commit merge the QI mode experiment. As the experiment affects
      the encoding of intra coding modes on key frame only, the overall
      effect of the experiment on encoding tests is insignificant.
      
      Change-Id: I9e4e3933adface88867ad429cee3986e529c511d
      a16608ab
    • Yaowu Xu's avatar
      Merge UVINTRA experiment · c1814d26
      Yaowu Xu authored
      The commit merges the UVINTRA experiment and removed the related
      macros. The overall effect of the experiment is a small gain (.1%
      on derf)
      
      Change-Id: Ia34b3312fb9b5b34c9ba111bf0fa78c6f78ac80b
      c1814d26
  14. 23 Apr, 2012 2 commits
    • Attila Nagy's avatar
      Shares one set of RD costs tables between all encoding threads · b41c17d6
      Attila Nagy authored
      RD costs were local to MACROBLOCK data and had to be copied all the
      time to each thread's MACROBLOCK data. Tables moved to a common place
      and only pointers are setup for each encoding thread.
      
      vp8_cost_tokens() generates 'int' costs so changed all types to be
      int (i.e. removed unsigned).
      
      NOTE: Could do some more cleaning in vp8cx_init_mbrthread_data().
      
      Change-Id: Ifa4de4c6286dffaca7ed3082041fe5af1345ddc0
      b41c17d6
    • Attila Nagy's avatar
      Removes duplication of key frame mode probabilities · f4126995
      Attila Nagy authored
      Key frame macrobock and block mode probabilities are constant.
      Remove the allocation of tables for each codec instance and use
      instead the default const prob tables.
      
      Change-Id: I8361798ac491f9b3889e86925a494c58647c753f
      f4126995
  15. 15 Mar, 2012 1 commit
    • Yaowu Xu's avatar
      WebM Experimental Codec Branch Snapshot · 6035da54
      Yaowu Xu authored
      This is a code snapshot of experimental work currently ongoing for a
      next-generation codec.
      
      The codebase has been cut down considerably from the libvpx baseline.
      For example, we are currently only supporting VBR 2-pass rate control
      and have removed most of the code relating to coding speed, threading,
      error resilience, partitions and various other features.  This is in
      part to make the codebase easier to work on and experiment with, but
      also because we want to have an open discussion about how the bitstream
      will be structured and partitioned and not have that conversation
      constrained by past work.
      
      Our basic working pattern has been to initially encapsulate experiments
      using configure options linked to #IF CONFIG_XXX statements in the
      code. Once experiments have matured and we are reasonably happy that
      they give benefit and can be merged without breaking other experiments,
      we remove the conditional compile statements and merge them in.
      
      Current changes include:
      * Temporal coding experiment for segments (though still only 4 max, it
        will likely be increased).
      * Segment feature experiment - to allow various bits of information to
        be coded at the segment level. Features tested so far include mode
        and reference frame information, limiting end of block offset and
        transform size, alongside Q and loop filter parameters, but this set
        is very fluid.
      * Support for 8x8 transform - 8x8 dct with 2nd order 2x2 haar is used
        in MBs using 16x16 prediction modes within inter frames.
      * Compound prediction (combination of signals from existing predictors
        to create a new predictor).
      * 8 tap interpolation filters and 1/8th pel motion vectors.
      * Loop filter modifications.
      * Various entropy modifications and changes to how entropy contexts and
        updates are handled.
      * Extended quantizer range matched to transform precision improvements.
      
      There are also ongoing further experiments that we hope to merge in the
      near future: For example, coding of motion and other aspects of the
      prediction signal to better support larger image formats, use of larger
      block sizes (e.g. 32x32 and up) and lossless non-transform based coding
      options (especially for key frames). It is our hope that we will be
      able to make regular updates and we will warmly welcome community
      contributions.
      
      Please be warned that, at this stage, the codebase is currently slower
      than VP8 stable branch as most new code has not been optimized, and
      even the 'C' has been deliberately written to be simple and obvious,
      not fast.
      
      The following graphs have the initial test results, numbers in the
      tables measure the compression improvement in terms of percentage. The
      build has  the following optional experiments configured:
      --enable-experimental --enable-enhanced_interp --enable-uvintra
      --enable-high_precision_mv --enable-sixteenth_subpel_uv
      
      CIF Size clips:
      http://getwebm.org/tmp/cif/
      HD size clips:
      http://getwebm.org/tmp/hd/
      (stable_20120309 represents encoding results of WebM master branch
      build as of commit#7a159071)
      
      They were encoded using the following encode parameters:
      --good --cpu-used=0 -t 0 --lag-in-frames=25 --min-q=0 --max-q=63
      --end-usage=0 --auto-alt-ref=1 -p 2 --pass=2 --kf-max-dist=9999
      --kf-min-dist=0 --drop-frame=0 --static-thresh=0 --bias-pct=50
      --minsection-pct=0 --maxsection-pct=800 --sharpness=0
      --arnr-maxframes=7 --arnr-strength=3(for HD,6 for CIF)
      --arnr-type=3
      
      Change-Id: I5c62ed09cfff5815a2bb34e7820d6a810c23183c
      6035da54
  16. 09 Dec, 2011 1 commit
    • Yaowu Xu's avatar
      Enabled adaptive UV intra coding for inter frames · be360d47
      Yaowu Xu authored
      Previously, Y-adaptive UV intra coding only enabled on key frames in
      UVINTRA experiment. This commit enabled the same coding for inter
      frames, so the encoding of UV intra modes are consistent cross all
      frame types. Tests on derf set showed a very small overall gain around
      .04%:
      
      http://www.corp.google.com/~yaowu/no_crawl/interUVintra.html
      
      The gain looks to be reasonable given inta coded MBs is only a
      small portion of MBs in inter frames.
      
      Change-Id: Ic6fc261923f2c253f4a0c9f8bccf4797557b9e16
      be360d47
  17. 07 Dec, 2011 1 commit
    • Yaowu Xu's avatar
      Removed #if CONFIG_I8X8 · d37cd976
      Yaowu Xu authored
      This commit removed the macro CONFIG_I8X8, which was used to indicate
      the 8x8 intra prediction experiment, made the change fully merged in.
      
      Change-Id: Iafa4443781ce6e83f5591c12ba615a0e92ce0ea0
      d37cd976
  18. 04 Nov, 2011 1 commit
    • Yaowu Xu's avatar
      make uv intra mode coding adaptive to Y mode · 2bbde250
      Yaowu Xu authored
      This commit tries to do UV intra mode coding adaptive to Y intra mode.
      Entropy context is defined as conditional PDF of uv intra mode given
      the Y mode. All constants are normalized with 256 to be fit in 8 bits.
      
      This provides further coding efficiency beyond the quantizer adaptive
      y intra mode coding. Consistent gains were observed on all clips and
      all bit rates for HD all key encoding tests.
      
      To test, configure with
      --enable-experimental --enable-uvintra
      
      Change-Id: I2d78d73f143127f063e19bd0bac3b68c418d756a
      2bbde250
  19. 16 Sep, 2011 3 commits
    • Yaowu Xu's avatar
      enable selecting&transmitting to for intra mode entropy · 1d44e7ce
      Yaowu Xu authored
      This commit added a 3 bit index to the bitstream, the index is used to
      look into the intra mode coding entropy context table. The commit uses
      the mode stats to calculate the cost of transmitting modes using 8
      possible entropy distributions, and selects the distribution that
      provides the lowest cost to do the actual mode coding.
      
      Initial test show this provides additional .2%~.3% gain over quantizer
      adaptive intra mode coding. So the adaptive intra mode coding provides
      a total of .5%(psnr) to .6% gain(ssim) combined for all-key-encoding
      
      To build and test, configure with
      --enable-experimental --enable-qimode
      
      Change-Id: I7c41cd8bfb352bc1fe7c5da1848a58faea5ed74a
      1d44e7ce
    • Yaowu Xu's avatar
      add quantizer adaptive intra mb mode encoding · aac2c126
      Yaowu Xu authored
      make intra mode coding entropy distribution adaptive to baseQindex, an
      encoding test on hd clips with all key frame shows universal gain on
      all clips in both .2%(psnr) and (ssim).3%.
      
      To build and test, configure with
      --enable-experimental --enable-qimode
      
      Change-Id: Iaa69241b984d4fdd8baa6d77ee78c0140f5ac00a
      aac2c126
    • Yaowu Xu's avatar
      add 8x8 intra prediction modes · ca6b85aa
      Yaowu Xu authored
      Patch 1 to Patch 3 is an initial implementation of 8x8 intra prediction
      modes, here are with the following assumptions:
      a. 8x8 has 4 prediction modes DC, H, V and TM
      b. UV 4x4 block use the same mode as corresponding 8x8 area
      c. i8x8 modes are enabled for key frame only for now
      Patch 4:
      d. removed debug code from previous patches
      Patch 5:
      e. added stats code to collect entropy stats and further cleaned up
      Patch 6:
      f. changed mode stats code to collect finer stats of modes
      Patch 7:
      g. normalized i8x8 modes distribution to total at 256 (8bits).
      Patch 8:
      h. fixed a bug in decoder and removed debug printf output.
      Patch 9:
      i. more cleanups to address paul's comment
      Patch 10:
      j. messy rebase/merges to bring the commit up to date.
      
      Tests on HD clips encoded with all key frame showing consistent gain
      on all clips and all metrics:~0.5%(psnr) and 0.6%(ssim):
      http://www.corp.google.com/~yaowu/no_crawl/i8x8hd_allkey_fixedq.html
      
      To build and test, configure with:
      --enable-experimental --enable-i8x8
      
      Change-Id: I9813fe07ae48cab5fdb5d904bca022514ad01e7f
      ca6b85aa
  20. 10 Feb, 2011 1 commit
    • John Koleszar's avatar
      Fix relative include paths · 02321de0
      John Koleszar authored
      Allow compiling without adding vp8/{common,encoder,decoder} to the
      include paths.
      
      Change-Id: Ifeb5dac351cdfadcd659736f5158b315a0030b6c
      02321de0
  21. 09 Sep, 2010 1 commit
  22. 18 Jun, 2010 1 commit
    • John Koleszar's avatar
      cosmetics: trim trailing whitespace · 94c52e4d
      John Koleszar authored
      When the license headers were updated, they accidentally contained
      trailing whitespace, so unfortunately we have to touch all the files
      again.
      
      Change-Id: I236c05fade06589e417179c0444cb39b09e4200d
      94c52e4d
  23. 04 Jun, 2010 1 commit
  24. 18 May, 2010 1 commit