1. 14 Jan, 2013 1 commit
    • Yaowu Xu's avatar
      Fix compiler warnings · 113005b1
      Yaowu Xu authored
      The warnings caused verify failure with gerrit for several  commits
      
      Change-Id: I030df8638bd69b8783a3ac58e720ff9f0bfd546c
      113005b1
  2. 13 Jan, 2013 1 commit
    • Deb Mukherjee's avatar
      Further enhancements/fixes on dct/dwt hybrid txfm · 516db21c
      Deb Mukherjee authored
      Fixes some scaling issues. Adds an option to only compute the
      dct on the low-low subband for 32x32 and 64x64 blocks using
      only a single 16x16 dct after 1 and 2 wavelet decomposition
      levels respectively. Also adds an option to use a 8x8 dct
      as building block.
      
      Currenlty with the 2/6 filter and with a single 16x16 dct on
      the low low band, the reuslts compared to full 32x32 dct is
      as follows:
      derf: -0.15%
      yt: -0.29%
      std-hd: -0.18%
      hd: -0.6%
      These are my current recommended settings, since the 2/6 filter
      is very simple.
      
      Results with 8x8 dct are about 0.3% worse.
      
      Change-Id: I00100cdc96e32deced591985785ef0d06f325e44
      516db21c
  3. 12 Jan, 2013 5 commits
  4. 11 Jan, 2013 7 commits
  5. 10 Jan, 2013 5 commits
  6. 09 Jan, 2013 1 commit
    • Adrian Grange's avatar
      New prediction filter · 7d6b5425
      Adrian Grange authored
      This patch removes the old pred-filter experiment and replaces it
      with one that is implemented using the switchable filter framework.
      
      If the pred-filter experiment is enabled, three interopolation
      filters are tested during mode selection; the standard 8-tap
      interpolation filter, a sharp 8-tap filter and a (new) 8-tap
      smoothing filter.
      
      The 6-tap filter code has been preserved for now and if the
      enable-6tap experiment is enabled (in addition to the pred-filter
      experiment) the original 6-tap filter replaces the new 8-tap smooth
      filter in the switchable mode.
      
      The new experiment applies the prediction filter in cases of a
      fractional-pel motion vector. Future patches will apply the filter
      where the mv is pel-aligned and also to intra predicted blocks.
      
      Change-Id: I08e8cba978f2bbf3019f8413f376b8e2cd85eba4
      7d6b5425
  7. 08 Jan, 2013 9 commits
  8. 07 Jan, 2013 3 commits
  9. 06 Jan, 2013 1 commit
  10. 04 Jan, 2013 3 commits
    • Adrian Grange's avatar
      Fix mode selection infinite loop bug · 81d1171f
      Adrian Grange authored
      Mode selection for SBs could enter an infinite loop because
      the interpolation filter mode index was not being reset
      correctly.
      
      Change-Id: I4bbe726f29ef5b6836e94884067c46084713cc11
      81d1171f
    • Paul Wilkins's avatar
      Further change to mv reference search. · c6ba3a3d
      Paul Wilkins authored
      This experimental change reorders the search so
      that all possible references that match the target
      reference frame are tested first and these in order
      of distance from the current block. These will usually
      be the highest scoring candidates.
      
      If we do not find enough good candidates this way
      we try non matching cases. These will usually be lower
      scoring candidates.
      
      The change in order together with breakouts when
      we have found enough candidates should reduce
      the computational cost and especially reduce the number
      of sort operations.
      
      Quality Results:
      Std Hd +0.228%, Hd +0.074%, YT +0.046%, derf +0.137%
      
      This effect is probably due to the fact that more distant
      weak candidates are now less likely to get "promoted" over
      near candidates even if they are repeated.
      
      Change-Id: Iec37e77d88a48ad0ee1f315b14327a95d63f81f6
      c6ba3a3d
    • Marco Paniconi's avatar
      Use seg/ref/mode offsets in loop_filter_partial. · bdca030c
      Marco Paniconi authored
      Use the proper seg/mode/ref filter offsets when selecting the
      frame loop filter level for fast mode (pick_filter_level_fast).
      
      Change-Id: I2473e2131c800ad19755cb6211ad735fecfe2ac0
      bdca030c
  11. 03 Jan, 2013 4 commits
    • Yaowu Xu's avatar
    • Yaowu Xu's avatar
    • Yaowu Xu's avatar
      make cost_coeffs() and tokenize_b() consistent · 83664f45
      Yaowu Xu authored
      Change-Id: I7cdb5c32a1400f88ec36d08ea982e38b77731602
      83664f45
    • Adrian Grange's avatar
      New interpolation filter selection algorithm · 259b8008
      Adrian Grange authored
      Old Scheme:
      When SWITCHABLE filter selection is enabled the encoder
      evaluates the use of each interpolation filter type and
      selects the best one to use at the MB level. A frame-
      level flag can be set to force the use of a particular
      filter type for all MBs in a frame if it is more efficient
      to encode that way. The logic here involved a Q dependent
      threshold that assumed that the second 8-tap filter was
      a high-pass filter. However, this requires a trip around
      the recode loop. If the frame-level flag indicates use
      of a particular filter, the other filters are not
      evaluated in the pick_mode loop.
      
      New Scheme:
      Each filter type is evaluated at the MB level and a record
      of the best filter is kept, irrespective of what filter
      is signaled at the frame-level. Once all MBs have been
      encoded, a decision is made as to what frame-level mode
      to set for the *next* frame. If one filter is used by 80%
      or more of the MBs, then this filter is forced since it
      is assumed that this will be more efficient if the
      next frame has similar characteristics. i.e. there is a
      one-frame lag between measuring the filter selection and
      setting the frame-level mode to use.
      
      Change-Id: I6a7e7ced8f27e120fafb99db2dc9c6293f8d20f7
      259b8008