)]}'
{
  "commit": "83b47af18dd3a37c03a3b076b92091ea5c3b52a5",
  "tree": "70bbc1e93b612926671248b52fbceb97986037f4",
  "parents": [
    "c67dd39adc4a38a915a999f73f53430c08e83f9d"
  ],
  "author": {
    "name": "hui su",
    "email": "huisu@google.com",
    "time": "Thu Jan 07 14:29:26 2016 -0800"
  },
  "committer": {
    "name": "hui su",
    "email": "huisu@google.com",
    "time": "Wed Mar 16 11:55:50 2016 -0700"
  },
  "message": "Add \"entropy\" experiment\n\nThis patch added two features to improve entropy coding efficiency\nfor coefficient tokens.\n\n1. Choose 1 of 4 default probability tables based on q-index for\nkey-frames.\nIt is ported from nextgen branch:\nhttps://chromium-review.googlesource.com/#/c/280586/\n\n2. Do backward update after each superblock (64X64) row using\nsubframe token counts.\n\nCoding gain: 0.1% on lowres; 0.42% on midres; 0.36% on hdres.\nMuch larger gain for key-frames: 2.6%, 2.3%, 1.7%.\n\nDesign doc: go/huisu-entropy\n\nChange-Id: Ia3b6a615636be09247d70e4c520405637561532b\n",
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