1. 15 Aug, 2014 19 commits
  2. 14 Aug, 2014 17 commits
  3. 13 Aug, 2014 4 commits
    • Jingning Han's avatar
      Allow full coeff probability model and cost update · ccef8842
      Jingning Han authored
      This commit moves the simplified coefficient probability model
      and costing update to speed 4, and turns on chessboard pattern
      mode search for sub 720p sequences. The overall coding performance
      of speed 3 is improved:
      derf  0.889%
      stdhd 1.744%
      
      The speed 3 runtime for test sequences are improved:
      bus cif at 1000 kbps 9823 ms -> 9642 ms
      pedestrian 1080p 2000 kbps 189559 ms -> 183284 ms
      
      Change-Id: Iecbc7496a68f31fd49fb09f8dfd97c028d675a5d
      ccef8842
    • Jingning Han's avatar
      Skip mode search based on reference frame consistency · 1e305479
      Jingning Han authored
      This commit enables the encoder to skip NEARMV and ZEROMV if the
      above and left blocks have identical reference frame, and the
      current reference is different from that. It reduces the runtime
      of speed 3 for test sequences:
      bus cif at 1000 kbps 10064 ms -> 9823 ms
      pedestrian 1080p at 2000 kbps 193078 ms -> 189559 ms
      
      The compression performance is changed by
      derf  -0.085%
      stdhd -0.103%
      
      Change-Id: If304f26d42e6412152a84c3dd7b02635c38444f4
      1e305479
    • Jingning Han's avatar
      6e086548
    • Jingning Han's avatar
      Enable motion field based mode seach skip · 0daadeb6
      Jingning Han authored
      This commit allows the encoder to check the above and left neighbor
      blocks' reference frames and motion vectors. If they are all
      consistent, skip checking the NEARMV and ZEROMV modes. This is
      enabled in speed 3. The coding performance is improved:
      
      pedestrian area 1080p at 2000 kbps,
      from  74773 b/f, 41.101 dB, 198064 ms
      to    74795 b/f, 41.099 dB, 193078 ms
      
      park joy 1080p at 15000 kbps,
      from 290727 b/f, 30.640 dB, 609113 ms
      to   290558 b/f, 30.630 dB, 592815 ms
      
      Overall compression performance of speed 3 is changed
      derf  -0.171%
      stdhd -0.168%
      
      Change-Id: I8d47dd543a5f90d7a1c583f74035b926b6704b95
      0daadeb6