• Jingning Han's avatar
    Rework partition search skip scheme · bb260d90
    Jingning Han authored
    This commit enables the encoder to skip split partition search if
    the bigger block size has all non-zero quantized coefficients in low
    frequency area and the total rate cost is below a certain threshold.
    It logarithmatically scales the rate threshold according to the
    current block size. For speed 3, the compression performance loss:
    derf  -0.093%
    stdhd -0.066%
    
    Local experiments show 4% - 20% encoding speed-up for speed 3.
    blue_sky_1080p, 1500 kbps
    51051 b/f, 35.891 dB, 67236 ms ->
    50554 b/f, 35.857 dB, 59270 ms (12% speed-up)
    
    old_town_cross_720p, 1500 kbps
    14431 b/f, 36.249 dB, 57687 ms ->
    14108 b/f, 36.172 dB, 46586 ms (19% speed-up)
    
    pedestrian_area_1080p, 1500 kbps
    50812 b/f, 40.124 dB, 100439 ms ->
    50755 b/f, 40.118 dB,  96549 ms (4% speed-up)
    
    mobile_calendar_720p, 1000 kbps
    10352 b/f, 35.055 dB, 51837 ms ->
    10172 b/f, 35.003 dB, 44076 ms (15% speed-up)
    
    Change-Id: I412e34db49060775b3b89ba1738522317c3239c8
    bb260d90
vp9_speed_features.c 15.9 KB