• Jingning Han's avatar
    Re-design quantization process · 9ac2f663
    Jingning Han authored
    This commit re-designs the quantization process for transform
    coefficient blocks of size 4x4 to 16x16. It improves compression
    performance for speed 7 by 3.85%. The SSSE3 version for the
    new quantization process is included.
    The average runtime of the 8x8 block quantization is reduced
    from 285 cycles -> 255 cycles, i.e., over 10% faster.
    Change-Id: I61278aa02efc70599b962d3314671db5b0446a50