• Yaowu Xu's avatar
    Improve the accuracy of forward walsh-hadamard transform · b62d093e
    Yaowu Xu authored
    Besides the slight improvement in round trip error. This
    also fixes a sign bias in the forward transform, so the
    round trip errors are evenly distributed between +1s and
    -1s. The old bias seemed to work well with the dc sign bias
    in old fdct,  which no longer exist in the improved fdct.
    Change-Id: I8635e7be16c69e69a8669eca5438550d23089cef
dct.c 2.51 KB