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| author | Yaowu Xu <yaowu@google.com> | 2011-05-25 16:07:37 -0700 |
|---|---|---|
| committer | Yaowu Xu <yaowu@google.com> | 2011-05-25 16:48:10 -0700 |
| commit | d8c525b8b1726dc1de18d7e729140592eb3d0b16 (patch) | |
| tree | 6e5f5078c4b12631f11c06f63c0218db744c25d9 /vp8/encoder/encodemb.h | |
| parent | 13b56eeb7a6a61c599c397a3b8cd5b6f77c2f07b (diff) | |
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fix the mix use of errorperbit and sadperbit
error_per_bit and sad_per_bit were designed as estimates of a bit worth
of sum squared error and sum absolute difference respectively. Under
this assumption, error_per_bit should be used in combination with 2nd
order errors (variance or sum squared error) while sad_per_bit should
be used in combination with 1st order SADs in motion estimation. There
were a few places where sad_per_bit has been misused with variances,
this commit changes to use error_per_bit for those places, also changes
parameter names to properly indicate which constant is being used.
On cif set, the change has a universal gain by all metrics: 0.13% by
average/overall psnr and 0.1% by ssim.
Change-Id: I4850fdcc3fd6886b30f784bd843f13dd401215fb
Diffstat (limited to 'vp8/encoder/encodemb.h')
0 files changed, 0 insertions, 0 deletions