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(parent: b068888) | patch
Separate frame context index for GOP layers
authorJingning Han <jingning@google.com>
Fri, 7 Sep 2018 23:37:42 +0000 (16:37 -0700)
committerJingning Han <jingning@google.com>
Mon, 10 Sep 2018 16:19:46 +0000 (09:19 -0700)
commit740083a97bb3ef0a11e45977611402a047099cfb
tree340eac594a5326582db8a29a1512b10a279c1100tree | snapshot
parentb0688880281eb4015a00eb854fb0d6a352b35bdbcommit | diff
Separate frame context index for GOP layers

Use separate frame context index to code frames at different layers.
The maximum index cap is set as 3. This improves the compression
performance of multi-layer ARF by 0.15% across the test sets.

The overall coding gains from multi-layer ARF are

         avg PSNR       ovarall PSNR        SSIM
lowres   -3.9%            -3.7%            -3.2%
midres   -3.5%            -3.2%            -2.3%
nflx2k   -4.3%            -4.6%            -3.0%

Change-Id: I8a0b345fdd47823c018544a6b4748753faf89dc1
vp9/encoder/vp9_encoder.c diff | blob | history
vp9/encoder/vp9_firstpass.c diff | blob | history
Domain: Multimedia / Codec;