tree 430b38fc195e529a38b1ef001bdbb44527692527
parent 3ffdc1ab755f17526a8bead715a0d67fe9b61846
author Jingning Han <jingning@google.com> 1623014068 -0700
committer Jingning Han <jingning@google.com> 1623281484 +0000

Evaluate macroblock variance post Wiener filter

Estimate the local grain noise and use the Wiener filter to
obtain the underlying signal's variance on macroblock basis.
Calculate the frame level mean variance and use it for equilibrium
later.

Change-Id: I0d748ed215ec5ac69f64a552ff3a084c32b7a691