vp9-rtc: Decrease noise estimation thresh for kLow

Increases denoising for noisy content.

Change-Id: Iff8573f8dca7b177ef53ee6682d691e6cd8e2740

diff --git a/vp9/encoder/vp9_noise_estimate.c b/vp9/encoder/vp9_noise_estimate.c
index fdafefd..9a6535d 100644 (file)
--- a/vp9/encoder/vp9_noise_estimate.c
+++ b/vp9/encoder/vp9_noise_estimate.c
@@ -97,7 +97,7 @@ NOISE_LEVEL vp9_noise_estimate_extract_level(NOISE_ESTIMATE *const ne) {
   } else {
     if (ne->value > ne->thresh)
       noise_level = kMedium;
-    else if (ne->value > ((9 * ne->thresh) >> 4))
+    else if (ne->value > (ne->thresh >> 1))
       noise_level = kLow;
     else
       noise_level = kLowLow;