shithub: libvpx

Info  •  Files  •  Log  •  Branches

vp9-denoiser: Bias to last for golden long term

If golden referene is selected as long-term reference,
bias the denoiser filter to use last reference.
Fixes visual artifact.

And reduce the thresh_svc_golden, which was used
to reduce the artifact occurrence.

Change-Id: I08f24160ca11bd8f5f70acaefe989d5f92988132

--- a/vp9/encoder/vp9_denoiser.c

+++ b/vp9/encoder/vp9_denoiser.c

@@ -219,9 +219,7 @@

   // If the best reference frame uses inter-prediction and there is enough of a

   // difference in sum-squared-error, use it.

-  if (frame != INTRA_FRAME && frame != ALTREF_FRAME &&

-      (frame != GOLDEN_FRAME || num_spatial_layers == 1 ||

-       use_gf_temporal_ref) &&

+  if (frame != INTRA_FRAME && frame != ALTREF_FRAME && frame != GOLDEN_FRAME &&

       sse_diff > sse_diff_thresh(bs, increase_denoising, motion_magnitude)) {

     mi->ref_frame[0] = ctx->best_reference_frame;

     mi->mode = ctx->best_sse_inter_mode;

@@ -233,6 +231,7 @@

     // Bias to last reference.

     if ((num_spatial_layers > 1 && !use_gf_temporal_ref) ||

         frame == ALTREF_FRAME ||

+        (frame == GOLDEN_FRAME && use_gf_temporal_ref) ||

         (frame != LAST_FRAME &&

          ((ctx->zeromv_lastref_sse<(5 * ctx->zeromv_sse)>> 2) ||

           denoiser->denoising_level >= kDenHigh))) {

--- a/vp9/encoder/vp9_pickmode.c

+++ b/vp9/encoder/vp9_pickmode.c

@@ -1699,7 +1699,7 @@

   int svc_mv_row = 0;

   int no_scaling = 0;

   unsigned int thresh_svc_skip_golden = 500;

-  unsigned int thresh_skip_golden = (bsize >= BLOCK_32X32) ? 2500 : 500;

+  unsigned int thresh_skip_golden = 500;

   int scene_change_detected =

       cpi->rc.high_source_sad ||

       (cpi->use_svc && cpi->svc.high_source_sad_superframe);