Commit 7c03a1c3 authored by Yaowu Xu's avatar Yaowu Xu
Browse files

adjust RDMULT for UV plane in quantization RDO

This patch adds a weighting factor on RDMULT for UV blocks. The change
has an overall gain about 0.5% based on ssim, between 0.1 and 0.2% by
psnr numbers.

Change-Id: I97781b077ce3bb7e34241b03268491917e8d1d72
parent 9c8ad79f
......@@ -243,9 +243,9 @@ struct vp8_token_state{
};
// TODO: experiments to find optimal multiple numbers
#define Y1_RD_MULT 1
#define UV_RD_MULT 1
#define Y2_RD_MULT 4
#define Y1_RD_MULT 4
#define UV_RD_MULT 2
#define Y2_RD_MULT 16
static const int plane_rd_mult[4]=
{
......@@ -309,7 +309,7 @@ void vp8_optimize_b(MACROBLOCK *mb, int ib, int type,
eob = d->eob;
/* Now set up a Viterbi trellis to evaluate alternative roundings. */
rdmult = (mb->rdmult << 2)*err_mult;
rdmult = mb->rdmult * err_mult;
if(mb->e_mbd.mode_info_context->mbmi.ref_frame==INTRA_FRAME)
rdmult = (rdmult * 9)>>4;
......
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