[x265] Compression Gains...follow up

[N Vijay Anand]

1. Following simulation test results for :

Release\x265.exe --input-res 1920x1080 --fps 30 --input
c:\users\vanand\Work_Docs\Codecs\video\yuv\jogging_girl_hd.yuv --wpp
 --ctu=64 --min-cu-size=8 --max-tu-size=32 --tu-intra-depth=1
--tu-inter-depth=1 --me=3 --subme=3 --merange=57 --rect --no-amp
--max-merge=3 --temporal-mvp --no-early-skip --rdpenalty=0 --no-tskip
--no-tskip-fast --strong-intra-smoothing --no-lossless --no-cu-lossless
--no-constrained-intra --no-fast-intra --open-gop --no-temporal-layers
--interlace=0 --keyint=240 --min-keyint=24 --scenecut=40 --rc-lookahead=60
--lookahead-slices=0 --bframes=8 --bframe-bias=0 --b-adapt=2 --ref=5
--limit-refs=3 --limit-modes --weightp --no-weightb --aq-mode=1
--qg-size=16 --aq-strength=1.00 --cbqpoffs=0 --crqpoffs=0 --rd=4
--psy-rd=2.00 --rdoq-level=2 --psy-rdoq=5.00 --signhide --deblock=-3:-3
--sao --no-sao-non-deblock --b-pyramid --no-cutree --crf 20 --qcomp=0.60
--qpstep=8 --ipratio=1.40 --pbratio=1.30 -o jogging_girl_hd.hevc -r
Tri_recon.yuv

2. Results Comparison with x265 and Tri_x265 :

a. File Size
     3262 KB with x265.exe
     2199 KB with motion.cpp updates.

b. PSNR (averaged over all frames)
     42.517651, 40.457312, 41.976125 with x265.exe
     41.841875, 39.714572, 41.410004 with motion.cpp updates

3. 4x compute increase is in last mile stage of ME - qpel/hpel.
    Full pel - increase due to book keeping alone.
    Savings are seen in all presets, and statistically this result
    holds good on all video sequence barring news reading type of sequence.


Vijay
-- 
Principal Architect and Director,
TriSpace Technologies Pvt Ltd.,
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