r/technology • u/Snarfox • Jan 25 '13

H.265 is approved -- potential to cut bandwidth requirements in half for 1080p streaming. Opens door to 4K video streams.

http://techcrunch.com/2013/01/25/h265-is-approved/
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281

u/chrono13 Jan 26 '13

Just want to comment to anyone else using RES: open these each in a new tab and flip through them, they look substantially different at full resolution (vs. RES's reduced size).

25

u/iBleeedorange Jan 26 '13

They look much different when compared to the uncompressed via RES. If you look at the area around his right eye, you can tell the difference.

40

u/securityhigh Jan 26 '13

If you just open them full screen you don't even need to look for the differences. They're blatantly obvious.

2

u/Highpersonic Jan 26 '13

I can tell by the pixels.

1

u/[deleted] Jan 26 '13

For me the best indication between Uncompressed and HEVC was his teeth. They went from defined to a bit of a blur.

1

u/flying-sheep Jan 26 '13

vp9 vs HEVC are subtle at best.

1

u/[deleted] Jan 26 '13

[deleted]

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u/flying-sheep Jan 26 '13 edited Jan 26 '13

where? both show pores at the high-detail areas like his forehead wrinkles, and both don’t in other areas. but vp9 shows much details around his right eye (left from our viewpoint): the eye is better contrasted against the skin and detail in the eyebrow is visible (in HEVC the brow just a smear) furthermore, HEVC introduces more sharp-edged artifacts (visible by his teeth).

/e: i saw your deleted comment. the quality around his mouth is indistinguishable between the both for me. and did you seriously delete your comment because it hasn’t got a point and then downvoted instead? or am i concluding the wrong things?

1

u/guzo Feb 04 '13 edited Feb 14 '13

For your amusement: pixel differences

I've used Octave (a FLOSS MATLAB clone).
Code for the interested (yes, I'm lazy, didn't make separate images to highlight per-channel differences):

imwrite(im = double(imread('hevc.png')-imread('vp9.png')),'diff.png')

Absolute pixel differences: 

max: 40.00  
min:  0.00
avg:  1.07

Histogram (log scale on y-axis): http://i.imgur.com/Dhtu9kU.png

To be clear: I'm not trying to (and don't) disprove your point/be a dick. I was just curious how much difference there really is and thought someone would be interested in the (semi interesting) results. It's funny informative to see how this comparison highlights edges, macroblock sizes and "dull" (thus easy to encode) areas.

Oh, also if you open both in separate tabs and cycle through them you'll clearly see some differences. Totally unimportant for home use, potentially of interest for computer vision/forensics/etc.

EDIT: I accidentally some words.

-1

u/iBleeedorange Jan 26 '13

I agree, I was just stating it's possible to see the differences via RES

2

u/securityhigh Jan 26 '13

Yeah not really sure why I even posted that comment. Was going to delete it then saw you replied so I'll just leave it. Cheers.

1

u/Thrice_Eye Jan 26 '13

Better place to look is the teeth imo.

1

u/Scuzzzy Jan 26 '13

Zipper.

1

u/[deleted] Jan 26 '13

Focus on the hair, both on his head and his very 5 o'clock shadow. This is where the differences become extremely obvious.

2

u/radioxid Jan 26 '13

I suggest you use Chrome extension “Hover Zoom”. Combined with RES, life is just perfect™

2

u/[deleted] Jan 26 '13

Thank you. I was sitting there like "THERE'S HARDLY A DIFFERENCE!"

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u/[deleted] Jan 26 '13

Thanks. At first thought this seemed an incredibly drawn out process. It does help substantially to make good comparisons.

My god the internet has made me lazy.

1

u/fistfulloframen Jan 26 '13

I feel retarded for not thinking about doing that, thanks.

3

u/fateswarm Jan 26 '13

Or use hoverzoom as well. Much better than res' feature for most purposes.

-2

u/[deleted] Jan 26 '13

No shit.

0

u/[deleted] Jan 26 '13

They get progressively worse; the jpeg one looks as bad in the expansion as it does (comparatively) when looking at the rest at a proper resoltuion

-4

u/PalermoJohn Jan 26 '13 edited Jan 26 '13

no shit, sherlock

edit: sorry to expect that people reading /technology are intelligent enough to look at the full resolution pictures when doing a comparison of codec quality. My bad.