about rdo of h.264

yrenjie · 18th March 2004, 02:20

What's the difference between RDO and no RDO in h.264 standard??
The criterion of mode decison is SAD in no RDO and it is the result of
RDO equation in RDO mode??
thanks!

shlezman · 18th March 2004, 08:23

yrenjie,
RDO is not a part of the h.264 standard.
It's an algorithm which uses a "smarted" parameter for motion vectors and mode decisions, rather then a simple SAD, just as you wrote.
some articles on that issue can be found at Thomas Wiegand page
http://bs.hhi.de/~wiegand/JVT.html

justin · 21st March 2004, 05:55

did you notice that website was part of the heinrich hertz institute? That's Hitler!

Leak · 21st March 2004, 13:42

Quote:

Originally posted by justin
did you notice that website was part of the heinrich hertz institute? That's Hitler!

Oh my... it's even part of the Fraunhofer Institute - that's MP3!

You're not really funny, you know?

np: The Orb - Star 6 & 7 8 9 (Adventures Beyond The Ultraworld)

bond · 21st March 2004, 16:20

from what i read on the envivio page, rdo is part of h.264

ac-chan123 · 21st March 2004, 17:01

@ justin: not evry one how is life in germany is a Nazi. Heinrich Hertz(1857 - 1894) has died befor Hitler(1889 -1945)was know. have a look at this Site http://securehosts.com/fecha/hertz.htm.

AC-Chan(Robert Vincenz)

shlezman · 21st March 2004, 17:24

@bond
The RDO (Rate-Distortion-Optimizations) are a technique for "motion estimation" and mode decision, instead of simple SAD a Cost parameter is derived. The JVT reference software uses this method for coding decisions. Originally the method was tested and used in H.263 (and MPEG-4) as you probably read in the articles reffered

@justin , ac-chan123
Being sensitive to the holocaust issue, I'd appriciate if you just stick to the thread's subject.

temporance · 22nd March 2004, 12:13

Xvid uses RDO too. They call it VHQ. And I believe the DivX encoder also does RDO - when you set it to the slower encoding modes.

So it's nothing unique to H.264. What is interesting, though, is that the JVT code is the first reference software to implement RDO.

shlezman · 22nd March 2004, 12:53

Quote:

Originally posted by temporance
What is interesting, though, is that the JVT code is the first reference software to implement RDO.

I guess it has something to do with the people that lead the JVT, these are the same people who first used RDO for video coding

Actually RDO is based on Lagrange Multipliers which is a mathematical method for solving several problems that resemble "motion estimetion" in video coding.

18th March 2004, 02:20	#1 \| Link
yrenjie Registered User Join Date: Jan 2004 Posts: 3	about rdo of h.264 What's the difference between RDO and no RDO in h.264 standard?? The criterion of mode decison is SAD in no RDO and it is the result of RDO equation in RDO mode?? thanks!

21st March 2004, 16:20	#5 \| Link
bond Registered User Join Date: Nov 2001 Posts: 9,770	from what i read on the envivio page, rdo is part of h.264 __________________ Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ \| AVC/H.264 FAQ \| AAC FAQ \| MP4 FAQ \| MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora \| Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free

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18th March 2004, 08:23	#2 \| Link
shlezman Registered User Join Date: Jan 2003 Posts: 69	yrenjie, RDO is not a part of the h.264 standard. It's an algorithm which uses a "smarted" parameter for motion vectors and mode decisions, rather then a simple SAD, just as you wrote. some articles on that issue can be found at Thomas Wiegand page http://bs.hhi.de/~wiegand/JVT.html

21st March 2004, 05:55	#3 \| Link
justin Registered User Join Date: May 2003 Location: Canada Posts: 50	did you notice that website was part of the heinrich hertz institute? That's Hitler!

21st March 2004, 17:01	#6 \| Link
ac-chan123 Registered User Join Date: Jan 2004 Posts: 219	@ justin: not evry one how is life in germany is a Nazi. Heinrich Hertz(1857 - 1894) has died befor Hitler(1889 -1945)was know. have a look at this Site http://securehosts.com/fecha/hertz.htm. AC-Chan(Robert Vincenz)

21st March 2004, 17:24	#7 \| Link
shlezman Registered User Join Date: Jan 2003 Posts: 69	@bond The RDO (Rate-Distortion-Optimizations) are a technique for "motion estimation" and mode decision, instead of simple SAD a Cost parameter is derived. The JVT reference software uses this method for coding decisions. Originally the method was tested and used in H.263 (and MPEG-4) as you probably read in the articles reffered @justin , ac-chan123 Being sensitive to the holocaust issue, I'd appriciate if you just stick to the thread's subject.

22nd March 2004, 12:13	#8 \| Link
temporance Registered User Join Date: Mar 2002 Posts: 486	Xvid uses RDO too. They call it VHQ. And I believe the DivX encoder also does RDO - when you set it to the slower encoding modes. So it's nothing unique to H.264. What is interesting, though, is that the JVT code is the first reference software to implement RDO.