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18th March 2004, 08:23 | #2 | Link |
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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, 13:42 | #4 | Link | |
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21st March 2004, 16:20 | #5 | Link |
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from what i read on the envivio page, rdo is part of h.264
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21st March 2004, 17:01 | #6 | Link |
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@ 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.
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21st March 2004, 17:24 | #7 | Link |
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@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 |
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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. |
22nd March 2004, 12:53 | #9 | Link | |
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Quote:
Actually RDO is based on Lagrange Multipliers which is a mathematical method for solving several problems that resemble "motion estimetion" in video coding. |
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